Abstracts
This study was undertaken to investigate the presence of autoantibodies in patients with chronic viral hepatitis B and C, before, during and after interferon-alpha (IFN-alpha) therapy and to study their relation to dose and type of IFN-alpha and response to treatment. Fifty patients with chronic hepatitis were divided in two groups, a control-group of 21 patients (10 type B and 11 type C) who were followed for 6 months without treatment and an IFN-group consisting of 29 patients (8 type B and 21 type C) who received IFN therapy for 6 months. Serum samples were tested for a range of antibodies at the start of the study, during therapy and at the end of the 6 month period. Antibodies tested for included: antinuclear, smooth muscle, antimitochondrial, parietal cell and thyroid microsomal. Four (8%) of the total patient group had autoantibodies at the beginning of the study (two in each group). During the follow-up period no patient in the control group developed antibodies compared with 3 (11%) patients in the treatment group. Autoantibodies developed in patients treated with higher doses of IFN and were found in those patients who tended to show a poor response to IFN-therapy. Further studies are needed to establish the relationship between poor response to IFN-alpha and development of autoantibodies.
Viral hepatitis; Autoantibodies; Interferon-alpha
Este estudo teve como objetivo avaliar a presença de auto-anticorpos em pacientes com hepatite crônica pelos vírus B e C, antes, durante e após tratamento com interferon-alfa (IFN-alfa), assim como estudar a relação destes anticorpos com o tipo de IFN, com a dose e com a resposta terapêutica. Cinqüenta pacientes com hepatite viral crônica foram divididos em 2 grupos: grupo-controle constituído por 21 pacientes (10 hepatites B e 11 hepatites C), que foram seguidos durante 6 meses sem tratamento e grupo-IFN constituído por 29 pacientes (8 hepatites B e 21 hepatites C), que receberam IFN-alfa durante 6 meses. Anticorpos antinúcleo, antimúsculo liso, antimitocôndria, anticélula parietal e antitireóide foram pesquisados em amostras de soro colhidas antes do início, durante e ao final do estudo. Quatro dos 50 pacientes (8%) apresentavam auto-anticorpos no início do estudo (2 em cada grupo). Durante o estudo nenhum paciente do grupo-controle desenvolveu auto-anticorpos, enquanto que 3 (11%) pacientes do grupo-IFN passaram a apresentá-los. Os auto-anticorpos ocorreram apenas em pacientes tratados com doses mais elevadas de IFN. Verificou-se ainda tendência à resposta desfavorável ao tratamento naqueles indivíduos que apresentaram ou desenvolveram auto-anticorpos. Assim, sugere-se que mais estudos sejam realizados para determinar se existe ou não relação entre resposta desfavorável e a presença ou o desenvolvimento de auto-anticorpos.
CLINICAL AND LABORATORIAL STUDIES
Autoantibodies before, during and after administration of recombinant interferon-a for chronic viral hepatitis
Estudo dos auto-anticorpos nas Hepatites virais crônicas B e C antes, durante e após tratamento com Interferon-a
Edmundo P.A. LopesI; A. Eduardo SilvaI; Hoel Sette JuniorII; Rubens X. GuimarãesI; M. Lucia FerrazI
IDisciplina de Gastroenterologia, Escola Paulista de Medicina, São Paulo, S.P., Brasil
IIHospital Oswaldo Cruz, São Paulo, SP, Brasil
Correspondence to Correspondence to: M. Lucia Ferraz, M.D. Rua Machado Bittencourt, 413/81 04043-002 São Paulo, SP, Brasil Fax: 55-11-572-5945
SUMMARY
This study was undertaken to investigate the presence of autoantibodies in patients with chronic viral hepatitis B and C, before, during and after interferon-a (IFN-a) therapy and to study their relation to dose and type of IFN-a and response to treatment. Fifty patients with chronic hepatitis were divided in two groups, a control-group of 21 patients (10 type B and 11 type C) who were followed for 6 months without treatment and an IFN-group consisting of 29 patients (8 type B and 21 type C) who received IFN therapy for 6 months. Serum samples were tested for a range of antibodies at the start of the study, during therapy and at the end of the 6 month period. Antibodies tested for included: antinuclear, smooth muscle, antimitochondrial, parietal cell and thyroid microsomal. Four (8%) of the total patient group had autoantibodies at the beginning of the study (two in each group). During the follow-up period no patient in the control group developed antibodies compared with 3 (11%) patients in the treatment group. Autoantibodies developed in patients treated with higher doses of IFN and were found in those patients who tended to show a poor response to IFN-therapy. Further studies are needed to establish the relationship between poor response to IFN-a and development of autoantibodies.
Keywords: Viral hepatitis; Autoantibodies; Interferon-a
RESUMO
Este estudo teve como objetivo avaliar a presença de auto-anticorpos em pacientes com hepatite crônica pelos vírus B e C, antes, durante e após tratamento com interferon-a (IFN-a), assim como estudar a relação destes anticorpos com o tipo de IFN, com a dose e com a resposta terapêutica. Cinqüenta pacientes com hepatite viral crônica foram divididos em 2 grupos: grupo-controle constituído por 21 pacientes (10 hepatites B e 11 hepatites C), que foram seguidos durante 6 meses sem tratamento e grupo-IFN constituído por 29 pacientes (8 hepatites B e 21 hepatites C), que receberam IFN-a durante 6 meses. Anticorpos antinúcleo, antimúsculo liso, antimitocôndria, anticélula parietal e antitireóide foram pesquisados em amostras de soro colhidas antes do início, durante e ao final do estudo. Quatro dos 50 pacientes (8%) apresentavam auto-anticorpos no início do estudo (2 em cada grupo). Durante o estudo nenhum paciente do grupo-controle desenvolveu auto-anticorpos, enquanto que 3 (11%) pacientes do grupo-IFN passaram a apresentá-los. Os auto-anticorpos ocorreram apenas em pacientes tratados com doses mais elevadas de IFN. Verificou-se ainda tendência à resposta desfavorável ao tratamento naqueles indivíduos que apresentaram ou desenvolveram auto-anticorpos. Assim, sugere-se que mais estudos sejam realizados para determinar se existe ou não relação entre resposta desfavorável e a presença ou o desenvolvimento de auto-anticorpos.
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Recebido para publicação em 24/01/1995
Aceito para publicação em 16/10/1995
References
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Publication Dates
-
Publication in this collection
21 Sept 2006 -
Date of issue
Oct 1995
History
-
Accepted
16 Oct 1995 -
Received
24 Jan 1995