并行传输
消化(炼金术)
化学
碳酸钙-2
生物化学
胃肠道
吸收(声学)
氨肽酶
肽
二肽基肽酶
小肠
发酵
细胞
酶
色谱法
氨基酸
亮氨酸
物理
膜
声学
磁导率
作者
Songfeng Yu,Wenjun Wang,Tingting Bu,Runan Zhao,Ruihao Niu,Ling Liu,Yingbo Zhang,Jianping Wu,Donghong Liu
标识
DOI:10.1016/j.foodres.2022.112340
摘要
Two novel hypoglycemic peptides VY and SFLLR were identified from douchi as the major peptides responsible for the glucose uptake activity. The present work aimed to elucidate their digestion, absorption and transport properties using simulated digestion and Caco-2 cell monolayers transport models. Besides, the effects of digestion and absorption on the structure and activity were also studied. The results showed that VY was resistant to gastrointestinal tract digestion and could cross Caco-2 cell monolayers intactly via both TJs-mediated passive paracellular pathway and PepT1-mediated active route. In comparison, SFLLR was partially degraded into small fragments of SFLL, SFL, and SF by the digestive system, leading to increased glucose uptake activity. Notably, SFLLR, SFLL, and SFL were partly hydrolyzed by aminopeptidase N or dipeptidyl peptidase IV during transport, but they were transported intact. SFL was transported via both paracellular diffusion and PepT1-mediated routes, while SFLLR and SFLL were via paracellular route only.
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