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TRAF1/C5 but Not PTPRC Variants Are Potential Predictors of Rheumatoid Arthritis Response to Anti-Tumor Necrosis Factor Therapy

2015; Hindawi Publishing Corporation; Volume: 2015; Linguagem: Inglês

10.1155/2015/490295

2314-6141

Helena Canhão, Ana Maria Rodrigues, María José Santos, Diana Carmona-Fernandes, Bruno Filipe Bettencourt, Jing Cui, Fabiana Lucena Rocha, José António Pereira da Silva, Joaquim Polido‐Pereira, José Alberto Pereira Silva, José António Costa, Domingos Araújo, José António Pereira da Silva, Helena Santos, Cátia Duarte, Rafael Cáliz, Ileana Filipescu, Fernando Pimentel-Santos, Jaime Branco, Juan Sáinz, Robert M. Plenge, Daniel H. Solomon, Jácome Bruges‐Armas, José António Pereira da Silva, João Eurico Fonseca, Elizabeth W. Karlson,

NF-κB Signaling Pathways

Background . The aim of our work was to replicate, in a Southern European population, the association reported in Northern populations between PTPRC locus and response to anti-tumor necrosis factor (anti-TNF) treatment in rheumatoid arthritis (RA). We also looked at associations between five RA risk alleles and treatment response. Methods . We evaluated associations between anti-TNF treatment responses assessed by DAS28 change and by EULAR response at six months in 383 Portuguese patients. Univariate and multivariate linear and logistic regression analyses were performed. In a second step to confirm our findings, we pooled our population with 265 Spanish patients. Results . No association was found between PTPRC rs10919563 allele and anti-TNF treatment response, neither in Portuguese modeling for several clinical variables nor in the overall population combining Portuguese and Spanish patients. The minor allele for RA susceptibility, rs3761847 SNP in TRAF1/C5 region, was associated with a poor response in linear and logistic univariate and multivariate regression analyses. No association was observed with the other allellic variants. Results were confirmed in the pooled analysis. Conclusion . This study did not replicate the association between PTPRC and the response to anti-TNF treatment in our Southern European population. We found that TRAF1/C5 risk RA variants potentially influence anti-TNF treatment response.