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Objective To determine over-expression of a truncated type ⅡTGF-β receptor in down-regulating TGF-β1 auto production in normal dermal fibroblasts. Methods In vitro cultured dermal fibroblasts were treated with rhTGF-β1 (5ng/ml) or recombinant adenovirus containing α truncated type Ⅱ TGF-β receptor gene (50 pfu/cell). Their effects on regulating gene expression of TGF-β1 were observed with Northern Blot. Results rh TGF-β1 up-regulated the gene expression of TGF-β1, (34 %-150%) and type Ⅰ pro-collagen( 13 %- 190%). Overexpression of a truncated receptor Ⅱ decreased the gene expression of TGF-β1 (53%-66%). Conclusion Over-expression of the truncated TGF-β receptor Ⅱdown-regulated TGF-β1 autoproduction via blocking signal transduction of TGF-β. This study may provide a new strategy for scar gene therapy.
Objective To determine over-expression of a truncated type II TGF-β receptor in down-regulating TGF-β1 auto production in normal dermal fibroblasts. Methods In vitro cultured dermal fibroblasts were treated with rhTGF-β1 (5 ng / ml) or recombinant adenovirus containing α Results of TGF-β1 up-regulated the gene expression of TGF-β1, (34% -150%) and type I pro-collagen (13% -190%). Overexpression of a truncated receptor II decreased the gene expression of TGF-β1 (53% -66% receptor Ⅱ down-regulated TGF-β1 autoproduction via blocking signal transduction of TGF-β. This study may provide a new strategy for scar gene therapy.