RESUMO
OBJECTIVE: To investigate the effects of chlorogenic acid (CGA) on hepatic stellate cell proliferation and the expression and secretion of Collagen I, Collagen III, tissue inhibitors of metalloproteinase-1 (TIMP-1) and matrix metalloproteinase-2 (MMP-2). METHODS: An immortalized rat hepatic stellate cell (HSC) line was cultured in vitro. The cells were divided into 5 groups: control group; platelet-derived growth factor (PDGF) (10 ng/mL), PDGF+CGA (12.5 µg/mL), PDGF+CGA (25 µg/mL), PDGF+CGA (50 µg/mL) and CGA (50 µg/mL) group. After 24 hours treatment, the proliferation of HSC was detected by MTT method. The mRNA expression of Collagen I, Collagen III, TIMP-1 and MMP-2 were detected by RT-PCR. The protein levels of Collagen I, Collagen III, TIMP-1 and MMP-2 in the culture supernatant of HSC were measured by ELISA. RESULTS: PDGF increased the hepatic stellate cell proliferation, the mRNA expression and the protein levels of Collagen I, Collagen III and TIMP-1. (P < 0.05), which were significantly decreased by CGA (P < 0. 05). However, CGA had no significant influence on the expression of MMP-2. CONCLUSION: The antifibrotic effect of CGA may be related with the inhibition of hepatic stellate cell proliferation and generation of extracelluar matrix and promotion of extracelluar matrix degradation.
