Objective To determine the activation of the farnesoid X receptor(FXR) on the expression of fibroblast growth factor 21(FGF21) in C57BL/6 mice.Methods A total of 18 male C57BL/6 mice(3 to 4 weeks old) were randomly divided into 3 groups and treated with FXR agonist,chenodesoxycholic acid(CDCA) at different doses of 0,10,and 50 mg/kg respectively for a week.After the treatment,the mice was sacrificed for their liver tissue.RT-PCR and Western blotting were performed to test the expression of FGF21 at mRNA and...