Abstract
The objective of this study is to investigate the anti-fibrotic effect of combined mesencymal stem cells (MSCs) and gene therapy on liver fibrosis. When transfected by the complex with a plasmid DNA of hepatocyte growth factor (HGF) and the spermine-introduced pullulan of gene carrier, MSCs secreted HGF protein over 1 week. The HGF secreted from transfected MSC had the biological activity to promote the albumin production of hepatocytes. After intravenous injection, the HGF-secreting MSCs (HGF-MSC) accumulated in the liver. The injection of HGF-MSC decreased the fibrosis area in a rat model of liver fibrosis to a significantly great extent compared with that of original MSC. In the in vitro experiment, the higher number of HGF-transfected MSCs was migrated by stromal cell-derived factor (SDF)-1α more strongly than the original MSC. Considering the promotion of SDF-1α secretion in the liver fibrosis, it is possible that, when transplanted, genetically-engineered MSCs are accumulated in the liver due to their higher response to SDF-1α. It is concluded that the intravenous injection of genetically-engineered MSCs is a promising therapy for liver fibrosis.
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