环状RNA ZBTB46缺失通过AKT/mTOR通路调节hnRNPA2B1的泛素化和降解,从而缓解动脉粥样硬化的进展。

IF 5.2 2区 医学 Q1 GERIATRICS & GERONTOLOGY
Yahong Fu, Qiaowei Jia, Mengmeng Ren, Hengjie Bie, Xin Zhang, Qian Zhang, Shu He, Chengcheng Li, Hanxiao Zhou, Yanjun Wang, Xiongkang Gan, Zhengxian Tao, Xiumei Chen, Enzhi Jia
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引用次数: 0

摘要

背景:CircZBTB46已被确定与冠状动脉疾病(CAD)的风险相关,并有可能成为CAD的诊断性生物标志物。然而,circZBTB46在CAD中的具体功能和详细机制尚不清楚。方法:采用qRT-PCR、RNA FISH和亚细胞定位分析检测circRNAs的表达水平和性质。ApoE-/-小鼠饲喂高脂饲料,建立动脉粥样硬化模型。采用HE、Masson和Oil Red O染色分析斑块的形态学特征。CCK-8、Transwell和伤口愈合试验以及流式细胞术分析用于评估细胞增殖、迁移和凋亡。采用RNA拉下、银染色、质谱分析和RNA结合蛋白免疫沉淀(RIP)鉴定circZBTB46的相互作用蛋白。结果:CircZBTB46高度保守,在动脉粥样硬化病变中表达显著上调。功能研究显示,敲低circZBTB46可显著减少动脉粥样硬化斑块面积,减缓动脉粥样硬化的进展。此外,沉默circZBTB46可抑制细胞增殖和迁移,诱导细胞凋亡。机制上,circZBTB46物理上与hnRNPA2B1相互作用,抑制其降解,从而调节细胞功能和主动脉粥样硬化斑块的形成。此外,circZBTB46被鉴定为pten依赖性调节AKT/mTOR信号通路的功能介质,从而影响细胞增殖和迁移并诱导细胞凋亡。结论:我们的研究首次提供了直接证据,证明circZBTB46通过与hnRNPA2B1相互作用并调节PTEN/AKT/mTOR通路,作为CAD进展的重要调节分子。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Circular RNA ZBTB46 depletion alleviates the progression of Atherosclerosis by regulating the ubiquitination and degradation of hnRNPA2B1 via the AKT/mTOR pathway.

Background: CircZBTB46 has been identified as being associated with the risk of coronary artery disease (CAD) and has the potential to be a diagnostic biomarker for CAD. However, the specific function and detailed mechanism of circZBTB46 in CAD are still unknown.

Methods: The expression levels and properties of circRNAs were examined using qRT‒PCR, RNA FISH, and subcellular localization analysis. ApoE-/- mice fed a high-fat diet were used to establish an atherosclerosis model. HE, Masson, and Oil Red O staining were used to analyze the morphological features of the plaque. CCK-8, Transwell, and wound healing assays, and flow cytometric analysis were used to evaluate cell proliferation, migration, and apoptosis. RNA pull-down, silver staining, mass spectrometry analysis, and RNA-binding protein immunoprecipitation (RIP) were performed to identify the interacting proteins of circZBTB46.

Results: CircZBTB46 is highly conserved and is significantly upregulated in atherosclerotic lesions. Functional studies revealed that knockdown of circZBTB46 significantly decreased the atherosclerotic plaque area, attenuating the progression of atherosclerosis. In addition, silencing circZBTB46 inhibited cell proliferation and migration and induced apoptosis. Mechanistically, circZBTB46 physically interacted with hnRNPA2B1 and suppressed its degradation, thereby regulating cell functions and the formation of aortic atherosclerotic plaques. Additionally, circZBTB46 was identified as a functional mediator of PTEN-dependent regulation of the AKT/mTOR signaling pathway and thus affected cell proliferation and migration and induced apoptosis.

Conclusion: Our study provides the first direct evidence that circZBTB46 functions as an important regulatory molecule for CAD progression by interacting with hnRNPA2B1 and regulating the PTEN/AKT/mTOR pathway.

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来源期刊
Immunity & Ageing
Immunity & Ageing GERIATRICS & GERONTOLOGY-IMMUNOLOGY
CiteScore
10.20
自引率
3.80%
发文量
55
期刊介绍: Immunity & Ageing is a specialist open access journal that was first published in 2004. The journal focuses on the impact of ageing on immune systems, the influence of aged immune systems on organismal well-being and longevity, age-associated diseases with immune etiology, and potential immune interventions to increase health span. All articles published in Immunity & Ageing are indexed in the following databases: Biological Abstracts, BIOSIS, CAS, Citebase, DOAJ, Embase, Google Scholar, Journal Citation Reports/Science Edition, OAIster, PubMed, PubMed Central, Science Citation Index Expanded, SCImago, Scopus, SOCOLAR, and Zetoc.
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