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Redox Biol :SIRT1表达抑制或是冠状动脉疾病患者长期复发性缺血事件高风险的原因之一

2017-06-21 Emma MedSci原创

研究人员发现在CAD患者来源的单核细胞中,SIRT1表达水平被抑制而乙酰化p53表达水平升高,LOX-1表达和氧化应激增加,引起来自CAD受试者的单核细胞线粒体功能障碍和单核细胞凋亡,引起炎症反应。此外,研究人员还发现,由于SIRT1表达水平抑制,CAD患者的单核细胞对内皮细胞的粘附增加。

CAD(冠状动脉疾病)是一种原发性的心血管事件,通常是一种进展性疾病,平时可以没有任何症状,但随着时间的转移,病变和病情可能会逐渐地加重。内皮细胞和单核细胞功能障碍引起炎症是CAD中出现血管损伤的主要原因。因此,抑制细胞死亡和控制炎症是改善CAD患者临床预后的潜在可行性措施。SIRT1(Sirtuin1)是依赖于烟酰胺腺嘌呤二核苷酸(NAD+)的组蛋白脱乙酰酶,为Sirtuins家族成员之一,在调节细胞生理过程中起重要作用,与细胞增殖、分化、衰老、凋亡和代谢密切相关,也被认为可以通过抗氧化性、抗炎和抗细胞凋亡性来保护心血管系统。

发表于Redox Biol的一篇文章中,研究人员发现在CAD患者来源的单核细胞中,SIRT1表达水平被抑制而乙酰化p53表达水平升高,LOX-1表达和氧化应激增加,引起来自CAD患者的单核细胞线粒体功能障碍和单核细胞凋亡,引起炎症反应。此外,研究人员还发现,由于SIRT1表达水平抑制,CAD患者的单核细胞对内皮细胞的粘附增加。这解释了CAD患者长期复发性缺血事件一直处于高风险状态的可能机制,并为临床CAD患者的治疗提供新的参考。

原始出处:
Chan SH, et al. SIRT1 inhibition causes oxidative stress and inflammation in patients with coronary artery disease. Redox Biol. 2017 Jun 2;13:301-309.  doi: 10.1016/j.redox.2017.05.027.

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    2017-11-28 sunylz
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    2017-06-23 quxin068

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