J Tissue Eng Regen Med:外泌体在调节骨免疫中也发挥作用

2019-07-31 不详 网络

骨髓间充质干/基质细胞(BMSCs)可分化为骨形成成骨细胞,在骨再生中起关键作用。外来体是天然细胞分泌的纳米囊泡,并且最近在生理和病理条件下被重新定义为细胞通讯的新兴介质。本研究旨在通过外来体介导的途径研究复杂的细胞通讯,尤其是分化的BMSC,免疫细胞(例如巨噬细胞)和新募集的BMSC中的细胞通讯。首先在不同阶段(分别为第0天,第3天,第7天和第14天)从骨生成分化的BMSC中分离外泌体。在巨噬细

骨髓间充质干/基质细胞(BMSCs)可分化为骨形成成骨细胞,在骨再生中起关键作用。外来体是天然细胞分泌的纳米囊泡,并且最近在生理和病理条件下被重新定义为细胞通讯的新兴介质。本研究旨在通过外来体介导的途径研究复杂的细胞通讯,尤其是分化的BMSC,免疫细胞(例如巨噬细胞)和新募集的BMSC中的细胞通讯。

首先在不同阶段(分别为第0天,第3天,第7天和第14天)从骨生成分化的BMSC中分离外泌体。在巨噬细胞和人BMSC(hBMSC)中检查分离的外泌体的细胞摄取。在各种成骨分化阶段(0d-exo,3d-exo,7d-exo和14d-exo)收集的外泌体对hBMSC的存活率没有影响。

结果显示,外泌体(0d-exo,3d-exo和7d-exo)的摄取显著降低了促炎基因表达和M1表型标记(iNOS)的水平。我们的结果显示3d-exo,7d-exo和14d-exo导致MSC迁移明显增加。此外,0d-exo显著促进早期成骨标志物的表达,例如碱性磷酸酶(ALP)和骨形态发生蛋白2(BMP-2),表明hBMSC衍生的外泌体的促骨原性作用。

总之,这些结果表明来自分化的MSCs的外泌体在骨动力学的调节中发挥独特的骨免疫调节作用。

原始出处:

Wei F, Li Z, et al., Immunoregulatory role of exosomes derived from differentiating mesenchymal stromal cells on inflammation and osteogenesis. J Tissue Eng Regen Med. 2019 Jul 30. doi: 10.1002/term.2947.

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    2019-09-15 spoonycyy
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    2019-09-10 xuyu
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