Interleukin 10 Treatment Ameliorates High-Fat Diet-Induced Inflammatory Atrial Remodeling and Fibrillation

Circulation. Arrhythmia and Electrophysiology
Hidekazu KondoNaohiko Takahashi

Abstract

Obesity, characterized by systemic low-grade inflammation, is considered a well-known risk for atrial fibrillation. In fact, IL-10 (interleukin 10), which is a potent anti-inflammatory cytokine, has been reported to decrease in obese and diabetic patients. We tested the hypotheses forwarding that genetic deletion of IL-10 exacerbates high-fat diet (HFD)-induced obesity-caused atrial inflammation, lipidosis, fibrosis, and fibrillation and that IL-10 therapy inhibits this pathology. Eight- to 10-week-old male CL57/B6 (wild-type) mice and IL-10 knockout mice were divided into a 12-week HFD group and a 12-week normal-fat diet (NFD) group, respectively. In addition, the effect of IL-10 administration was also investigated. HFD-induced obesity for 12 weeks significantly depressed serum levels of IL-10 but were found to increase several proinflammatory cytokines in wild-type mice. Adverse atrial remodeling, including atrial inflammation, lipidosis, and fibrosis, was induced in both wild-type and IL-10 knockout mice by HFD. Vulnerability to atrial fibrillation was also significantly enhanced by HFD. With regard to epicardial and pericardial adipose tissue, the total amount of epicardial adipose tissue+pericardial adipose tissue volume ...Continue Reading

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