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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Abatacept and Reduced Immune Response to Pandemic 2009 Influenza A/H1N1 Vaccination in Patients With Rheumatoid Arthritis

Texto completo
Autor(es):
Ribeiro, Ana C. [1] ; Laurindo, Ieda M. [1] ; Guedes, Lissiane K. [1] ; Saad, Carla G. [1] ; Moraes, Julio C. [1] ; Silva, Clovis A. [1] ; Bonfa, Eloisa [1]
Número total de Autores: 7
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Sao Paulo - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: ARTHRITIS CARE & RESEARCH; v. 65, n. 3, p. 476-480, MAR 2013.
Citações Web of Science: 45
Resumo

Objective. To evaluate the influence of abatacept (ABA) and associated contributing factors on pandemic 2009 influenza A/H1N1 vaccine immunogenicity in rheumatoid arthritis (RA) patients. Methods. The response to a nonadjuvanted monovalent pandemic 2009 influenza A/H1N1 killed virus vaccine was analyzed in 11 RA patients using ABA (RA-ABA), most with concomitant nonbiologic disease-modifying antirheumatic drugs (DMARDS), and compared to 33 age-matched RA patients on methotrexate (MTX) and 55 healthy controls, all without previous seroprotection. Clinical and laboratory evaluations were performed before and 21 days after vaccination. Anti-influenza antibody titers were measured by hemagglutination inhibition assay. Seroprotection (antibody titers >= 1:40) and the factor increase (FI) in the geometric mean titers (GMTs) were calculated. Prevaccination lymphocyte counts and gammaglobulin levels were determined. Results. Sex distribution, disease duration, and the Disease Activity Score in 28 joints were similar in the RA groups (P > 0.05). After vaccination, seroprotection was significantly reduced in RA-ABA patients compared to RA-MTX patients (9% versus 58%; P = 0.006) and controls (69%; P <= 0.001). FI-GMT was severely reduced in RA-ABA patients compared to RA-MTX patients (1.8 {[}1.4-2.3] versus 8.7 {[}5.2-17.4]; P < 0.001) and controls (11.5 {[}8.0-16.7]; P <= 0.001). Lymphocyte counts were comparable in RA groups (P > 0.05), but RA-ABA patients had slightly lower gammaglobulin levels than RA-MTX patients (0.9 gm/dl {[}0.6-1.8] versus 1.2 gm/dl {[}0.8-1.7]; P = 0.03), although almost all were within the normal range values. Conclusion. The current study established that ABA, in association with traditional DMARDs, significantly reduces the humoral response to pandemic 2009 influenza A/H1N1 vaccine in RA patients. The results suggest an influence of costimulatory modulation in humoral response to this vaccine. (AU)

Processo FAPESP: 10/10749-0 - Vacina anti-influenza H1N1/2009 em pacientes com doenças reumáticas autoimunes
Beneficiário:Eloisa Silva Dutra de Oliveira Bonfá
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 09/51897-5 - Terapia anti-TNF em doenças auto-imunes reumatológicas: abordagem de aspectos peculiares
Beneficiário:Eloisa Silva Dutra de Oliveira Bonfá
Linha de fomento: Auxílio à Pesquisa - Temático