Interferon regulatory factor 9 is critical for neointima formation following vascular injury.

Interferon regulatory factor 9 is critical for neointima formation following vascular injury.
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干扰素调节因子 9 对于血管损伤后新内膜的形成至关重要

DOI:
10.1038/ncomms6160
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发表时间:
2014-10-16
影响因子:
16.6
通讯作者:
Li, Hongliang
Li, Hongliang
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Zhang, Shu-Min;Zhu, Li-Hua;Chen, Hou-Zao;Zhang, Ran;Zhang, Peng;Jiang, Ding-Sheng;Gao, Lu;Tian, Song;Wang, Lang;Zhang, Yan;Wang, Pi-Xiao;Zhang, Xiao-Fei;Zhang, Xiao-Dong;Liu, De-Pei;Li, Hongliang

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干扰素调节因子9(IRF 9)具有多种生物学功能并调节细胞存活;然而,其在血管生物学中的作用尚未被探索。在这里,我们证明了IRF 9在血管损伤后介导新生内膜形成中的关键作用。值得注意的是,在小鼠中,IRF 9消融抑制血管平滑肌细胞(VSMC)的增殖和迁移,并减轻对损伤的反应,而IRF 9功能获得促进VSMC增殖和迁移,这加剧了动脉狭窄。从机制上讲,我们表明,转录的新生内膜形成调节SIRT 1直接抑制IRF 9。重要的是,平滑肌细胞中SIRT 1的遗传操作或SIRT 1活性的药理学调节在很大程度上逆转了IRF 9的新内膜形成作用。总之,我们的研究结果表明,IRF 9是一种血管损伤反应分子,促进VSMC增殖,并涉及迄今未被认识到的“IRF 9-SIRT 1轴”在血管增殖病理调节。
Interferon regulatory factor 9 (IRF9) has various biological functions and regulates cell survival; however, its role in vascular biology has not been explored. Here we demonstrate a critical role for IRF9 in mediating neointima formation following vascular injury. Notably, in mice, IRF9 ablation inhibits the proliferation and migration of vascular smooth muscle cells (VSMCs) and attenuates intimal thickening in response to injury, whereas IRF9 gain-of-function promotes VSMC proliferation and migration, which aggravates arterial narrowing. Mechanistically, we show that the transcription of the neointima formation modulator SIRT1 is directly inhibited by IRF9. Importantly, genetic manipulation of SIRT1 in smooth muscle cells or pharmacological modulation of SIRT1 activity largely reverses the neointima-forming effect of IRF9. Together, our findings suggest that IRF9 is a vascular injury-response molecule that promotes VSMC proliferation and implicate a hitherto unrecognized ‘IRF9–SIRT1 axis’ in vasculoproliferative pathology modulation.
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