Anti-Cyclic Citrullinated Peptide Antibodies and Severity of Interstitial Lung Disease in Women with Rheumatoid Arthritis

• Main Authors: Alberto Daniel Rocha-Muñoz, Manuel Ponce-Guarneros, Jorge Ivan Gamez-Nava, Eva Maria Olivas-Flores, Mayra Mejía, Pablo Juárez-Contreras, Erika Aurora Martínez-García, Esther Guadalupe Corona-Sánchez, Tania Marlen Rodríguez-Hernández, Mónica Vázquez-del Mercado, Mario Salazar-Páramo, Arnulfo Hernan Nava-Zavala, Ernesto German Cardona-Muñoz, Alfredo Celis, Laura González-Lopez
• Format: Article
• Language: English
• Published: Hindawi Limited 2015-01-01
• Series: Journal of Immunology Research
• Online Access: http://dx.doi.org/10.1155/2015/151626
• ISSN: 2314-8861; 2314-7156

Objective. To evaluate whether serum titers of second-generation anticyclic citrullinated peptide antibodies (anti-CCP2) are associated with the severity and extent of interstitial lung disease in rheumatoid arthritis (RA-ILD). Methods. In across-sectional study, 39 RA-ILD patients confirmed by high-resolution computed tomography (HRCT) were compared with 42 RA without lung involvement (RA only). Characteristics related to RA-ILD were assessed in all of the patients and serum anti-CCP2 titers quantified. Results. Higher anti-CCP2 titers were found in RA-ILD compared with RA only (medians 77.9 versus 30.2 U/mL, P<0.001). In the logistic regression analysis after adjustment for age, disease duration (DD), smoke exposure, disease activity, functioning, erythrocyte sedimentation rate, and methotrexate (MTX) treatment duration, the characteristics associated with RA-ILD were higher anti-CCP2 titers (P=0.003) and + RF (P=0.002). In multivariate linear regression, the variables associated with severity of ground-glass score were anti-CCP2 titers (P=0.02) and with fibrosis score DD (P=0.01), anti-CCP2 titers (P<0.001), and MTX treatment duration (P<0.001). Conclusions. Anti-CCP2 antibodies are markers of severity and extent of RA-ILD in HRCT. Further longitudinal studies are required to identify if higher anti-CCP2 titers are associated with worst prognosis in RA-ILD.