OGP 对低氧环境中小鼠BMSCs 成脂分化影响的研究
Effects of osteogenic growth peptide combined with hypoxia on the adipogenice differentiation ofmouse bone marrow mesenchymal stem cells
  
DOI:10.3969/j.issn.1006-7108.2022.05.009
中文关键词:  骨髓间充质干细胞  低氧  成骨生长肽  成脂分化
英文关键词:bone marrow mesenchymal stem cells  hypoxia  osteogenic growth peptide  adipogenesis
基金项目:国家自然科学基金(81760392)?云南省医学学科后 备人才项目(H ̄2017057)?云南省科技厅 ̄昆明医科大学联合专项 (2018FE001 ̄108)
作者单位
张磊1 龚跃昆2 尹勇1∗ 1. 云南大学附属医院康复医学科?云南昆明650000 2. 昆明医科大学第一附属医院骨科?云南昆明650000 
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中文摘要:
      目的 检测成骨生长肽(osteogenic growth peptide?OGP) 与低氧环境对小鼠骨髓间充质干细胞( bone marrow mesenchymal stem cells?BMSCs)成脂肪分化的影响? 方法 实验随机分为4 组:A 组(常氧组)、B 组(1%O2 组)、C 组(常氧+ 10 ̄9mol/ L OGP 组)、D 组(1%O2 +10 ̄9 mol/ L OGP 组)? ELISA 法定量检测低氧诱导因子1α(hypoxia inducible factor 1α?HIF ̄ 1α)蛋白的表达?14 d 后?油红O 染色观察BMSCs 脂滴形成情况?实时荧光定量PCR 和Western blotting 检测成脂相关基因 PPAR ̄γ 和C/ EBPα 的mRNA 和蛋白表达水平? 结果 与A 组及C 组相比?B 组与D 组HIF ̄1α 表达明显上调(P<0?? 01)?与 A 组相比?B 组、C 组、D 组脂滴生成及PPAR ̄γ 和C/ EBPα 的mRNA 和蛋白表达降低(P<0?? 01)?与B 组及C 组相比?D 组中脂 滴生成及PPAR ̄γ 和C/ EBPα 的信使RNA 和蛋白表达下调(P<0?? 01)? 结论 OGP 及1%低氧环境均能抑制BMSCs 成脂分 化?且二者抑制BMSCs 成脂分化具有协同效应?
英文摘要:
      Objective To investigate the effects of osteogenic growth peptide conbined with physical hypoxia on the adipogenic differentiation of mouse bone marrow mesenchymal stem cells. Methods The study was randomly divided into four groups: group A(under normal oxygen level)? group B (under 1% oxygen level)? group C (with 10 ̄9mol / L OGP under normal oxygen level)? group D (with OGP under 1% oxygen level). Cells were collected at 24 h to detect the hypoxia inducible factor 1α(HIF ̄1α) through ELISA .At 14 d?cells were collected to observe the formation of lipid droplets in the cells and to detect the mRNA and protein level of PPAR ̄γ and C / EBPα using qPCR and western ̄blotting. Results  Compared with group A and group C? the expression of HIF ̄1α in the group B and group D upregulated obviously. Compared with that in group A? the lipid droplets accumulation increased and the expression of PPAR ̄γ and C / EBPα on the mRNA and protein level upregulated in the group B? group C and group D? compared with that in group B and group? the lipid droplets accumulation increased and the expression of PPAR ̄γ and C / EBPα on the mRNA and protein level upregulated in the group D. Conclusion OGP and hypoxia can both inhibit the BMSCs adipogenesis and OGP plus hypoxia have co ̄effect to inhibit the adipogenesis of BMSCs
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