Stem cells:TLR4-PAR1轴调控实验性细菌性肺炎的骨髓间充质干细胞的存活和治疗作用

2018-02-20 MedSci MedSci原创

现已发现骨髓来源的间充质干细胞在肺炎和肺损伤的实验模型中具有重要的治疗作用。Naceen Gupta等人对Toll样受体4(TLR4)和蛋白激酶激活受体1(PAR1)通路对间充质干细胞(MSC)在肺炎的小鼠模型中存活和治疗活性的作用进行研究。分离来源于TLR4-/-和R41Q-PAR1突变小鼠的MSCs,检测突变的特异性通路,在体外细胞毒性刺激下,对MSC存活情况的影响。此外,并利用一大肠杆菌肺炎

现已发现骨髓来源的间充质干细胞在肺炎和肺损伤的实验模型中具有重要的治疗作用。Naceen Gupta等人对Toll样受体4(TLR4)和蛋白激酶激活受体1(PAR1)通路对间充质干细胞(MSC)在肺炎的小鼠模型中存活和治疗活性的作用进行研究。

分离来源于TLR4-/-和R41Q-PAR1突变小鼠的MSCs,检测突变的特异性通路,在体外细胞毒性刺激下,对MSC存活情况的影响。此外,并利用一大肠杆菌肺炎模型评估上述特异性通路在活体内对MSC的治疗活性的影响。

研究结果显示,在体外炎性应激条件下,MSCs的TLR4或PAR1通路突变会抑制细胞存活、消除其活体内的治疗作用。同时,刺激MSCs的TLR4通路,可导致MSCs分泌低水平的凝血酶原,而打乱TLR4通路则可破坏通过PAR1对凝血酶反应的经典信号通路。

总而言之,本研究证实TLR4和PAR1对于体外炎性条件下的MSC存活和体内的治疗活性均是需要的,此外,在MSC是中,TLR4信号通过PAR1调节信号传递。

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    2018-08-12 维他命
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    2018-05-16 lujian
  5. 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  6. 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  7. 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    2018-03-07 lilianxiang
  8. 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