淸肝解酒湯이 TGF-β1 유도성 간섬유화에 미치는 영향
The Effect of Chungganhaeju-tang on TGF-β1-induced Hepatic Fibrosis
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Abstract
Objectives: The aim of this study is to characterize the effect of Chungganhaeju-tang on TGF-β1-induced hepatic fibrosis. Materials and Methods: mRNA and protein expression levels of TGF-β1 in Chungganhaeju-tang treated HepG2 cells were compared to untreated cells using quantitative RT-PCR and ELISA assay, respectively. mRNA expression levels of the TGF-β1 signaling pathway genes (TβR-1, TβR-II, Smad2, Smad3, Smad4, and PAI-1) and fibrosis-associated genes (CTGF, fibronectin, and collagen type 1α) were evaluated by quantitative RT-PCR. The effect of Chungganhaeju-tang on cell proliferation of T3891 human fibroblast was evaluated using [3H]Thymidine Incorporation Assay. Results: Inhibition of TGF-β1 mRNA expression and protein production was observed with treatment of Chungganhaeju-tang and seen to be dose and time dependent. Whereas TGF-β1-mediated induction of PAI-1 was suppressed with treatment of Chungganhaeju-tang, expression of the TGF-β1 signaling pathway genes such as TβR-1, TβR-II, Smad2, Smad3, and Smad4 was not affected. With treatment of Chungganhaeju-tang, inhibition of TGF-β1-induced cell proliferation of T3891 human fibroblast was observed, as well as abrogation of TGF-β1-mediated transcriptional up-regulation of CTGF, fibronectin, and collagen type Iα. Conclusion: This study strongly suggests that the liver cirrhosis-suppressive activity of Chungganhaeju-tang may be derived at least in part from its inhibitory effect on TGF-β1 functions, such as blockade of TGF-β1 stimulation of fibroblast cell proliferation and fibrosis-related gene expression as well as expression of TGF-β1 itself.
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