Chitooligosaccharide guanidine inhibits high glucose-induced activation of DAG/PKC pathway by regulating expression of GLUT2 in type 2 diabetic nephropathy rats

Autor: Hai Zhang, Shengsheng Zhang, Li Wang, Xiaofei Liu, Yuntang Wu
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Zdroj: Journal of Functional Foods, Vol 41, Iss , Pp 41-47 (2018)
Druh dokumentu: article
ISSN: 1756-4646
DOI: 10.1016/j.jff.2017.12.032
Popis: Previous results from our laboratory showed that chitosan biguanidine hydrochloride (CSGH) and chitooligosaccharide guanidine (COSG) could control glucose uptake by regulating the expression of glucose transporters (GLUTs) in vitro experiments. In this study, we try to delineate changes observed in activation of diacylglycerol (DAG)/protein kinase C-β(PKC-β) pathway and GLUT2 in kidney. STZ-induced diabetic rats were administered COSG via daily intra-gastric gavage for 8 weeks. Obviously, COSG significantly attenuated fasting blood glucose and blood glucose level by modulating the over-expression of GLUT2 and the level of DAG as well. Immunohistological examination revealed that factors such as PKC-β and transforming growth factor-β (TGF-β) diminished to various extents after treatment with COSG, which impinged on the synthesis of extracellular matrix (ECM) components like fibronectin (FN). As a result, high glucose-induced activation of DAG/PKC pathway is inhibited, which is associated with the concentration of glucose controlled by the expression of GLUT2 with the treatment of COSG.
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