Calcitonin gene-related peptide inhibits the cardiac fibroblasts senescence in cardiac fibrosis via up-regulating klotho expression.

Abstract:

:It has been documented cardiac fibroblasts as the predominant cell population undergoing senescence in heart. Calcitonin gene-related peptide (CGRP) exhibits a wide range of cardiovascular protective effects. Whether CGRP protects against cardiac fibroblasts senescence in cardiac fibrosis remains unknown. Here, we detected the down-regulation of CGRP concomitant with senescence in fibrotic myocardium, both hypertension- induced left ventricular fibrosis in SHR rats and hypoxia-induced right ventricular fibrosis in pulmonary artery hypertension rats. Exogenous CGRP inhibited the cardiac fibroblasts senescence and senescence-associated secretory phenotype (SASP) induced by TGF-β1, which was abolished by CGRP8-37, a selective CGRP receptor antagonist. Moreover, the expression of klotho, an anti-senescence protein, was down-regulated in fibrotic myocardium, and CGRP up-regulated the klotho expression in TGF-β1-treated cardiac fibroblasts. Klotho knockdown by siRNA reversed the inhibition of CGRP on senescence and SASP induced by TGF-β1 in cardiac fibroblasts. These results suggested that CGRP inhibited the cardiac fibroblasts senescence and SASP in cardiac fibrosis via up-regulating klotho expression.

journal_name

Eur J Pharmacol

authors

Li WQ,Tan SL,Li XH,Sun TL,Li D,Du J,Wei SS,Li YJ,Zhang BK

doi

10.1016/j.ejphar.2018.10.023

subject

Has Abstract

pub_date

2019-01-15 00:00:00

pages

96-103

eissn

0014-2999

issn

1879-0712

pii

S0014-2999(18)30606-X

journal_volume

843

pub_type

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