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Cinacalcet ameliorates aortic calcification in uremic rats via suppression of endothelial-to-mesenchymal transition.

Abstract：

AIM:Experimental studies found that cinacalcet (CINA) markedly attenuated vascular calcification in uremic rats, but its underlying mechanisms are still largely unknown. Recent evidence have demonstrated that endothelial cells (ECs) participate in ectopic calcification in part by mediating endothelial-to-mesenchymal transition (EndMT). In this study, we investigated whether CINA ameliorated aortic calcification in uremic rats via suppression of EndMT. METHODS:Uremia was induced in rats by feeding rats a 0.75% adenine diet for 4 weeks. After adenine withdrawal, the rats were maintained on a 1.03% phosphorus diet for next 8 weeks. At initiation of the adenine diet, rats were orally administered CINA (10mg/kg one day) for 12 weeks. The aortic expression of EndMT- and chondrocyte- markers was examined. The effect of elevated PTH on EndMT was also studied in aortic ECs. RESULTS:In uremic rats, CINA treatment significantly decreased the serum PTH concentrations, but did not affect the elevated levels of serum calcium (Ca), phosphorus (P) and Ca×P product. Besides, CINA significantly attenuated aortic calcification, and inhibited the expression of chondrocyte markers (SOX9 and COL2A1) and chondrocyte proteoglycan in uremic aortas. Moreover, CINA treatment largely abolished the up-regulation of mesenchymal markers (FSP1 and α-SMA) and down-regulation of the endothelial marker (CD31), which accompanied aortic calcification in uremic aorta samples. In vitro, PTH increased the expression of EndMT-markers in a concentration- and time-dependent manner. CONCLUSION:These findings suggest that strategies aiming at reducing serum PTH might prevent uremic aortic calcification by abrogating EndMT.

journal_name

Acta Pharmacol Sin

journal_title

Acta pharmacologica Sinica

authors

Wu M,Tang RN,Liu H,Pan MM,Liu BC

doi

10.1038/aps.2016.83

subject

Has Abstract

pub_date

2016-11-01 00:00:00

pages

1423-1431

issue

11

eissn

1671-4083

issn

1745-7254

pii

aps201683

journal_volume

37

pub_type

杂志文章

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