JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL SCIENCES Emmanuel I. Ugwuja, Nicholas C. Ugwu, Uche E. Nwachi. Hematological and biochemical parameters of diabetic rats administered either energy drink alone or energy drink mixed with alcohol. Journal of pharmaceutical and biomedical sciences (J Pharm Biomed Sci.) 2013 October; 35(35): 1808-1813. The online version of this article, along with updated information and services, is located on the World Wide Web at: www.jpbms.info Journal of Pharmaceutical and Biomedical Sciences (J Pharm Biomed Sci.), Member journal. Committee of Publication ethics (COPE) and Journal donation project (JDP). ISSN NO- 2230 – 7885 CODEN JPBSCT NLM Title: J Pharm Biomed Sci. Emmanuel I. Ugwuja, Nicholas C. Ugwu, Uche E. Nwachi. Original article Hematological and biochemical parameters of diabetic rats administered either energy drink alone or energy drink mixed with alcohol Emmanuel I. Ugwuja1,2 *, Nicholas C. Ugwu1, Uche E. Nwachi 3 Affiliation:1 Departments of Chemical Pathology, Ebonyi State University, P. M. B. 053 Abakaliki, Nigeria 2 Department of Biochemistry, Faculty of Biological Sciences, Ebonyi State University, P. M. B. 053 Abakaliki, Nigeria 3 Department of Medical Biochemistry, Faculty of Basic Medical Sciences, Ebonyi State University, P. M. B. 053 Abakaliki, Nigeria The name of the Department and Institution to which the work should be attributed:Departments of Chemical Pathology Department of Biochemistry Department of Medical Biochemistry Ebonyi State University, P. M. B. 053 Abakaliki, Nigeria Core Idea: Consumption of either energy drink alone or in combination with alcohol is gaining prominence, especially among the youths and athletes despite their safety concern. The practice has permeated the elderly population, who is more vulnerable to diabetes mellitus, with unverified claims that they contain low sugar and as well ameliorates the toxic effect of alcohol. The idea of th e presen t study was to highlight the haematological and biochemical alterations associated with such practices in diabetic model, as no scientific evidence is available to unsuspecting consumers. *Correspondence to: Emmanuel I. Ugwuja. Departments of Chemical Pathology, Ebonyi State University, P. M. B. 053 Abakaliki, Nigeria; E-mail: [email protected] Abstract: Consumption of either energy drink alone or in combination with alcohol is gaini ng popularity despite concerns of their s afety. The present study investigated the hematological and biochemical parameters of diabetic rats administered either energy drink alone (ED) or energy drink mixed with alcohol EDmA). Twenty male albino rats weighi ng 172-185g grouped into four (A-D) of five rats per group were investi gated. Rats in groups A, B and C were made diabetic by intraperitoneal injection of alloxan (200mg/Kg body weight). Groups A and B rats were administered 3.75ml /Kg Bullet® and 3.75ml/Kg Bullet® + 1.0g/Kg alcohol, respectively while rats in groups C and D were given water only and acted as diabetic (DC) and non-diabetic (NDC) controls, res pectively. The experiment lasted for 30 days after which the rats were killed and their blood collected for hematological and biochemical parameters using standard methods. Results showed that di abetic rats administered either energy drink alone or energy drink mixed with alcohol exhibi ted alterations in both haematological and biochemical parameters, but significant effects were observed only in rats admi nistered energy drinks mixed with alcohol. It may be concluded that the biochemical derangements associated with diabetes mellitus and/or consumption of energy drink may be exacerbated by alcohol. Key words: Energy drinks ; alcohol; diabetes mellitus, biochemical derangement; dyslipidaemia. Article citation:Emmanuel I. Ugwuja, Nicholas C. Ugwu,Uche E. Nwachi. Hematological and biochemical parameters of diabetic rats administered either energy drink alone or energy drink mixed with alcohol. Journal of pharmaceutical and biomedical sciences (J Pharm Biomed Sci.) 2013 October; 35(35): 1808-1813. Available at http: //www.jpbms.info. 1808 ISSN NO- 2230 – 7885 CODEN JPBSCT NLM Title: J Pharm Biomed Sci. Emmanuel I. Ugwuja, Nicholas C. Ugwu, Uche E. Nwachi. INTRODUCTION onsumption of energy drinks alone or in combination with alcohol is becoming a common practice, especially among the athl etes, teenagers and students 1. It is estimated that energy drink cons umption among adol escent and middle-aged popul ation between 2001-2008 ranged from 24-56% 2. Also, a survey of energy drink consumption among student athletes in Ghana rev ealed that 62.2% consumed at l east one can of energy dri nk in a week of which 53.6% reported that they did so to replenish lost energy after training and competition3.Other reasons given for consumption of energy drinks included: to provide energy and fluid to the body, to improv e performance, and to reduce fati gue. Recently there is preponderance of young adults and elderly consuming energy drink mixed wi th alcohol with unverified claims that they contai n low sugar and as well ameliorates the toxic effect of alcohol. For instance, it has been reported that about 20-40% of young people consume energy drink mixed wit h alcohol while partying4. Most energy drinks hav e large amount of caffeine, tauri ne and sugar with variable quantities of guarana, ginseng, and B complex vitamins as their constituents 2. Although reports on the safety of energy drink are still inconclusive, consumption of energy drinks contai ning high and unregulated amounts of caffeine has been associated with serious advers e effects, such as s eizures, diabetes mellitus, cardiac abnormaliti es or mood and behavioural disorders, particularly in children, adolescents and young adults and thos e who take certain medications 5. With the consumption of either energy drink alone or in combination with alcohol gaining popularity among the young and elderly peopl e there is need to provide scientific evidence of their safety or otherwise. Previous study has shown that rats administered energy dri nk had alterations in thei r biochemical parameters without histopathological abnormaliti es of the brain, heart and liver6. We hypothesise that biochemical alterations in diabetic rats administered either energy dri nk alone or energy drink mixed with alcohol would be exacerbated. Hence the present study aimed at evaluating the haematological and biochemical parameters of diabetic rats administered either energy drink alone or energy drink mixed with alcohol. C MATERIALS AND METHODS Animals and induction of diabetes mellitus: 1809 Twenty male albino rats wei ghing 172-185g used for this study were purchased from animal hous e of the Department of Pharmacy, University of Nigeri a Nsukka. The rats were randomly assigned into four groups (A-D) of five rats per group in a cage and housed in the animal hous e of Biochemistry Department of Ebonyi State University, Abakaliki. The animals were allowed to acclimatise for 7 days under standard environmental conditions and maintained on a regular livestock feed (Pfizer Plc, Lagos, Nigeri a) and water ad libitum. Rats in groups A, B and C were made diabetic by intraperitoneal injection of 200 mg/Kg body weight of alloxan dissolved in distilled water. Fasting blood glucose levels were measured after three days of alloxan i njection with a glucometer (ACCUTREND GC (Boerhinger, Mannheim, Germany), using blood from the tail tips and diabetes mellitus was confi rmed by elevated blood glucose >7.8 mmol/l. Using a modified protocol of Ferreira et al. , Seven(7) rats in groups A (ED) were orally administered energy drink only (3.75ml/Kg Bullet®) while group B rats (EDmA) were admi nistered energy drink mixed with alcohol (3.75ml/Kg Bullet® + 1.0g/Kg alcohol). Rats in groups C (DC) and D (ND C) acted as diabetic and non-diabetic control, respectively and were given only water. The experiment las ted for 30 days after which the animals were fasted for 12 hours before they were s acrificed and thei r blood collected for haematological and biochemical analyses. All the rats received human care in accordance with the National Ins titute of Health guidelines for the care and use of laboratory animals 8. Blood for hematological parameters and lipid profile was collected in EDTA bottl es while blood for other biochemical parameters was collected in plai n bottles. Immediately the haematological parameters were compl eted, the samples were s pun i n a laboratory centrifuge at 2000g for five minutes and plasma and serum separated and stored at -4°C prior to analysis. All the analyses were done wi thin 24 hours of sampl e collection. Laboratory an alyses: Hematological parameters including packed cell volume (PCV), hemoglobin concentration (HBC) and total white blood cell counts (TWBC) w ere done as described by Dacie and Lewis 9.Serum calcium (Ca) was determi ned by atomic absorption spectrophotometer while sodium (Na+) and potassium (K+) were determined using flame ISSN NO- 2230 – 7885 CODEN JPBSCT NLM Title: J Pharm Biomed Sci. Emmanuel I. Ugwuja, Nicholas C. Ugwu, Uche E. Nwachi. photometers. Serum albumin was determined by colorimetric bromocresol green methods 10 as described previously, while uric acid was determined by uricas e method as described by Fossati et al. 11 Serum urea was determined by the method described by Jung et al. 12 and creatinine estimation was done by method originally described by Benedict and Behie13 and reev aluated by Stevens et al. 14.Total cholesterol and tri glyceride concentrations were determi ned by enzymatic colorimetric assay as described previously 15,16 and HDL-cholesterol was determined enzymatically after precipitation of other lipoprotein as described by Warnic et al. 17 while LDL-cholesterol was calculated using Friedewald equation18. Serum Alanine transaminase (ALT), Aspartate transminas es (AST), alkaline phosphatase (ALP) and bilirubin were determined using test kits (Randox Laboratori es, UK) in accordance with manufacturer’s instructions. Data analysis: The data generated were analyzed with Statistical Package for Social Sciences (SPSS® for Windows® ver. 16). Results were expressed as mean ± standard deviation with differences between means determined by one way analysis of variance (one-way ANOVA. Statistical significance was achieved at p-v alues < 0. RESULTS Table 1 shows changes in body weight and blood glucose of the experimental animals. Diabetic rats in general gai ned wei ght but the weight gain i n diabetic rats administered either energy dri nk alone or energy drink mixed with alcohol are comparable with that of the diabetic control (4. 0 % and 4.5% vs. 4. 0%, respectively) while non diabetic control rats showed a hi gher weight gai n (7.4%). Howev er, blood glucose of diabetic rats administered ei ther energy drink alone or energy drink mixed wi th alcohol was higher than the diabetic control (30.5% and 25.0% vs. 22.2%, respectively) while the non-diabetic control showed an increase of blood glucos e concentration of 2.6% only. Table 1. Effects of consumption of either energy drink alone or energy drink mixed with alcohol on body weight and plasma glucose of diabetic rats Experimental groups Parameters ED EDmA DC NC Body weight (g) Initial 165.6 ± 2.3 170.2 ± 3.5 173.4 ± 2.8 169.8 ± 4.3 Final 172.2 ± 1.5 177.8 ± 2.1 180.4 ± 2.2 182.4 ± 2.6 Change (%) +6.6 (4.0) +7.6 (4.5) +7 (4.0) +12.6 (7.4) Plasma glucose (mmol/l Initial 8.75 ± 0.15 8.92 ± 0.21 8.82 ± 0.23 4.98 ± 1.10 Final 11.42 ± 1.23 11.15 ± 1.21 10.78 ± 0.72 5.11 ± 0.13 Change (%) 2.67 (30.5) 2.23 (25.0) 1.96 (22.2) 0.13 (2.6) ED: Energy drink alone; EDmA: Energy drink mixed with alcohol; DC: Diabetic control; NDC: Non-diabetic control. Values are mean ± standard deviation. From table 2, lower values were obs erved for haematological parameters in diabetic rats administered either energy drink alone or energy drink mixed with alcohol in comparison to ei ther the di abetic control or non-di abetic control, although the differences were not statistically significant. Table 2. Hematological parameters of diabetic rats administered either energy drink alone or energy drink mixed with alcohol Experimental groups Parameters ED EDmA DC NC PCV (%) 44.3 ± 2.6 41.3 ± 1.7 45.5 ± 5.3 51.0 ± 3.7 HBC (g/dl) 14.7.3 ± 1.2 13.6 ± 0.5 15.1 ± 1.6 16.9 ± 1.2 TWBC (x109/l) 4.9 ± 0.2 5.1 ± 0.5 5.0 ± 0.5 5.4 ± 1.4 PCV: Packed cell volume; HBC: Hemoglobin concentration; TWBC: Total white blood cell count; ED: Energy drink alone; EDmA: Energy drink mixed with alcohol; DC: Diabetic control; NDC: Non-diabetic control. Values are mean ± standard deviation . Table 3 shows the effects of either energy dri nk alone or energy drink mixed with alcohol. Significantly (p < 0.05) hi gher serum albumin and alanine transaminase (ALT) were observ ed i n 1810 diabetic rats administered energy drink mixed with alcohol in comparison to either the non diabetic and diabetic controls, respectively. However, while comparative as partate ISSN NO- 2230 – 7885 CODEN JPBSCT NLM Title: J Pharm Biomed Sci. Emmanuel I. Ugwuja, Nicholas C. Ugwu, Uche E. Nwachi. transaminase (AST) and alkaline phosphatas e (ALP) activities were observ ed in di abetic rats administered energy drink alone and the controls (non-diabetic and diabetic), significantly higher activities of the two enzymes were recorded in diabetic rats administered energy drink mixed with alcohol. In the same vein, while higher (p < 0.05) serum total bilirubi n was recorded in diabetic rats administered energy drink mixed with alcohol, comparable v alues were observ ed i n diabetic rats fed with energy drink alone and the controls. Table 3. Liver function parameters of diabetic rats administered either energy drink alone or energy drink mixed with alcohol. Experimental groups ED EDmA DC NC Parameters Albumin (g/dl) 3.7 ± 1.3a 5.1 ± 0.4b 4.5 ± 0.2a 3.4 ± 0.5a ALT (U/L) 11.3 ± 2.2a 15.8 ± 1.5b 12.5 ± 1.3a 9.5 ± 1.3a AST (U/L) 10.0 ± 2.2a 14.0 ± 1.8b 10.5 ± 1.2a 11.5 ± 2.4a ALP (U/L) 29.8 ± 3.4a 37.0 ± 9.2b 31.5 ± 2.9a 28.8 ± 2.8a T. Bil (µmol/l) 12.3 ± 0.8a 17.4 ± 2.7b 14.8 ± 2.3a 12.8 ± 1.2a ED: Energy drink alone; EDmA: Energy drink mixed with alcohol; DC: Diabetic control; NDC: Non-diabetic control. Values are mean ± standard deviation. Values with different superscript along the row are statistically (p < 0.05) significant. While serum sodium was not significantly affected by consumption of either energy drink alone or its combination with alcohol, significantly higher values of serum potassium were observ ed i n diabetic rats administered energy drink mixed with alcohol and diabetic control in comparison to either diabetic rats fed energy drink alone or the non-diabetic control (Table 4). Again, while comparable serum creatinine was observed in all the groups, and serum urea was not significantly different in either diabetic rats fed energy dri nk alone or the two controls (diabetic and non- diabetic),significantly higher serum urea was found in diabetic rats administered a combination of energy drink and alcohol. Serum calcium did not show any significant difference among the groups, but higher (p < 0.05) uric acid level was recorded in diabetic rats administered energy drink mixed with alcohol in comparison to those fed energy drink alone. However, significantly higher s erum uric acid levels were observed in diabetic and non diabetic control when compared with either diabetic rats on energy drink alone or those on energy drink mixed with alcohol (Table 4). Table 4. Plasma electrolytes, and renal function parameters of diabetic rats administered energy drink alone or energy drink mixed with alcohol Experimental groups ED EDmA DC NC Parameters + a b b K (mmol/l) 3.37 ± 0.60 3.78 ± 0.46 3.89 ± 2.79 3.29 ± 0.24a Na+ (mmol/l) 100.9 ± 9.8 102.4 ± 3.0 97.5 ± 2.8 99.7 ± 1.7 Ca++ (µmol/l) 2.06 ± 0.13 2.10 ± 0.35 2.02 ± 0.93 1.97 ± 0.27 Urea (mmol/l) 2.40 ± 0.59a 4.03 ± 1.05b 2.60 ± 0.52a 2.35 ± 0.58a Creatinine (µmol/l) 27.9 ± 4.0 30.4 ± 2.3 26.0 ± 4.6 26.2 ± 5.4 Uric acid (µmol/l) 115.5 ± 6.5a 133.3 ± 10.3b 145.8 ± 0.5c 140.5 ± 22.0c ED: Energy drink alone; EDmA: Energy drink mixed with alcohol; DC: Diabetic control; NDC: Non-diabetic control. Values are mean ± standard deviation. Values with different superscript along the row are statistically (p < 0.05) significant. From Table 5, while consumption of either energy drink alone or its combination with alcohol has no significant effect on the plasma total cholesterol, LDL-cholesterol and triglyceride, significantly lower (p > 0.05) plasma HDL -cholesterol was found in diabetic rats administered energy dri nk mixed wi th alcohol in comparison to other groups. Table 5. Lipid profile of diabetic rats administered energy drink alone or energy drink mixed with alcohol Experimental groups ED EDmA DC NC Parameters (mmol/l) Total cholesterol 4.6 ± 0.5 4.6 ± 0.2 5.3 ± 1.9 4.2 ± 0.2 HDL-Cholesterol 0.76 ± 0.12a 0.49 ± 0.10b 0.79 ± 0.07a 0.79 ± 0.12a LDL-Cholesterol 2.3 ± 0.5 2.0 ± 0.1 2.3 ± 0.3 1.4 ± 0.1 Triglyceride 1.8 ± 0.1 2.0 ± 0.2 1.5 ± 0.1 1.4 ± 0.1 ED: Energy drink alone; EDmA: Energy drink mixed with alcohol; DC: Diabetic control; NDC: Non-diabetic control. Values are mean ± standard deviation. Values with different superscript along the row are statistically (p < 0.05) significant. 1811 ISSN NO- 2230 – 7885 CODEN JPBSCT NLM Title: J Pharm Biomed Sci. Emmanuel I. Ugwuja, Nicholas C. Ugwu, Uche E. Nwachi. DISCUSSION Based on critical analyses of literatures on the safety and efficacy of the use of energy drink, the International Society of Sport Nutri tion (ISSN) recently recommended amongst others, that diabetics and individual with pre-existing cardiovascular, metabolic, hepato-renal and neurologic disease who are taking medications that may be affected by hi gh glycaemic load foods, caffeine, and or other stimulants should avoid us e of energy drinks unl ess approved by thei r Physician19. Data from the present study seem to support this warning as diabetic rats administered either energy dri nk alone or energy drink mixed with alcohol exhibited alterations in both hematological and biochemical parameters, but significant effects were observed only for rats administered energy dri nks mixed with alcohol. The higher plasma glucose levels and lower values of hematological parameters observed in rats administered either ED alone or EDmA in comparison to diabetic and non-diabetic controls in the pres ent study, though insignificant, sugges t possible detrimental effects of either dri nks to the body systems. For the diabetic rats, consumption of energy drink may have caused the higher values for plasma glucose levels in comparison to the non diabetic rats due to absence of insulin to handle the extra glycemic challenge. On the other hand, the observed lower hematological parameter (PCV) reflects the negative association between hyperglycemia and hematocrit levels 20,21 as no previous association between energy dri nk consumption and erythropoiesis was encountered. The significantly elevated levels of liver function parameters (ALT, AST, ALP and total bilirubi n) observed in diabetes rats administered energy drink mixed wi th alcohol in comparison to thos e administered energy drink alone and the controls points to the fact that alcohol worsens biochemical derangements associated wi th consumption of energy dri nk. Previously, Ebuehi et al. 6 had demonstrated that consumption of energy dri nk was associated with decreased ALT and AST. This is in contrast to the present fi ndings. In that study 6, consumption of energy drink alone was investigated, unlike the present study, which involved consumption of energy drink mixed with alcohol. It can therefore be argued that the significant elevation of liver function parameters observed in rats administered energy drink plus alcohol in the present study may have been due to the effect of alcohol. Consumption of energy dri nk with alcohol has been associated with i ncreased 1812 risk of serious i njury, sexual assault, drink -driving alcohol-related health consequences.4 Alcohol consumption has been found to precipitate liver injury through complex mol ecular mechanisms including genetic predisposition, nutri tional status, abnormaliti es in energy metabolism, oxidative stress, and immunological mechanisms amongs t other factors 22. The pres ent findings may hav e public health implications for thos e that are forming the habi ts of combining energy drink with alcohol with erroneous belief that it ameliorates the effects of alcohol. The el evated liver enzymes observed in rats administered energy drink plus alcohol sugges ts advers e effects of the drink on the liver. Although assessment of liver histopathology was not part of the pres ent study, in futu re studies this may help unrav el the i nvolvement of liver injury associated with consumption of energy drink mixed with alcohol. Interestingly, in contras t to the findings of Ebuehi et al. 6 which demonstrated decreased plasma albumi n with energy drink consumption, in the present study increased serum albumi n was observ ed in rats administered energy drink plus alcohol. The possible explanation may be that the alcohol in the mixture may have exacerbated dehydration by excessive diuresis with consequent increase in serum proteins, including albumin. Thus it could be inferred that consumption of either energy dri nk alone or energy drink mixed with alcohol could worsen the dehydration associated with diabetes. This may also explain the less wei ght gai n observed in diabetic rats when compared to the non-diabetic rats obs erved in the present study. Significantly elevated plasma potassium in rats administered energy drink plus alcohol observed in the present s tudy has important health implication. Potassium is a very important electrolyte in heart functioning, as ei ther low or high s erum potassium levels may lead to cardiac abnormaliti es. It has previously been reported that long-term exposure to the various components of energy beverages may result in significant alterations in the cardiovascular system 23. Furthermore, elevated serum urea, and potassium in rats administered energy drinks plus alcohol i n comparison to controls suggests renal involvement. Urea is a product of protei n metabolism, which is accumulated in the blood when the kidneys are affected. Although the mechanism by which energy drink mixed with alcohol precipi tate or/induce cardiac and renal impairments is not clear, i t may partly be through ISSN NO- 2230 – 7885 CODEN JPBSCT NLM Title: J Pharm Biomed Sci. Emmanuel I. Ugwuja, Nicholas C. Ugwu, Uche E. Nwachi. alterations in serum potassium. Hence it may equally be argued that the cardi ac abnormalities previously associated with consumption of energy drink mixed with alcohol might in part have been mediated through the alteration in s erum potassium. Agai n, in the present study, diabetic rats administered energy drink mixed with alcohol had significantly lower HDL -cholesterol (good cholesterol) in comparison to diabetic rats administered energy drink alone or the controls. Hence i n addition to perturbation of s erum potassium, the cardiac abnormalities previously associated wi th consumption of energy drink plus alcohol may also in part hav e been due to disorder in lipid metabolism as dyslipidaemia has been associated with cardiac abnormalities 24. It may be speculated that the reduced HDL-cholesterol observed in the present s tudy is due to the effects of alcohol as comparable values were observed for rats administered energy dink alone, the di abetic control and the non-di abetic control. CONCLUSION It may therefore be concluded that alcohol i n a mixture of energy drink and alcohol may worsen biochemical derangements associated with consumption of energy dri nk or/and in diabetics. We advocate intensive public health education to correct the already formed misconception of lack of adv erse effects of either energy dri nks alone or its combination with alcohol. REFERENCES 1.Usman A and Jawaid A: Hypertension in a young boy: an energy drink effect. BMC Res Notes 2012; 5: 591. 2.Ballard SL, Wellborn-Kim JJ and Clauson KA: Effects of commercial energy drink consumption on athletic performance and body composition. 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