Leptin administration exacerbates thioacetamide-induced liver fibrosis in mice  

作　　者：Kai Dai Jun-Ying Qi De-Ying Tian 

机构地区：[1]Department of Infectious Diseases, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, China

出　　处：《World Journal of Gastroenterology》2005年第31期4822-4826,共5页世界胃肠病学杂志（英文版）

摘　　要：AIM： To investigate the effects of leptin administration on liver fibrosis induced by thioacetamide （TAA）. METHODS： Twenty-four male C57BI/6 mice were randomly allocated into four groups, which were intra-peritoneally given saline （2 mL/kg）, leptin （1 mg/kg）, TAA （200 mg/kg）, TAA （200 mg/kg） plus leptin （1 mg/kg） respectively, thrice a week. All mice were killed after 4 wk. The changes in biochemical markers, such as the levels of alanine aminotransferase （ALT） and aspartate aminotransferase （AST） in serum and superoxide dismutase （SOD）, malondialdehyde （MDA） in liver were determined. For histological analysis, liver tissues were fixed with 10% buffered formalin, embedded with paraffin. Hematoxylin-eosin （HE） staining and picric acid-Sirius red dyeing were performed. The level of α1（I） procollagen mRNA in liver tissues was analyzed by RT-PCR. RESULTS： Apparent liver fibrosis was found in TAA group and TAA plus leptin group. Compared to saline group, the levels of ALT and AST in serum and MDA in liver increased in TAA group （205.67±27.69 U/L vs 50.67±10.46 U/L, 177.50±23.65 U/L vs76.33±12.27 U/L, 2.60±0.18 nmol/mg pro vs 1.91±0.14 nmol/mg pro, P〈0.01） and in TAA plus leptin group （256.17±22.50 U/L vs 50.67±10.46 U/L, 234.17±27.37 U/L vs76.33±12.27 U/L, 2.97±0.19 nmol/mg pro vs 1.91±0.14 nmol/mg pro, P〈0.01）. The level of SOD in livers decreased （51.80±8.36 U/mg pro vs 81.52±11.40 U/mg pro, 35.78±6.11 U/mg pro vs81.52± 11.40 U/mg pro, P〈0.01） and the level of α1（I） procollagen mRNA in liver tissues also increased （0.28±0.04 vs0.11± 0.02, 0.54±0.07 vs0.11±0.02, P〈0.01）. But no significant changes were found in leptin group and saline group. Compared to TAA group, ALT, AST, MDA, and α1（I） procollagen mRNA and grade of liver fibrosis in TAA plus leptin group increased （256.17±22.50 U/L vs 205.67± 27.69 U/L, P〈0.05; 234.17±27.37 U/L vs 177.50±23.65 U/L, P〈0.05; 2.97±0.19 nmol/mg pro vs 2.60±0.18 nmolAIM: To investigate the effects of leptin administration on liver fibrosis induced by thioacetamide (TAA).METHODS: Twenty-four male C57BI/6 mice were randomly allocated into four groups, which were intra-peritoneally given saline (2 mL/kg), leptin (1 mg/kg), TAA (200 mg/kg),TAA (200 mg/kg) plus leptin (1 mg/kg) respectively, thrice a week. All mice were killed after 4 wk. The changes in biochemical markers, such as the levels of alanine aminotransferase (ALT) and aspartate aminotransferase (AST)in serum and superoxide dismutase (SOD), malondialdehyde (MDA) in liver were determined. For histological analysis,liver tissues were fixed with 10% buffered formalin,embedded with paraffin. Hematoxylin-eosin (HE) staining and picric acid-Sirius red dyeing were performed. The level of α1(Ⅰ) procollagen mRNA in liver tissues was analyzed by RT-PCR.RESULTS: Apparent liver fibrosis was found in TAA group and TAA plus leptin group. Compared to saline group, the levels of ALT and AST in serum and MDA in liver increased in TAA group (205.67±27.69 U/L vs 50.67±10.46 U/L,177.50±23.65 U/L vs76.33±12.27 U/L, 2.60±0.18 nmol/mg pro vs 1.91±0.14 nmol/mg pro, P＜0.01) and in TAA plus leptin group (256.17±22.50 U/L vs 50.67±10.46 U/L,234.17±27.37 U/L vs76.33±12.27 U/L, 2.97±0.19 nmol/mg pro vs1.91±0.14 nmol/mg pro, P＜0.01). The level of SOD in livers decreased (51.80±8.36 U/mg pro vs 81.52±11.40 U/mg pro, 35.78±6.11 U/mg pro vs81.52±11.40 U/mg pro, P＜0.01) and the level of α1(Ⅰ) procollagen mRNA in liver tissues also increased (0.28±0.04 vs0.11±0.02, 0.54±0.07 vs0.11±0.02, P＜0.01). But no significant changes were found in leptin group and saline group.Compared to TAA group, ALT, AST, MDA, and α1(Ⅰ)procollagen mRNA and grade of liver fibrosis in TAA plus leptin group increased (256.17±22.50 U/L vs 205.67±27.69 U/L, P＜0.05; 234.17±27.37 U/L vs 177.50±23.65 U/L,P＜0.05; 2.97±0.19 nmol/mg pro vs2.60±0.18 nmol/mg pro, P＜0.05; 0.54±0.07 vs0.28±0.04, P＜0.01; 3.17 vs 2.00, P＜0.05), and the lev

关 键 词：Liver fibrosis LEPTIN α1（I） procollagen 

分 类 号：R575.2[医药卫生—消化系统]