REVIEWS PHYSIOLOGY 26: 54 – 69, 2011; doi:10.1152/physiol.00024.2010 Oxidative Stress and Cell Membranes in the Pathogenesis of Alzheimer’s Disease Amyloid  proteins and oxidative stress are believed to have central roles in the development of Alzheimer’s disease. Lipid membranes are among the Paul H. Axelsen,1,2 Hiroaki Komatsu,1 and Ian V. J. Murray3 Departments of 1Pharmacology, 2Biochemistry and Biophysics, and Medicine, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania; and 3Department of Neuroscience and Experimental Therapeutics, Texas A&M Health Science Center, College Station, Texas most vulnerable cellular components to oxidative stress, and membranes in susceptible regions of the brain are compositionally distinct from those in other tissues. This review considers the evidence that membranes are either a source of neurotoxic lipid oxidation products or the target of pathogenic processes involving amyloid  proteins that cause permeability changes or ion disease pathogenesis is discussed in which lipid membranes assume both roles and promote the conversion of monomeric amyloid  proteins into fibrils, the pathognomonic histopathological lesion of the disease. The literature of Alzheimer’s disease (AD) research is vast, complex, and often contradictory. Nevertheless, a broad perspective on this literature, and on what typically does and does not happen in biological systems, suggests either that lipid membrane damage is directly involved in the pathogenesis of AD or that it is an important consequence of AD. Therefore, investigations into the relationship between membrane damage and amyloidogenesis may yield important insights into AD pathogenesis. The “amyloid hypothesis” has driven much of the research on AD pathogenesis since it was proposed in 1991 (123, 124). In its simplest form, this hypothesis suggests that the accumulation of amyloid beta (A) proteins in brain tissue drives the pathogenesis of AD. A proteins originate from a large transmembrane protein of unknown function known as amyloid precursor protein (APP) by the action of -secretase and ␥-secretase activity (FIGURE 1). The specific cleavage site of ␥-secretase is somewhat variable, yielding proteins ranging from 39 to 43 residues in length, with 40 and 42 residue forms predominating (A40 and A42). The non-amyloidogenic pathway for APP processing involves ␣-secretases, a family of enzymes that cleave APP near the middle of the A protein segment. The amyloid hypothesis was initially based on genetic studies of familial AD and the occurrence of AD-like pathology in Down Syndrome. Among the most cited experimental studies in support of this hypothesis are those in which A proteins impair physiological and cognitive function when injected into rodent brains (72, 136, 184, 282, 320, 336). Nevertheless, the amyloid hypothesis has been criticized for being incomplete and vague. 54 For example, it is unable to explain nonfamilial or sporadic cases of AD (the most prevalent form), how fibril formation leads to neuronal death, the poor clinicopathological correlation between amyloid plaque burden and cognitive impairment (279), the hyperphosphorylation and aggregation of tau proteins as neurofibrillary tangles, and axonopathies that precede amyloid deposition (302). These criticisms notwithstanding, there are no alternative hypotheses with nearly as much support, and the amyloid hypothesis is readily adapted to answer some of these criticisms. For example, the pathologies that precede amyloid deposition may be due to prefibrillar intermediate forms of A protein, and plaques may represent an inert form of the protein (62, 125, 337). Supporting this idea is the observation that a variant form of A that oligomerizes but does not fibrillize can nonetheless cause several pathological manifestations of AD other than fibril formation (318). It has been suggested that there is a tenuous balance among the rates of A protein production, aggregation, and elimination in brain tissue, such that a small disturbance applied over sufficient time causes the pathological accumulation of A protein as amyloid fibrils in AD. However, the concentrations of A proteins in the brain appear to be far lower than their aqueous in vitro solubility (143, 238, 281). Therefore, A proteins should not form amyloid fibrils in the brain even if concentrations are modestly elevated. Yet, fibrils do form with advancing age in virtually everyone, indicating that factors other than A protein concentration must have a role in causing them to form. If small changes in protein concentration cannot account for fibril formation, then we must consider factors 1548-9213/11 ©2011 Int. Union Physiol. Sci./Am. Physiol. Soc. Downloaded from http://physiologyonline.physiology.org/ by 10.220.32.247 on June 15, 2017 channel formation. Progress toward a comprehensive theory of Alzheimer’s REVIEWS such as macromolecular crowding (216, 228), locally high concentrations of A proteins at synapses (71), chemical modification (30, 161, 231, 287, 360), cross-linking (17, 22, 290, 291), or metal complex formation (6, 31, 92, 105, 153, 272, 284, 306). Understanding the chemical mechanisms that reduce the solubility of A proteins in brain tissue is key to understanding why AD pathology develops in some individuals and not others. Oxidative Stress Downloaded from http://physiologyonline.physiology.org/ by 10.220.32.247 on June 15, 2017 Oxidative stress is caused by a dense, complex and heterogeneous network of oxidizing reactions running counter to the reducing conditions that otherwise prevail in cells and tissues. It has been suggested that the accumulation of A proteins in the brain may be a protective response to oxidative stress (16, 28, 162, 164, 273, 292). The density of plaques containing A protein correlates inversely with markers of oxidative damage (75), and the cortical deposition of A proteins correlates with reduced oxidative damage in Down syndrome (236). Moreover, A proteins prevent lipoprotein oxidation (163) and metal-induced neuronal death in culture (363). However, it is inherently difficult to quantify oxidative stress, and attempts to do this are subject to many methodological pitfalls. For example, a study concluding that the primary mechanism of A toxicity does not involve oxidative pathways measured thiobarbituric acid reactive substances (TBARS) to assess lipid peroxidation (248). However, assays for TBARS measure only a small subset of the diverse oxidation products generated, as well as substances not derived from lipids. Other studies suggesting that A has antioxidant activity were not controlled for the inherent redox activity of peptide groups or conducted in the presence of biologically relevant electron donors and acceptors to drive the reactions (23, 24). Overall, it seems more likely that A proteins promote oxidative stress (42, 50, 91, 201, 202, 254). The brain in AD appears to sustain more oxidative damage than normal brain (200, 211, 331), exhibits an increased susceptibility to oxidative stress (190, 220, 277), and has relatively low levels of naturally occurring antioxidants such as ␣-tocopherol (144, 358). Regions of the brain rich in A proteins also have increased levels of protein oxidation (129). The overexpression of A proteins in transgenic mice, in C. elegans, and in cell culture, increases biomarkers of oxidative stress (256, 345). A proteins cause H2O2 and lipid peroxides to accumulate in cells (27). Catalase protects cells from A toxicity, and cell lines selected for resistance to A toxicity also become resistant to the cytotoxic action of H2O2. A proteins promote the oxidation of compounds such as dopamine, phospholipids, and cholesterol (40, 134, 135, 235, 241, 257, 356) as long as an intact methionine side chain is present (5, 21, 45, 47, 49, 232). A proteins and amyloid plaques bind redoxactive transition metals that are likely to be the actual site of redox activity (76, 273). Copper levels are significantly increased in amyloid plaques (183, 191, 304), although comparatively subtle increases in copper transport across cell membranes may cause significant changes in A protein turnover (321). Excess dietary copper increases AD-like pathology in a mouse model (160). Cu2⫹ and Zn2⫹ chelators appear to inhibit A deposition in the brains of mouse models (64), and metal depletion promotes the disaggregation of A fibrils (65). Cu2⫹ potentiates the neurotoxicity of A42 ⬎ A40 in embryonic rodent neurons, and its effect is mediated by H2O2 (135, 355). Studies of copper in the pathogenesis of AD have been extensively reviewed (39, 90, 100, 305). In contrast, Zn2⫹ ions are redoxinert and able to protect/rescue human cells in tissue culture from A and Cu2⫹ toxicity (75). A recent study, however, observed that the zinc released at synapses with neurotransmitters caused the accumulation of toxic A oligomers to these membranes (86). It has been suggested that A proteins split into fragments that are both neurotoxic and able to generate additional oxygen radicals (48, 128), although these findings have been strongly refuted (89). Nevertheless, electron paramagnetic resonance spectroscopy has shown that there is a strong correlation between the intensity of radical generation by A and neurotoxicity (219). In these studies, preincubation of A to form fibrils increased its toxicity. In contrast, replacing the redox-active sulfur atom in residue Met35 with methylene (CH2) resulted in a peptide that formed fibrillar structures but had no demonstrable toxicity toward cultured hippocampal neurons. In the same experimental system, vitamin E (presumably acting as an antioxidant) neutralized the neurotoxicity of A but had no effect on its ability to form FIGURE 1. Processing of the amyloid precursor protein A proteins are 39- to 43-residue segments within the 770-residue amyloid precursor protein (APP), beginning at residue 672. The non-amyloidogenic processing pathway is catalyzed by ␣-secretase, which cleaves in the midst of the A protein segment. The amyloidogenic pathway is catalyzed by -secretase, which cleaves an extracellular site of APP, and ␥-secretase, which cleaves at points within the transmembrane segment. PHYSIOLOGY • Volume 26 • February 2011 • www.physiologyonline.org 55 REVIEWS Enter Lipid Membranes Investigations into the role of lipids in AD are experimentally challenging because they are chemically diverse, with thousands of distinct molecular species present in every cell. They are also physically diverse, rarely existing as monomeric species in solution unless protein bound. In vitro, the vast majority form micelles or vesicles, and the latter may be unilamellar or multilamellar. Thus lipid suspensions generally have two or more phases and complex interphase equilibria. This physical heterogeneity complicates most types of physicochemical analysis, even when pure synthetic lipid preparations are used, and it makes some others outright impossible. It also impedes the measurement of fibril formation. Turbidity measurements, for example, are confounded by ambiguity over whether the species causing the turbidity is protein or lipid. Lipids markedly increase the fluorescence of the thioflavin T apart from fibril formation, whereas assays based on Congo Red absorbance ratios entail practical restrictions on protein and lipid concentrations that limit the flexibility of this assay. The presence of membranes can also complicate sample preparation, and they yield artifacts when the halogenated solvents used to disaggregate A proteins are not completely removed (56, 310). Due in part to these challenges, the evidence that cell membranes are involved in the pathogenesis of AD remains largely circumstantial, even though the amount of evidence pointing to some 56 PHYSIOLOGY • Volume 26 • February 2011 • www.physiologyonline.org type of link is overwhelming. A proteins are produced by cleavage of APP at two sites, one site being located approximately at the midpoint of the transmembrane segment (FIGURE 1). As a consequence, the COOH-terminal residues of A proteins that were part of the APP transmembrane segment are uniformly hydrophobic. Following their cleavage from APP, some investigators have observed that A proteins remain associated with detergent-resistant lipid membrane domains in the brain (181), or with membrane-anchored APP (189). It has also been hypothesized that A proteins bind to the transmembrane helices of membrane proteins and cause their dysfunction (199). Ultrastructural studies suggest that amyloid fibril formation tends to occur first in portions of diffuse amyloid deposits that are closest to membranes (234, 319, 346). A40 with the E22Q mutation (responsible for hereditary cerebral hemorrhage with amyloidosis-Dutch type) will fibrillize on the surface membrane of human cerebrovascular smooth muscle cells (330). Despite a substantial hydrophobic segment, the general conclusion reached by most investigators is that A proteins have little affinity for neutral lipid membranes (205). Techniques such as the hydration of a mixed protein-lipid film must be used to induce the penetration of A proteins into a neutral lipid bilayer (83). One laboratory investigating A40 and another investigating A42 have documented that the proteins situate differently in membranes depending on whether they are embedded in a bilayer membrane or allowed to associate with the surface of a preformed membrane (33, 106, 176). In general, anionic lipids tend to induce A proteins to adopt extended  structure (35, 63, 66, 76, 130, 167–169, 204, 213, 214, 313, 314, 344, 352). Possible reasons for the inducement of  structure and fibril formation by protein-lipid interaction have been reviewed, including the ability of such interactions to serve as templates for structural change, to increase the local concentration of protein, and to orient protein monomers relative to each other (2, 113). A proteins adopt ␣-helical structure in association with lipid membranes at low lipid-to-protein ratios (315), at high cholesterol concentrations (145), or in conjunction with metal ions (21, 76, 77). Some investigators have found that detergent micelles promote ␣-helical structure (283), whereas others find that it promotes the formation of oligomers with  structure (261). Spontaneous insertion into various membranes has been observed for A segments (82) and for A proteins at relatively low membrane surface pressures (94). The relative abundance of various lipid classes in membranes is altered in AD (121, 227, 247, 252, 350), and altering membrane composition protects PC12 cells from toxic effects of A proteins (338). Downloaded from http://physiologyonline.physiology.org/ by 10.220.32.247 on June 15, 2017 fibrils (332). Another study concluding that free radicals do not mediate A-induced neurotoxicity used ginkgolides (a purported anti-oxidant component of Ginkgo biloba leaves) and vitamin E to inhibit oxidation (351). Although neither agent protected cells from apoptosis and death, it is unlikely that they completely halted radical-mediated oxidative damage. Proteomics studies of oxidative stress have focused on proteins damaged by oxidation, nitration, and other reactive substances (41, 44, 50, 51, 57, 58, 60, 80, 107, 243, 285, 293, 317). In most cases, reactions with protein carbonyl groups are taken for evidence of damage by oxidation, and the nature of the protein modification is not explicitly defined. Two studies have examined the ability of A proteins to induce oxidative modifications in other proteins (34), and A proteins may also undergo oxidative damage, particularly His, Tyr, and Met side chains (15, 32, 43, 132, 139). However, it is difficult to imagine how oxidative damage to proteins, especially A proteins, would lower the aqueous solubility of A proteins and promote fibril formation. REVIEWS with lovastatin/mevalonate alone, however, was insufficient to induce a significant effect; treatment with -cyclodextrin to achieve a 70% reduction of cellular cholesterol content was also required. It has been suggested that the dependence of A protein production on cholesterol is due to the selective activity of -secretase activity in cholesterol-dependent raft-like subdomains of the plasma membrane, whereas ␣-secretase activity appears to predominate in non-raft domains (95). Some -secretase stimulation has also been attributed to neutral glycosphingolipids and anionic phospholipids (152). The efficacy of a -secretase inhibitor has been increased by linking it to cholesterol and thereby targeting it to membranes (260). Downloaded from http://physiologyonline.physiology.org/ by 10.220.32.247 on June 15, 2017 Altered physical properties, presumably arising from compositional differences, have been observed in hippocampal membranes of AD brains (364). Plasmalogen deficiency is frequently associated with AD (102, 110 –112, 119, 120, 229). In addition to having an effect on membrane physical properties, plasmalogens are particularly susceptible to oxidative damage (156 –158). This susceptibility may confer on plasmalogens the ability to protect other lipid species by diverting and trapping oxidizing agents (36, 117, 118, 170, 195, 196, 222, 230, 242, 264, 362). Cerebral white matter is enriched in plasmalogens for unknown reasons (101). Human epidemiological studies support a link between AD and the consumption of -3 polyunsaturated fatty acyl (PUFA) chains (103, 141, 223, 224, 237, 250, 275, 323), and this association is supported by animal model and cell culture studies (53–55, 126, 146, 185, 193, 350). The most prevalent -3 PUFA in the brain is docosahexaenoic acid (DHA), and dietary DHA supplementation alleviates both AD-like histopathology and cognitive impairment in animal models (53, 55, 126, 185). The metabolism of DHA in normal brain is remarkable in several respects (159), and it is difficult to induce a measurable deficiency of DHA-containing lipids in the brain tissue of animal models through dietary restriction (84). Animal studies have shown that the brain responds to a dietary deficiency of DHA by elongating arachidonic acid (ARA) chains. Because there are no enzymes capable of desaturating the distal end of these PUFA chains, the result is a marked increase in docosapentaenoic acid (DPA) chains (138). A proteins appear to have special relationships or interactions with specific lipid species. For example, the ganglioside GM1 is bound together with A proteins in diffuse amyloid plaques (348). GM1containing membranes promote the formation of ␣ structure (212, 215),  structure (206), or fibrils in vitro (67– 69, 115, 127, 148 –151, 165, 207, 218, 239, 240, 334, 335). In several of these reports, GM1 is presented in raft-like membrane subdomains in which cholesterol is a significant component, and rafts have also been discussed as an influence on the processing of APP into A proteins (74). Apart from rafts, cholesterol has been epidemiologically (289, 311) and experimentally (263, 300) linked to the incidence of AD, and it may influence the production (108, 361), location (77, 87, 145), behavior (79, 214, 352), or toxicity (38, 78, 137, 308, 338) of A proteins. In models of Niemann-Pick Type C disease, A proteins accumulate along with cholesterol (347). Cholesterol depletion reduced the -cleavage of APP and the production of A proteins in a study of neurons in the rat hippocampus (288). Treatment The Membrane as Villain The lipids in cell membranes are often regarded as being chemically unreactive and merely a physical barrier or a support matrix for proteins. That view is misleading on many levels, of course, but particularly so when the membrane lipids contain PUFA chains and are subjected to oxidative stress. Reviews of the role of membranes in AD pathogenesis frequently overlook the effects of oxidative stress and chemical modification of PUFA chains on membrane properties. A proteins have a prooxidant activity toward polyunsaturated lipids that can be neutralized by lipophilic antioxidants, chelation of metal ions, anaerobic conditions, mutation of His13 or His14 to Ala, or modification of the Met35 side chain (232). Lipid oxidation products and the susceptibility of lipids to oxidative damage are both increased in AD (78, 104, 210, 309). Several reports have outlined the potential for a complex interplay between cholesterol oxidation products and A proteins (38, 116, 235, 241, 301, 329, 356, 360). The myriad mechanisms of oxidative stress yield diverse chemically reactive products from PUFA chains including hydroxy- and hydroperoxy-lipids that undergo spontaneous decomposition, lipid free radicals that may participate in free-radical chain reactions, as well as fragments such as malondialdehyde, acrolein, and hydroxynonenal with the potential to form adducts with proteins and nucleic acids (61, 270, 274, 293, 295, 296). These materials are direct toxic threats to the tissues in which they are generated. Brain is the most lipidrich organ in the body, and it contains more lipids bearing PUFA chains than any other organ. Therefore, brain tissue is at particularly high risk for chemical injury due to highly reactive lipid oxidation products. Evidence that lipid peroxidation may be involved in the pathogenesis of AD has been extensively reviewed (13, 42, 46, 201). Lipid hydroperoxides PHYSIOLOGY • Volume 26 • February 2011 • www.physiologyonline.org 57 REVIEWS 58 PHYSIOLOGY • Volume 26 • February 2011 • www.physiologyonline.org ble for generating HNE from -6 PUFAs. Consequently, HNE-His epitopes would develop around preexisting amyloid plaques, not within them. A second possibility is that A-specific antibody epitopes are masked by HNE modification, as observed in vitro for 4G8 and 6E10 epitopes (231). A third possibility is that A fibrils induced to form by HNE modification have relatively sparse HNEHis epitopes (as suggested by FIGURE 2), yielding sparse fluorescence among fibrils. The fluorescence of HNE-11S seen in FIGURE 3 may be to HNE produced in the plaque but bound to HNEHis adducts in proteins other than A proteins. Some investigators have focused on the role of acrolein in the pathogenesis of AD. Acrolein is a well known environmental toxin and a recently recognized product of lipid peroxidation (324, 326, 327). It reacts spontaneously with Lys residue side chains, forming a cyclic Nε-(3-formyl-3,4-dehydropiperidino) derivative that has been considered a biomarker for measuring oxidative stress in AD (52). Acrolein is elevated in AD brain, it appears to be more neurotoxic than HNE, it causes elevated intracellular calcium levels (192, 342), and it appears to inactivate flippase, inducing a breakdown of lipid membrane asymmetry and apoptosis (1, 59). The Membrane as Victim Although the foregoing discussion suggests that AD may be caused by membrane-derived neurotoxic agents, a contrasting view is that AD is due to FIGURE 2. Electron micrograph of fibrils induced by HNE modification A42 was induced to fibrillize with HNE, then treated with mouse anti-His-HNE, and gold-tagged anti-mouse antibody. The focus in this image is on the gold particles, but various fibril morphologies are evident, and the gold particles making anti-HNE-His antibodies are preferentially associated with long, relatively straight fibils. Downloaded from http://physiologyonline.physiology.org/ by 10.220.32.247 on June 15, 2017 undergo spontaneous (nonenzymatic) decomposition, and -6 PUFA chains yield reactive ␣,-unsaturated aldehydes such as 4-oxo-2(E)-nonenal (180) and 4-hydroxy-2(E)-nonenal (HNE) (97, 98), as well as eicosanoids such as isoprostanes (225, 226). The prooxidant activity of A proteins mentioned above can catalyze the formation of HNE from -6 PUFAs in the presence of copper ions (232). Isoprostanes are relatively unreactive compounds that have been used as biomarkers of oxidative stress (179, 221, 244, 268). Some reports suggest that isoprostanes are specifically elevated in AD (253, 255, 256), although these findings have not been confirmed by all investigators (221, 357). Analogous products derived from -3 PUFA chains have been dubbed “neuroprostanes” and also have been put forward as indexes of oxidative stress in the brain (14, 266, 267, 298). Compared with isoprostanes, HNE is chemically reactive, with a well known propensity to form adducts with the side chains of various amino acid residues (37, 98, 328). For this reason, HNE-protein adducts have also been used as biomarkers of oxidative stress (325). HNE concentrations in human ventricular fluid are ⬃15 M and are elevated in AD (190, 203, 210). HNE modification is also known to inhibit proteasome function (286) and glutamate transport in synaptosomes (177). Together with the observation that immunoreactivity of antibodies to HNE-modified His residues localizes to amyloid plaques (7, 294), these observations suggest that A proteins not only promote lipid oxidation but that there may also be a mechanistic link between the lipid oxidation products formed during oxidative stress and A misfolding (161). A proteins increase HNE production from PUFA chains in vitro that, in turn, causes covalent modification of the three His residues in A proteins and fibril formation (231). These modifications promote the aggregation of A proteins into fibrils (FIGURE 2) (165, 231, 232). Moreover, they increase the ability of A42 to seed fibril formation by unmodified A40 (166). The effects of HNE on A fibril formation depend on the size or hydrophobicity of the modification because the corresponding analog from -3 PUFA chains, 4-hydroxy-2(E)-hexenal, does not have this effect (187). The addition of an octanoyl group to specific Lys residues of A proteins also appears to have a pro-amyloidogenic effect (258). In vivo, HNE-His epitopes are concentrated in the vicinity of amyloid plaques, but they do not precisely co-localize with the plaques (FIGURE 3). One possible explanation for this distribution is that the presence of HNE-His adducts and Cu-His complexes in the same protein molecule are mutually exclusive. Presumably, the formation of CuHis complexes precedes the generation of HNE and HNE-His adducts, if indeed they are responsi- REVIEWS toxic properties of A proteins on a membrane depends on the extent to which it has aggregated into oligomers and that this extent is concentration dependent (276). Model structures of the purported channels have been patterned after -barrel poreforming toxins (8, 93). This comparison is suggested not only by the EM/AFM images but by the reactivity of A and ␣-hemolysin with so-called “conformation-specific” antibodies (354). Recent studies confirming the formation of zinc-sensitive ion channels have also exposed the potential for artifact due to residual amounts of halogenated solvent in the A protein samples (56). It may be significant that truncated A peptides that are unable to form fibrils can nevertheless induce ion permeability (142) and that membranes formed from highly compressible lipids are most sensitive to A-induced changes in permeability (297). It has been suggested that channel openings are merely protein-induced defects in the bilayer structure or organization that heal after a time, giving the appearance of a transient channel opening (114). This mechanism would be consistent with oligomer-induced membrane thinning (297) and would help resolve the paradoxical appearance of many simultaneous pore structures in membranes that exhibit only single channel conductances (96). In living cells, as opposed to synthetic systems, one must consider the possibility that A may profoundly affect the behavior of naturally occurring channels and transporters. For example, A42 increases HNE-modification of a glutamate transporter in synaptosomes (177). A oligomers have been implicated in causing a pathological calcium influx through hippocampal NMDA receptors, followed by the activation of calpain and the degradation of dynamic 1-a GTPase involved in synaptic vesicle recycling (155). A proteins have also been shown to depress the surface concentration of AMPA receptors involved in calcium regulation at Downloaded from http://physiologyonline.physiology.org/ by 10.220.32.247 on June 15, 2017 physical attacks on the barrier function of membranes (265). For example, A proteins or their fragments have been observed to penetrate the membrane surface (82, 94), disrupt raft-like domains (67), cross the membrane (341), induce isotropic phases (176), increase the permeability of membranes to various materials (154, 344), cause physical thinning (81), decrease the mobility of hydrophobic membrane probes (169), activate phospholipase A2 (182), and promote membrane fusion (81, 249). Membrane binding by A proteins appears to mediate some forms of neurotoxicity (21, 70, 316). Plasma membranes isolated from human brain accelerate A fibrillogenesis (339), whereas fibrillizing A proteins disrupt the structure of membranes formed from both synthetic lipids (168, 169) and whole-brain lipid extracts (353). The action of A proteins on membranes has been compared with the action of antimicrobial peptides, and homogenates of brain with AD have elevated antimicrobial activity (299). Among the effects of A proteins on membranes, however, the formation of ion channels has received the most attention (10 –12, 93, 147, 186, 251). A proteins share an ability to induce channel-like activity in membranes with a wide variety of other amyloid-forming proteins (259). In the case of A, the channels exhibit only modest cation selectivity but very long lifetimes. A cation channels can be blocked by Zn2⫹, suggesting the possibility that they may be therapeutic targets (9), and small molecule inhibitors of the A calcium channel have been described (88). Ring-like structures possibly representing these pores or channels have been observed in membranes by AFM (173, 186, 259) and EM (174, 175). Although such features are not always observed with A proteins (114, 341), there are many reports suggesting that they are formed by other amyloidogenic proteins such as the insulin-associated polypeptide, ␣-synuclein, and serum amyloid A protein (259). It has been suggested that the channel-forming FIGURE 3. Immunofluorescent staining of the posterior parietal association area in a transgenic mouse model of Alzheimer’s disease that expressed amyloid precursor protein with the “Swedish” K670N/M671L mutation, and presenilin 1 with the M146L mutation A: 2H4 antibodies (Covance) specific for the amino terminus A proteins (green). B: HNE 11S specific for HNE-His adducts (red). C: A and B superimposed. Possible reasons for the close association of HNE-His epitopes and A proteins, but not precise colocalization, are discussed in the text. PHYSIOLOGY • Volume 26 • February 2011 • www.physiologyonline.org 59 REVIEWS the synapse (133, 188). The dysregulation of calcium has long been associated with AD pathogenesis (172) and is thought to be involved with the accumulation of amyloid deposits (85, 208, 209) and the hyperphosphorylation of tau (25). Calcium also promotes the conversion of oligomeric A to fibrils (140). An extensive literature exists on the role of mitochondria in AD pathogenesis, and the accumulation of calcium by mitochondria followed by damage to the mitochondrial membrane structure is a prominent theme in this literature (131, 246, 262). The lipids in nascent lipoprotein particles are arranged in a membrane-like bilayer, surrounded by apolipoprotein molecules in a configuration often called the “belt” model (FIGURE 4) (280). Apolipoprotein E (ApoE) is a focus of considerable interest because its isoforms are strongly associated with the risk of developing AD. In plasma, ApoE is found with other proteins in lipoprotein particles as diverse as chylomicrons and high-density lipoproteins. In the brain and cerebrospinal fluid, ApoE is the most abundant apolipoprotein and is found in particles that resemble high-density lipoproteins in both density and size (269). Among the three common isoforms, ApoE3 is the most common (77% of the alleles) and is therefore considered to be the wild type. ApoE2 has an R158C substitution, whereas ApoE4 has a C112R substitution, and both are associated with forms of hyperlipidemia (197). One copy of the ApoE4 gene confers a threefold increased risk of Alzheimer’s disease, whereas two FIGURE 4. Nascent lipoprotein E particles consist of ␣-helical “belts” around the perimeter of a lipid bilayer disk For this arrangement and the number of protein and lipid molecules in a particle, there is excess protein, which may situate across the face of the disk. When the protein is apoE3, there is one thiol group for every 45 lipids, concentrating a large antioxidant capacity in close proximity to the lipids. 60 PHYSIOLOGY • Volume 26 • February 2011 • www.physiologyonline.org Toward a Comprehensive Theory of AD Pathogenesis The cause of AD is known in cases of familial disease, but that knowledge has not clarified how sporadic disease develops, nor has it so far yielded an effective therapy for either form of the disease. Clearly, we need a more detailed theory of AD Downloaded from http://physiologyonline.physiology.org/ by 10.220.32.247 on June 15, 2017 The Lipids Associated With Apolipoprotein E copies confer an eightfold increased risk. One copy of the ApoE2 gene, however, reduces the risk by 60% (73). In addition to the epidemiological evidence, there is an abundance of experimental evidence linking ApoE to the pathogenesis of Alzheimer’s disease. For example, the ApoE4 allele is associated with increased A deposits in the brain, and a distinct neuropathological phenotype (278), whereas a lack of ApoE reduces A deposition in mice (19). Amyloid plaques bind anti-ApoE antibodies, suggesting that ApoE is present in these plaques (3). Indeed, ApoE copurifies with A from amyloid plaques (26) and may exist as a bound complex with A proteins (245, 349). Some have suggested that ApoE4 accelerates fibril formation by A40 (18, 194, 271, 343), but its behavior in this regard may depend on whether it is monomeric or dimeric. Others have suggested that dimeric forms inhibit fibril formation and that ApoE3 is much more effective at doing this because a large fraction circulates as a disulfide-linked dimer, whereas ApoE4 cannot form disulfide bonded dimers due to its C112R substitution (99, 340). Despite all of these observations, the reason that different isoforms of ApoE have different levels of risk for AD is not known. There are no isoform-dependent differences in the apparent structure of lipoprotein particles (280). A case for isoform-specific direct interactions between ApoE and A proteins has been made (233), but clear conclusions are elusive due to problems with protein purity, aggregation and denaturation of the ApoE protein, and indirect assay methods (4, 171, 198, 245, 303, 307). Others have suggested that risk of AD with ApoE isoforms may be related to differences in antioxidant activity (178, 217, 312). ApoE4 has no Cys residues and, hence, no free thiol groups; ApoE3 has one Cys, whereas ApoE2 has two. Free thiol groups have significant antioxidant activity via mechanisms that differ from those of glutathione (109, 333, 359). In apoA-I, variants with a free Cys residue side chain exhibit significantly greater antioxidant activity than variants without a free Cys residue (29). Therefore, it is intriguing to speculate that ApoE4 confers increased risk of AD, whereas ApoE2 confers decreased risk, because Cys residue side chains protect lipids in lipoprotein E particles against oxidative stress. REVIEWS No conflicts of interest, financial or otherwise, are declared by the author(s). FIGURE 5. Membrane-mediated amplification of fibrillogenesis, illustrating possible relationships between meachanisms involved in A protein aggregation and neurotoxic mechanisms involved in the pathogenesis of Alzheimer’s disease Lipid oxidation products modify the three His residues of A42, increasing its membrane affinity and accelerating the conversion of A40 into oligomers and fibrils. Oligomeric A proteins bind copper ions while they undergo redox cycling. Highly reactive oxygen species may be generated by electrons from copper or as by-products of inflammation, including inflammation induced by trauma. ApoE4 alleles lack thiol-mediated antioxidant activity and may allow excess oxidative damage to the lipids in lipoprotein particles. Aging by itself is associated with reduced tissue antioxidant levels and accumulated oxidative lipid damage. During any or all of these processes, direct neurotoxins may be produced, and A proteins may form pores, channels, or other disruptive neurotoxic structures in neuronal membranes. The authors are supported by grants from the National Institute on Aging, the Alzheimer’s Association, and the American Health Assistance Foundation. References 1. Abdul HM, Butterfield DA. Protection against amyloid betapeptide (1-42)-induced loss of phospholipid asymmetry in synaptosomal membranes by tricyclodecan-9-xanthogenate (D609) and ferulic acid ethyl ester: implications for Alzheimer’s disease. BBA Mol Basis Dis 1741: 140 –148, 2005. 2. Aisenbrey C, Borowik T, Bystrom R, Bokvist M, Lindstrom F, Misiak H, Sani MA, Grobner G. How is protein aggregation in amyloidogenic diseases modulated by biological membranes? Eur Biophys J Biophys Lett 37: 247–255, 2008. 3. Aizawa Y, Fukatsu R, Takamaru Y, Tsuzuki K, Chiba H, Kobayashi K, Fujii N, Takahata N. Amino-terminus truncated apolipoprotein E is the major species in amyloid deposits in Alzheimer’s disease affected brains: a possible role for apolipoprotein E in Alzheimer’s disease. Brain Res 768: 208 –214, 1997. 4. Aleshkov S, Abraham CR, Zannis VI. Interaction of nascent ApoE2, ApoE3, and ApoE4 isoforms expressed in mammalian cells with amyloid peptide beta (1– 40). Relevance to Alzheimer’s disease. Biochemistry 36: 10571–10580, 1997. 5. Ali FE, Separovic F, Barrow CJ, Cherny RA, Fraser F, Bush AI, Masters CL, Barnham KJ. Methionine regulates copper/hydrogen peroxide oxidation products of A beta. J Pept Sci 11: 353–360, 2005. 6. Ali FE, Separovic F, Barrow CJ, Yao SG, Barnham KJ. Copper and zinc mediated oligomerisation of A beta peptides. Int J Pept Res Ther 12: 153–164, 2006. 7. Ando Y, Brannstrom T, Uchida K, Nyhlin N, Nasman B, Suhr O, Yamashita T, Olsson T, El Salhy M, Uchino M, Ando M. Histochemical detection of 4-hydroxynonenal protein in Alzheimer amyloid. J Neurol Sci 156: 172–176, 1998. 8. Arispe N. Architecture of the Alzheimer’s A beta P ion channel pore. J Membrane Biol 197: 33– 48, 2004. PHYSIOLOGY • Volume 26 • February 2011 • www.physiologyonline.org 61 Downloaded from http://physiologyonline.physiology.org/ by 10.220.32.247 on June 15, 2017 pathogenesis, and it seems likely that lipid membranes will have a prominent role in any such theory. As summarized above, the interactions between lipid membranes and A proteins are bidirectional: lipids damage A proteins, and A proteins damage lipid membranes. These processes can operate in tandem to accelerate fibril formation in human brain lipid extracts (231). Even if fibril formation is only an inert by-product of the disease-causing process, it is nonetheless a pathognomonic finding of AD. Therefore, it is vital to understand how fibrils form. As illustrated in FIGURE 5, the interaction of lipid membranes may constitute an amplification system for fibril formation. A proteins in vitro only form fibrils at micromolar concentrations and after days of incubation, whereas membranes containing PUFA-chains lower the protein concentration requirement by three orders of magnitude and shorten the time required to minutes (165, 166). The same system may also amplify multiple mechanisms of neurotoxicity that operate independently of fibril formation and link many of the seemingly unrelated observations reviewed above. For example, inflammation due to trauma or other factors will promote oxidative stress and the production of reactive oxygen species that exert direct neurotoxicity or lipid damage and A protein aggregation. Lipid oxidation products may exert direct toxicity. ApoE4 proteins are deficient in thiol-mediated antioxidant activity; this deficiency would allow excess oxidative damage to the lipids in lipoprotein particles that likewise promote A protein aggregation. Aging is associated with reduced tissue antioxidant levels, accumulated oxidative lipid damage, and low levels of adventitial A protein aggregation, with each process promoting further A protein aggregation. Various aggregated forms of A protein may form pores, channels, or other neurotoxic structures in neuronal membranes. It is not yet clear whether all cases of AD arise through the operation of one primary pathogenic mechanism that diverges only at a late stage into various subtypes or whether disparate mechanisms operate from the beginning. For example, neurofibrillary tangles of tau protein (20, 322) occur in only 70 – 80% of cases of AD (122), suggesting that tangles reflect a response to some but not all pathogenic paths. In any case, one or more additional factors must be incorporated into the amyloid hypothesis to explain the pathogenesis of AD, and confronting the experimental challenges presented by lipids and membranes may be necessary to identify such factors. 䡲 REVIEWS 9. Arispe N, Diaz JC, Simakova OA.  Ion channels. Prospects for treating Alzheimer’s disease with A channel blockers. BBA Biomembranes 1768: 1952–1965, 2007. 10. Arispe N, Pollard HB, Rojas E. Giant multilevel cation channels formed by Alzheimer-disease amyloid beta-protein [A-Beta-P-(1-40)] in bilayermembranes. Proc Natl Acad Sci USA 90: 10573– 10577, 1993. 11. Arispe N, Pollard HB, Rojas E. Zn2⫹ interaction with Alzheimer amyloid beta protein calcium channels. Proc Natl Acad Sci USA 93: 1710 –1715, 1996. 12. Arispe N, Rojas E, Pollard HB. Alzheimer-disease amyloid beta-protein forms calcium channels in bilayer-membranes: blockade by tromethamine and aluminum. Proc Natl Acad Sci USA 90: 567– 571, 1993. 26. Baumann MH, Kallijarvi J, Lankinen H, Soto C, Haltia M. Apolipoprotein E includes a binding site which is recognized by several amyloidogenic polypeptides. Biochem J 349: 77– 84, 2000. 27. Behl C, Davis JB, Lesley R, Schubert D. Hydrogen peroxide mediates amyloid beta protein toxicity. Cell 77: 817– 827, 1994. 28. Berthon G. Does human beta A4 exert a protective function against oxidative stress in Alzheimer’s disease? Med Hypotheses 54: 672– 677, 2000. 29. Bielicki JK, Oda MN. Apolipoprotein A-I-Milano and apolipoprotein A-I-Paris exhibit an antioxidant activity distinct from that of wild-type apolipoprotein A-I. Biochemistry 41: 2089 –2096, 2002. 14. Arneson KO, Roberts LJ. Measurement of products of docosahexaenoic acid peroxidation, neuroprostanes, and neurofurans. Lipidomics Bioactive Lipids 433: 127–143, 2007. 30. Bieschke J, Zhang Q, Powers ET, Lerner RA, Kelly JW. Oxidative metabolites accelerate Alzheimer’s amyloidogenesis by a two-step mechanism, eliminating the requirement for nucleation. Biochemistry 44: 4977– 4983, 2005. 15. Atwood CS, Huang XD, Khatri A, Scarpa RC, Kim YS, Moir RD, Tanzi RE, Roher AE, Bush AI. Copper catalyzed oxidation of alzheimer A beta. Cell Mol Biol 46: 777–783, 2000. 31. Bishop GM, Robinson SR. The amyloid paradox: amyloid-beta-metal complexes can be neurotoxic and neuroprotective. Brain Pathol 14: 448 – 452, 2004. 16. Atwood CS, Obrenovich ME, Liu TB, Chan H, Perry G, Smith MA, Martins RN. Amyloid-beta: a chameleon walking in two worlds: a review of the trophic and toxic properties of amyloid-beta. Brain Res Rev 43: 1–16, 2003. 32. Bitan G, Tarus B, Vollers SS, Lashuel HA, Condron MM, Straub JE, Teplow DB. A molecular switch in amyloid assembly: Met(35) and amyloid beta-protein oligomerization. J Am Chem Soc 125: 15359 –15365, 2003. 17. Atwood CS, Perry G, Zeng H, Kato Y, Jones WD, Ling KQ, Huang XD, Moir RD, Wang DD, Sayre LM, Smith MA, Chen SG, Bush AI. Copper mediates dityrosine cross-linking of Alzheimer’s amyloid-beta. Biochemistry 43: 560 –568, 2004. 33. Bokvist M, Lindstrom F, Watts A, Grobner G. Two types of Alzheimer’s beta-amyloid (1-40) peptide membrane interactions: aggregation preventing transmembrane anchoring versus accelerated surface fibril formation. J Mol Biol 335: 1039 –1049, 2004. 18. Bales KR, Verina T, Cummins DJ, Du YS, Dodel TC, Saura J, Fishman CE, DeLong CA, Piccardo P, Petegnief V, Ghetti B, Paul SM. Apolipoprotein E is essential for amyloid deposition in the APP(V717F) transgenic mouse model of Alzheimer’s disease. Proc Natl Acad Sci USA 96: 15233–15238, 1999. 19. Bales KR, Verina T, Dodel RC, Du YS, Altstiel L, Bender M, Hyslop P, Johnstone EM, Little SP, Cummins DJ, Piccardo P, Ghetti B, Paul SM. Lack of apolipoprotein E dramatically reduces amyloid beta- peptide deposition. Nat Gen 17: 263–264, 1997. 20. Ballatore C, Lee VMY, Trojanowski JQ. Tau-mediated neurodegeneration in Alzheimer’s disease and related disorders. Nat Rev Neurosci 8: 663– 672, 2007. 21. Barnham KJ, Ciccotosto GD, Tickler AK, Ali FE, Smith DG, Williamson NA, Lam YH, Carrington D, Tew D, Kocak G, Volitakis I, Separovic F, Barrow CJ, Wade JD, Masters CL, Cherny RA, Curtain CC, Bush AI, Cappai R. Neurotoxic, redox-competent Alzheimer’s beta-amyloid is released from lipid membrane by methionine oxidation. J Biol Chem 278: 42959 – 42965, 2003. 22. Barnham KJ, Haeffner F, Ciccotosto GD, Curtain CC, Tew D, Beyreuther K, Carrington D, Masters CL, Cherny RA, Cappai R, Bush AI. Tyrosine gated electron transfer is key to the toxic mechanism of Alzheimer’s disease -amyloid. FASEB J 18: 1427–1429, 2004. 23. Baruch-Suchodolsky R, Fischer B. Soluble amyloid beta(1-28)-copper(I)/copper(II)/iron(II) complexes are potent antioxidants in cell-free systems. Biochemistry 47: 7796 –7806, 2008. 24. Baruch-Suchodolsky R, Fischer B. A40, either soluble or aggregated, is a remarkably potent antioxidant in cell-free oxidative systems. Biochemistry 48: 4354 – 4370, 2009. 62 34. Boyd-Kimball D, Castegna A, Sultana R, Poon HF, Petroze R, Lynn BC, Klein JB, Butterfield DA. Proteomic identification of proteins oxidized by A beta(1-42) in synaptosomes: implications for Alzheimer’s disease. Brain Res 1044: 206 –215, 2005. 35. Brezesinski G, Maltseva E, Mohwald H. Adsorption of amyloid beta (1-40) peptide at liquid interfaces. Z Phys Chem 221: 95–111, 2007. 36. Brosche T, Platt D. Mini-review: The biological significance of plasmalogens in defense against oxidative damage. Exp Gerontol 33: 363–369, 1998. 37. Bruenner BA, Jones AD, German JB. Direct characterization of protein adducts of the lipid-peroxidation product 4-hydroxy-2-nonenal using electrospray mass-spectrometry. Chem Res Tox 8: 552–559, 1995. 38. Bryleva EY, Rogers MA, Chang CCY, Buen F, Harris BT, Rousselet E, Seidah NG, Oddo S, LaFerla FM, Spencer TA, Hickey WF, Chang TY. ACAT1 gene ablation increases 24(S)-hydroxycholesterol content in the brain and ameliorates amyloid pathology in mice with AD. Proc Natl Acad Sci USA 107: 3081–3086, 2010. 39. Bush AI. The metallobiology of Alzheimer’s disease. Trends Neurosci 26: 207–214, 2003. 40. Butterfield DA. Amyloid beta-peptide (1-42)-induced oxidative stress and neurotoxicity: implications for neurodegeneration in Alzheimer’s disease brain. A review. Free Radic Res 36: 1307– 1313, 2002. 41. Butterfield DA. Proteomics: a new approach to investigate oxidative stress in Alzheimer’s disease brain. Brain Res 1000: 1–7, 2004. PHYSIOLOGY • Volume 26 • February 2011 • www.physiologyonline.org 42. Butterfield DA, Boyd-Kimball D. Amyloid betapeptide(1-42) contributes to the oxidative stress and neurodegeneration found in Alzheimer disease brain. Brain Pathol 14: 426 – 432, 2004. 43. Butterfield DA, Boyd-Kimball D. The critical role of methionine 35 in Alzheimer’s amyloid-betapeptide (1-42)-induced oxidative stress and neurotoxicity. Biochim Biophys Acta 1703: 149 –156, 2005. 44. Butterfield DA, Boyd-Kimball D, Castegna A. Proteomics in Alzheimer’s disease: insights into potential mechanisms of neurodegeneration. J Neurochem 86: 1313–1327, 2003. 45. Butterfield DA, Bush AI. Alzheimer’s amyloid beta-peptide (1-42): involvement of methionine residue 35 in the oxidative stress and neurotoxicity properties of this peptide. Neurobiol Aging 25: 563–568, 2004. 46. Butterfield DA, Castegna A, Lauderback CM, Drake J. Evidence that amyloid beta-peptide-induced lipid peroxidation and its sequelae in Alzheimer’s disease brain contribute to neuronal death. Neurobiol Aging 23: 655– 664, 2002. 47. Butterfield DA, Galvan V, Lange MB, Tang HD, Sowell RA, Spilman P, Fombonne J, Gorostiza O, Zhang JL, Sultana R, Bredesen DE. In vivo oxidative stress in brain of Alzheimer disease transgenic mice: requirement for methionine 35 in amyloid beta-peptide of APP. Free Radic Biol Med 48: 136 –144, 2010. 48. Butterfield DA, Hensley K, Harris M, Mattson MP, Carney JM. Beta-amyloid peptide free-radical fragments initiate synaptosomal lipoperoxidation in a sequence-specific fashion: implications to Alzheimers-disease. Biochem Biophys Res Commun 200: 710 –715, 1994. 49. Butterfield DA, Kanski J. Methionine residue 35 is critical for the oxidative stress and neurotoxic properties of Alzheimer’s amyloid beta-peptide 1-42. Peptides 23: 1299 –1309, 2002. 50. Butterfield DA, Lauderback CM. Lipid peroxidation and protein oxidation in Alzheimer’s disease brain: potential causes and consequences involving amyloid beta-peptide-associated free radical oxidative stress. Free Radic Biol Med 32: 1050 – 1060, 2002. 51. Butterfield DA, Reed T, Newman SF, Sultana R. Roles of amyloid beta-peptide-associated oxidative stress and brain protein modifications in the pathogenesis of Alzheimer’s disease and mild cognitive impairment. Free Radic Biol Med 43: 658 – 677, 2007. 52. Calingasan NY, Uchida K, Gibson GE. Proteinbound acrolein: a novel marker of oxidative stress in Alzheimer’s disease. J Neurochem 72: 751–756, 1999. 53. Calon F, Cole G. Neuroprotective action of omega-3 polyunsaturated fatty acids against neurodegenerative diseases: evidence from animal studies. Prost Leuk Essen Fatty Acids 77: 287–293, 2007. 54. Calon F, Lim GP, Morihara T, Yang FS, Ubeda O, Salem N, Frautschy SA, Cole GM. Dietary n-3 polyunsaturated fatty acid depletion activates caspases and decreases NMDA receptors in the brain of a transgenic mouse model of Alzheimer’s disease. Eur J Neurosci 22: 617– 626, 2005. 55. Calon F, Lim GP, Yang FS, Morihara T, Teter B, Ubeda O, Rostaing P, Triller A, Salem N, Ashe KH, Frautschy SA, Cole GM. Docosahexaenoic acid protects from dendritic pathology in an Alzheimer’s disease mouse model. Neuron 43: 633– 645, 2004. 56. Capone R, Quiroz FG, Prangkio P, Saluja I, Sauer AM, Bautista MR, Turner RS, Yang J, Mayer M. Amyloid-beta-induced ion flux in artificial lipid bilayers and neuronal cells: resolving a controversy. Neurotox Res 16: 1–13, 2009. Downloaded from http://physiologyonline.physiology.org/ by 10.220.32.247 on June 15, 2017 13. Arlt S, Beisiegel U, Kontush A. Lipid peroxidation in neurodegeneration: new insights into Alzheimer’s disease. Curr Opin Lipid 13: 289 –294, 2002. 25. Baudier J, Cole RD. Phosphorylation of tau-proteins to a state like that in Alzheimers brain is catalyzed by a calcium calmodulin-dependent kinase and modulated by phospholipids. J Biol Chem 262: 17577–17583, 1987. REVIEWS 57. Castegna A, Aksenov M, Aksenova M, Thongboonkerd V, Klein JB, Pierce WM, Booze R, Markesbery WR, Butterfield DA. Proteomic identification of oxidatively modified proteins in Alzheimer’s disease brain. Part 1: creatine kinase bb, glutamine synthase, and ubiquitin carboxy-terminal hydrolase L-1. Free Radic Biol Med 33: 562– 571, 2002. 58. Castegna A, Aksenov M, Thongboonkerd V, Klein JB, Pierce WM, Booze R, Markesbery WR, Butterfield DA. Proteomic identification of oxidatively modified proteins in Alzheimer’s disease brain. Part II: dihydropyrimidinase-related protein 2, alpha-enolase and heat shock cognate 71. J Neurochem 82: 1524 –1532, 2002. 59. Castegna A, Lauderback CM, Mohmmad-Abdul H, Butterfield DA. Modulation of phospholipid asymmetry in synaptosomal membranes by the lipid peroxidation products, 4-hydroxynonenal and acrolein: implications for Alzheimer’s disease. Brain Res 1004: 193–197, 2004. 61. Castellani RJ, Perry G, Harris PLR, Cohen ML, Sayre LM, Salomon RG, Smith MA. Advanced lipid peroxidation end-products in Alexander’s disease. Brain Res 787: 15–18, 1998. 62. Caughey B, Lansbury PT. Protofibrils, pores, fibrils, and neurodegeneration: separating the responsible protein aggregates from the innocent bystanders. Ann Rev Neurosci 26: 267–298, 2003. 63. Chauhan A, Ray I, Chauhan VPS. Interaction of amyloid beta-protein with anionic phospholipids: possible involvement of Lys(28) and C-terminus aliphatic amino acids. Neurochem Res 25: 423– 429, 2000. 64. Cherny RA, Atwood CS, Xilinas ME, Gray DN, Jones WD, Mclean CA, Barnham KJ, Volitakis I, Fraser FW, Kim YS, Huang XD, Goldstein LE, Moir RD, Lim JT, Beyreuther K, Zheng H, Tanzi RE, Masters CL, Bush AI. Treatment with a copper-zinc chelator markedly and rapidly inhibits beta-amyloid accumulation in Alzheimer’s disease transgenic mice. Neuron 30: 665– 676, 2001. 65. Cherny RA, Legg JT, Mclean CA, Fairlie DP, Huang XD, Atwood CS, Beyreuther K, Tanzi RE, Masters CL, Bush AI. Aqueous dissolution of Alzheimer’s disease A beta amyloid deposits by biometal depletion. J Biol Chem 274: 23223–23228, 1999. 66. Chi EY, Ege C, Winans A, Majewski J, Wu GH, Kjaer K, Lee KYC. Lipid membrane templates the ordering and induces the fibrillogenesis of Alzheimer’s disease amyloid-beta peptide. Proteins 72: 1–24, 2008. 67. Chi EY, Frey SL, Lee KYC. Ganglioside GM1mediated amyloid-beta fibrillogenesis and membrane disruption. Biochemistry 46: 1913–1924, 2007. 68. Choo-Smith LP, Garzon-Rodriguez W, Glabe CG, Surewicz WK. Acceleration of amyloid fibril formation by specific binding of Abeta-(1-40) peptide to ganglioside-containing membrane vesicles. J Biol Chem 272: 22987–22990, 1997. 69. Choo-Smith LP, Surewicz WK. The interaction between Alzheimer amyloid beta(1-40) peptide and ganglioside GM1-containing membranes. FEBS Lett 402: 95–98, 1997. 70. Ciccotosto GD, Tew D, Curtain CC, smith D, Carrington D, Masters CL, Bush AI, Cherny RA, Cappai R, Barnham KJ. Enhanced toxicity and cellular binding of a modified amyloid beta peptide with a methionine to valine substitution. J Biol Chem 279: 28425– 42538, 2004. 86. Deshpande A, Kawai H, Metherate R, Glabe CG, Busciglio J. A role for synaptic zinc in activitydependent A beta oligomer formation and accumulation at excitatory synapses. J Neurosci 29: 4004 – 4015, 2009. 72. Cleary JP, Walsh DM, Hofmeister JJ, Shankar GM, Kuskowski MA, Selkoe DJ, Ashe KH. Natural oligomers of the amyloid-protein specifically disrupt cognitive function. Nat Neurosci 8: 79 – 84, 2005. 87. Devanathan S, Salamon Z, Lindblom G, Grobner G, Tollin G. Effects of sphingomyelin, cholesterol and zinc ions on the binding, insertion and aggregation of the amyloid A beta(1-40) peptide in solid-supported lipid bilayers. FEBS J 273: 1389 – 1402, 2006. 73. Corder EH, Saunders AM, Strittmatter WJ, Schmechel DE, Gaskell PC, Small GW, Roses AD, Haines JL, Pericakvance MA. Gene dose of apolipoprotein-E type-4 allele and the risk of Alzheimers-disease in late-onset families. Science 261: 921–923, 1993. 74. Cordy JM, Hooper NM, Turner AJ. The involvement of lipid rafts in Alzheimer’s disease. Mol Membr Biol 23: 111–122, 2006. 75. Cuajungco MP, Goldstein LE, Nunomura A, Smith MA, Lim JT, Atwood CS, Huang X, Farrag YW, Perry G, Bush AI. Evidence that the -amyloid plaques of Alzheimer’s disease represent the redox-silencing and entombment of abeta by zinc. J Biol Chem 275: 19439 –19442, 2000. 76. Curtain CC, Ali F, Volitakis I, Cherny RA, Norton RS, Beyreuther K, Barrow CJ, Masters CL, Bush AI, Barnham KJ. Alzheimer’s eisease amyloid-beta binds copper and zinc to generate an allosterically ordered membrane-penetrating structure containing superoxide dismutase-like subunits. J Biol Chem 276: 20466 –20473, 2001. 77. Curtain CC, Ali FE, Smith DG, Bush AI, Masters CL, Barnham KJ. Metal ions, pH, and cholesterol regulate the interactions of Alzheimer’s disease amyloid-beta peptide with membrane lipid. J Biol Chem 278: 2977–2982, 2003. 78. Cutler RG, Kelly J, Storie K, Pedersen WA, Tammara A, Hatanpaa K, Troncoso JC, Mattson MP. Involvement of oxidative stress-induced abnormalities in ceramide and cholesterol metabolism in brain aging and Alzheimer’s disease. Proc Natl Acad Sci USA 101: 2070 –2075, 2004. 79. D’Errico G, Vitiello G, Ortona O, Tedeschi A, Ramunno A, D’Ursi AM. Interaction between Alzheimer’s A beta(25-35) peptide and phospholipid bilayers: the role of cholesterol. Biochim Biophys Acta 1778: 2710 –2716, 2008. 80. Dalle-Donne I, Rossi R, Giustarini D, Gagliano N, Lusini L, Milzani A, Di Simplicio P, Colombo R. Actin carbonylation: from a simple marker of protein oxidation to relevant signs of severe functional impairment. Free Radic Biol Med 31: 1075– 1083, 2001. 81. Dante S, Hauss T, Brandt A, Dencher NA. Membrane fusogenic activity of the Alzheimer’s peptide A beta(1-42) demonstrated by small-angle neutron scattering. J Mol Biol 376: 393– 404, 2008. 88. Diaz JC, Simakova O, Jacobson KA, Arispe N, Pollard HB. Small molecule blockers of the Alzheimer A beta calcium channel potently protect neurons from A beta cytotoxicity. Proc Natl Acad Sci USA 106: 3348 –3353, 2009. 89. Dikalov SI, Vitek MP, Maples KR, Mason RP. Amyloid beta peptides do not form peptide-derived free radicals spontaneously, but can enhance metal-catalyzed oxidation of hydroxylamines to nitroxides. J Biol Chem 274: 9392–9399, 1999. 90. Donnelly PS, Xiao ZG, Wedd AG. Copper and Alzheimer’s disease. Curr Opin Chem Biol 11: 128 –133, 2007. 91. Drake J, Link CD, Butterfield DA. Oxidative stress precedes fibrillar deposition of Alzheimer’s disease amyloid beta-peptide (1-42) in a transgenic Caenorhabditis elegans model. Neurobiol Aging 24: 415– 420, 2003. 92. Drew SC, Noble CJ, Masters CL, Hanson GR, Barnham KJ. Pleomorphic copper coordination by Alzheimer’s disease amyloid-beta peptide. J Am Chem Soc 131: 1195–1207, 2009. 93. Durell SR, Guy HR, Arispe N, Rojas E, Pollard HB. Theoretical-models of the ion-channel structure of amyloid beta-protein. Biophys J 67: 2137– 2145, 1994. 94. Ege C, Lee KYC. Insertion of Alzheimer’s A beta 40 peptide into lipid monolayers. Biophys J 87: 1732–1740, 2004. 95. Ehehalt R, Keller P, Haass C, Thiele C, Simons K. Amyloidogenic processing of the Alzheimer beta-amyloid precursor protein depends on lipid rafts. J Cell Biol 160: 113–123, 2003. 96. Eliezer D. Amyloid ion channels: a porous argument or a thin excuse? J Gen Physiol 128: 631– 633, 2006. 97. Esterbauer H, Benedetti A, LANGJ, , Fulceri R, Fauler G, Comporti M. Studies on the mechanism of formation of 4-hydroxynonenal during microsomal lipid-peroxidation. Biochim Biophys Acta 876: 154 –166, 1986. 98. Esterbauer H, Schaur RJ, Zollner H. Chemistry and biochemistry of 4-hydroxynonenal, malonaldehyde and related aldehydes. Free Radic Biol Med 11: 81–128, 1991. 82. Dante S, Hauss T, Dencher NA. Insertion of externally administered amyloid beta peptide 25-35 and perturbation of lipid bilayers. Biochemistry 42: 13667–13672, 2003. 99. Evans KC, Berger EP, Cho CG, Weisgraber KH, Lansbury PT. Apolipoprotein E is a kinetic but not a thermodynamic inhibitor of amyloid formation: implications for the pathogenesis and treatment of Alzheimer disease. Proc Natl Acad Sci USA 92: 763–767, 1995. 83. de Planque MRR, Raussens V, Contera SA, Rijkers DTS, Liskamp RMJ, Ruysschaert JM, Ryan JF, Separovic F, Watts A. beta-sheet structured beta-amyloid(1-40) perturbs phosphatidylcholine model membranes. J Mol Biol 368: 982–997, 2007. 100. Faller P, Hureau C. Bioinorganic chemistry of copper and zinc ions coordinated to amyloidbeta peptide. Dalton Trans 21: 1080 –1094, 2009. 84. DeMar JC, Ma KZ, Bell JM, Rapoport SI. Halflives of docosahexaenoic acid in rat brain phospholipids are prolonged by 15 weeks of nutritional deprivation of n-3 polyunsaturated fatty acids. J Neurochem 91: 1125–1137, 2004. 85. Demuro A, Parker I, Stutzmann GE. Calcium signaling and amyloid toxicity in Alzheimer’s disease. J Biol Chem 285: 12463–12468, 2010. 101. Farooqui AA, Horrocks LA. Plasmalogens: Workhorse lipids of membranes in normal and injured neurons and glia. Neuroscientist 7: 232–245, 2001. 102. Farooqui AA, Rapoport SI, Horrocks LA. Membrane phospholipid alterations in Alzheimer’s disease: Deficiency of ethanolamine plasmalogens. Neurochem Res 22: 523–527, 1997. 103. Friedland RP. Fish consumption and the risk of Alzheimer disease - Is it time to make dietary recommendations? Arch Neurol 60: 923–924, 2003. PHYSIOLOGY • Volume 26 • February 2011 • www.physiologyonline.org 63 Downloaded from http://physiologyonline.physiology.org/ by 10.220.32.247 on June 15, 2017 60. Castegna A, Thongboonkerd V, Klein JB, Lynn B, Markesbery WR, Butterfield DA. Proteomic identification of nitrated proteins in Alzheimer’s disease brain. J Neurochem 85: 1394 –1401, 2003. 71. Cirrito JR, Yamada KA, Finn MB, Sloviter RS, Bales KR, May PC, Schoepp DD, Paul SM, Mennerick S, Holtzman DM. Synaptic activity regulates interstitial fluid amyloid-beta levels in vivo. Neuron 48: 913–922, 2005. REVIEWS 104. Galbusera C, Facheris M, Magni F, Galimberti G, Sala G, Tremolada L, Isella V, Guerini FR, Appollonio I, Galli-Kienle M, Ferrarese C. Increased susceptibility to plasma lipid peroxidation in Alzheimer disease patients. Curr Alzheimer Res 1: 103–109, 2004. 105. Garzon-Rodriguez W, Yatsimirsky AK, Glabe CG. Binding of Zn(II), Cu(II), and Fe(II) ions to Alzheimer’s A beta peptide studied by fluorescence. Bioorg Med Chem Lett 9: 2243–2248, 1999. 106. Gehman JD, O’Brien CC, Shabanpoor F, Wade JD, Separovic F. Metal effects on the membrane interactions of amyloid-beta peptides. Eur Biophys J Biophys Lett 37: 333–344, 2008. 107. Ghezzi P, Bonetto V. Redox proteomics: Identification of oxidatively, modified proteins. Proteomics 3: 1145–1153, 2003. 109. Giles GI, Jacob C. Reactive sulfur species: an emerging concept in oxidative stress. Biol Chem 383: 375–388, 2002. 110. Ginsberg L, Rafique S, Xuereb JH, Rapoport SI, Gershfeld NL. Disease and anatomic specificity of ethanolamine plasmalogen deficiency in Alzheimers-disease brain. Brain Res 698: 223–226, 1995. 111. Ginsberg L, Xuereb JH, Gershfeld NL. Membrane instability, plasmalogen content, and Alzheimer’s disease. J Neurochem 70: 2533–2538, 1998. 112. Goodenowe DB, Cook LL, Liu J, Lu Y, Jayasinghe DA, Ahiahonu PWK, Heath D, Yamazaki Y, Flax J, Krenitsky KF, Sparks DL, Lerner A, Friedland RP, Kudo T, Kamino K, Morihara T, Takeda M, Wood PL. Peripheral ethanolamine plasmalogen deficiency: a logical causative factor in Alzheimer’s disease and dementia. J Lipid Res 48: 2485–2498, 2007. 113. Gorbenko GP, Kinnunen PKJ. The role of lipidprotein interactions in amyloid-type protein fibril formation. Chem Phys Lipids 141: 72– 82, 2006. 114. Green JD, Kreplak L, Goldsbury C, Blatter XL, Stolz M, Cooper GS, Seelig A, Kist-Ler J, Aebi U. Atomic force microscopy reveals defects within mica supported lipid bilayers induced by the amyloidogenic human amylin peptide. J Mol Biol 342: 877– 887, 2004. 122. Hansen LM, Masliah E, Galasko D, Terry RD. Plaque-only Alzheimer-disease is usually the Lewy body variant, and vice-versa. J Neuropath Exp Neurol 52: 648 – 654, 1993. 123. Hardy J, Allsop D. Amyloid deposition as the central event in the etiology of Alzheimers-disease. Trends Pharmacol Sci 12: 383–388, 1991. 124. Hardy JA, Higgins GA. Alzheimers-disease: the amyloid cascade hypothesis. Science 256: 184 – 185, 1992. 125. Harper JD, Wong SS, Lieber CM, Lansbury PT. Observation of metastable A beta amyloid protofibrils by atomic force microscopy. Chem Biol 4: 119 –125, 1997. 126. Hashimoto M, Tanabe Y, Fujii Y, Kikuta T, Shibata H, Shido O. Chronic administration of docosahexaenoic acid ameliorates the impairment of spatial cognition learning ability in amyloid betainfused rats. J Nutr 135: 549 –555, 2005. 127. Hayashi H, Kimura N, Yamaguchi H, Hasegawa K, Yokoseki T, Shibata M, Yamamoto N, Michikawa M, Yoshikawa Y, Terao K, Matsuzaki K, Lemere CA, Selkoe DJ, Naiki H, Yanagisawa K. A seed for Alzheimer amyloid in the brain. J Neurosci 24: 4894 – 4902, 2004. 128. Hensley K, Carney JM, Mattson MP, Aksenova M, Harris M, Wu JF, Floyd RA, Butterfield DA. A model for beta-amyloid aggregation and neurotoxicity based on free radical generation by the peptide: relevance to Alzheimer disease. Proc Natl Acad Sci USA 91: 3270 –3274, 1994. 129. Hensley K, Hall N, Subramaniam R, Cole P, Harris M, Aksenov M, Aksenova M, Gabbita SP, Wu JF, Carney JM, Lovell MA, Markesbery WR, Butterfield DA. Brain regional correspondence between Alzheimers-disease histopathology and biomarkers of protein oxidation. J Neurochem 65: 2146 –2156, 1995. 130. Hertel C, Terzi E, Hauser N, Jakob-Rotne R, Seelig J, Kemp JA. Inhibition of the electrostatic interaction between beta-amyloid peptide and membranes prevents beta-amyloid-induced toxicity. Proc Natl Acad Sci USA 94: 9412–9416, 1997. 136. Hung LW, Ciccotosto GD, Giannakis E, Tew DJ, Perez K, Masters CL, Cappai R, Wade JD, Barnham KJ. Amyloid-beta peptide (A beta) neurotoxicity is modulated by the rate of peptide aggregation: A beta dimers and trimers correlate with neurotoxicity. J Neurosci 28: 11950 –11958, 2008. 137. Hutter-Paier B, Huttunen HJ, Puglielli L, Eckman CB, Kim DY, Hofmeister A, Moir RD, Domnitz SB, Frosch MP, Windisch M, Kovacs DM. The ACAT inhibitor CP-113,818 markedly reduces amyloid pathology in a mouse model of Alzheimer’s disease. Neuron 44: 227–238, 2004. 138. Igarashi M, Gao F, Kim HW, Ma KZ, Bell JM, Rapoport SI. Dietary n-6 PUFA deprivation for 15 weeks reduces arachidonic acid concentrations while increasing n-3 PUFA concentrations in organs of post-weaning male rats. BBA Mol Cell Biol Lipids 1791: 132–139, 2009. 139. Inoue K, Garner C, Ackermann BL, Oe T, Blair IA. Liquid chromatography/tandem mass spectrometry characterization of oxidized amyloid beta peptides as potential biomarkers of Alzheimer’s disease. Rapid Commun Mass Spectrom 20: 911– 918, 2006. 140. Isaacs AM, Senn DB, Yuan M, Shine JP, Yankner BA. Acceleration of amyloid beta -peptide aggregation by physiological concentrations of calcium. J Biol Chem 281: 27916 –27923, 2006. 141. Issa AM, Mojica WA, Morton SC, Traina S, Newberry SJ, Hilton LG, Garland RH, MacLean CH. The efficacy of omega-3 fatty acids on cognitive function in aging and dementia: a systematic review. Dement Geriatr Cogn Disord 21: 88 –96, 2006. 142. Jang H, Arce FT, Ramachandran S, Capone R, Azimova R, Kagan BL, Nussinov R, Lal R. Truncated -amyloid peptide channels provide an alternative mechanism for Alzheimer’s Disease and Down syndrome. Proc Natl Acad Sci USA 107: 6838 – 6543, 2010. 143. Jarrett JT, Berger EP, Lansbury PT. The carboxy terminus of the beta amyloid protein is critical for the seeding of amyloid formation: implications for the pathogenesis of Alzheimer’s disease. Biochemistry 32: 4693– 4697, 1993. 144. Jeandel C, Nicolas MB, Dubois F, Nabet-Belleville F, Penin F, Cuny G. Lipid peroxidation and free radical scavengers in Alzheimer’s disease. Gerontology 35: 275–282, 1989. 115. Gylys KH, Fein JA, Yang F, Miller CA, Cole GM. Increased cholesterol in A beta-positive nerve terminals from Alzheimer’s disease cortex. Neurobiol Aging 28: 8 –17, 2007. 131. Hirai K, Aliev G, Nunomura A, Fujioka H, Russell RL, Atwood CS, Johnson AB, Kress Y, Vinters HV, Tabaton M, Shimohama S, Cash AD, Siedlak SL, Harris PLR, Jones PK, Petersen RB, Perry G, Smith MA. Mitochondrial abnormalities in Alzheimer’s disease. J Neurosci 21: 3017–3023, 2001. 145. Ji SR, Wu Y, Sui SF. Cholesterol is an important factor affecting the membrane insertion of betaamyloid peptide (A beta 1-40), which may potentially inhibit the fibril formation. J Biol Chem 277: 6273– 6279, 2002. 116. Haeffner F, Smith DG, Barnham KJ, Bush AI. Model studies of cholesterol and ascorbate oxidation by copper complexes: relevance to Alzheimer’s disease beta-amyloid metallochemistry. J Inorg Biochem 99: 2403–2422, 2005. 132. Hou LM, Kang I, Marchant RE, Zagorski MG. Methionine 35 oxidation reduces fibril assembly of the amyloid A beta-(1-42) peptide of Alzheimer’s disease. J Biol Chem 277: 40173– 40176, 2002. 117. Hahnel D, Beyer K, Engelmann B. Inhibition of peroxyl radical-mediated lipid oxidation by plasmalogen phospholipids and alpha-tocopherol. Free Radic Biol Med 27: 1087–1094, 1999. 133. Hsieh H, Boehm J, Sato C, Iwatsubo T, Tomita T, Sisodia S, Malinow R. AMPAR removal underlies A beta-induced synaptic depression and dendritic spine loss. Neuron 52: 831– 843, 2006. 146. Johansson AS, Garlind A, Berglind-Dehlin F, Karlsson G, Edwards K, Gellerfors P, EkholmPettersson F, Palmblad J, Lannfelt L. Docosahexaenoic acid stabilizes soluble amyloid-beta protofibrils and sustains amyloid-beta-induced neurotoxicity in vitro. FEBS J 274: 990 –1000, 2007. 118. Hahnel D, Huber T, Kurze V, Beyer K, Engelmann B. Contribution of copper binding to the inhibition of lipid oxidation by plasmalogen phospholipids. Biochem J 340: 377–383, 1999. 134. Huang XD, Atwood CS, Hartshorn MA, Multhaup G, Goldstein LE, Scarpa RC, Cuajungco MP, Gray DN, Lim J, Moir RD, Tanzi RE, Bush AI. The A beta peptide of Alzheimer’s disease directly produces hydrogen peroxide through metal ion reduction. Biochemistry 38: 7609 –7616, 1999. 119. Han X. Lipid alterations in the earliest clinically recognizable stage of Alzheimer’s disease: implication of the role of lipids in the pathogenesis of Alzheimer’s disease. Curr Alzheimer Res 2: 65– 77, 2005. 120. Han XL, Holtzman DM, McKeel DW. Plasmalogen deficiency in early Alzheimer’s disease subjects and in animal models: molecular characterization using electrospray ionization mass spectrometry. J Neurochem 77: 1168 –1180, 2001. 64 135. Huang XD, Cuajungco MP, Atwood CS, Hartshorn MA, Tyndall JDA, Hanson GR, Stokes KC, Leopold M, Multhaup G, Goldstein LE, Scarpa RC, Saunders AJ, Lim J, Moir RD, Glabe C, Bowden EF, Masters CL, Fairlie DP, Tanzi RE, Bush AI. Cu(II) potentiation of Alzheimer A beta neurotoxicity: correlation with cell-free hydrogen peroxide production and metal reduction. J Biol Chem 274: 37111–37116, 1999. PHYSIOLOGY • Volume 26 • February 2011 • www.physiologyonline.org 147. Kagan BL, Azimov R, Azimova R. Amyloid peptide channels. J Membrane Biol 202: 1–10, 2004. 148. Kakio A, Nishimoto S, Yanagisawa K, Kozutsumi Y, Matsuzaki K. Cholesterol-dependent formation of GM1 ganglioside-bound amyloid betaprotein, an endogenous seed for Alzheimer amyloid. J Biol Chem 276: 24985–24990, 2001. 149. Kakio A, Nishimoto S, Yanagisawa K, Kozutsumi Y, Matsuzaki K. Interactions of amyloid beta-protein with various gangliosides in raft-like membranes: importance of GM1 ganglioside-bound form as an endogenous seed for Alzheimer amyloid. Biochemistry 41: 7385–7390, 2002. 150. Kakio A, Nishimoto SI, Kozutsumi Y, Matsuzaki K. Formation of a membrane-active form of amyloid beta-protein in raft-like model membranes. Biochem Biophys Res Commun 303: 514 –518, 2003. Downloaded from http://physiologyonline.physiology.org/ by 10.220.32.247 on June 15, 2017 108. Ghribi O, Larsen B, Schrag M, Herman MM. High cholesterol content in neurons increases BACE, beta-amyloid, and phosphorylated tau levels in rabbit hippocampus. Exp Neurol In Press: 2006. 121. Han XL, Holtzman DM, McKeel DW, Kelley J, Morris JC. Substantial sulfatide deficiency and ceramide elevation in very early Alzheimer’s disease: potential role in disease pathogenesis. J Neurochem 82: 809 – 818, 2002. REVIEWS 151. Kakio A, Yano Y, Takai D, Kuroda Y, Matsumoto O, Kozutsumi Y, Matsuzaki K. Interaction between amyloid beta-protein aggregates and membranes. J Pept Sci 10: 612– 621, 2004. 152. Kalvodova L, Kahya N, Schwille P, Ehehalt R, Verkade P, Drechsel D, Simons K. Lipids as modulators of proteolytic activity of BACE: involvement of cholesterol, glycosphingolipids, and anionic phospholipids in vitro. J Biol Chem 280: 36815–36823, 2005. 153. Karr JW, Szalai VA. Cu(II) binding to monomeric, oligomeric, and fibrillar forms of the Alzheimer’s disease amyloid-beta peptide. Biochemistry 47: 5006 –5016, 2008. 154. Kayed R, Sokolov Y, Edmonds B, McIntire TM, Milton SC, Hall JE, Glabe CG. Permeabilization of lipid bilayers is a common conformation-dependent activity of soluble amyloid oligomers in protein misfolding diseases. J Biol Chem 279: 46363– 46366, 2004. 156. Khaselev N, Murphy RC. Susceptibility of plasmenyl glycerophosphoethanolamine lipids containing arachidonate to oxidative degradation. Free Radic Biol Med 26: 275–284, 1999. 157. Khaselev N, Murphy RC. Peroxidation of arachidonate containing plasmenyl glycerophosphocholine: facile oxidation of esterified arachidonate at carbon-5. Free Radic Biol Med 29: 620 – 632, 2000. 158. Khaselev N, Murphy RC. Structural characterization of oxidized phospholipid products derived from arachidonate-containing plasmenyl glycerophosphocholine. J Lipid Res 41: 564 –572, 2000. 159. Kim HY. Novel metabolism of docosahexaenoic acid in neural cells. J Biol Chem 282: 18661– 18665, 2007. 160. Kitazawa M, Cheng D, LaFerla FM. Chronic copper exposure exacerbates both amyloid and tau pathology and selectively dysregulates cdk5 in a mouse model of AD. J Neurochem 108: 1550 – 1560, 2009. 161. Komatsu H, Liu L, Murray IV, Axelsen PH. A mechanistic link between oxidative stress and membrane mediated amyloidogenesis revealed by infrared spectroscopy. BBA Biomembranes 1768: 1913–1922, 2007. 162. Kontush A. Amyloid-: an antioxidant that becomes a pro-oxidant and critically contributes to Alzheimer’s disease. Free Radic Biol Med 31: 1120 –1131, 2001. 163. Kontush A, Berndt C, Weber W, Akopyan V, Arlt S, Schippling S, Beisiegel U. Amyloid- is an antioxidant for lipoproteins in cerebrospinal fluid and plasma. Free Radic Biol Med 30: 119 –128, 2001. 164. Kontush A, Donarski N, Beisiegel U. Resistance of human cerebrospinal fluid to in vitro oxidation is directly related to its amyloid-beta content. Free Radic Res 35: 507–517, 2001. 165. Koppaka V, Axelsen PH. Accelerated accumulation of amyloid beta proteins on oxidatively damaged lipid membranes. Biochemistry 39: 10011– 10016, 2000. 166. Koppaka V, Paul C, Murray IVJ, Axelsen PH. Early synergy between A42 and oxidatively damaged membranes in promoting amyloid fibril formation by A40. J Biol Chem 278: 36277–36284, 2003. 167. Kremer JJ, Murphy RM. Kinetics of adsorption of beta-amyloid peptide A beta(1-40) to lipid bilayers. J Biochem Biophys Methods 57: 159 –169, 2003. 169. Kremer JJ, Sklansky DJ, Murphy RM. Profile of changes in lipid bilayer structure caused by betaamyloid peptide. Biochemistry 40: 8563– 8571, 2001. 170. Kuczynski B, Reo NV. Evidence that plasmalogen is protective against oxidative stress in the rat brain. Neurochem Res 31: 639 – 656, 2006. 171. Ladu MJ, Falduto MT, Manelli AM, Reardon CA, Getz GS, Frail DE. Isoform-specific binding of apolipoprotein-E to beta-amyloid. J Biol Chem 269: 23403–23406, 1994. 172. LaFerla FM. Calcium dyshomeostasis and intracellular signalling in Alzheimer’s disease. Nat Rev Neurosci 3: 862– 872, 2002. 173. Lal R, Lin H, Quist AP. Amyloid beta ion channel: 3D structure and relevance to amyloid channel paradigm. BBA Biomembranes 1768: 1966–1975, 2007. 174. Lashuel HA, Hartley D, Petre BM, Walz T, Lansbury PT. Neurodegenerative disease: amyloid pores from pathogenic mutations. Nature 418: 291, 2002. 175. Lashuel HA, Lansbury PT. Are amyloid diseases caused by protein aggregates that mimic bacterial pore-forming toxins? Q Rev Biophys 39: 167– 201, 2006. 176. Lau TL, Ambroggio EE, Tew DJ, Cappai R, Masters CL, Fidelio GD, Barnham KJ, Separovic F. Amyloid-beta peptide disruption of lipid membranes and the effect of metal ions. J Mol Biol 356: 759 –770, 2006. 177. Lauderback CM, Hackett JM, Huang FF, Keller JN, Szweda LI, Markesbery WR, Butterfield DA. The glial glutamate transporter, GLT-1, is oxidatively modified by 4-hydroxy-2-nonenal in the Alzheimer’s disease brain: the role of A beta 1– 42. J Neurochem 78: 413– 416, 2001. 178. Lauderback CM, Kanski J, Hackett JM, Maeda N, Kindy MS, Butterfield DA. Apolipoprotein E modulates Alzheimer’s A beta(1-42)-induced oxidative damage to synaptosomes in an allele-specific manner. Brain Res 924: 90 –97, 2002. 179. Lawson JA, Rokach J, FitzGerald GA. Isoprostanes: formation, analysis and use as indices of lipid peroxidation in vivo. J Biol Chem 274: 24441–24444, 1999. 186. Lin H, Bhatia R, Lal R. Amyloid beta protein forms ion channels: implications for Alzheimer’s disease pathophysiology. FASEB J 15: 2433–2444, 2001. 187. Liu L, Komatsu H, Murray IVJ, Axelsen PH. Promotion of amyloid  protein misfolding and fibrillogenesis by a lipid oxidation product. J Mol Biol 377: 1236 –1250, 2008. 188. Liu SJ, Zukin RS. Ca2⫹-permeable AMPA receptors in synaptic plasticity and neuronal death. Trends Neurosci 30: 126 –134, 2007. 189. Lorenzo A, Yuan ML, Zhang ZH, Paganetti PA, Sturchler-Pierrat C, Staufenbiel M, Mautino J, Sol V, Sommer B, Yankner BA. Amyloid beta interacts with the amyloid precursor protein: a potential toxic mechanism in Alzheimer’s disease. Nat Neurosci 3: 460 – 464, 2000. 190. Lovell MA, Ehmann WD, Mattson MP, Markesbery WR. Elevated 4-hydroxynonenal in ventricular fluid in Alzheimer’s disease. Neurobiol Aging 18: 457– 461, 1997. 191. Lovell MA, Robertson JD, Teesdale WJ, Campbell JL, Markesbery WR. Copper, iron and zinc in Alzheimer’s disease senile plaques. J Neurol Sci 158: 47–52, 1998. 192. Lovell MA, Xie CS, Markesbery WR. Acrolein is increased in Alzheimer’s disease brain and is toxic to primary hippocampal cultures. Neurobiol Aging 22: 187–194, 2001. 193. Lukiw WJ, Cui JG, Marcheselli VL, Bodker M, Botkjaer A, Gotlinger K, Serhan CN, Bazan NG. A role for docosahexaenoic acid-derived neuroprotectin D1 in neural cell survival and Alzheimer disease. J Clin Invest 115: 2774 –2783, 2005. 194. Ma JY, Yee A, Brewer HB, Das S, Potter H. Amyloid-associated proteins alpha(1)-antichymotrypsin and apolipoprotein-E promote assembly of Alzheimer beta-protein into filaments. Nature 372: 92–94, 1994. 195. Maeba R, Sawada Y, Shimasaki H, Takahashi I, Ueta N. Ethanolamine plasmalogens protect cholesterol-rich liposomal membranes from oxidation caused by free radicals. Chem Phys Lipids 120: 145–151, 2002. 196. Maeba R, Ueta N. Ethanolamine plasmalogens prevent the oxidation of cholesterol by reducing the oxidizability of cholesterol in phospholipid bilayers. J Lipid Res 44: 164 –171, 2003. 197. Mahley RW, Rall SC Jr. Apolipoprotein E: far more than a lipid transport protein. Ann Rev Genom Hum Gen 1: 507–537, 2000. 180. Lee SH, Blair IA. Characterization of 4-oxo-2-nonenal as a novel product of lipid peroxidation. Chem Res Tox 13: 698 –702, 2000. 198. Manelli AM, Stine WB, Van Eldik LJ, Ladu MJ. ApoE A1– 42 interactions. J Mol Neurosci 23: 235–246, 2004. 181. Lee SJ, Liyanage U, Bickel PE, Xia WM, Lansbury PT, Kosik KS. A detergent-insoluble membrane compartment contains A beta in vivo. Nat Med 4: 730 –734, 1998. 199. Marchesi VT. An alternative interpretation of the amyloid A beta hypothesis with regard to the pathogenesis of Alzheimer’s disease. Proc Natl Acad Sci USA 102: 9093–9098, 2005. 182. Lehtonen JYA, Holopainen JM, Kinnunen PKJ. Activation of phospholipase A(2) by amyloid betapeptides in vitro. Biochemistry 35: 9407–9414, 1996. 200. Marcus DL, Thomas C, Rodriguez C, Simberkoff K, Tsai JS, Strafaci JA, Freedman ML. Increased peroxidation and reduced antioxidant enzyme activity in Alzheimer’s disease. Exp Neurol 150: 40 – 44, 1998. 183. Leskovjan AC, Lanzirotti A, Miller LM. Amyloid plaques in PSAPP mice bind less metal than plaques in human Alzheimer’s disease. Neuroimage 47: 1215–1220, 2009. 184. Lesne S, Koh MT, Kotilinek L, Kayed R, Glabe CG, Yang A, Gallagher M, Ashe KH. A specific amyloid-beta protein assembly in the brain impairs memory. Nature 440: 352–357, 2006. 185. Lim GP, Calon F, Morihara T, Yang FS, Teter B, Ubeda O, Salem N, Frautschy SA, Cole GM. A diet enriched with the omega-3 fatty acid docosahexaenoic acid reduces amyloid burden in an aged Alzheimer mouse model. J Neurosci 25: 3032–3040, 2005. 201. Markesbery WR. Oxidative stress hypothesis in Alzheimer’s disease. Free Radic Biol Med 23: 134 –147, 1997. 202. Markesbery WR, Carney JM. Oxidative alterations in Alzheimer’s disease. Brain Pathol 9: 133– 146, 1999. 203. Markesbery WR, Lovell MA. Four-hydroxynonenal, a product of lipid peroxidation, is increased in the brain in Alzheimer’s disease. Neurobiol Aging 19: 33–36, 1998. 204. Martinez-Senac MD, Villalain J, Gomez-Fernandez JC. Structure of the Alzheimer beta-amyloid peptide (25-35) and its interaction with negatively charged phospholipid vesicles. Eur J Biochem 265: 744 –753, 1999. PHYSIOLOGY • Volume 26 • February 2011 • www.physiologyonline.org 65 Downloaded from http://physiologyonline.physiology.org/ by 10.220.32.247 on June 15, 2017 155. Kelly BL, Ferreira A. Beta-amyloid-induced dynamin 1 degradation is mediated by N-methyl-Daspartate receptors in hippocampal neurons. J Biol Chem 281: 28079 –28089, 2006. 168. Kremer JJ, Pallitto MM, Sklansky DJ, Murphy RM. Correlation of -amyloid aggregate size and hydrophobicity with decreased bilayer fluidity of model membranes. Biochemistry 39: 10309 – 10318, 2000. REVIEWS 205. Matsuzaki K. Physicochemical interactions of amyloid -peptide with lipid bilayers. BBA Biomembranes 1768: 1935–1942, 2007. 206. Matsuzaki K, Horikiri C. Interactions of amyloid beta-peptide (1-40) with ganglioside-containing membranes. Biochemistry 38: 4137– 4142, 1999. 207. Matsuzaki K, Noguch T, Wakabayashi M, Ikeda K, Okada T, Ohashi Y, Hoshino M, Naiki H. Inhibitors of amyloid beta-protein aggregation mediated by GM1-containing raft-like membranes. BBA Biomembranes 1768: 122–130, 2007. 208. Mattson MP, Cheng B, Culwell AR, Esch FS, Lieberburg I, Rydel RE. Evidence for excitoprotective and intraneuronal calcium-regulating roles for secreted forms of the beta-amyloid precursor protein. Neuron 10: 243–254, 1993. 210. McGrath LT, McGleenon BM, Brennan S, McColl D, McIlroy S, Passmore AP. Increased oxidative stress in Alzheimer’s disease as assessed with 4-hydroxynonenal but not malondialdehyde. QJM 94: 485– 490, 2001. 211. McIntosh LJ, Trush MA, Troncoso JC. Increased susceptibility of Alzheimer’s disease temporal cortex to oxygen free radical-mediated processes. Free Radic Biol Med 23: 183–190, 1997. 212. McLaurin J, Chakrabartty A. Membrane disruption by Alzheimer beta-amyloid peptides mediated through specific finding to either phospholipids or gangliosides: implications for neurotoxicity. J Biol Chem 271: 26482–26489, 1996. 213. McLaurin J, Chakrabartty A. Characterization of the interactions of Alzheimer beta-amyloid peptides with phospholipid membranes. Eur J Biochem 245: 355–363, 1997. 214. McLaurin J, Darabie AA, Morrison MR. Cholesterol, a modulator of membrane-associated A beta-fibrillogenesis. Alz Dis Vasc Etiol Path 977: 376 –383, 2002. 215. McLaurin J, Franklin T, Fraser PE, Chakrabartty A. Structural transitions associated with the interaction of Alzheimer beta-amyloid peptides with gangliosides. J Biol Chem 273: 4506 – 4515, 1998. 216. Minton AP. Implications of macromolecular crowding for protein assembly. Curr Opin Struct Biol 10: 34 –39, 2000. 217. Miyata M, Smith JD. Apolipoprotein E allele-specific antioxidant activity and effects on cytotoxicity by oxidative insults and beta-amyloid peptides. Nat Gen 14: 55– 61, 1996. 218. Molander-Melin M, Blennow K, Bogdanovic N, Dellheden B, Mansson JE, Fredman P. Structural membrane alterations in Alzheimer brains found to be associated with regional disease development; increased density of gangliosides GM1 and GM2 and loss of cholesterol in detergentresistant membrane domains. J Neurochem 92: 171–182, 2005. 219. Monji A, Utsumi H, Ueda T, Imoto T, Yoshida I, Hashioka S, Tashiro K, Tashiro N. The relationship between the aggregational state of the amyloid-beta peptides and free radical generation by the peptides. J Neurochem 77: 1425–1432, 2001. 220. Montine TJ, Neely MD, Quinn JF, Beal MF, Markesbery WR, Roberts LJ, Morrow JD. Lipid peroxidation in aging brain and Alzheimer’s disease. Free Radic Biol Med 33: 620 – 626, 2002. 221. Montine TJ, Quinn JF, Milatovic D, Silbert LC, Dang T, Sanchez S, Terry E, Roberts LJ, Kaye JA, Morrow JD. Peripheral F-2-isoprostanes and F-4neuroprostanes are not increased in Alzheimer’s disease. Ann Neurol 52: 175–179, 2002. 66 223. Morris MC, Evans DA, Bienias JL, Tangney CC, Bennett DA, Wilson RS, Aggarwal N, Schneider J. Consumption of fish and n-3 fatty acids and risk of incident Alzheimer disease. Arch Neurol 60: 940 –946, 2003. 224. Morris MC, Evans DA, Tangney CC, Bienias JL, Wilson RS. Fish consumption and cognitive decline with age in a large community study. Arch Neurol 62: 1849 –1853, 2005. 225. Morrow JD, Awad JA, Boss HJ, Blair IA, Roberts LJ, II. Non-cyclooxygenase-derived prostanoids (F2-Isoprostanes) are formed in situ on phosphlipids. Proc Natl Acad Sci USA 89: 10721–10725, 1992. 226. Morrow JD, Minton TA, Mukundan CR, Campbell MD, Zackert WE, Daniel VC, Badr KF, Blair IA, Roberts LJ II. Free radical-induced generation of isoprostanes in vivo. J Biol Chem 269: 4317– 4326, 1994. 227. Mulder C, Wahlund LO, Teerlink T, Blomberg M, Veerhuis R, van Kamp GJ, Scheltens P, Scheffer PG. Decreased lysophosphatidylcholine/phosphatidylcholine ratio in cerebrospinal fluid in Alzheimer’s disease. J Neural Transm 110: 949 –955, 2003. 228. Munishkina LA, Cooper EM, Uversky VN, Fink AL. The effect of macromolecular crowding on protein aggregation and amyloid fibril formation. J Mol Recognit 17: 456 – 464, 2004. 229. Murphy EJ, Huang HM, Cowburn RF, Lannfeltd L, Gibson GE. Phospholipid mass is increased in fibroblasts bearing the Swedish amyloid precursor mutation. Brain Res Bull 69: 79 – 85, 2006. 230. Murphy RC. Free-radical-induced oxidation of arachidonoyl plasmalogen phospholipids: antioxidant mechanism and precursor pathway for bioactive eicosanoids. Chem Res Tox 14: 463– 472, 2001. 231. Murray IVJ, Liu L, Komatsu H, Uryu K, Xiao G, Lawson JA, Axelsen PH. Membrane mediated amyloidogenesis and the promotion of oxidative lipid damage by amyloid beta proteins. J Biol Chem 282: 9335–9345, 2007. 238. O’Nuallain B, Shivaprasad S, Kheterpal I, Wetzel R. Thermodynamics of A beta(1-40) amyloid fibril elongation. Biochemistry 44: 12709–12718, 2005. 239. Okada T, Ikeda K, Wakabayashi M, Ogawa M, Matsuzaki K. Formation of toxic A beta(1-40) fibrils on GM1 ganglioside-containing membranes mimicking lipid rafts: polymorphisms in A beta(140) fibrils. J Mol Biol 382: 1066 –1074, 2008. 240. Okada T, Wakabayashi M, Ikeda K, Matsuzaki K. Formation of toxic fibrils of Alzheimer’s amyloid beta-protein-(1-40) by monosialoganglioside GM1, a neuronal membrane component. J Mol Biol 371: 481– 489, 2007. 241. Opazo C, Huang XD, Cherny RA, Moir RD, Roher AE, White AR, Cappai R, Masters CL, Tanzi RE, Inestrosa NC, Bush AI. Metalloenzyme-like activity of Alzheimer’s disease beta-amyloid- Cu-dependent catalytic conversion of dopamine, cholesterol, and biological reducing agents to neurotoxic H2O2. J Biol Chem 277: 40302–40308, 2002. 242. Paltauf F. Ether lipids in biomembranes. Chem Phys Lipids 74: 101–139, 1994. 243. Pamplona R, Dalfo E, Ayala VR, Bellmunt MJ, Prat J, Ferrer I, Portero-Otin M. Proteins in human brain cortex are modified by oxidation, glycoxidation, and lipoxidation: effects of Alzheimer disease and identification of lipoxidation targets. J Biol Chem 280: 21522–21530, 2005. 244. Patrono C, FitzGerald GA. Isoprostanes: potential markers of oxidant stress in atherothrombotic disease. Arterioscler Thromb Vasc Biol 17: 2309 –2315, 1997. 245. Permanne B, Perez C, Soto C, Frangione B, Wisniewski T. Detection of apolipoprotein E dimeric soluble amyloid beta complexes in Alzheimer’s disease brain supernatants. Biochem Biophys Res Commun 240: 715–720, 1997. 246. Petersen CAH, Alikhani N, Behbahani H, Wiehager B, Pavlov PF, Alafuzoff I, Leinonen V, Ito A, Winblad B, Glaser E, Ankarcrona M. The amyloid beta-peptide is imported into mitochondria via the TOM import machinery and localized to mitochondrial cristae. Proc Natl Acad Sci USA 105: 13145–13150, 2008. 247. Pettegrew JW, Panchalingam K, Hamilton RL, McClure RJ. Brain membrane phospholipid alterations in Alzheimer’s disease. Neurochem Res 26: 771–782, 2001. 232. Murray IVJ, Sindoni ME, Axelsen PH. Promotion of oxidative lipid membrane damage by amyloid beta proteins. Biochemistry 44: 12606 –12613, 2005. 248. Pike CJ, RamezanArab N, Cotman CW. Betaamyloid neurotoxicity in vitro: evidence of oxidative stress but not protection by antioxidants. J Neurochem 69: 1601–1611, 1997. 233. Namba Y, Tomonaga M, Kawasaki H, Otomo E, Ikeda K. Apolipoprotein-E immunoreactivity in cerebral amyloid deposits and neurofibrillary tangles in Alzheimers-disease and Kuru plaque amyloid In Creutzfeldt-Jakob disease. Brain Res 541: 163–166, 1991. 249. Pillot T, Goethals M, Vanloo B, Talussot C, Brasseur R, Vandekerckhove J, Rosseneu M, Lins L. Fusogenic properties of the C-terminal domain of the Alzheimer beta-amyloid peptide. J Biol Chem 271: 28757–28765, 1996. 234. Natte R, Yamaguchi H, Maat-Schieman MLC, Prins FA, Neeskens P, Roos RAC, van Duinen SG. Ultrastructural evidence of early non-fibrillar A beta 42 in the capillary basement membrane of patients with hereditary cerebral hemorrhage with amyloidosis, Dutch type. Acta Neuropathol (Berl) 98: 577–582, 1999. 235. Nelson TJ, Alkon DL. Oxidation of cholesterol by amyloid precursor protein and beta-amyloid peptide. J Biol Chem 280: 7377–7387, 2005. 236. Nunomura A, Perry G, Pappolla MA, Friedland RP, Hirai K, Chiba S, Smith MA. Neuronal oxidative stress precedes amyloid-beta deposition in Down syndrome. J Neuropath Exp Neurol 59: 1011–1017, 2000. 237. Nurk E, Drevon CA, Refsum H, Solvoll K, Vollset SE, Nygard O, Nygaard HA, Engedal K, Tell GS, Smith AD. Cognitive performance among the elderly and dietary fish intake: the Hordaland Health Study. Am J Clin Nutr 86: 1470 –1478, 2007. PHYSIOLOGY • Volume 26 • February 2011 • www.physiologyonline.org 250. Plourde M, Fortier M, Vandal M, TremblayMercier J, Freemantle E, Begin M, Pifferi F, Cunnane SC. Unresolved issues in the link between docosahexaenoic acid and Alzheimer’s disease. Prost Leuk Essen Fatty Acids 77: 301– 308, 2007. 251. Pollard HB, Arispe N, Rojas E. Ion channel hypothesis for Alzheimer amyloid peptide neurotoxicity. Cell Molec Neurobiol 15: 513–526, 1995. 252. Prasad MR, Lovell MA, Yatin M, Dhillon H, Markesbery WR. Regional membrane phospholipid alterations in Alzheimer’s disease. Neurochem Res 23: 81– 88, 1998. 253. Pratico D, Clark CM, Lee VMY, Trojanowski JQ, Rokach J, FitzGerald GA. Increased 8,12-isoiPF(2 alpha)-VI in Alzheimer’s disease: correlation of a noninvasive index of lipid peroxidation with disease severity. Ann Neurol 48: 809 – 812, 2000. 254. Pratico D, Delanty N. Oxidative injury in diseases of the central nervous system: focus on Alzheimer’s disease. Am J Med 109: 577–585, 2000. Downloaded from http://physiologyonline.physiology.org/ by 10.220.32.247 on June 15, 2017 209. Mattson MP, Cheng B, Davis D, Bryant K, Lieberburg I, Rydel RE. -Amyloid peptides destabilize calcium homeostasis and render human cortical neurons vulnerable to excitotoxicity. J Neurosci 12: 376 –389, 1992. 222. Morandat S, Bortolato M, Anker G, Doutheau A, Lagarde M, Chauvet JP, Roux B. Plasmalogens protect unsaturated lipids against UV-induced oxidation in monolayer. Biochim Biophys Acta 1616: 137–146, 2003. REVIEWS 255. Pratico D, Lee VMY, Trojanowski JQ, Rokach J, FitzGerald GA. Increased F-2-isoprostanes in Alzheimer’s disease: evidence for enhanced lipid peroxidation in vivo. FASEB J 12: 1777–1783, 1998. 256. Pratico D, Uryu K, Leight S, Trojanowswki JQ, Lee VMY. Increased lipid peroxidation precedes amyloid plaque formation in an animal model of Alzheimer amyloidosis. J Neurosci 21: 4183– 4187, 2001. 257. Puglielli L, Friedlich AL, Setchell KDR, Nagano S, Opazo C, Cherny RA, Barnham KJ, Wade JD, Melov S, Kovacs DM, Bush AI. Alzheimer disease -amyloid activity mimics cholesterol oxidase. J Clin Invest 115: 2556 –2563, 2005. 258. Qahwash IM, Boire A, Lanning J, Krausz T, Pytel P, Meredith SC. Site-specific effects of peptide lipidation on beta-amyloid aggregation and cytotoxicity. J Biol Chem 282: 36987–36997, 2007. 260. Rajendran L, Schneider A, Schlechtingen G, Weidlich S, Ries J, Braxmeier T, Schwille P, Schulz JB, Schroeder C, Simons M, Jennings G, Knolker HJ, Simons K. Efficient inhibition of the Alzheimer’s disease -secretase by membrane targeting. Science 320: 520 –523, 2008. 261. Rangachari V, Moore BD, Reed DK, Sonoda LK, Bridges AW, Conboy E, Hartigan D, Rosenberry TL. Amyloid-(1-42) rapidly forms protofibrils and oligomers by distinct pathways in low concentrations of sodium dodecylsulfate. Biochemistry 46: 12451–12462, 2007. 262. Reddy PH. Amyloid beta, mitochondrial structural and functional dynamics in Alzheimer’s disease. Exp Neurol 218: 286 –292, 2009. 263. Refolo LM, Pappolla MA, Malester B, LaFrancois J, Bryant-Thomas T, Wang R, Tint GS, Sambamurti K, Duff K. Hypercholesterolemia accelerates the Alzheimer’s amyloid pathology in a transgenic mouse model. Neurobiol Dis 7: 321–331, 2000. 264. Reiss D, Beyer K, Engelmann B. Delayed oxidative degradation of polyunsaturated diacyl phospholipids in the presence of plasmalogen phospholipids in vitro. Biochem J 323: 807– 814, 1997. 265. Relini A, Cavalleri O, Rolandi R, Gliozzi A. The two-fold aspect of the interplay of amyloidogenic proteins with lipid membranes. Chem Phys Lipids 158: 1–9, 2009. 266. Roberts LJ, Fessel JP. The biochemistry of the isoprostane, neuroprostane, and isofuran pathways of lipid peroxidation. Chem Phys Lipids 128: 173–186, 2004. 267. Roberts LJ, Montine TJ, Markesbery WR, Tapper AR, Hardy P, Chemtob S, Dettbarn WD, Morrow JD. Formation of isoprostane-like compounds (neuroprostanes) in vivo from docosahexaenoic acid. J Biol Chem 273: 13605–13612, 1998. 268. Roberts LJ, II, Morrow JD. IsoProstanes: novel markers of endogenous lipid peroxidation and potential mediators of oxidant injury. Ann NY Acad Sci 744: 237–242, 1994. 269. Roheim PS, Carey M, Forte T, Vega GL. Apolipoproteins in human cerebrospinal fluid. Proc Natl Acad Sci USA 76: 4646 – 4649, 1979. 270. Rottkamp CA, Nunomura A, Raina AK, Sayre LM, Perry G, Smith MA. Oxidative stress, antioxidants, and Alzheimer disease. Alzheimer Dis Assoc Disord 14, Suppl 1: S62–S66, 2000. 272. Sarell CJ, Syme CD, Rigby SEJ, Viles JH. Copper(II) binding to amyloid-beta fibrils of Alzheimer’s disease reveals a picomolar affinity: stoichiometry and coordination geometry are independent of A beta oligomeric form. Biochemistry 48: 4388 – 4402, 2009. 285. Shin SJ, Lee SE, Boo JH, Kim M, Yoon YD, Kim SI, Mook-Jung I. Profiling proteins related to amyloid deposited brain of Tg2576 mice. Proteomics 4: 3359 –3368, 2004. 286. Shringarpure R, Grune T, Sitte N, Davies KJA. 4-Hydroxynonenal-modified amyloid-beta peptide inhibits the proteasome: possible importance in Alzheimer’s disease. Cell Mol Life Sci 57: 1802–1809, 2000. 287. Siegel SJ, Bieschke J, Powers ET, Kelly JW. The oxidative stress metabolite 4-hydroxynonenal promotes Alzheimer protofibril formation. Biochemistry 46: 1503–1510, 2007. 273. Sayre LM, Perry G, Harris PLR, Liu YH, Schubert KA, Smith MA. In situ oxidative catalysis by neurofibrillary tangles and senile plaques in Alzheimer’s disease: a central role for bound transition metals. J Neurochem 74: 270 –279, 2000. 288. Simons M, Keller P, De Strooper B, Beyreuther K, Dotti CG, Simons K. Cholesterol depletion inhibits the generation of beta-amyloid in hippocampal neurons. Proc Natl Acad Sci USA 95: 6460 – 6464, 1998. 274. Sayre LM, Zelasko DA, Harris PLR, Perry G, Salomon RG, Smith MA. 4-Hydroxynonenal-derived advanced lipid peroxidation end products are increased in Alzheimer’s disease. J Neurochem 68: 2092–2097, 1997. 289. Sjogren M, Blennow K. The link between cholesterol and Alzheimer’s disease. World J Biol Psych 6: 85–97, 2005. 275. Schaefer EJ, Bongard V, Beiser AS, Lamon-Fava S, Robins SJ, Au R, Tucker KL, Kyle DJ, Wilson PWF, Wolf PA. Plasma phosphatidylcholine docosahexaenoic acid content and risk of dementia and Alzheimer disease: the Framingham heart study. Arch Neurol 63: 1545–1550, 2006. 276. Schauerte JA, Wong PT, Wisser KC, Ding H, Steel DG, Gafni A. Simultaneous single molecule fluorescence and conductivity studies reveal distinct classes of A species on lipid bilayers. Biochemistry 49: 3031–3039, 2010. 277. Schippling S, Kontush A, Arlt S, Buhmann C, Sturenburg HJ, Mann U, Muller-Thomsen T, Beisiegel U. Increased lipoprotein oxidation in Alzheimer’s disease. Free Radic Biol Med 28: 351–360, 2000. 278. Schmechel DE, Saunders AM, Strittmatter WJ, Crain BJ, Huletter CM, Joo SH, Pericakvance MA, Goldgaber D, Roses AD. Increased amyloid betapeptide deposition in cerebral-cortex as a consequence of apolipoprotein-E genotype in lateonset Alzheimer-disease. Proc Natl Acad Sci USA 90: 9649 –9653, 1993. 279. Schmitz C, Rutten BPF, Pielen A, Schafer S, Wirths O, Tremp G, Czech C, Blanchard V, Multhaup G, Rezaie P, Korr H, Steinbusch HWM, Pradier L, Bayer TA. Hippocampal neuron loss exceeds amyloid plaque load in a transgenic mouse model of Alzheimer’s disease. Am J Pathol 164: 1495–1502, 2004. 280. Schneeweis LA, Koppaka V, Lund-Katz S, Phillips MC, Axelsen PH. Structural analysis of lipoprotein E particles. Biochemistry 44: 12525–12534, 2005. 281. Sengupta P, Garai K, Sahoo B, Shi Y, Callaway DJE, Maiti S. The amyloid beta peptide [A beta(140)] is thermodynamically soluble at physiological concentrations. Biochemistry 42: 10506 –10513, 2003. 282. Shankar GM, Li SM, Mehta TH, Garcia-Munoz A, Shepardson NE, Smith I, Brett FM, Farrell MA, Rowan MJ, Lemere CA, Regan CM, Walsh DM, Sabatini BL, Selkoe DJ. Amyloid-beta protein dimers isolated directly from Alzheimer’s brains impair synaptic plasticity and memory. Nat Med 14: 837– 842, 2008. 283. Shao H, Jao S, Ma K, Zagorski MG. Solution structures of micelle-bound amyloid beta-(1-40) and beta-(1-42) peptides of Alzheimer’s disease. J Mol Biol 285: 755–773, 1999. 284. Shearer J, Szalai VA. The Amyloid- peptide of Alzheimer’s disease binds Cu⫹ in a linear Bis-His coordination environment: insight into a possible neuroprotective mechanism for the amyloid- peptide. J Am Chem Soc 130: 17826 –17835, 2008. 290. Smith DP, Ciccotosto GD, Tew DJ, Fodero-Tavoletti MT, Johanssen T, Masters CL, Barnham KJ, Cappai R. Concentration dependent Cu2⫹ induced aggregation and dityrosine formation of the Alzheimer’s disease amyloid- peptide. Biochemistry 46: 2881–2891, 2007. 291. Smith DP, Smith DG, Curtain CC, Boas JF, Pilbrow JR, Ciccotosto GD, Lau TL, Tew DJ, Perez K, Wade JD, Bush AI, Drew SC, Separovic F, Masters CL, Cappai R, Barnham KJ. Copper mediated amyloid-beta toxicity is associated with an intermolecular histidine bridge. J Biol Chem 281: 15145–15154, 2006. 292. Smith MA, Casadesus G, Joseph JA, Perry G. Amyloid-beta and tau serve antioxidant functions in the aging and Alzheimer brain. Free Radic Biol Med 33: 1194 –1199, 2002. 293. Smith MA, Harris PLR, Sayre LM, Beckman JS, Perry G. Widespread peroxynitrite-mediated damage in Alzheimer’s disease. J Neurosci 17: 2653–2657, 1997. 294. Smith MA, Hirai K, Hsiao K, Pappolla MA, Harris PLR, Siedlak SL, Tabaton M, Perry G. Amyloidbeta deposition in Alzheimer transgenic mice is associated with oxidative stress. J Neurochem 70: 2212–2215, 1998. 295. Smith MA, Perry G, Richey PL, Sayre LM, Anderson VE, Beal MF, Kowall N. Oxidative damage in Alzheimer’s. Nature 382: 120 –121, 1996. 296. Smith MA, Taneda S, Richey PL, Miyata S, Yan SD, Stern D, Sayre LM, Monnier VM, Perry G. Advanced Maillard reaction end-products are associated with Alzheimer-disease pathology. Proc Natl Acad Sci USA 91: 5710 –5714, 1994. 297. Sokolov Y, Kozak JA, Kayed R, Chanturiya A, Glabe C, Hall JE. Soluble amyloid oligomers increase bilayer conductance by altering dielectric structure. J Gen Physiol 128: 637– 647, 2006. 298. Song WL, Lawson JA, Reilly D, Rokach J, Chang CT, Giasson B, FitzGerald GA. Neurofurans, novel indices of oxidant stress derived from docosahexaenoic acid. J Biol Chem 283: 6 –16, 2008. 299. Soscia SJ, Kirby JE, Washicosky KJ, Tucker SM, Ingelsson M, Hyman B, Burton MA, Goldstein LE, Duong S, Tanzi RE, Moir RD. The Alzheimer’s disease-associated amyloid -protein is an antimicrobial peptide. PLoS ONE 5: e9505, 2010. 300. Sparks DL, Scheff SW, Hunsaker JC, Liu HC, Landers T, Gross DR. Induction of Alzheimer-like beta-amyloid immunoreactivity in the brains of rabbits with dietary-cholesterol. Exp Neurol 126: 88 –94, 1994. PHYSIOLOGY • Volume 26 • February 2011 • www.physiologyonline.org 67 Downloaded from http://physiologyonline.physiology.org/ by 10.220.32.247 on June 15, 2017 259. Quist A, Doudevski L, Lin H, Azimova R, Ng D, Frangione B, Kagan B, Ghiso J, Lal R. Amyloid ion channels: a common structural link for proteinmisfolding disease. Proc Natl Acad Sci USA 102: 10427–10432, 2005. 271. Sanan DA, Weisgraber KH, Russell SJ, Mahley RW, Huang D, Saunders A, Schmechel D, Wisniewski T, Frangione B, Roses AD, Strittmatter WJ. Apolipoprotein-E associates with beta-amyloid peptide of Alzheimers-disease to form novel monofibrils: isoform Apoe4 associates more Efficiently than Apoe3. J Clin Invest 94: 860 – 869, 1994. REVIEWS 301. Stewart CR, Wilson LM, Zhang Q, Pham CLL, Waddington LJ, Staples MK, Stapleton D, Kelly JW, Howlett GJ. Oxidized cholesterol metabolites found in human atherosclerotic lesions promote apolipoprotein C-II amyloid fibril formation. Biochemistry 46: 5552–5561, 2007. 302. Stokin GB, Lillo C, Falzone TL, Brusch RG, Rockenstein E, Mount SL, Raman R, Davies P, Masliah E, Williams DS, Goldstein LSB. Axonopathy and transport deficits early in the pathogenesis of Alzheimer’s disease. Science 307: 1282–1288, 2005. 303. Stratman NC, Castle CK, Taylor BM, Epps DE, Melchior GW, Carter DB. Isoform-specific interactions of human apolipoprotein E to an intermediate conformation of human Alzheimer amyloidbeta peptide. Chem Phys Lipids 137: 52– 61, 2005. 305. Streltsov VA. X-ray absorption and diffraction studies of the metal binding sites in amyloid beta-peptide. Eur Biophys J 37: 257–263, 2008. 306. Streltsov VA, Titmuss SJ, Epa VC, Barnham KJ, Masters CL, Varghese JN. The structure of the amyloid-beta peptide high-affinity copper II binding site in Alzheimer disease. Biophys J 95: 3447–3456, 2008. 307. Strittmatter WJ, Weisgraber KH, Huang DY, Dong LM, Salvesen GS, Pericakvance M, Schmechel D, Saunders AM, Goldgaber D, Roses AD. Binding of human apolipoprotein-E to synthetic amyloid-beta peptide: isoform-specific effects and implications for late-onset Alzheimerdisease. Proc Natl Acad Sci USA 90: 8098 – 8102, 1993. 308. Subasinghe S, Unabia S, Barrow CJ, Mok SS, Aguilar MI, Small DH. Cholesterol is necessary both for the toxic effect of A beta peptides on vascular smooth muscle cells and for A beta binding to vascular smooth muscle cell membranes. J Neurochem 84: 471– 479, 2003. 309. Sultana R, Butterfield DA. Oxidatively modified GST and MRP1 in Alzheimer’s disease brain: implications for accumulation of reactive lipid peroxidation products. Neurochem Res 29: 2215– 2220, 2004. 310. Surewicz WK, Mantsch HH. The conformation of dynorphin A-(1-13) in aqueous solution as studied by Fourier transform infrared spectroscopy. J Mol Struct 214, 143–147, 1989. 311. Svennerholm L, Gottfries CG. Membrane-lipids, selectively diminished in Alzheimer brains, suggest synapse loss as a primary event in early-onset form (type-I) and demyelination in late-onset form (typeII). J Neurochem 62: 1039 –1047, 1994. 312. Tamaoka A, Miyatake F, Matsuno S, Ishii K, Nagase S, Sahara N, Ono S, Mori H, Wakabayashi K, Tsuji S, Takahashi H, Shoji S. Apolipoprotein E allele-dependent antioxidant activity in brains with Alzheimer’s disease. Neurol 54: 2319 –2321, 2000. 313. Terzi E, Holzemann G, Seelig J. Alzheimer betaamyloid peptide 25-35: electrostatic interactions with phospholipid membranes. Biochemistry 33: 7434 –7441, 1994. 314. Terzi E, Holzemann G, Seelig J. Self-association of beta-amyloid peptide (1-40) in solution and binding to lipid membranes. J Mol Biol 252: 633– 642, 1995. 315. Terzi E, Holzemann G, Seelig J. Interaction of Alzheimer beta-amyloid peptide(1-40) with lipid membranes. Biochemistry 36: 14845–14852, 1997. 68 317. Tien M, Berlett BS, Levine RL, Chock PB, Stadtman ER. Peroxynitrite-mediated modification of proteins at physiological carbon dioxide concentration: pH dependence of carbonyl formation, tyrosine nitration, and methionine oxidation. Proc Natl Acad Sci USA 96: 7809 –7814, 1999. 318. Tomiyama T, Matsuyama S, Iso H, Umeda T, Takuma H, Ohnishi K, Ishibashi K, Teraoka R, Sakama N, Yamashita T, Nishitsuji K, Ito K, Shimada H, Lambert MP, Klein WL, Mori H. A mouse model of amyloid  oligomers: their contribution to synaptic alteration, abnormal tau phosphorylation, glial activation, and neuronal loss in vivo. J Neurosci 30: 4845– 4856, 2010. 319. Torp R, Head E, Milgram NW, Hahn F, Ottersen OP, Cotman CW. Ultrastructural evidence of fibrillar beta-amyloid associated with neuronal membranes in behaviorally characterized aged dog brains. Neuroscience 96: 495–506, 2000. 320. Townsend M, Shankar GM, Mehta T, Walsh DM, Selkoe DJ. Effects of secreted oligomers of amyloid beta-protein on hippocampal synaptic plasticity: a potent role for trimers. J Physiol 572: 477– 492, 2006. 321. Treiber C, Quadir MA, Voigt P, Radowski M, Xu SJ, Munter LM, Bayer TA, Schaefer M, Haag R, Multhaup G. Cellular copper import by nanocarrier systems, intracellular availability, and effects on amyloid beta peptide secretion. Biochemistry 48: 4273– 4284, 2009. 322. Trojanowski JQ, Lee VM. The role of tau in Alzheimer’s disease. Med Clin North Am 86: 615– 627, 2002. 323. Tully AM, Roche HM, Doyle R, Fallon C, Bruce I, Lawlor B, Coakley D, Gibney MJ. Low serum cholesteryl ester-docosahexaenoic acid levels in Alzheimer’s disease: a case-control study. Br J Nutr 89: 483– 489, 2003. 324. Uchida K. Current status of acrolein as a lipid peroxidation product. Trends Cardiovasc Med 9: 109 –113, 1999. 325. Uchida K. 4-Hydroxy-2-nonenal: a product and mediator of oxidative stress. Prog Lipid Res 42: 318 –343, 2003. 326. Uchida K, Kanematsu M, Morimitsu Y, Osawa T, Noguchi N, Niki E. Acrolein is a product of lipid peroxidation reaction: formation of free acrolein and its conjugate with lysine residues in oxidized low density lipoproteins. J Biol Chem 273: 16058 –16066, 1998. 327. Uchida K, Kanematsu M, Sakai K, Matsuda T, Hattori N, Mizuno Y, Suzuki D, Miyata T, Noguchi N, Niki E, Osawa T. Protein-bound acrolein: potential markers for oxidative stress. Proc Natl Acad Sci USA 95: 4882– 4887, 1998. 328. Uchida K, Stadtman ER. Modification of histidineresidues in proteins by reaction with 4-hydroxynonenal. Proc Natl Acad Sci USA 89: 4544 – 4548, 1992. 329. Usui K, Hulleman JD, Paulsson JF, Siegel SJ, Powers ET, Kelly JW. Site-specific modification of Alzheimer’s peptides by cholesterol oxidation products enhances aggregation energetics and neurotoxicity. Proc Natl Acad Sci USA 106: 18563–18568, 2009. 330. Van Nostrand WE, Melchor JP, Ruffini L. Pathologic amyloid beta-protein cell surface fibril assembly on cultured human cerebrovascular smooth muscle cells. J Neurochem 70: 216 –223, 1998. PHYSIOLOGY • Volume 26 • February 2011 • www.physiologyonline.org 331. Varadarajan S, Yatin S, Aksenova M, Butterfield DA. Alzheimer’s amyloid beta-peptide-associated free radical oxidative stress and neurotoxicity. J Struct Biol 130: 184 –208, 2000. 332. Varadarajan S, Yatin S, Butterfield DA. Alzheimer’s amyloid beta peptide (1-42) fibrils are not always neurotoxic. Alzheimers Rep 3: 71–76, 2000. 333. Wahrle SE, Jiang H, Parsadanian M, Hartman RE, Bales KR, Paul SM, Holtzman DM. Deletion of Abca1 increases A beta deposition in the PDAPP transgenic mouse model of Alzheimer disease. J Biol Chem 280: 43236 – 43242, 2005. 334. Wakabayashi M, Matsuzaki K. Formation of amyloids by a beta-(1-42) on NGF-differentiated PC12 cells: roles of gangliosides and cholesterol. J Mol Biol 371: 924 –933, 2007. 335. Wakabayashi M, Okada T, Kozutsumi Y, Matsuzaki K. GM1 ganglioside-mediated accumulation of amyloid beta-protein on cell membranes. Biochem Biophys Res Commun 328: 1019 –1023, 2005. 336. Walsh DM, Klyubin I, Fadeeva JV, Cullen WK, Anwyl R, Wolfe MS, Rowan MJ, Selkoe DJ. Naturally secreted oligomers of amyloid beta protein potently inhibit hippocampal long-term potentiation in vivo. Nature 416: 535–539, 2002. 337. Walsh DM, Lomakin A, Benedek GB, Condron MM, Teplow DB. Amyloid beta-protein fibrillogenesis: detection of a protofibrillar intermediate. J Biol Chem 272: 22364 –22372, 1997. 338. Wang SSS, Rymer DL, Good TA. Reduction in cholesterol and sialic acid content protects cells from the toxic effects of beta-amyloid peptides. J Biol Chem 276: 42027– 42034, 2001. 339. Waschuk SA, Elton EA, Darabie AA, Fraser PE, McLaurin J. Cellular membrane composition defines Abeta-lipid interactions. J Biol Chem 276: 33561–33568, 2001. 340. Weisgraber KH, Shinto LH. Identification of the disulfide-linked homodimer of apolipoprotein E3 in plasma: impact on receptor-binding activity. J Biol Chem 266: 12029 –12034, 1991. 341. Widenbrant MJO, Rajadas J, Sutardja C, Fuller GG. Lipid-induced -amyloid peptide assemblage fragmentation. Biophys J 91: 4071– 4080, 2006. 342. Williams TI, Lynn BC, Markesbery WR, Lovell MA. Increased levels of 4-hydroxynonenal and acrolein, neurotoxic markers of lipid peroxidation, in the brain in mild cognitive impairment and early Alzheimer’s disease. Neurobiol Aging 27: 1094 – 1099, 2006. 343. Wisniewski T, Castano EM, Golabek A, Vogel T, Frangione B. Acceleration of Alzheimers fibril formation by apolipoprotein-E in-vitro. Am J Pathol 145: 1030 –1035, 1994. 344. Wong PT, Schauerte JA, Wisser KC, Ding H, Lee EL, Steel DG, Gafni A. Amyloid-beta membrane binding and permeabilization are distinct processes influenced separately by membrane charge and fluidity. J Mol Biol 386: 81–96, 2009. 345. Wu Y, Luo Y. Transgenic C. elegans as a model in Alzheimer’s research. Curr Alzheimer Res 2: 37– 47, 2005. 346. Yamaguchi H, Maat-Schieman MLC, van Duinen SG, Prins FA, Neeskens P, Natte R, Roos RAC. Amyloid beta protein (A beta) starts to deposit as plasma membrane-bound form in diffuse plaques of brains from hereditary cerebral hemorrhage with amyloidosis-Dutch type, Alzheimer disease and nondemented aged subjects. J Neuropath Exp Neurol 59: 723–732, 2000. 347. Yamazaki T, Chang TY, Haass C, Ihara Y. Accumulation and aggregation of amyloid beta-protein in late endosomes of Niemann-Pick type C cells. J Biol Chem 276: 4454 – 4460, 2001. Downloaded from http://physiologyonline.physiology.org/ by 10.220.32.247 on June 15, 2017 304. Strausak D, Mercer JFB, Dieter HH, Stremmel W, Multhaup G. Copper in disorders with neurological symptoms: Alzheimer’s, Menkes, and Wilson diseases. Brain Res Bull 55: 175–185, 2001. 316. Tickler AK, Smith DG, Ciccotosto GD, Tew DJ, Curtain CC, Carrington D, Masters CL, Bush AI, Cherny RA, Cappai R, Wade JD, Barnham KJ. Methylation of the imidazole side chains of the Alzheimer disease amyloid- peptide results in abolition of superoxide dismutase-like structures and inhibition of neurotoxicity. J Biol Chem 280: 13355–13363, 2005. REVIEWS 348. Yanagisawa K, Odaka A, Suzuki N, Ihara Y. GM1 ganglioside-bound amyloid beta-protein (A beta): a possible form of preamyloid in Alzheimer’s disease. Nat Med 1: 1062–1066, 1995. 349. Yang DS, Smith JD, Zhou ZM, Gandy SE, Martins RN. Characterization of the binding of amyloidbeta peptide to cell culture-derived native apolipoprotein E2, E3, and E4 isoforms and to isoforms from human plasma. J Neurochem 68: 721–725, 1997. 350. Yao JK, Wengenack TM, Curran GL, Poduslo JF. Reduced membrane lipids in the cortex of Alzheimer’s disease transgenic mice. Neurochem Res 34: 102–108, 2009. 351. Yao ZX, Drieu K, Szweda LI, Papadopoulos V. Free radicals and lipid peroxidation do not mediate beta-amyloid-induced neuronal cell death. Brain Res 847: 203–210, 1999. 353. Yip CM, McLaurin J. Amyloid-beta peptide assembly: a critical step in fibrillogenesis and membrane disruption. Biophys J 80: 1359 –1371, 2001. 360. Zhang QH, Powers ET, Nieva J, Huff ME, Dendle MA, Bieschke J, Glabe CG, Eschenmoser A, Wentworth P, Lerner RA, Kelly JW. Metaboliteinitiated protein misfolding may trigger Alzheimer’s disease. Proc Natl Acad Sci USA 101: 4752– 4757, 2004. 356. Yoshimoto N, Tasaki M, Shimanouchi T, Umakoshi H, Kuboi R. Oxidation of cholesterol catalyzed by amyloid beta-peptide (A beta)-Cu complex on lipid membrane. J Biosci Bioeng 100: 455– 459, 2005. 361. Zhou S, Zhou H, Walian PJ, Jap BK. Regulation of ␥-secretase activity in Alzheimer’s disease. Biochemistry 46: 2553–2563, 2007. 357. Zagol-Ikapitte I, Masterson TS, Amarnath V, Montine TJ, Andreasson KI, Boutaud O, Oates JA. Prostaglandin H-2-derived adducts of proteins correlate with Alzheimer’s disease severity. J Neurochem 94: 1140 –1145, 2005. 358. Zaman Z, Roche S, Fielden P, Frost PG, Niriella DC, Cayley AC. Plasma concentrations of vitamins A and E and carotenoids in Alzheimer’s disease. Age Ageing 21: 91–94, 1992. 359. Zerbinatti CV, Wahrle SE, Kim H, Cam JA, Bales K, Paul SM, Holtzman DM, Bu GJ. Apolipoprotein E and low density lipoprotein receptor-related protein facilitate intraneuronal A beta 42 accumulation in amyloid model mice. J Biol Chem 281: 36180 –36186, 2006. 362. Zommara M, Tachibana N, Mitsui K, Nakatani N, Sakono M, Ikeda I, Imaizumi K. Inhibitory effect of ethanolamine plasmalogen on iron-dependent and copper-dependent lipid-peroxidation. Free Radic Biol Med 18: 599 – 602, 1995. 363. Zou K, Gong JS, Yanagisawa K, Michikawa M. A novel function of monomeric amyloid beta-protein serving as an antioxidant molecule against metal-induced oxidative damage. J Neurosci 22: 4833– 4841, 2002. 364. Zubenko GS. Hippocampal membrane-alteration in Alzheimers-disease. Brain Res 385: 115–121, 1986. 354. Yoshiike Y, Kayed R, Milton SC, Takashima A, Glabe CG. Pore-forming proteins share structural and functional homology with amyloid oligomers. Neuromol Med 9: 270 –275, 2007. PHYSIOLOGY • Volume 26 • February 2011 • www.physiologyonline.org 69 Downloaded from http://physiologyonline.physiology.org/ by 10.220.32.247 on June 15, 2017 352. Yip CM, Darabie AA, McLaurin J. A beta 42peptide assembly on lipid bilayers. J Mol Biol 318: 97–107, 2002. 355. Yoshiike Y, Tanemura K, Murayama O, Akagi T, Murayama M, Sato S, Sun XY, Tanaka N, Takashima A. New insights on how metals disrupt amyloid beta-aggregation and their effects on amyloid-beta cytotoxicity. J Biol Chem 276: 32293–32299, 2001.
© Copyright 2026 Paperzz