摘要
目的研究重组人骨形态发生蛋白(rhBMP)2和rhBMP13对软骨细胞蛋白多糖基因表达的调控作用。方法采用1,9二甲基亚甲蓝比色法检测高(625ng/m1)、中(125ng/m1)和低(25ng/m1)浓度组的rhBMP2和rhBMP13对软骨细胞硫化糖胺聚糖生成的影响;采用反转录聚合酶链反应测定3种不同浓度组的rhBMP2和rhBMP13对软骨细胞聚集蛋白聚糖mRNA表达的影响;用HoechstDye法检测不同浓度组的rhBMP2和rhBMP13对软骨细胞的增殖作用。结果与对照相比,不同浓度的rhBMP2和rhBMP13促进软骨聚集蛋白聚糖mRNA的表达差异均有统计学意义(P〈0.05);在DNA的检测中,与对照相比,不同浓度组的rhBMP2和rhBMP13促进软骨细胞增殖差异均无统计学意义。结论rhBMP2和rhBMP13均能增加软骨细胞聚集蛋白聚糖的表达,rhBMP2比rhBMP13对软骨细胞基因表达有更大的正向调控作用。但rhBMP2和rhBMP13对软骨细胞增殖差异无统计学意义。
Objective By exploring the effects of recombinant human bone morphogenetic protein (rhBMP) 2 and rhBMP13 on chondrocytes proteoglycan production and phenotype expression to establish the theoritical mechanisms for the treatment of disc degeneration with chondrocytes transplantation plus BMPs. Methods The dose-dependent effects of rhBMP2 and rhBMP13 on PG protein synthesis and gene expression were detected under different concentrations (0, 25, 125, and 625 ng/ml). The suffated-glycosaminoglycan (s-GAG) in the culture media and the pericellular matrix was measured with a 1,9-dimethyl-methylene blue (DMMB) colorimetric assay. Reverse transcriptase polymerase chain reaction (RT-PCR) was performed respectively to quantify the relative abundance of aggrecan mRNA. Cell proliferation was examined by Hoechst Dye assay. Results All rhBMP2 and rhBMP13 in different concentrations could significantly increase s-GAG synthesis and gene expression in chondrocytes (P〈0.05). And at the same concentration, rhBMP2 was more potent than rhBMP13 on s-GAG synthesis. Hoechst Dye assay showed neither rhBMP2 nor rhBMPI3 had significant effect on cell proliferation. Conclusion rhBMP2 and rhBMP13 are able to upregulate s-GAG syn- thesis, in addition, rhBMP2 is more potent than rhBMP13 on aggrecan gene expression regulation, but rhBMP2 and rhBMP13 do not have significant effect on chondrocyte proliferation.
出处
《中华风湿病学杂志》
CAS
CSCD
北大核心
2009年第2期76-78,共3页
Chinese Journal of Rheumatology
基金
国家自然科学基金(30400163)