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| 1 | In vitro inhibition activity of polyphenol-rich extracts from Syzygium aromaticum(L.)Merr.& Perry(Clove)buds against carbohydrate hydrolyzing enzymes linked to type 2 diabetes and Fe^(2+)-induced lipid peroxidation in rat pancreas显示文摘Objective:To investigate and compare the inhibitor)'properties)of free and bound phenolic extracts of clove bud against carbohydrate hydrolyzing enzymes(alpha-amylase&alphaglucosidase)and Fe^(2+)-induced lipid peroxidation in rat pancreas in vitro.Methods:The free phenolics were extracted with 80%.(v/v)acetone,while bound phenolics were extracted from the alkaline and acid hydrolyzed residue with ethyl acetate.Then,the interaction of the extracts with alpha-amylase and alpha-glucosidase was subsequently assessed.Thereafter,the total phenolic contents and antioxidant activities of the extracts were determined.Results:The result revealed that both extracts inhibited alpha-amylase and alpha-glucosidase in a dose-dependent manner.However,the alpha-glucosidase inhibitory activity of the extracts were significantly(P<0.05)higher than their alpha-amylase inhibitory activity.The free phenolics(31.67 mg/g)and flavonoid(17.28 mg/g)contents were significantly(P<0.05)higher than bound phenolic(23.52 mg/g)and flavonoid(13.70 mg/g)contents.Both extracts also exhibited high antioxidant activities as typified by their high reducing power,LI diphenyl-2-picrylhydrazyl(DPPH)and 2,2-azinobis-3-ethylbenzo-thiazoline-6-sulfonate(ABTS)radical scavenging abilities,as well as inhibition of Fe^(2+)-induced lipid peroxidation in rat pancreas in vitro.Conclusions:This study provides a biochemical rationale by which clove elicits therapeutic effect on type 2 diabetes. | Stephen Adeniyi Adefegha Ganiyu Oboh | 2012 | Asian Pacific Journal of Tropical Biomedicine2012，2，10： | 11 |
| 2 | Antioxidant properties of aqueous extracts of unripe Musa Paradisiaca on sodium nitroprusside induced lipid peroxidation in rat pancreas in vitro显示文摘Objective:To evaluate and compare antioxidant activities of the aqueous extracts of unripe plantain(Musa paradisiaca),assess their inhibitory action on sodium nitroprusside induced lipid peroxidation in rat pancreas in vitro and to cliaracterize the main phenolic constituents of the plantain products using gas chromatography analysis.Methods:Aqueous extracts of plantain products(raw,elastic pastry,roasted and boiled)(lour ol 0.1 g/mL(each)were used to determine their total phenol,total flavonoid,1,1 diphenyl-2 picrylhydrazyl(DPPH)and hydroxyl(OH)radical scavenging ability.The inhibitory effect of the extracts on sodium nitropmsside induced lipid peroxidation was also determined.Results:The results revealed that all the aqueous extracts showed antioxidant activity.The boiled Hour had highest DPPH and OH radical scavenging ability while raw Hour had the highest Fe^(2+)chelating ability,sodium nilroprusside inhibitor)effect and vitamin C content.The antioxidant results showed that elastic pastry had the highest total phenol and total flavonoid content.Characterization of the unripe plantain products for polyphenol contents using gas chromatography showed varied quantity of apigenin,myricetin.luteolin,capsaicin,isorhaemnetin.caffeic acid,kampferol,quercetin,p-hydroxybenzoic acid,shogaol,glycitein and gingerol per product on the spectra.Conclusions:Considering the antioxidant activities and ability to inhibit lipid peroxidation of unripe plantain,this could justify their traditional use in the management/prevention of diseases related to stress. | Sidiqat Adamson Shodehinde Ganiyu Oboh | 2013 | Asian Pacific Journal of Tropical Biomedicine2013，3，6： | 2 |
| 3 | Modulatory effects of dietary inclusion of garlic(Allium sativum) on gentamycin-induced hepatotoxicity and oxidative stress in rats显示文摘Objective:To investigate die ameliorative effect of dietary inclusion of garlic(Allium sativum)on gentamycin-induced hepatotoxicity in rats.Methods:Adult male rats were randomly divided into four groups with sis animals in each group.Groups 1 and 2 were fed basal diet while Groups 3 and 4 were fed diets containing 2%and 4%garlic respeetively for 27 d prior to gentamycin administration.Hepatotoxicity was induced by the intraperitoneal administration at gentamycin(100 mg/kg body weight)for 3 d.The liver and plasma were studied for hepatotoxicity and antioxidant indices.Results:Gentamycin induces hepatic damage as revealed by significant(P<0.05)elevation of liver damage marker enzymes(aspartate transaminase and alanine aminotransferase)and reduction in plasma albumin level.Gentamycin also eaused a significant(P<0.05)alteration in plasma and liver enzymatic(catalase,glutathione and super oxygen dehydrogenises)and non-enzymatic(glutathione and vitamin C)antioxidant indices with concomitant increase in the malondialdehyde content;however,there was a significant(P<0.05)restoration of the antioxidant status coupled with significant(P<0.05)decrease in the tissues malondialdehyde content,following consumption of diets containing garlic.Conclusions:These results suggest that dietary inclusion of garlic powder could protect against gentamycin-induced hepatotoxicity,improve antioxidant status and modulate oxidative stress;a function attributed to their phenolic constituents. | Adedayo O Ademiluyi Ganiyu oboh Tosin R Owoloye Oluwaseun J Agbebi | 2013 | Asian Pacific Journal of Tropical Biomedicine2013，3，6： | 1 |
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