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Embryonic liver fodrin involved in hepatic stellate cell activation and formation of regenerative nodule in liver cirrhosis

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单位: [1]Huazhong Univ Sci & Technol, Tongji Med Coll, Union Hosp, Dept Gastroenterol, Wuhan 430022, Peoples R China [2]Huazhong Univ Sci & Technol,Tongji Med Coll,Tongji Hosp,Inst Liver Dis,Wuhan 430022,Peoples R China [3]Huazhong Univ Sci & Technol, Tongji Med Coll, Union Hosp, Inst Hematol, Wuhan 430022, Peoples R China
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关键词: b2-Spectrin hepatic stellate cell hepatic progenitor cell liver cirrhosis

摘要:
Transforming growth factor (TGF) beta 1 plays a critical role in liver fibrosis. Previous studies demonstrated embryonic liver fodrin (ELF), a beta-spectrin was involved in TGF-beta/Smad signalling pathway as Smad3/4 adaptor. Here we investigate the role of ELF in pathogenesis of liver cirrhosis. In carbon tetrachloride (CCl4)-induced mice model of liver cirrhosis, ELF is up-regulated in activated hepatic stellate cells (HSCs), and down-regulated in regenerative hepatocytes of cirrhotic nodules. In activated HSCs in vitro, reduction of ELF expression mediated by siRNA leads to the inhibition of HSC activation and procollagen I expression. BrdU assay demonstrates that down-regulation of ELF expression does not inhibit proliferation of activated HSCs in vitro. Immunostaining of cytokeratin 19 and Ki67 indicates that regenerative hepatocytes in cirrhotic liver are derived from hepatic progenitor cells (HPC). Further study reveals that HPC expansion occurs as an initial phase, before the reduction of ELF expression in regenerative hepatocytes. Regenerative hepatocytes in cirrhotic liver show the change in proliferative activity and expression pattern of proteins involved in G1/S transition, which suggests the deregulation of cell cycle in regenerative hepatocytes. Finally, we find that ELF participates in TGF-beta/Smad signal in activated HSCs and hepatocytes through regulating the localization of Smad3/4. These data reveal that ELF is involved in HSC activation and the formation of regenerative nodules derived from HPC in cirrhotic liver.

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出版当年[2011]版:
大类 | 2 区 医学
小类 | 2 区 医学:研究与实验 3 区 细胞生物学
最新[2025]版:
大类 | 3 区 医学
小类 | 3 区 细胞生物学 3 区 医学:研究与实验
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出版当年[2010]版:
Q1 MEDICINE, RESEARCH & EXPERIMENTAL Q2 CELL BIOLOGY
最新[2023]版:
Q2 CELL BIOLOGY Q2 MEDICINE, RESEARCH & EXPERIMENTAL

影响因子: 最新[2023版] 最新五年平均 出版当年[2010版] 出版当年五年平均 出版前一年[2009版] 出版后一年[2011版]

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第一作者单位: [1]Huazhong Univ Sci & Technol, Tongji Med Coll, Union Hosp, Dept Gastroenterol, Wuhan 430022, Peoples R China [2]Huazhong Univ Sci & Technol,Tongji Med Coll,Tongji Hosp,Inst Liver Dis,Wuhan 430022,Peoples R China
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