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TNF-α inhibitors reduce inflammation-induced concentric remodelling, but not diastolic dysfunction in collagen-induced arthritis.

Abstract：

OBJECTIVES:To determine biologic disease-modifying anti-rheumatic drug effects on inflammation-induced cardiac geometry and function changes. METHODS:Male and female Sprague-Dawley rats (n=92) were divided into four groups: control group, collagen-induced arthritis (CIA) group, anti-TNF-α group and anti-IL-6 group. Inflammation was induced by injecting bovine type-II collagen emulsified in incomplete Freund's adjuvant at the base of the tail, in all groups except the control group. Following the onset of arthritis, the anti-TNF-α group received etanercept, and the anti-IL-6 group received tocilizumab, for six weeks. Left ventricular (LV) geometry and function were assessed with echocardiography and circulating inflammatory markers were measured with ELISA. RESULTS:Relative wall thickness in the CIA and anti-IL-6 groups were increased compared to controls (p<0.001 and p=0.02, respectively). TNF-α inhibition protected against inflammation-induced LV concentric remodelling, as relative wall thickness in the anti-TNF-α group was similar to controls (p=0.55). Systolic function variables were not different between the groups. In all groups inoculated with collagen, myocardial relaxation (lateral e') were impaired compared to controls (all p<0.001). LV filling pressures (E/e') were increased in the CIA, anti-TNF-α and anti-IL-6 groups compared to controls (p<0.001, p<0.001 and p=0.05, respectively). Independent of concentric remodelling, circulating CRP concentrations were associated with decreased e' and increased E/e', while TNF-α concentrations were associated with E/A. CONCLUSIONS:TNF-α inhibition protected against inflammation-induced adverse cardiac remodelling, but not diastolic dysfunction. IL-6 receptors blocker effects on inflammation-induced cardiac changes were inconclusive. Systemic inflammation likely impacts LV concentric remodelling and diastolic dysfunction through distinct pathways.

journal_name

Clin Exp Rheumatol

journal_title

Clinical and experimental rheumatology

authors

Le Roux R,Mokotedi L,Fourie S,Manilall A,Gunter S,Millen AME

subject

Has Abstract

pub_date

2021-01-11 00:00:00

eissn

0392-856X

issn

1593-098X

pii

16384

pub_type

杂志文章

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TNF-α inhibitors reduce inflammation-induced concentric remodelling, but not diastolic dysfunction in collagen-induced arthritis.