Related Experiment Video
Updated: Mar 20, 2026

Screening and Isolation of C-Glycoside-Cleaving Intestinal Bacteria
Published on: February 28, 2025
From chemical characterization to functional validation: Screening of anti-hyperglycemic components and their action
Guangneng Li1,2, Jianyong Zhang1, Ying Gao1
1Tea Research Institute Chinese Academy of Agricultural Sciences, National Key Laboratory for Tea Plant Germplasm Innovation and Resource Utilization, National Engineering Research Center for Tea Processing, Hangzhou, China.
Abstract:
Single-source Jinxuan (Camellia sinensis) tea leaves were processed into teas with varying fermentation degrees to minimize genetic and environmental interference. Non-volatile component differences between fermented and non-fermented teas were identified, with fermented teas showing reduced tea polyphenols and soluble sugars but elevated theaflavins and theasinensin A(TSA). Fermented teas exhibited stronger in vitro digestive enzyme inhibition, particularly α-glucosidase (α-Glu), with TSA (R = 0.97) and theaflavin-3-gallate (R = 0.93) showing the strongest correlations (p < 0.001). In vivo, TSA's hypoglycemic effect in diabetic mice was mediated by enhanced insulin secretion, linked to lipid, amino acid, and fatty acid metabolism. These findings elucidate fermented tea's superior digestive enzyme inhibition and provide a foundation for optimizing hypoglycemic effects through processing.
Related Concept Videos
Oral Hypoglycemic Agents: α-Glucosidase Inhibitors
Acarbose and miglitol are...
Oral Hypoglycemic Agents: Biguanides and Glitazones
Dipeptidyl Peptidase 4 Inhibitors
