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- W2776072414 abstract "The prevalence of atrial fibrillation (AF) is significantly higher in rheumatoid arthritis (RA) patients, but the underlying mechanisms remain poorly understood. The goal of this study was to assess the effects of RA on AF susceptibility and atrial arrhythmogenic remodeling in a rat model of RA.Collagen-induced arthritis was induced in rats by immunization with type II collagen in Freund's incomplete adjuvant. Among the rats that developed arthritis, AF susceptibility and atrial remodeling were examined 8 weeks after the primary immunization. AF inducibility and duration were substantially increased in collagen-induced arthritis rats, and AF duration was significantly and positively correlated with the serum IL-6 and TNF-α levels. Rats with collagen-induced arthritis showed prolonged atrial conduction time with no changes in the atrial effective refractory period. Atrial conduction delay was accompanied by significantly increased atrial fibrosis. In addition, atrial structural and autonomic remodeling, including left atrial dilation, apoptosis and autophagy of atrial myocytes, and atrial heterogeneous sympathetic hyperinnervation, was observed. Interestingly, we found that collagen-induced arthritis had no significant effects on connexins, Nav1.5, and the main ion channels' protein expressions in atria.We demonstrated that RA increased AF susceptibility by inducing AF-promoting atrial remodeling. This study may provide insights into mechanisms underlying RA-induced AF and validate a model that is suitable for further mechanistic and therapeutic exploration." @default.
- W2776072414 created "2018-01-05" @default.
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- W2776072414 date "2017-12-02" @default.
- W2776072414 modified "2023-09-29" @default.
- W2776072414 title "Atrial Fibrillation Promotion in a Rat Model of Rheumatoid Arthritis" @default.
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- W2776072414 doi "https://doi.org/10.1161/jaha.117.007320" @default.
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