Antiphospholipid antibodies in Brazilian hepatitis C virus carriers
Braz. j. med. biol. res
;
41(6): 489-492, June 2008. graf
Artículo
en Inglés
| LILACS
| ID: lil-485853
ABSTRACT
Hepatitis C, a worldwide viral infection, is an important health problem in Brazil. The virus causes chronic infection, provoking B lymphocyte dysfunction, as represented by cryoglobulinemia, non-organ-specific autoantibody production, and non-Hodgkin's lymphoma. The aim of this research was to screen for the presence of antiphospholipid autoantibodies in 109 Brazilian hepatitis C virus carriers without clinical history of antiphospholipid syndrome. Forty healthy individuals were used as the control group. IgA, IgG, and IgM antibodies against cardiolipin and ß2-glycoprotein I were measured with an enzyme-linked immunosorbent assay, using a cut-off point of either 20 UPL or 20 SBU. While 24 (22.0 percent) hepatitis C carriers had moderate titers of IgM anticardiolipin antibodies (median, 22.5 MPL; 95 percentCI 21.5-25.4 MPL), only three carriers (<3 percent) had IgG anticardiolipin antibodies (median, 23 GPL; 95 percentCI 20.5-25.5 GPL). Furthermore, IgA anticardiolipin antibodies were not detected in these individuals. Male gender and IgM anticardiolipin seropositivity were associated in the hepatitis C group (P = 0.0004). IgA anti-ß2-glycoprotein-I antibodies were detected in 29 of 109 (27.0 percent) hepatitis C carriers (median, 41 SAU; 95 percentCI 52.7-103.9 SAU). Twenty patients (18.0 percent) had IgM anti-ß2-glycoprotein I antibodies (median, 27.6 SMU; 95 percentCI 23.3-70.3 SMU), while two patients had IgG antibodies against this protein (titers, 33 and 78 SGU). Antiphospholipid antibodies were detected in only one healthy individual, who was seropositive for IgM anticardiolipin. We concluded that Brazilian individuals chronically infected with hepatitis C virus present a significant production of antiphospholipid antibodies, mainly IgA anti-ß2-glycoprotein I antibodies, which are not associated with clinical manifestations of antiphospholipid syndrome.
Texto completo:
Disponible
Índice:
LILACS (Américas)
Asunto principal:
Isotipos de Inmunoglobulinas
/
Anticuerpos Anticardiolipina
/
Hepatitis C Crónica
Tipo de estudio:
Estudio observacional
/
Factores de riesgo
Límite:
Adolescente
/
Adulto
/
Anciano
/
Aged80
/
Femenino
/
Humanos
/
Masculino
País/Región como asunto:
America del Sur
/
Brasil
Idioma:
Inglés
Revista:
Braz. j. med. biol. res
Asunto de la revista:
Biologia
/
Medicina
Año:
2008
Tipo del documento:
Artículo
/
Documento de proyecto
País de afiliación:
Brasil
Institución/País de afiliación:
Universidade Federal da Bahia/BR
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