Résumé
Parvovirus B19 has been associated by some investigators with cases of severe hepatitis. The aim of the present study was to determine the presence of active parvovirus B19 infection among 129 Brazilian patients with non-A-E hepatitis. The patients were assayed for antibodies against parvovirus B19, IgM class, by ELISA. In IgM-positive cases, parvovirus B19 DNA was assayed by PCR in serum and liver tissue and parvovirus VP1 antigen in liver tissue was assayed by immunohistochemistry. Antibodies against parvovirus B19, IgM class, were detected in 3 (2.3 percent) of 129 patients with non-A-E hepatitis. Previous surgery and blood transfusions were reported by these 3 patients. One patient was a 56-year-old female with severe hepatitis, with antimitochondrial antibody seropositivity and submassive necrosis at liver biopsy, who responded to corticosteroid therapy. Strong evidence for active parvovirus B19 infection was found in this patient, with parvovirus B19 DNA being detected by PCR in liver tissue. Furthermore, parvovirus VP1 antigen was also detected in liver tissue by immunohistochemistry. The other two IgM-positive patients were chronic hepatitis cases, but active infection was not proven, since neither viral DNA nor antigen were detected in their liver tissues. This and other reports suggest a possible relation between parvovirus B19 infection and some cases of hepatitis
Sujets)
Humains , Mâle , Femelle , Adulte d'âge moyen , Hépatites virales humaines/virologie , Parvovirus humain B19/isolement et purification , Maladie aigüe , Anticorps antiviraux/isolement et purification , Antigènes viraux/isolement et purification , Maladie chronique , ADN viral/isolement et purification , Électrophorèse sur gel d'agar , Test ELISA , Immunoglobuline M/isolement et purification , Foie/anatomopathologie , Foie/virologie , Parvovirus humain B19/immunologie , Réaction de polymérisation en chaîneRésumé
A resposta ao tratamento com interferon em pacientes com hepatite cronica NANB/C tem sido classificada como completa, parcial ou ausente, de acordo com o comportamento da alanino aminotransferase serica (ALT). Entretanto, uma observacao mais detalhada da atividade enzimatica tem mostrado que os padroes da resposta da ALT em pacientes com hepatite cronica NANB/C tratados com interferon alfa recombinante...
Sujets)
Humains , Adulte , Hépatite C/thérapie , Interféron de type I/usage thérapeutique , Études de suiviRésumé
A deteccao do DNA do Virus da Hepatite B pela Reacao em cadeia Polimerase (PCR) foi comparada com os outros marcadores sorologicos virais (AgHBs, AgHBe e anti-HBe) numa serie de 49 pacientes com hepatite cronica B, incluindo 12 que apresentaram clareamento espontaneo do AgHBs. Nenhum caso AgHBs negativo foi PCR positivo, mas 33/37 (89,2 por cento) dos casos AgHBs positivos foram PCR positivos (p<0,0001). Entre as amostras AgHBs positivas, 9 foram AgHBe positivas e anti-HBe negativas, todas elas PCR positivas....