RESUMO
Cholesterol is a component of cell membrane and plays a vital role in maintaining metabolism and normal functions in human body. Liver X receptor (LXR) is a nuclear receptor expressed in abundance in the liver. It influences the process of cholesterol metabolism through regulating the synthesis, transformation, and transportation of cholesterol and bile acid at the level of hepatocytes, and therefore, it plays an important role in maintaining cholesterol homeostasis in human body. In addition, LXR can inhibit the intestinal absorption of dietary cholesterol, reduce exogenous cholesterol level and total cholesterol level in human body, and prevent hypercholesterolemia and formation of gallstones. This article summarizes the mechanism of action of LXR in regulating cholesterol metabolism at both liver and intestinal levels.
RESUMO
Objective To investigate the influence of glycine supplement on partial biochemical indicator in exhaustive exer‐cise mice .Methods Divided Kunming′s male‐mice into 3 group(10/group):exhaustive swimming group(E) ,exhaustive swimming group with glycine supplement(G) and silent control group (S) .Mice in the G group was treated with 4‐weeked intragastric admin‐istration of glycine ,while mice in other 2 groups received physiological saline .After 4 weeks ,mice in E and G group did the exhaus‐tive swimming exercise .After sampling ,the activity of complement hemolytic activity was measured ,and the serum levels of some biochemical indexes were determined .Results Time of exhaustive swimming in G group was significantly longer than E group(P0 .05) .Conclusion Exhaustive swimming mice can have part indicator abnormali‐ty ,but Glycine supplement can effectively improve that condition and enhance the exercise ability to some extent .