松弛素对高糖环境心脏成纤维细胞胶原基因表达的影响

目的探讨人重组松弛素（rhRLX）对高糖环境大鼠心脏成纤维细胞胶原基因表达的影响。方法原代培养Sprague-Dawley大鼠心脏成纤维细胞。用RT-PCR方法分别观察在正常糖（NG,5.6mmol/L）和高糖（HG,25mmol/L）环境下二代成纤维细胞胶原基因和松弛素基因的表达;rhRLX（100μg/L）分别与NG,HG共同作用72h后成纤维细胞胶原基因的表达。结果HG促进Ⅰ型前胶原mRNA和Ⅲ型前胶原mRNA的表达,rhRLX可以抑制上述作用。HG组松弛素基因的表达比较明显。结论rhRLX对HG促进的Ⅰ型和Ⅲ型胶原基因的表达具有抑制作用。

Effects of relaxin on collagen gene expression in cardiac fibroblasts under high glucose conditions

Objective To determine the influence of recombinant human relaxin （rhRLX） on collagen gene expression in cardiac fibroblasts （CFs） under high glucose （HG） conditions. Methods CFs were isolated from Sprague-Dawley rats and cultured primarily. The mRNA levels of type Ⅰ,type Ⅲ collagen and RLX in CFs after 3 passages under normal glucose （NG,5.6 mmol/L） and high glucose （HG,25 mmol/L） conditions were assessed by RT-PCR. rhRLX （100 μg/L） was cocultured with CFs under NG and HG conditions for 72 h respectively,then the mRNA levels of type Ⅰand type Ⅲ collagen were detected. Results HG increased the expression of type Ⅰ and type Ⅲ collagen,which was inhibited by rhRLX. The RLX mRNA expression was stronger in HG group than in NG group. Conclusion rhRLX inhibits the HG-enhanced overexpression of typeⅠand type Ⅲ collagen.