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Abstract: Endothelial dysfunction in young patients with long-term rheumatoid arthritis and low disease activity

  [ 37 votes ]   [ Discuss This Article ] • September 18, 2003

Atherosclerosis. 2003 Sep;170(1):177-80.

Hansel S, Lassig G, Pistrosch F, Passauer J.

Medizinische Klinik III/Rheumatology, Universitatsklinikum Carl Gustav Carus der Technischen Universitat Dresden, Fetscherstrasse 74, 01307, Dresden, Germany

OBJECTIVE: Cardiovascular mortality is excessive in patients with rheumatoid arthritis (RA). It has been proposed that the chronic inflammatory state of RA contributes to accelerated atherosclerosis.

The aim of this study was to determine whether endothelial dysfunction, an early sign of arteriosclerosis, is present in young, long-term RA patients receiving standard methotrexate (MTX) therapy. Furthermore, we tested whether etanercept (ENC), a TNF-alpha receptor blocker, resulted in improved endothelial function compared to MTX in the same patients.

METHODS: We studied eight RA patients twice: (1) on MTX and (2) after MTX washout and receiving ENC. Eight healthy volunteers matching for age, gender, height, weight and conventional cardiovascular risk factors served as control (C). All participants received intrabrachial infusions of increasing doses of acetylcholine (ACh, endothelium-dependent vasodilator) and glyceryl-trinitrate (GTN, endothelium-independent vasodilator). Forearm blood flow (FBF) was measured by bilateral venous occlusion plethysmography.

RESULTS: Disease activity of RA was comparably low during both MTX and ENC (DAS 28 3.9+/-0.3 and 3.5+/-0.3). FBF in response to ACh was reduced in RA compared to C (P<0.01). Switching from MTX to ENC failed to improve vascular responsiveness to ACh. GTN comparably increased FBF in all groups.

CONCLUSIONS: Our study for the first time demonstrates that long-term RA is associated with manifested endothelial dysfunction. Switching from MTX to ENC in stable RA patients has no beneficial effect on endothelial function.

PMID: 12957697 [PubMed - in process]

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