Circ Res:MicroRNA-181b调节TIMP-3和弹性蛋白来调控动脉粥样硬化和动脉瘤

2017-03-20 MedSci MedSci原创

近日,心血管领域权威杂志Circulation Research上发表了一篇研究文章,研究人员探索miR-181b是否通过调节基质金属蛋白酶的组织抑制剂3(TIMP-3)表达而影响动脉粥样硬化和动脉瘤。

动脉粥样硬化和动脉瘤是目前世界上死亡率较高的疾病。MicroRNA(miR)是调控基因和蛋白表达的关键因素且与许多血管疾病相关。目前对于miR在动脉粥样硬化斑块和腹主动脉瘤稳定性中的作用了解甚少。

近日,血管领域权威杂志Circulation Research上发表了一篇研究文章,研究人员探索miR-181b是否通过调节基质金属蛋白酶的组织抑制剂3(TIMP-3)表达而影响动脉粥样硬化和动脉瘤。

研究发现miR-181b在人动脉粥样硬化斑块和腹主动脉瘤中高表达,并与TIMP-3和弹性蛋白的表达减少相关。给予Apoe - / - 和Ldlr - / -小鼠动脉粥样硬化模型抗miR-181b处理延迟了动脉粥样硬化斑块的发生发展。给予血管紧张素II+ Apoe - / - 或Ldlr - / - 小鼠抗miR-181b处理减轻了升主动脉、胸腹主动脉内动脉瘤的形成发展。此外抗miR-181b大大增加了弹性蛋白和胶原表达,促进纤维化并稳定斑块和动脉瘤。miR-181b负性调节巨噬细胞TIMP-3和血管平滑肌细胞产生弹性蛋白,而这两者都是维持动脉粥样硬化斑块和动脉瘤稳定的重要因素。在Timp3 - / - 小鼠中验证实验发现,抑制miR-181b得到的有益后果主要是通过TIMP-3和提高弹性蛋白合成。

研究结果表明miR-181b及其靶基因是动脉粥样硬化和动脉瘤稳定性的治疗靶点。

原始出处:Di Gregoli K, Mohamad Anuar NN,et al. MicroRNA-181b Controls Atherosclerosis and Aneurysms Through Regulation of TIMP-3 and Elastin. Circ Res. 2017 Jan 6;120(1):49-65.

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    2017-08-18 xjy02
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    2017-03-24 虈亣靌

    学习新知识谢谢分享

    0

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    2017-03-22 zhouqu_8

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本研究结果表明AMPKα1通过促进CHOP在丝氨酸30的磷酸化介导巨噬细胞中CHOP的泛素化和蛋白酶体降解。AMPKα1可能是预防动脉粥样硬化易损性斑块形成的有效治疗目标。

汇总:近期动脉粥样硬化学术研究成果

动脉粥样硬化(atherosclerosis,AS)是冠心病、脑梗死、外周血管病的主要原因,是动脉壁上沉积一层包括胆固醇结晶在内的粥样物质,使动脉弹性降低、管腔变窄,常导致心肌梗塞、中风等致命疾病发生。关于近期动脉粥样硬化相关研究重大成果,小M与您分享。【1】Diabetes Care:高级糖基化终末产物、氧化产物和动脉粥样硬化程度相关性分析 近日,糖尿病领域权威杂志Diabetes

Sci Rep:研究揭示代谢疾病发病机制

在最近的一项研究中,来自Marshall大学Joan C.Edwards医学院的研究者们利用一种叫做pNaKtide的多肽抑制了细胞中的钠-钾泵的氧化扩增的功能。这一作用能够用于缓解实验性非酒精脂肪肝以及动脉粥样硬化等疾病。 这一研究结果发表在最近一期的《scientific report

JBC:尹慧勇研究组发现对动脉粥样硬化具有保护作用的磷脂氧化产物

2017年2月15日,国际知名生物化学杂志《Journal of BioLogical Chemistry》在线发表了中国科学院上海生命科学研究院健康科学研究所尹慧勇组的研究论文