Exosomes derived from macrophages upon cobalt ion stimulation promote angiogenesis

被引:13
|
作者
Zhang, He [1 ]
Zhao, Yuyu [1 ]
Zhang, Yi [1 ]
Hang, Ruiyue [1 ]
Yao, Xiaohong [1 ]
Hang, Ruiqiang [1 ]
机构
[1] Taiyuan Univ Technol, Inst New Carbon Mat, Coll Mat Sci & Engn, Lab Biomat Surfaces & Interfaces, Taiyuan 030024, Peoples R China
关键词
Cobalt ions; Macrophages; Exosomes; Endothelial cells; Angiogenesis; NITRIC-OXIDE; EXTRACELLULAR VESICLES; MOLECULAR-MECHANISMS; TITANIUM; CELLS; OSTEOIMMUNOMODULATION; ALLOYS; VEGF;
D O I
10.1016/j.colsurfb.2021.111742
中图分类号
Q6 [生物物理学];
学科分类号
071011 ;
摘要
Angiogenesis is critical for tissue repair and regeneration, including implant osseointegration. It is well known that macrophages exert immunomodulatory functions in angiogenesis. However, whether macrophage-derived exosomes participate in the process is still unclear. Cobalt (Co) ions are frequently used as implant additives to mimic hypoxic microenvironment, which can induce angiogenesis through stabilizing hypoxia inducible factor-1 alpha (HIF-1 alpha) of macrophages and endothelial cells (ECs). The present work attempts to investigate whether exosomes derived from macrophages upon Co ion stimulation can mediate angiogenesis and the possible mechanism. The results show that the exosomes promote endothelial migration and angiogenesis in vitro and in vivo, particularly when Co ion concentration is 200 mu M. Further studies reveal that the exosomes upregulating nitric oxide (NO), vascular endothelial growth factor (VEGF), and integrin beta 1 expression may be the underlying mechanism of the observations. Our findings provide new insights for Co ion mediated macrophage-EC communication and surface design of biomaterials from the perspective of pro-angiogenesis.
引用
收藏
页数:10
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