Abstract
To observe the hypoglycemic effect of Qizhi Jiangtang capsule in rats with type 2 diabetes, and investigate the preliminary mechanism of its hypoglycemic effect, type 2 diabetes rat models were established by high glucose and high fat combined with small dose of streptozotocin (STZ). After continuous administration for 6 weeks, blood glucose, and glycosylated serum protein (GSP) levels were detected in all of the animals; immunohistochemistry assay was used to detect the number of islet β cells; Western blot assay was used to detect the protein expression levels of insulin receptor (InsR), phosphoinositide-3 kinases (PI3K), glucose transporter-2 (GLUT2) and phosphorylated Jun N-terminal kinases (p-JNK)in hepatic tissues. The results showed that Qizhi Jiangtang capsule could reduce the blood sugar and GSP levels in serum in animals with type 2 diabetes mellitus, increase the level of insulin in serum and number of islet β cells, increase the protein expression levels of InsR, PI3K and GLUT2, and reduce the level of p-JNK protein expression. In conclusion, Qizhi Jiangtang capsule has relatively stable hypoglycemic effect, and the mechanism may be associated with increasing the number of islet β cells and level of insulin in serum, up-regulating the protein expression levels of InsR, PI3K and GLUT2, down-regulating the level of p-JNK protein expression in hepatic tissues, and reducing the level of insulin in hepatic tissues.
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