The Fas/Fap-1/Cav-1 complex regulates IL-1RA secretion in mesenchymal stem cells to accelerate wound healing.

The Fas/Fap-1/Cav-1 complex regulates IL-1RA secretion in mesenchymal stem cells to accelerate wound healing.
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DOI:
10.1126/scitranslmed.aai8524
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发表时间:
2018-03-14
影响因子:
17.1
通讯作者:
Shi S
Shi S
中科院分区:
医学1区
文献类型:
--
作者:
Kou X;Xu X;Chen C;Sanmillan ML;Cai T;Zhou Y;Giraudo C;Le A;Shi S

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间充质干细胞(MSC)能够分泌外泌体、细胞外囊泡和细胞因子来调节细胞和组织的稳态。然而,目前尚不清楚MSC是否使用特定的胞吐融合机制来分泌外泌体和细胞因子。我们发现,Fas与Fas相关磷酸酶-1(Fap-1)和小窝蛋白-1(Cav-1)结合,激活一种常见的可溶性N-乙基马来酰亚胺敏感因子(NSF)附着蛋白受体(SNARE)介导的膜融合机制,在MSC中释放小细胞外囊泡(sEVs)。此外,我们揭示了MSC产生并分泌与sEV相关的白细胞介素-1受体拮抗剂(IL-1 RA),以通过Fas/Fap-1/Cav-1级联反应维持牙龈中的快速伤口愈合。肿瘤坏死因子-α(TNF-α)通过核因子κB途径上调Fas和Fap-1的表达,促进IL-1 RA的释放。这项研究确定了一个以前未知的Fas/Fap-1/Cav-1轴,它调节干细胞中SNARE介导的sEV和IL-1 RA分泌,这有助于加速伤口愈合。
Mesenchymal stem cells (MSCs) are capable of secreting exosomes, extracellular vesicles, and cytokines to regulate cell and tissue homeostasis. However, it is unknown whether MSCs use a specific exocytotic fusion mechanism to secrete exosomes and cytokines. We show that Fas binds with Fas-associated phosphatase–1 (Fap-1) and caveolin-1 (Cav-1) to activate a common soluble N-ethylmaleimide–sensitive factor (NSF) attachment protein receptor (SNARE)–mediated membrane fusion mechanism to release small extracellular vesicles (sEVs) in MSCs. Moreover, we reveal that MSCs produce and secrete interleukin-1 receptor antagonist (IL-1RA) associated with sEVs to maintain rapid wound healing in the gingiva via the Fas/Fap-1/Cav-1 cascade. Tumor necrosis factor–α (TNF-α) serves as an activator to up-regulate Fas and Fap-1 expression via the nuclear factor κB pathway to promote IL-1RA release. This study identifies a previously unknown Fas/Fap-1/Cav-1 axis that regulates SNARE-mediated sEV and IL-1RA secretion in stem cells, which contributes to accelerated wound healing.
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