Regulation of endothelial intracellular adenosine via adenosine kinase epigenetically modulates vascular inflammation.

Regulation of endothelial intracellular adenosine via adenosine kinase epigenetically modulates vascular inflammation.
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通过腺苷激酶调节内皮细胞内腺苷表观遗传调节血管炎症

DOI:
10.1038/s41467-017-00986-7
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发表时间:
2017-10-16
影响因子:
16.6
通讯作者:
Huo Y
Huo Y
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Xu Y;Wang Y;Yan S;Yang Q;Zhou Y;Zeng X;Liu Z;An X;Toque HA;Dong Z;Jiang X;Fulton DJ;Weintraub NL;Li Q;Bagi Z;Hong M;Boison D;Wu C;Huo Y

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血管炎症和相关的炎症性血管疾病的分子机制还不是很清楚。在这里,我们显示内皮细胞内腺苷及其关键调节因子腺苷激酶(ADK)在血管炎症中发挥重要作用。促炎刺激通过增加内皮细胞ADK的表达,降低细胞内腺苷水平,通过增加ADK与S同型半胱氨酸水解酶的结合来激活转甲基化途径,从而导致内皮炎症。通过基因ADK基因敲除或外源性腺苷增加细胞内的腺苷可以减少转甲基化途径的激活,并减弱内皮炎症反应。此外,小鼠内皮细胞ADK的丢失可减轻动脉粥样硬化,并对大脑皮层的缺血/再灌注损伤提供保护。综上所述,这些结果表明,受关键分子调节因子ADK控制的细胞内腺苷影响内皮炎症和血管炎症性疾病。
The molecular mechanisms underlying vascular inflammation and associated inflammatory vascular diseases are not well defined. Here we show that endothelial intracellular adenosine and its key regulator adenosine kinase (ADK) play important roles in vascular inflammation. Pro-inflammatory stimuli lead to endothelial inflammation by increasing endothelial ADK expression, reducing the level of intracellular adenosine in endothelial cells, and activating the transmethylation pathway through increasing the association of ADK with S-adenosylhomocysteine (SAH) hydrolase (SAHH). Increasing intracellular adenosine by genetic ADK knockdown or exogenous adenosine reduces activation of the transmethylation pathway and attenuates the endothelial inflammatory response. In addition, loss of endothelial ADK in mice leads to reduced atherosclerosis and affords protection against ischemia/reperfusion injury of the cerebral cortex. Taken together, these results demonstrate that intracellular adenosine, which is controlled by the key molecular regulator ADK, influences endothelial inflammation and vascular inflammatory diseases.
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