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Marouen S, du Cailar G, Audo R, Lukas C, Vial G, Tournadre A, Barrat E, Ribstein J, Combe B, Morel J, Daien CI. Sodium excretion is higher in patients with rheumatoid arthritis than in matched controls. PLoS One 2017; 12:e0186157. [PMID: 29028829 PMCID: PMC5640209 DOI: 10.1371/journal.pone.0186157] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2017] [Accepted: 09/26/2017] [Indexed: 01/06/2023] Open
Abstract
Objective It was shown that sodium can promote auto-immunity through the activation of the Th17 pathway. We aimed to compare sodium intake in patients with rheumatoid arthritis (RA) vs. matched controls. Methods This case-control study included 24 patients with RA at diagnosis and 24 controls matched by age, gender and body mass index. Sodium intake was evaluated by 24-hr urinary sodium excretion. Results Sodium excretion was greater for patients with early RA (2,849±1,350 vs. 2,182±751.7mg/day, p = 0.039) than controls. This difference remained significant after adjustment for smoking and the use of anti-hypertensive and nonsteroidal anti-inflammatory drugs (p = 0.043). Patients with radiographic erosion at the time of diagnosis had a higher sodium excretion than those without (p = 0.028). Conclusion Patients with early RA showed increased sodium excretion which may have contributed to autoimmunity.
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Affiliation(s)
- Sarah Marouen
- Rheumatology Department, Lapeyronie Hospital and Montpellier University, Montpellier, France
| | - Guilhem du Cailar
- Internal medicine and hypertension, Lapeyronie Hospital and Montpellier University, Montpellier, France
| | - Rachel Audo
- Rheumatology Department, Lapeyronie Hospital and Montpellier University, Montpellier, France
- Institute of molecular genetic, UMR5535, CNRS, Montpellier, France
| | - Cedric Lukas
- Rheumatology Department, Lapeyronie Hospital and Montpellier University, Montpellier, France
| | - Gaelle Vial
- Rheumatology Department, Gabriel-Montpied Hospital and Clermont-Ferrand University, Clermont-Ferrand, France
| | - Anne Tournadre
- Rheumatology Department, Gabriel-Montpied Hospital and Clermont-Ferrand University, Clermont-Ferrand, France
| | | | - Jean Ribstein
- Internal medicine and hypertension, Lapeyronie Hospital and Montpellier University, Montpellier, France
| | - Bernard Combe
- Rheumatology Department, Lapeyronie Hospital and Montpellier University, Montpellier, France
- Institute of molecular genetic, UMR5535, CNRS, Montpellier, France
| | - Jacques Morel
- Rheumatology Department, Lapeyronie Hospital and Montpellier University, Montpellier, France
- Institute of molecular genetic, UMR5535, CNRS, Montpellier, France
| | - Claire I. Daien
- Rheumatology Department, Lapeyronie Hospital and Montpellier University, Montpellier, France
- Institute of molecular genetic, UMR5535, CNRS, Montpellier, France
- * E-mail:
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