Toxicol Sci:AhR在人间充质干细胞分化中的作用研究

2018-09-12 MedSci MedSci原创

多能间充质干细胞保持分化成脂肪形成,软骨形成或成骨细胞谱系的能力。越来越多的人担心暴露于环境因子如芳烃受体(AhR)配体可能扰乱负责正常骨形成的成骨通路。本研究旨在评估原型AhR配体2,3,7,8-四氯二苯并二恶英(TCDD)在体外破坏人骨衍生间充质干细胞(hBMSCs)成骨分化的潜力。 将来自三个供体的原代hBMSC暴露于10nM TCDD,并使用选择的成骨组织学,生物化学和转录标记物来鉴

多能间充质干细胞保持分化成脂肪形成,软骨形成或成骨细胞谱系的能力。越来越多的人担心暴露于环境因子如芳烃受体(AhR)配体可能扰乱负责正常骨形成的成骨通路。本研究旨在评估原型AhR配体2,3,7,8-四氯二苯并二恶英(TCDD)在体外破坏人骨衍生间充质干细胞(hBMSCs)成骨分化的潜力。

将来自三个供体的原代hBMSC暴露于10nM TCDD,并使用选择的成骨组织学,生物化学和转录标记物来鉴定分化。结果显示,暴露于10nM TCDD导致初级hBMSCs分化的末期阶段碱性磷酸酶(ALP)活性和基质矿化的减弱。在转录水平,转录调节因子DLX5和其他成骨标志物(ALP,OPN和IBSP)的表达减弱;相反,FGF9和FGF18的表达上调。干细胞效能标志物SOX2,NANOG和SALL4的表达在成骨对照中降低,而在TCDD处理的细胞中的表达与未分化细胞的表达类似。与AhR拮抗剂GNF351共暴露后可阻断TCDD介导的基质矿化的减弱,且完全或部分拯救与成骨调节、ECM和/或维持多能性相关的基因的表达。

因此,该研究结果表明,AhR反式激活可减弱多潜能hBMSCs的成骨细胞分化。该研究还强调了使用原代人MSCs来评估体外化学和药物制剂的骨诱导或骨毒性潜力。

原始出处:

Watson ATD, Nordberg RC, et al., Experimental evidence for an inhibitory role of AhR activation in human mesenchymal stem cell differentiation. Toxicol Sci. 2018 Sep 7. doi: 10.1093/toxsci/kfy225.

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    2018-09-12 医者仁心5538

    学习了

    0

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    2018-09-12 明月清辉

    谢谢分享,学习了

    0