1. Purification and identification of buckwheat hull flavonoids and its comparative evaluation on antioxidant and cytoprotective activity in vitro
- Author
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Cui Yang, Dailin Liu, Chunhong Piao, Zhao Ziying, Liu Junmei, and Liu Ziqi
- Subjects
Antioxidant ,cytoprotective activity ,buckwheat hulls ,antioxidant activity ,flavonoid components ,purification and identification ,Isoorientin ,medicine.medical_treatment ,Flavonoid ,Vitexin ,Hyperoside ,03 medical and health sciences ,Rutin ,chemistry.chemical_compound ,0404 agricultural biotechnology ,medicine ,TX341-641 ,heterocyclic compounds ,Food science ,Original Research ,030304 developmental biology ,chemistry.chemical_classification ,0303 health sciences ,Reactive oxygen species ,biology ,Nutrition. Foods and food supply ,Chemistry ,fungi ,food and beverages ,04 agricultural and veterinary sciences ,040401 food science ,carbohydrates (lipids) ,Catalase ,biology.protein ,Food Science - Abstract
Buckwheat hulls, by‐products of buckwheat processing, contain various flavonoids, but the antioxidant capacity and synergy of different flavonoids are unclear. The purpose of this study was to evaluate the antioxidant activity of flavonoid monomers and high‐flavonoid component (HBHF) in buckwheat hulls using chemical‐based assays and cellular‐based assays. Four kinds of flavonoids were identified as rutin, isoorientin, vitexin, and hyperoside from buckwheat hulls. In chemical‐based assays, rutin and HBHF showed relatively high free radical scavenging activities and total antioxidant capacities. In cellular‐based assays, however, HBHF showed much higher proliferation activity against cell damage than flavonoid monomers when HepG2 cell was oxidatively damaged by H2O2 or high glucose. The cytoprotective activities of flavonoid monomers and HBHF were closely associated with reducing levels of reactive oxygen species (ROS) and malondialdehyde (MDA) or increasing catalase (CAT) activity. In conclusion, buckwheat hull flavonoids are the favorable application candidates for natural antioxidants., This work was aimed at the evaluation of antioxidant and cell protective activities of buckwheat hull flavonoids and providing a favorable evidence for the therapeutic utilization of natural extract.
- Published
- 2020