Ganoderma atrum Polysaccharide Ameliorates Hyperglycemia-Induced Endothelial Cell Death via a Mitochondria-ROS Pathway

Journal of Agricultural and Food Chemistry
Wen-Juan LiMingyong Xie

Abstract

The aim of the present study was to examine the role of Ganoderma atrum polysaccharide (PSG-1) in reactive oxygen species (ROS) generation and mitochondrial function in hyperglycemia-induced angiopathy. In this work, ROS scavenger, oxidizing agent tert-butylhydroperoxide (tBH), mitochondrial permeability transition pore (mPTP) blockers, and caspase inhibition are used to investigate whether PSG-1 may promote survival of human umbilical vein cells (HUVECs) through preventing the overproduction of ROS and mitochondrial dysfunction. Experimental results show that exposure of HUVECs to 35.5 mmol/L glucose increases the proportion of cells undergoing apoptosis. PSG-1, mPTP blocker, or caspase inhibition can reduce apoptosis and ROS generation. PSG-1 also increases mitochondrial Bcl-2 protein formation and mitochondrial membrane potential (ΔΨm) but inhibits Bax translocation, cytochrome c release, and caspase activation. In summary, vascular protection of PSG-1 can be mediated by a mitochondria-ROS pathway. ROS generation and mPTP induction are critical for high glucose-mediated apoptosis. PSG-1 ameliorates endothelial dysfunction by inhibiting oxidative stress and subsequent mitochondrial dysfunction.

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Citations

May 14, 2016·Journal of Agricultural and Food Chemistry·Chia-Chieh WuPin-Ju Chueh
Dec 10, 2016·Journal of Agricultural and Food Chemistry·Wen-Juan LiMing-Yong Xie
Jan 19, 2018·Aging and Disease·Jue WangJuan Feng
Mar 8, 2018·American Journal of Physiology. Cell Physiology·Minglin PanAyako Makino
Jul 4, 2018·Luminescence : the Journal of Biological and Chemical Luminescence·Xinda LiuJianzhong Lu

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