Pre-miRNA Hsa-Let-7a-2: a Novel Intracellular Partner of Angiotensin II Type 2 Receptor Negatively Regulating its Signals.
Pre-miRNA Hsa-Let-7a-2: a Novel Intracellular Partner of Angiotensin II Type 2 Receptor Negatively Regulating its Signals.
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Pre-miRNA Hsa-Let-7a-2:血管紧张素 II 2 型受体的新型细胞内伙伴,负调节其信号
DOI:
10.7150/ijbs.70455
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发表时间:
2022
影响因子:
9.2
通讯作者:
Cai, Jun
中科院分区:
文献类型:
--
作者:
Liu, Xiaoyan;Chen, Zhenzhen;Li, Shuangyue;Jin, Ling;Cui, Xiao;Cui, Changting;Deng, Yue;Gao, Qiannan;Fan, Luyun;Niu, Yaping;Wang, Wenjie;Cui, Chunmei;Zhong, Jiuchang;Cui, Qinghua;Geng, Bin;Cai, Jun
G protein-coupled receptors (GPCRs) are the largest family of druggable targets, and their biological functions depend on different ligands and intracellular interactomes. Some microRNAs (miRNAs) bind as ligands to RNA-sensitive toll-like receptor 7 to regulate the inflammatory response, thereby contributing to the pathogenesis of cancer or neurodegeneration. It is unknown whether miRNAs bind to angiotensin II (Ang II) type 2 receptor (AGTR2), a critical protective GPCR in cardiovascular diseases, as ligands or intracellular interactomes. Here, screening for miRNAs that bind to AGTR2, we identified and confirmed that the pre-miRNA hsa-let-7a-2 non-competitively binds to the intracellular third loop of AGTR2. Functionally, intracellular hsa-let-7a-2 overexpression suppressed the Ang II-induced AGTR2 effects such as cAMP lowering, RhoA inhibition, and activation of Src homology 2 domain-containing protein-tyrosine phosphatase 1, whereas hsa-let-7a-2 knockdown enhanced these effects. Consistently, overexpressed hsa-let-7a-2 restrained the AGTR2-induced antiproliferation, antimigration, and proapoptosis of cells, and vasodilation of mesenteric arteries. Our findings demonstrated that hsa-let-7a-2 is a novel intracellular partner of AGTR2 that negatively regulates AGTR2-activated signals.
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DOI:
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发表时间:
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影响因子:
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