Betelnut polyphenols provide protection against high-altitude hypoxia in rats

Nan Fang Yi Ke Da Xue Xue Bao. 2021 May 20;41(5):671-678. doi: 10.12122/j.issn.1673-4254.2021.05.06.ABSTRACTOBJECTIVE: To investigate the protective effects of betelnut polyphenols on the vital organs against high-altitude hypoxia in rats.OBJECTIVE: We compared low-, medium-, and high- dose betelnut polyphenols (400, 800, and 1600 mg/kg, respectively) and rhodiola the effects of against high-altitude hypoxia in Wistar rats. The rats were kept in normal condition and given the drugs daily for 3 days before transfer to a facility at the altitude of 4010 m, where the rats were kept for 5 consecutive days for hypoxic exposure. The rats were then euthanized for measuring arterial blood gas and assessing liver, lung, brain and cardiac pathologies with HE staining. SOD activity, MDA content and GSH content in the organs were measured, and serum levels of inflammatory factors were detected using a protein microarray.OBJECTIVE: Acute exposure to hypoxia significantly reduced blood oxygen saturation of the rats (P < 0.05), caused damages in the liver, lung, brain and myocardium, lowered SOD activity and GSH content and increased MDA content in the vital organs, and increased serum levels of TIMP-1, MCP-1, ICAM-1, and L-selectin (P < 0.05). Treatment with betelnut polyphenols significantly improved blood oxygen saturation, alleviated organ damages, decreased MDA content and increased SOD activity and GSH content in the tissues, and significantly lowered serum levels of inflammator...
Source: Journal of Southern Medical University - Category: Universities & Medical Training Authors: Source Type: research