Abstract
Objective To observe expression and location of cannabinoid receptor 1 (CB1) in liver tissue of patients with chronic hepatitis B (CHB) ,and analyze the relationship of it with the liver fibrosis score,the serum levels of TGF-β1 and Leptin. Methods Liver biopsies were performed in 118 patients with CHB.The expression of CB1 in liver tissue was observed by immune histochemical staining, and semi-quantitative analysis was carried out to devide the CB1 score into four grades: -, +, + +, + + +. Serum levels of TGF-β1 and Leptin were determined by ABC-ELISA double-antibody sandwich method. Results The expression of CB1 in liver tissue with CHB had significant relationship with the fibrosis score. As the expression of the CB1 increased, the fibrosis score became higher ( F = 23. 369,P = 0. 000). Moreover, the expression of CB1 in liver tissue with CHB had significant relationship with the serum levels of TGF-β1 and Leptin( F values were 8. 762 and 5. 749;P values were 0. 001 and 0. 027, respectively). Conclusion CB1 may play promotive role in the process of hepatic fibrosis through regulation of TGF-β1 and Leptin. Key words: Chronic hepatitis B; Cannabinoid receptor 1; Liver fibrosis; Transforming growth factor-β1; Leptin
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