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Published in: Arthritis Research & Therapy 1/2020

Open Access 01-12-2020 | Colchicine | Research article

Initiating guideline-concordant gout treatment improves arterial endothelial function and reduces intercritical inflammation: a prospective observational study

Authors: Michael Toprover, Binita Shah, Cheongeun Oh, Talia F. Igel, Aaron Garza Romero, Virginia C. Pike, Fatmira Curovic, Daisy Bang, Deana Lazaro, Svetlana Krasnokutsky, Stuart D. Katz, Michael H. Pillinger

Published in: Arthritis Research & Therapy | Issue 1/2020

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Abstract

Background

Patients with gout have arterial dysfunction and systemic inflammation, even during intercritical episodes, which may be markers of future adverse cardiovascular outcomes. We conducted a prospective observational study to assess whether initiating guideline-concordant gout therapy with colchicine and a urate-lowering xanthine oxidase inhibitor (XOI) improves arterial function and reduces inflammation.

Methods

Thirty-eight untreated gout patients meeting American College of Rheumatology (ACR)/European League Against Rheumatism classification criteria for gout and ACR guidelines for initiating urate-lowering therapy (ULT) received colchicine (0.6 mg twice daily, or once daily for tolerance) and an XOI (allopurinol or febuxostat) titrated to ACR guideline-defined serum urate (sU) target. Treatment was begun during intercritical periods. The initiation of colchicine and XOI was staggered to permit assessment of a potential independent effect of colchicine. Brachial artery flow-mediated dilation (FMD) and nitrate-mediated dilation (NMD) assessed endothelium-dependent and endothelium-independent (smooth muscle) arterial responsiveness, respectively. High-sensitivity C-reactive protein (hsCRP), IL-1β, IL-6, myeloperoxidase (MPO) concentrations, and erythrocyte sedimentation rate (ESR) assessed systemic inflammation.

Results

Four weeks after achieving target sU concentration on colchicine plus an XOI, FMD was significantly improved (58% increase, p = 0.03). hsCRP, ESR, IL-1β, and IL-6 also all significantly improved (30%, 27%, 19.5%, and 18.8% decrease respectively; all p ≤ 0.03). Prior to addition of XOI, treatment with colchicine alone resulted in smaller numerical improvements in FMD, hsCRP, and ESR (20.7%, 8.9%, 13% reductions, respectively; all non-significant), but not IL-1β or IL-6. MPO and NMD did not change with therapy. We observed a moderate inverse correlation between hsCRP concentration and FMD responsiveness (R = − 0.41, p = 0.01). Subgroup analyses demonstrated improvement in FMD after achieving target sU concentration in patients without but not with established cardiovascular risk factors and comorbidities, particularly hypertension and hyperlipidemia.

Conclusions

Initiating guideline-concordant gout treatment reduces intercritical systemic inflammation and improves endothelial-dependent arterial function, particularly in patients without established cardiovascular comorbidities.
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Metadata
Title
Initiating guideline-concordant gout treatment improves arterial endothelial function and reduces intercritical inflammation: a prospective observational study
Authors
Michael Toprover
Binita Shah
Cheongeun Oh
Talia F. Igel
Aaron Garza Romero
Virginia C. Pike
Fatmira Curovic
Daisy Bang
Deana Lazaro
Svetlana Krasnokutsky
Stuart D. Katz
Michael H. Pillinger
Publication date
01-12-2020
Publisher
BioMed Central
Published in
Arthritis Research & Therapy / Issue 1/2020
Electronic ISSN: 1478-6362
DOI
https://doi.org/10.1186/s13075-020-02260-6

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