title: Dicliptera Chinensis polysaccharides target TGF-β/Smad pathway and inhibit stellate cells activation in rats with dimethylnitrosamine-induced hepatic fibrosis.
abstract: This study aims to study impact of Dicliptera chinensis polysaccharide (DCP) on hepatic fibrosis (HF) and activation of hepatic stellate cells (HSCs). Liver fibrosis model was induced by intraperitoneal injection of dimethyl nitrosamines (DMN) in rat. Rats in treatment group were administrated with different concentrations of DCP (0, 100, 300 mg/kg) by intraperitoneal injection. Hematoxylin and eosin (H&E) and Masson's trichrome staining were used to assess histo-pathological change. α-SMA, TGF-β1 and pSmad 2/3 were assayed by immuno-histochemistry. HSC-T6 cells were stimulated by recombined rat TGF-β1 (1 ng/mL) to simulate an activating model in vitro and then interfered with DCP (concentration of 0, 25, 50, 100, 200, 400 µg/ml). MTT assay was used to determine cell proliferation and western blotting was used to detect α-SMA and pSmad 2/3 expression. Results demonstrated that DCP alleviated DMN-induced liver fibrosis in rat and significantly down-regulated TGF-β1 expression, pSmad2/3 and α-SMA in liver tissue in a dose-dependent way. DCP inhibited proliferation and activation of TGF-β1-stimulated HSC-T6 in vitro and significantly down-regulated α-SMA and pSmad2/3 expression. In conclusion, this study revealed that DCP attenuates progression of liver fibrosis through suppressing TGF-β/Smad pathway. DCP is a potential botanical polysaccharide to management liver fibrosis.
authors.affiliation: Affiliated Hospital of Guilin Medical University GuangXi Key Laboratory of Molecular Medicine in Liver Injury and Repair Guilin China.
authors.forename: X
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Zhuhai people's Hospital Department of Pathology Zhuhai China.
authors.forename: J
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Guilin Medical University Department of Pathology, the Second affiliated Hospital Guilin China.
authors.forename: L
authors.initials: L
authors.lastname: Jia
authors.affiliation: Affiliated Hospital of Guilin Medical University GuangXi Key Laboratory of Molecular Medicine in Liver Injury and Repair Guilin China shengjunxiao@sina.com.
authors.forename: S
authors.initials: S
authors.lastname: Xiao
mesh_terms: D027901:Acanthaceae / Q000737:chemistry*; D000199:Actins / Q000378:metabolism; D000818:Animals; D002460:Cell Line; D049109:Cell Proliferation / Q000187:drug effects; D004128:Dimethylnitrosamine / Q000494:pharmacology; D015536:Down-Regulation / Q000187:drug effects; D055166:Hepatic Stellate Cells / Q000378:metabolism / Q000528:radiation effects*; D006801:Humans; D008099:Liver / Q000187:drug effects / Q000378:metabolism; D008103:Liver Cirrhosis / Q000139:chemically induced / Q000188:drug therapy* / Q000378:metabolism; D008297:Male; D010936:Plant Extracts / Q000494:pharmacology; D010946:Plants, Medicinal / Q000737:chemistry; D011134:Polysaccharides / Q000494:pharmacology*; D051381:Rats; D017208:Rats, Wistar; D015398:Signal Transduction / Q000187:drug effects*; D051785:Smad Proteins / Q000378:metabolism*; D016212:Transforming Growth Factor beta / Q000378:metabolism*
chemical_list: D000199:Actins; D010936:Plant Extracts; D011134:Polysaccharides; D051785:Smad Proteins; D016212:Transforming Growth Factor beta; D004128:Dimethylnitrosamine