Activation of transient receptor potential vanilloid 4 is involved in pressure overload-induced cardiac hypertrophy

TRPV4型 压力过载 内科学 内分泌学 肌肉肥大 兴奋剂 下调和上调 瞬时受体电位通道 化学 磷酸化 医学 受体 细胞生物学 生物 心肌肥大 生物化学 基因
作者
Yan Zou,Miaomiao Zhang,Qiongfeng Wu,Ning Zhao,Min‐Wei Chen,Cui Yang,Yimei Du,Bing Han
出处
期刊:eLife [eLife Sciences Publications Ltd]
卷期号:11 被引量:19
标识
DOI:10.7554/elife.74519
摘要

Previous studies, including our own, have demonstrated that transient receptor potential vanilloid 4 (TRPV4) is expressed in hearts and implicated in cardiac remodeling and dysfunction. However, the effects of TRPV4 on pressure overload-induced cardiac hypertrophy remain unclear. In this study, we found that TRPV4 expression was significantly increased in mouse hypertrophic hearts, human failing hearts, and neurohormone-induced hypertrophic cardiomyocytes. Deletion of TRPV4 attenuated transverse aortic constriction (TAC)-induced cardiac hypertrophy, cardiac dysfunction, fibrosis, inflammation, and the activation of NFκB - NOD - like receptor pyrin domain-containing protein 3 (NLRP3) in mice. Furthermore, the TRPV4 antagonist GSK2193874 (GSK3874) inhibited cardiac remodeling and dysfunction induced by TAC. In vitro, pretreatment with GSK3874 reduced the neurohormone-induced cardiomyocyte hypertrophy and intracellular Ca 2+ concentration elevation. The specific TRPV4 agonist GSK1016790A (GSK790A) triggered Ca 2+ influx and evoked the phosphorylation of Ca 2+ /calmodulin-dependent protein kinase II (CaMKII). But these effects were abolished by removing extracellular Ca 2+ or GSK3874. More importantly, TAC or neurohormone stimulation-induced CaMKII phosphorylation was significantly blocked by TRPV4 inhibition. Finally, we show that CaMKII inhibition significantly prevented the phosphorylation of NFκB induced by GSK790A. Our results suggest that TRPV4 activation contributes to pressure overload-induced cardiac hypertrophy and dysfunction. This effect is associated with upregulated Ca 2+ /CaMKII mediated activation of NFκB-NLRP3. Thus, TRPV4 may represent a potential therapeutic drug target for cardiac hypertrophy and dysfunction after pressure overload.
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