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http://dx.doi.org/10.3746/jkfn.2016.45.6.819

Anti-Diabetic, Alcohol-Metabolizing, and Hepatoprotective Activities of Moringa (Moringa oleifera Lam.) Leaf Extracts  

Choi, Young Ju (Department of Food and Nutrition, College of Medical Life Sciences, Silla University)
Jung, Kyung Im (Department of Food and Nutrition, College of Medical Life Sciences, Silla University)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.45, no.6, 2016 , pp. 819-827 More about this Journal
Abstract
This study was carried out to investigate anti-inflammatory, anti-diabetic, alcohol metabolizing, and hepatoprotective effects of hot water (MOW) and 80% ethanol (MOE) extracts from moringa (Moringa oleifera Lam.) leaf. The total phenol content of MOW and MOE were 45.49 and 63.06 mg tannic acid equivalents/g, respectively. 1,1-Diphenyl-2-picrylhydrazyl radical scavenging activities of MOW and MOE were remarkably elevated in a dose-dependent manner, and about 60.8% and 71.3% at 1 mg/mL, respectively (P<0.01). Superoxide dismutase-like activities of MOW and MOE were 2.8% and 7.4% at 5 mg/mL, respectively (P<0.05). ${\alpha}-Glucosidase$ inhibitory activity also increased in a dose-dependent manner in both extracts, and MOE was higher about two times than MOW at 5 mg/mL (P<0.001). The effects of MOW and MOE on alcohol metabolizing activity were determined by measuring generation of reduced nicotinamide adenine dinucleotide (NADH) by alcohol dehydrogenase (ADH) and acetaldehyde dehydrogenase (ALDH). ADH and ALDH activities significantly increased upon addition of MOW and MOE (P<0.05). Anti-inflammatory activity was examined in lipopolysaccharide-stimulated RAW 264.7 cells. Nitric oxide production was reduced to 32.1% and 81.2% by addition of MOW and MOE at 1 mg/mL, respectively (P<0.05). MOW and MOE showed significant protective effects against tacrine-induced cytotoxicity in Hep3B cells at $100{\mu}g/mL$. These results suggest that moringa leaf extracts have great potential as natural health products.
Keywords
moringa (Moringa oleifera Lam.); anti-inflammatory; anti-diabetic; alcohol dehydrogenase; hepatoprotective;
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