Egypt. J. Exp. Biol. (Bot.), 11(2): 147 – 153 (2015) © The Egyptian Society of Experimental Biology RESEARCH ARTICLE L a i l a Me k k i Ha s s a n Ma n s o u r E l -S a yd a Ga ma l E l d e a n A ma l A b d e l N a s s e r EVALUATION OF ANTI -GENOTOXICITY OF THE ETHANOLIC PLANT EXTRACT OF BETA VULGARIS MARITIMA USING ALLIUM CEPA ROOT ASSAY ABSTRACT: Beta vulgaris L. subsp. maritime (Chenopodiaceae) is widely distributed throughout the world and used as an old medicinal plant and traditional food. Red beet (Beta vulgaris L.) plant is a rich source of phenolic compounds, which decrease oxidative damage of lipids and improve antioxidant status in humans. Anti -mutagenic effects of ethanolic extract prepared using dried wild plants of Beta vulgaris subsp. maritima was studied. Allium cepa root tip meristem cells treated with Magnesium sulfate (MgSO 4 .7H 2 O) as mutagenic substance at concentration 0.3%, which induced the highest number of aberrations in Allium cepa root tip cells. Three types of treatments were applied, pre, post and simultaneous treatment. In the pre -treatment, roots were treated with different concentrations of plant ethanolic extract (0.1%, 0.5%, and 1%), separately for 3 h each, followed by treatment with 0.3% MgSO 4 7H 2 O for 3 hours. The post treatment, roots were first treated with 0.3% MgSO 4 .7H 2 O for 3 h followed by the different concentrations of the ethanolic plant extract (0.1%, 0.5%, and 1%) In the simultaneous treatment, Allium cepa roots were treated with 0.3% MgSO 4 .7H 2 O and different concentrations of plant ethanolic extract (0.1%, 0.5%, and 1%) at the same time. For controls, roots were treated with 0.3% MgSO 4 .7H 2 O for 3 hr. and distilled water served as positive and negative control, respectively. The data were statistically analyzed which revealed that the ethanol plant extract modulated the genotoxic and clastogenic mutations, which were induced by MgSO 4 .7H 2 O. The inhibition activity of the highest concentration 1% of plant ethanol extract with the post treatment was 55.4%, with pre-treatment was 69% and was 69.9 % with the simultaneous treatment. KEY WORDS: Beta vulgaris maritima, ethanol antioxidant, genotoxic mutation, ISSN: 1687-7497 extract, CORRESPONDENCE: L a i l a Me k k i Botany Department, Faculty of Science, Suez Canal University, Ismailia, Egypt E-mail: [email protected] Ha s s a n Ma n s o u r E l -S a yd a Ga ma l E l d e a n A ma l A b d e l Na s s e r Botany Department- Faculty of Science, Suez Canal University, Ismailia, Egypt ARTICLE CODE: 16.02.15 INTRODUCTION: Sea beet (Beta vulgaris maritima) family Chenopodiaceae is widely distributed throughout the world and used as an old medicinal plant and traditional food. Beet root is a potential source of valuable water-soluble nitrogenous pigments, called betalains, which comprise two main groups, the red betacyanins and the yellow On Line ISSN: 2090 - 0503 http://my.ejmanger.com/ejeb/ Egypt. J. Exp. Biol. (Bot.), 11(2): 147 – 153 (2015) 148 betaxanthins. They are free radical scavengers and prevent active oxygen induced and free radical -mediated oxidation of biological molecules (Pedreno and Escribano, 2001). Ethanol extract of beetroot pomace possesses very high contents of all investigated phenols , betalains, considerable amounts of phenolic compounds and radical scavenging activity (Pedreno and Escribano, 2001). Beet root ingestion can be one of useful means to prevent cancer (Agarwal and Majee , 2012). Kapadia et al. (1996) concluded that oral ingestion of betanin in ICR mice inhibited TPA- induced promotion of mice skin tumors. They found tumor inhibitory effect compared to control, they also tested a crude extract, there is a 60% reduction of lung tumors was found. These findings indicate that beetroot is a useful cancer preventive vegetable. Beta vulgaris L. leaves extract possess potent hepatoprotective effect against ethanol-induced hepatic toxicity and it may have a great potential role in the management of alcoholic liver disease (Jain et al., 2012). Red pigments extracted from red beet ( Beta vulgaris, L.) used as natural antioxidant (Attia et al., 2013). It is concluded that the extract of Chard (Beta vulgaris L. var. cicla) when administered by gavage may reduce blood glucose levels by regeneration of the B cells (Bolkent et al., 2000). Beets demonstrate their antioxidant uniqueness by getting their red color primarily from betalain antioxidant pigments (and not primarily from anthocyanins). Beta vulgaris L is a very good source of the antioxidant manganese and a good source of the antioxidant vitamin C, the unique phytonutrients in beets provide antioxidant support in a different way than other antioxidant-rich vegetables (Kapadia et al., 2003). Beta vulgaris subspecies cycla has potential as a good dietary source of phenolic antioxidants. Beetroot (Beta vulgaris L.) and naturally fermented beetroot juices from organic and conventional production: metabolomics, antioxidant levels and anticancer activity (Kazimierczak et al., 2014). Magnesium sulphate (MgSO 4 .7H 2 O) is a cytostatic and clastogenic compound which capable of producing various chromosomal abnormalities in higher concentration (Bhatta and Sakya, 2008). The aim of the present study is to evaluate the potential of the wild type Beta vulgaris subsp. maritima L. crude ethanol extract in modulating the genotoxicity of MgSO 4 .7H 2 O using root tips of Allium cepa assay. MATERIAL AND METHODS: Fresh and healthy plants of Sea beet (Beta vulgaris subsp. maritima) were collected ISSN: 1687-7497 from different fields in Ismailia city. Seeds of A. cepa Giza 20 were obtained from the Agricultural Research Center (ARC), Giza, Egypt. Preparation of ethanolic extract: Beta vulgaris subspecies maritima plants were washed with water, dried in the air for 24 hr. then , in the oven at 60°C for 48 hr. and then grounded to fine powder according to (Mekki, 20 14a). Fifty grams were extracted initially with 300 mL of ethanol for 24 h at 23 ± 2 °C followed by filtering with W hatman filter paper. A subsequent extraction was also carried out with the same amount of solvent for another 24 h and filtered again. Extra cts were evaporated using rotary flash evaporator. Antimutagenic potential of the extract was tested as follows: Ten milligram of dried solvent of extract was dissolved in 1 mL of ethanol and used for the preparation of different concentrations (0.1%, 0.5%, and 1%) of dilutions. Seeds of Allium cepa were germinated to primary roots of 1-2 cm long. Young roots were cut, treated with different concentrations of MgSO 4 .7H 2 O (1000-3000 ppm for 3 h) to find the maximum abnormalities (40-65%) of the total cells. The concentration of 3000 ppm MgSO4.7H 2 O was selected as positive control (induced the highest percentage of the nuclear and chromosomal aberration). Three modes of treatment were used: In the first (pre-treatment), roots were first treated with different concentrations (0.1%, 0.5%, and 1%) of ethanol extract for 3 h followed by 3000 ppm MgSO 4 .7H 2 O for 3 h. In the second (post-treatment), roots were first treated with 3000ppm MgSO 4 .7H 2 O for 3 h. followed by ethanol extract concentrations (0.1%, 0.5%, and 1%) for 3 h each. In the third (simultaneous) treatment, root tips were treated with 3000 ppm MgSO 4 .7H 2 O and different concentrations (0.1%, 0.5%, and 1%) of ethanol extract at the same time. The treatment of roots with distilled water and 3000 ppm MgSO 4 .7H 2 O served as negative and positive control, respectively. Healthy roots from at least 25 plants were used for each treatment. Root tips from the different treatment groups were processed for mitotic preparation as described by (Mekki, 2014b). Data were calculated and statistically analyzed Statistical analysis: Data were statistically analyzed by using IBM SPSS. 20.0 For window. Analysis of variance (ANOVA) was performed to determine the least significance difference (LSD) with the level of significance at P < 0.05. On Line ISSN: 2090 - 0503 http://my.ejmanger.com/ejeb/ Mekki et al., Evaluation of Anti-Genotoxicity of the Ethanolic Plant Extract of Beta Vulgaris Using Allium Cepa Root Assay RESULTS: The outcome data results for this study illustrated that MgSO 4 .7H 2 O induced genotoxic revealed in the high frequency of stickness, micronuclei, chromatin bridge and lagging chromosome. Disturbed anaphase and metaphase, chromosome and chromatid breakage C-meta and anaphase were also observed at lesser frequency (Fig. 1). The data in table 1 showed high percentage of chromosomal and nuclear abnormalities in the positive control (67.13 and 3.73%, respectively), compared to (3.5 and 0.14%) in the negative control. The data in table 1 also showed that the percentage of the total nuclear and chromosomal abnormalities in the root tip cells of Allium cepa decreased significantly associated with the increasing of the extract concentrations within each of the 149 three treatments against the positive control (Table 1 & Fig. 2). The analysis of the data also showed significant increase in the inhibition percent (%) associated with the increasing of extract concentrations from 0.1% to 1% within each treatment. At pre-treatment the inhibition percentage increased from 54.8% with conc. 0.1% to 69% with conc. 1%, at post-treatment inhibition percentage increased from 47.0% to 55.4% at conc. 0.1% and 1%, respectively. While at simultaneous-treatment inhibition percentage increased from 29.56% at conc. 0.1% to 69.89% at conc. 1% (Fig. 3). The present results illustrated that the highest inhibition percent (69.89%) was induced in the simultaneous treatment with the highest concentration 1% followed (69%) in the pretreatment with the same concentration (Table 1 & Fig. 2). Table 1. The effect of ethanol extract of beet root on mitotic index, the percentage of nuclear and chromosomal aberrations, the total percentage of aberrations and the inhibition per centage % in Allium cepa root tips tre en m at Different abnormalities percent (%) MI Bi. Multi. Lag meta. Lag ana. Total Total nuclear chromo Dist. Cbridag so-mal sticky M.&A. meta. e Abnor Abnor Total Inhibiti 1- way ANOVA on 2-Way ANOVA percent (%) Fp-value F-ratio p-value m. (%) m. (%) Control Micro. Inhibition percent (% ) Total Abnormalities negative 4691 258 5.50 0.13 0.00 0.00 0.00 0.78 0.39 1.55 0.39 0.78 0.14 3.5 3.64 positive 5000 286 5.76 3.60 0.20 0.06 5.94 11.54 11.19 25.17 4.20 9.09 3.73 67.13 70.86 Pretreatment t Total Total cells mitosi exami s ned 0.1 5000 250 5.00 1.1a 0.04 0.09 4.00 11.20 3.60 16.40 3.60 7.20 1.24 46.4 47.64 0.5 5000 237 4.74 0.7a 0.30 0.00 0.84 8.02 0.00 20.68 1.27 5.06 1.03 35.86 36.89 1 5000 274 5.48 0.6a 0.09 0.00 2.92 5.84 3.28 14.60 3.65 4.38 0.61 35.04 35.65 69 0.006* 0.09 0.17 0.990 0.008* 0.209 0.00* 47.1 -- Post-treatment one way-ANOVA - 65.5 0.001* 66.5 271 5.29 1.4a 0.18 0.00 3.32 11.07 3.69 21.40 4.80 5.54 1.38 49.82 51.2 0.5 5565 300 5.39 1.2a 0.09 0.02 2.33 11.33 5.00 21.33 3.33 5.00 1.16 48.67 49.83 5.43 a 0.7 0.10 0.01 2.94 11.03 5.51 19.12 4.04 5.15 0.9 47.79 48.69 55.4 0.019* 0.53 0.10 0.004* 29.56 5008 272 2.78 0.002* 203.3 0.0001* 833.9 8.600 45.7 190.7 0.0002* 63.8 0.0001* 1.45 0.002* 0.000* 0.1 6195 407 6.57 1.1a 0.06 0a 3.69 12.04 5.41 13.27 4.67 9.83 1.02 50.39 51.41 0.5 5765 363 6.29 0.9a 0.06 0a 1.65 9.64 2.48 10.74 4.13 5.51 0.78 34.16 34.94 1 5020 317 6.32 0.6a 0.03 0a 0.63 7.57 0.95 8.52 1.26 6.94 0.81 26.49 27.3 0.007* 0.07 one way-ANOVA - 0.049* 0.005* 5125 1 - 54.8 0.1 one way-ANOVA Simulatenous -- 21.5 0.010* 57.39 69.89 0.01** 0.194 0.002* 0.145 0.002* 0.061 0.006* * Values significant at p < 0.05 by ANOVA a Values significant at p < 0.05 by post hoc least significant (LSD) MI = mitotic index, Micro. = micronucleus, Bi. = Binuclei, Multi. = Multinuclei, Lag meta. =Lag metaphase , Lag ana. =Lag anaphase, Dist. M. & A. = Disturbed metaphase & anaphase and C - Meta. = C Metaphase ISSN: 1687-7497 On Line ISSN: 2090 - 0503 http://my.ejmanger.com/ejeb/ 150 Egypt. J. Exp. Biol. (Bot.), 11(2): 147 – 153 (2015) Fig. 1. Shows chromosomal abnormalities induced by MgSO 4 .7H 2 O in root tips cells of Allium cepa plant (16) shows different micronuclei in the different phases (1- two micronuclei in interphase, 2- Big micronucleus in interphase, 3- Micronucleus in prophase, 4- Big micronucleus in metaphase 5Micronucleus with bridge in late anaphase, 6- micronucleus in telophase), 7- Sticky metaphase, 8- Cmetaphase, 9- Disturbed metaphase with lagging , 10- Metaphase with lagging chromosomes, 11Disturbed metaphase with lost chromosome, 12- Disturbed anaphase, 13- Anaphase with multi-bridges and multi-breaks,14- C- anaphase, 15- Multipolar anaphase with vagrant chromosome Fig. 2. The inhibition percentage induced in the three different treatments with the different concentrations of ethanolic wild Beta vulgaris L. subsp. maritima plant extract ISSN: 1687-7497 On Line ISSN: 2090 - 0503 http://my.ejmanger.com/ejeb/ Mekki et al., Evaluation of Anti-Genotoxicity of the Ethanolic Plant Extract of Beta Vulgaris Using Allium Cepa Root Assay 151 Fig. 3. The percentage of total chromosomal and nuclear abnormalities in the three different treatments (pre, post and simultaneous) with the three concentrations (0.1, 0.5, and 1 %) DISCUSSION: Plant test system is widely used for monitoring genotoxicity of chemicals. Allum root tip assay is treated as an easy model for genotoxic studies (Kovalchuk et al., 1998; Cotelle et al., 1999; Yi and Meng, 2003; Mekki, 2013; Mekki, 2014a&b). Several medicinal plant extracts were tested for their antimutagenic potential (Atefi and Erdoğrul, 2003; Agar and Alpsoy, 2005; Bunkuva et al., 2005; Aqil et al., 2008; Mekki, 2014a). In the present study, MgSO 4 .7H 2 O was used as a genotoxicant in Allium cepa plant to evaluate the antigenotoxic potential of the crude ethanolic extract of Beta vulgaris L. subsp. maritime. Different kinds of chromosomal and nuclear aberrations were observed with the use of 3000 ppm concentrations of MgSO 4 .7H 2 O. The induction of aberrations might be due to disturbance in process of DNA and protein synthesis or during RNA translocation. The highest frequently chromosomal aberration observed was stickiness, chromatin bridge and lagging chromosomes. Stickness is may be due to the inhibition of spindle formation (Amer and Ali, 1986), the improper folding of chromosome fibres that makes the chromatids connected by subchromatid bridges led to form sticky chromosomes (McGill et al., 1974). The percentage of the total chromosomal and nuclear abnormalities was decreased significantly from 67.13% (chromosomal) and 3.73% ISSN: 1687-7497 (nuclear) in the positive control (Table 1) to 26.49% and 0.81%, respectively with the use of the highest concentration of beet extract in the simultaneous treatment. The inhibitory effect with using ethanol extract of beet root detected in this study can be attributed to the wide range constituents of beat root plants. The ethanol extract obtained from beet root has been already found to possess considerable amounts of phenolic compounds, betalains, vitamin C and a significant radical scavenging activity by Kujala et al. (2000, 2001, & 2002), Pyo et al. (2004), Čanadanović-Brunet et al. (2011), and Kazimierczak et al. (2014). Phenolics are believed to act as antioxidant, anti-carcinogenic, anti-microbial, antiallergic, anti-mutagenic and anti-inflammatory (Aqil et al., 2008; Chakole et al., 2011; Sharma et al., 2014). The antioxidant capacity of beet has been associated with the constitutive presence of phenolic compound. Beets are a unique source of phytonutrients called betalains, betanin and vulgaxanthin are the two best-studied betalains from beets, and both have been shown to provide antioxidant, anti-inflammatory, and detoxification support (Čanadanović-Brunet et al., 2011). Beet (Beta vulgaris) extracts used as a natural colorant for food products have been shown to possess effective antioxidant properties, reducing lipid oxidation in cooked On Line ISSN: 2090 - 0503 http://my.ejmanger.com/ejeb/ Egypt. J. Exp. Biol. (Bot.), 11(2): 147 – 153 (2015) 152 pork. Pedreno and Escribano (2001) reported that betanines have antioxidant, antimicrobial and antiviral activity. Fariss (1991) had depicted that free radicals scavenger and antioxidants are useful in protecting against toxicity. Phenolic compounds are very important plant constituents because their hydroxyl groups confer scavenging ability. Beet (Beta vulgaris) extract used as a natural colorant for food products have been shown to possess effective antioxidant properties, reducing lipid oxidation in cooked pork. (Nilsson, 1970; Mornement, 2002). There for, in the present study it is clear that the inhibition of chromosomal and nuclear aberrations with the use of ethanolic extract of Beta vulgaris subsp maritima plant is the presence of more than major phytocompounds like phenols, petalains, flavonoids and tannins which are most likely candidate for providing the antimutagenic effect. These natural compounds present in the plants may interact directly with the genotoxicant and inactivate them by chemical reaction. It is also possible that these compounds compete to interact with the nucleophilic sites in DNA, thus altering the binding of the mutagen to these sites protecting DNA from damage. However, the inhibition of mutagenesis is, often complex, acting through multiple mechanisms (Aqil et al., 2008). Premanath et al. (2011) reported that polyphenols plant components like flavonoid compounds, gallic acid and tannins can modulate effect of many genotoxicant. The study concludes that ethanol extract of Beta vulgaris maritima modulated the total aberrations induced by MgSO 4 .7H 2 O (3000 ppm) by 69.89% (simultaneous-treatment), 69.00% (pre-treatment) and 52.90% (post-treatment) at the highest concentration 1% (Figs 1, 2 & Table 1). These results agree with the previous studies of Kapadia et al. (2003), Klewicka (2010), and Premanath et al. (2011) who concluded that the antioxidative and anticarcinogenic activity of beetroot is due to betalains, and in particular betanin and isobetanin which could modulate the effect of many genotoxicant. Arkko et al. (1980) and Kapadia et al. 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Res., 537(1): 109-114. تقييم المستخلص اإليثانولى لنبات البنجر األحمر كمضاد للسمية الجينية باستخدام جذور نبات البصل أمل عبد الناصر، السيدة جمال الدين، حسن منصور،ليلى مكى مصر، جامعة قناة السويس، كلية العلوم،قسم النبات ساعات ثم معاملتهم بتركيزات3 المطفره أوال لمدة واخيرا المعامله، ساعات3 المستخلص النباتى لمدة ) حيث معامله الجذورsimultaneous-treatment( الثالثه بالماده المطفره والتركيزات المختلفه من المستخلص تم عمل. ساعات3 النباتى معا فى وقت واحد لمده ( بمعامله جذور البصلpositive control( الكنترول الموجب بكبريتات المغانسيوم المختلفة للحصول على أعلى نسبة ساعات3 ) لمده%0.3( طفرات وقد وجد أن التركيز وتم عمل الكنترول السالب.أعطى أعلى نسبة طفرات لقد. ) بمعامله الجذور بالماء المقطرnegative control( أظهر تحليل النتائج احصائيا ان المستخلص االيثانولى لنبات االبنجر البرى يقوم بتثبيط عمل المادة المطفرة ووجدت للمستخلص%1 اعلى نسب للتثبيط عند التركيز األعلى المعامله, )%52.9 ( حيث كان التثبيط فى المعامله الثانيه ) اما فى حاله المعامله الثالثة فكان معمل%69( االولى .)%69.9( التثبيط ISSN: 1687-7497 Beta vulgaris supsp. ( ينتشر نبات البنجر البرى ) والذى ينتمى للعائلة الرمراميه فى مختلفmaritima ويستخدم كنبات طبى وغذاء تقليدى،انحاء العالم ) مصدر غنىBeta vulgaris ( يعتبر البنجر االحمر.لإلنسان بالمواد الفينوليه والتى يمكنها تقليل االكسده الضاره .للدهون وتحسين الحاله كمضادات لالكسده فى االنسان لقد تم دراسه التأثير المضاد للطفرات للمستخلص حيث تم معامله،االيثانولى لنبات البنجر البرى المجفف خاليا القمم الناميه لنبات البصل كنظام بيولوجى بماده % 0.3 كبريتات الماغنسيوم كمادة مطفرة عند تركيز .حيت أحدثت نسبة عالية من الطفرات أثناء انقسام الخاليا (pre-treatment( لقد قمنا بتطبيق ثالثه معامالت؛ االولى والذى يتم فيها معامله جذور البصل بثالث تركيزات من ) لمده ثالث%1، %0.5 ، %0.1( المستخلص النباتى ، ساعات ايضا3 ساعات ثم معاملتهم بالماده المطفره لمد ( حيث معامله الجذور بالمادهpost-treatment( والثانيه On Line ISSN: 2090 - 0503 http://my.ejmanger.com/ejeb/
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