title: TNF-alpha and leptin in experimental liver fibrosis models induced by carbon tetrachloride and by common bile duct ligation.
abstract: In this study we investigated TNF-alpha and leptin levels in two different liver fibrosis models induced by carbon tetrachloride (CCl(4)) and common bile duct ligation (CBDL). A total of 36 male rats of Albino-Wistar strain were allocated to three groups. One of the groups was the control. The second group received 0.15 ml 100 g(-1) CCl(4) subcutaneously for 6 weeks, 3 days per week. The third group underwent common bile duct ligation (CBDL) and was monitored for 4 weeks. Histopathological investigation included fibrosis, steatosis and inflammation. Serum IL-6 and TNF-alpha levels were analysed by ELISA methods and leptin was analysed by RIA. Fibrosis and steatosis increased significantly in the CCl(4) group in comparison with the CBDL group (p < 0.01; p < 0.001). Leptin and TNF-alpha levels in CCl(4) group were higher than those in the CBDL and control groups (p < 0.05). TNF-alpha and leptin levels were not related to each another in either the CCl(4) group or the CBDL group (r=0.22, p > 0.05; r=0.19, p > 0.05). The IL-6 level was higher in the CCl(4) group in relation to severity of inflammation (p < 0.05). TNF-alpha and leptin levels were higher in animals with liver fibrosis induced by CCl(4), than they were in those whose liver fibrosis was induced by common bile duct ligation. Leptin and TNF-alpha may be less effective on the development of liver fibrosis in the group which underwent common bile duct ligation.
authors.affiliation: Department of Gastroenterology, Faculty of Medicine, Firat University, Elazig, Turkey. ihalilb@tnn.net
authors.forename: Ibrahim Halil
authors.initials: IH
authors.lastname: Bahçecioğlu
authors.forename: Mehmet
authors.initials: M
authors.lastname: Yalniz
authors.forename: Hüseyin
authors.initials: H
authors.lastname: Ataseven
authors.forename: Nurullah
authors.initials: N
authors.lastname: Bülbüller
authors.forename: Muzaffer
authors.initials: M
authors.lastname: Keçeci
authors.forename: Kutbeddin
authors.initials: K
authors.lastname: Demirdağ
authors.forename: Ibrahim
authors.initials: I
authors.lastname: Ozercan
authors.forename: Bilal
authors.initials: B
authors.lastname: Ustündağ
mesh_terms: D000818:Animals; D002251:Carbon Tetrachloride; D003135:Common Bile Duct / Q000601:surgery; D004195:Disease Models, Animal; D020738:Leptin / Q000097:blood*; D008026:Ligation; D008106:Liver Cirrhosis, Experimental / Q000097:blood / Q000139:chemically induced / Q000209:etiology*; D008297:Male; D051381:Rats; D014409:Tumor Necrosis Factor-alpha / Q000032:analysis*
chemical_list: D020738:Leptin; D014409:Tumor Necrosis Factor-alpha; D002251:Carbon Tetrachloride