HSP90α overexpression in small intestinal mucosa and high blood serum levels of HSP70 and 8-isoprostane in carrageenan-induced intestinal inflammation

Abstract

Aims. The aim of our research was to evaluate HSP90α expression in small intestinal tissue, levels of HSP70 and 8-isoprostane in blood serum of rats with chronic carrageenan-induced enteritis. Methods. We determined immunohistochemically HSP90α expression in small intestine of ten rats with intestinal inflammation caused by the four-month-long oral administration of k-carrageenan-containing 1% processed Eucheuma seaweed solution and compared it with the small intestinal HSP90α expression in ten healthy animals. Levels of 8-isoprostane and HSP70 were determined in blood serum of animals from both groups using commercially available ELISA kits. Results. HSP90α overexpression was observed in small intestine of rats with carrageenan-induced enteritis. The disease was also associated with the elevated circulating levels of 8-isoprostane, indicating the development of oxidative stress. The level of HSP70 in blood serum was also found to be higher in animals with carrageenan-induced intestinal inflammation compared with control rats. Conclusion. Our findings suggest that HSP90α and HSP70 play an important role in the pathogenesis of chronic carrageenan-induced enteritis.