• Pierre-Antoine Juge, Raphaël Borie, Caroline Kannengiesser, Steven Gazal, Patrick Revy, Lidwine Wemeau-Stervinou, Marie-Pierre Debray, Sébastien Ottaviani, Sylvain Marchand-Adam, Nadia Nathan, Gabriel Thabut, Christophe Richez, Hilario Nunes, Isabelle Callebaut, Aurélien Justet, Nicolas Leulliot, Amélie Bonnefond, David Salgado, Pascal Richette, Jean-Pierre Desvignes, Huguette Lioté, Philippe Froguel, Yannick Allanore, Olivier Sand, Claire Dromer, René-Marc Flipo, Annick Clément, Christophe Béroud, Jean Sibilia, Baptiste Coustet, Vincent Cottin, Marie-Christophe Boissier, Benoit Wallaert, Thierry Schaeverbeke, Florence Dastot le Moal, Aline Frazier, Christelle Ménard, Martin Soubrier, Nathalie Saidenberg, Dominique Valeyre, Serge Amselem, FREX consortium, Catherine Boileau, Bruno Crestani, and Philippe Dieudé.
• APHP, Hôpital Bichat, Service de Rhumatologie, DHU FIRE, Paris, France.
• Eur. Respir. J. 2017 May 1; 49 (5).

AbstractDespite its high prevalence and mortality, little is known about the pathogenesis of rheumatoid arthritis-associated interstitial lung disease (RA-ILD). Given that familial pulmonary fibrosis (FPF) and RA-ILD frequently share the usual pattern of interstitial pneumonia and common environmental risk factors, we hypothesised that the two diseases might share additional risk factors, including FPF-linked genes. Our aim was to identify coding mutations of FPF-risk genes associated with RA-ILD.We used whole exome sequencing (WES), followed by restricted analysis of a discrete number of FPF-linked genes and performed a burden test to assess the excess number of mutations in RA-ILD patients compared to controls.Among the 101 RA-ILD patients included, 12 (11.9%) had 13 WES-identified heterozygous mutations in the TERT, RTEL1, PARN or SFTPC coding regions. The burden test, based on 81 RA-ILD patients and 1010 controls of European ancestry, revealed an excess of TERT, RTEL1, PARN or SFTPC mutations in RA-ILD patients (OR 3.17, 95% CI 1.53-6.12; p=9.45×10-4). Telomeres were shorter in RA-ILD patients with a TERT, RTEL1 or PARN mutation than in controls (p=2.87×10-2).Our results support the contribution of FPF-linked genes to RA-ILD susceptibility.Copyright ©ERS 2017.

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