Influence of IL6R rs8192284 polymorphism status in disease activity in rheumatoid arthritis.

Lamas, José Ramón; Rodríguez-Rodríguez, Luis; Varadé, Jezabel; López-Romero, Pedro; Tornero-Esteban, Pilar; Abasolo, Lydia; Urcelay, Elena; Fernández-Gutiérrez, Benjamín · J Rheumatol · 2010

prospective_cohort · Level II

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Abstract

To analyze the influence of IL6R rs8192284 polymorphism on the disease activity of rheumatoid arthritis (RA). Patients with RA (n = 281) were followed for a median of 4.2 years. A total of 1143 disease activity measurements using the 28-joint count Disease Activity Score (DAS28) were performed. A mixed-effect model was used to analyze the measurements. A statistically significant interaction was observed between IL6R rs8192284 polymorphism and the presence of anticyclic citrullinated peptide (anti-CCP) antibodies (p = 0.008). An inverse relationship between the polymorphism and DAS28 was observed depending on anti-CCP status. The anti-CCP status in patients with RA determines the association between the IL6R rs8192284 polymorphism and disease activity.

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