Evidence has accumulated to suggest an important role of ethanol and/or its metabolites in the pathogenesis of alcohol-related liver disease. In this review, the fibrogenic effects of ethanol and its metabolites on he...Evidence has accumulated to suggest an important role of ethanol and/or its metabolites in the pathogenesis of alcohol-related liver disease. In this review, the fibrogenic effects of ethanol and its metabolites on hepatic stellate cells (HSCs) are discussed. In brief, ethanol interferes with retinoid metabolism and its signaling, induces the release of fibrogenic cytokines such as transforming growth factor β-1 (TGFβ-1) from HSCs, up-regulates the gene expression of collagen I and enhances type I collagen protein production by HSCs. Ethanol further perpetuates an activated HSC phenotype through extracellular matrix remodeling. The underlying pathophysiologic mechanisms by which ethanol exerts these pro-fibrogenic effects on HSCs are reviewed.展开更多
目的:探讨鳖甲煎丸不同提取物对转化生长因子-β1(TGF-β1)诱导的HSC-T6细胞增殖及相关细胞因子的影响作用,并探究水提物与醇提物抗肝纤维化作用的异同。方法:建立TGF-β1诱导HSC-T6细胞增殖模型,采用MTT法观察水提物与醇提物对HSC-T6...目的:探讨鳖甲煎丸不同提取物对转化生长因子-β1(TGF-β1)诱导的HSC-T6细胞增殖及相关细胞因子的影响作用,并探究水提物与醇提物抗肝纤维化作用的异同。方法:建立TGF-β1诱导HSC-T6细胞增殖模型,采用MTT法观察水提物与醇提物对HSC-T6细胞增殖的量效和时效关系来探讨鳖甲煎丸提取物对TGF-β1诱导HSC-T6细胞增殖的影响;并采用RT-PCR、ELISA法测定不同提取物对HSC-T6细胞相关细胞因子的影响。结果:鳖甲煎丸水提物在0.125-2.000mg/m L浓度范围,抑制效果随剂量增加而降低,呈线性负相关关系,醇提物未见明显的剂量依赖关系。水提物抑制作用随时间延长表现为先增强后减弱,醇提物则表现出一定的时间依赖性,随时间延长而增强。与空白对照组比较,模型组细胞相关细胞因子α-SMA、Col-Ⅲ、CTGF和PDGF m RNA含量增高(P<0.05)。与模型组比较,鳖甲煎丸水提物使HSC-T6细胞COL-Ⅲ、COL-Ⅳ、PDGF m RNA含量和蛋白表达降低。醇提物使HSC-T6细胞COL-Ⅲ、COL-Ⅳm RNA含量和蛋白表达降低,而PDGF m RNA含量升高促进其蛋白表达。结论:鳖甲煎丸水提物与醇提物对TGF-β1诱导的HSC-T6细胞增殖均有一定的抑制作用,但其抑制作用表现有一定差异;同时均可抑制胶原COL-Ⅲ、COL-Ⅳ的合成;对PDGF表达调控亦有所不同。展开更多
文摘Evidence has accumulated to suggest an important role of ethanol and/or its metabolites in the pathogenesis of alcohol-related liver disease. In this review, the fibrogenic effects of ethanol and its metabolites on hepatic stellate cells (HSCs) are discussed. In brief, ethanol interferes with retinoid metabolism and its signaling, induces the release of fibrogenic cytokines such as transforming growth factor β-1 (TGFβ-1) from HSCs, up-regulates the gene expression of collagen I and enhances type I collagen protein production by HSCs. Ethanol further perpetuates an activated HSC phenotype through extracellular matrix remodeling. The underlying pathophysiologic mechanisms by which ethanol exerts these pro-fibrogenic effects on HSCs are reviewed.
文摘目的:探讨鳖甲煎丸不同提取物对转化生长因子-β1(TGF-β1)诱导的HSC-T6细胞增殖及相关细胞因子的影响作用,并探究水提物与醇提物抗肝纤维化作用的异同。方法:建立TGF-β1诱导HSC-T6细胞增殖模型,采用MTT法观察水提物与醇提物对HSC-T6细胞增殖的量效和时效关系来探讨鳖甲煎丸提取物对TGF-β1诱导HSC-T6细胞增殖的影响;并采用RT-PCR、ELISA法测定不同提取物对HSC-T6细胞相关细胞因子的影响。结果:鳖甲煎丸水提物在0.125-2.000mg/m L浓度范围,抑制效果随剂量增加而降低,呈线性负相关关系,醇提物未见明显的剂量依赖关系。水提物抑制作用随时间延长表现为先增强后减弱,醇提物则表现出一定的时间依赖性,随时间延长而增强。与空白对照组比较,模型组细胞相关细胞因子α-SMA、Col-Ⅲ、CTGF和PDGF m RNA含量增高(P<0.05)。与模型组比较,鳖甲煎丸水提物使HSC-T6细胞COL-Ⅲ、COL-Ⅳ、PDGF m RNA含量和蛋白表达降低。醇提物使HSC-T6细胞COL-Ⅲ、COL-Ⅳm RNA含量和蛋白表达降低,而PDGF m RNA含量升高促进其蛋白表达。结论:鳖甲煎丸水提物与醇提物对TGF-β1诱导的HSC-T6细胞增殖均有一定的抑制作用,但其抑制作用表现有一定差异;同时均可抑制胶原COL-Ⅲ、COL-Ⅳ的合成;对PDGF表达调控亦有所不同。