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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.)

Pandemic influenza immunization in primary antiphospholipid syndrome (PAPS): a trigger to thrombosis and autoantibody production?

Texto completo
de Medeiros, D. Martins [1] ; Silva, C. A. [1, 2] ; Bueno, C. [1] ; Medeiros Ribeiro, A. C. [1] ; Viana, V. dos Santos T. [1] ; Carvalho, J. Freire [3] ; Bonfa, E. [1]
Número total de Autores: 7
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Fac Med, Div Rheumatol, BR-05403010 Sao Paulo - Brazil
[2] Univ Sao Paulo, Fac Med, Pediat Rheumatol Unit, BR-05403010 Sao Paulo - Brazil
[3] Univ Fed Bahia, Div Rheumatol, BR-41170290 Salvador, BA - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: Lupus; v. 23, n. 13, p. 1412-1416, NOV 2014.
Citações Web of Science: 4

Objective The objective of this report is to conduct short- and long-term evaluation of a large panel of antiphospholipid (aPL) autoantibodies following pandemic influenza A/H1N1 non-adjuvant vaccine in primary antiphospholipid syndrome (PAPS) patients and healthy controls. Methods Forty-five PAPS and 33 healthy controls were immunized with H1N1 vaccine. They were prospectively assessed at pre-vaccination, and three weeks and six months after vaccination. aPL autoantibodies were determined by an enzyme-linked immunosorbent assay (ELISA) and included IgG/IgM: anticardiolipin (aCL), anti-beta2glycoprotein I (anti-2GPI); anti-annexin V, anti-phosphatidyl serine and anti-prothrombin antibodies. Anti-Sm was determined by ELISA and anti-double-stranded DNA (anti-dsDNA) by indirect immunofluorescence. Arterial and venous thrombosis were also clinically assessed. Results Pre-vaccination frequency of at least one aPL antibody was significantly higher in PAPS patients versus controls (58% vs. 24%, p=0.0052). The overall frequencies of aPL antibody at pre-vaccination, and three weeks and six months after immunization remained unchanged in patients (p=0.89) and controls (p=0.83). The frequency of each antibody specificity for patients and controls remained stable in the three evaluated periods (p>0.05). At three weeks, two PAPS patients developed a new but transient aPL antibody (aCL IgG and IgM), whereas at six months new aPL antibodies were observed in six PAPS patients and none had high titer. Anti-Sm and anti-dsDNA autoantibodies were uniformly negative and no new arterial or venous thrombosis were observed throughout the study. Conclusions This is the first study to demonstrate that pandemic influenza vaccine in PAPS patients does not trigger short- and long-term thrombosis or a significant production of aPL-related antibodies (ClinicalTrials.gov, \#NCT01151644). (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