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Possible role of rivaroxaban in attenuating pressure-overload-induced atrial fibrosis and fibrillation.

Abstract：

BACKGROUND:Coagulation factor Xa (FXa) promotes thrombus formation and exacerbates inflammation via activation of protease-activated receptor (PAR)-2. We tested the hypothesis of whether administration of direct oral anticoagulant, rivaroxaban, would attenuate transverse aortic constriction (TAC)-induced atrial inflammatory fibrosis and vulnerability to atrial fibrillation (AF) in mice. METHODS:Ten-week-old male CL57/B6 mice were divided into a sham-operation (CNT) group and TAC-surgery group. These two groups were then subdivided into vehicle (VEH) and rivaroxaban (RVX) treatment (30μg/g/day) groups. We assessed PAR-2 expression in response to TAC-related stimulation using rat cultured cells. RESULTS:TAC-induced left atrial thrombus formation was not observed in the TAC-RVX group. Cardiac PAR-2 upregulation was observed in both TAC groups. In the quantitative analysis of mRNA levels, cardiac PAR-2 upregulation was attenuated in the TAC-RVX group compared to TAC-VEH group. In histological evaluation, the TAC-VEH group showed cardiac inhomogeneous interstitial fibrosis and abundant infiltration of macrophages, which were attenuated by RVX administration. Electrophysiological examination revealed that AF duration in the TAC group was shortened by RVX administration. TAC-induced protein overexpression of monocyte chemoattractant protein-1, and mRNA overexpression of tumor necrosis factor-α, interleukin (IL)-1β and IL-6 in the left atrium was suppressed by RVX treatment. In cardiac fibroblasts, persistent intermittent stretch upregulated PAR-2, which was suppressed by RVX pre-incubation. CONCLUSIONS:These observations demonstrate that coagulation FXa inhibitor probably has a cardioprotective effect against pressure-overload-induced atrial remodeling.

journal_name

J Cardiol

journal_title

Journal of cardiology

authors

Kondo H,Abe I,Fukui A,Saito S,Miyoshi M,Aoki K,Shinohara T,Teshima Y,Yufu K,Takahashi N

doi

10.1016/j.jjcc.2017.08.007

subject

Has Abstract

pub_date

2018-03-01 00:00:00

pages

310-319

issue

3

eissn

0914-5087

issn

1876-4738

pii

S0914-5087(17)30239-3

journal_volume

71

pub_type

杂志文章

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