Enrichment and Purification of Polyphenol Extract from Sphallerocarpus gracilis Stems and Leaves and in Vitro Evaluation of DNA Damage-Protective Activity and Inhibitory Effects of α-Amylase and α-Glucosidase.
An efficient preparative separation method for Sphallerocarpus gracilis stems and leaves polyphenols (SGslP) was established in this study. An X-5 macroporous adsorption resin was selected for the purification of the SGslP, and the polyphenol content of the purified SGslP (PSGslP) was increased 5.11-fold from 8.29% to 42.38% after one treatment run. The chemical composition of the PSGslP was analyzed by HPLC-MS/MS, and the predominant compounds were found to be luteolin-7-glucoside, acacetin-7-acetyglycoside and its isomers. In addition, the PSGslP was evaluated in vitro to determine the DNA damage-protective activity and inhibitory effects of α-amylase and α-glucosidase. The results indicated that the PSGslP exhibited significant protective activities against both ROO• and •OH radical-induced DNA damage. Moreover, the PSGslP exerted a dose-dependent inhibition effect on α-glucosidase but no inhibitory effect on α-amylase. These findings indicate that the Sphallerocarpus gracilis stems and leaves are good natural sources of antioxidants and are potent inhibitors of α-glucosidase activity and are potential anti-diabetic inhibitor.
['Ma|Tingting|T|', 'Sun|Xiangyu|X|', 'Tian|Chengrui|C|', 'Luo|Jiyang|J|', 'Zheng|Cuiping|C|', 'Zhan|Jicheng|J|']
D019661:Apiaceae D004249:DNA Damage D065089:Glycoside Hydrolase Inhibitors D007004:Hypoglycemic Agents D066298:In Vitro Techniques D010936:Plant Extracts D018515:Plant Leaves D018547:Plant Stems D059808:Polyphenols D000516:alpha-Amylases D000520:alpha-Glucosidases
purification SGslP enzyme inhibition oxidative DNA damage phenolic composition