48 resultados para CD4 CD8 ratio
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Pós-graduação em Zootecnia - FMVZ
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Pós-graduação em Medicina Veterinária - FCAV
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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OBJETIVO: Avaliar os resultados do teste tuberculínico e relacioná-los com a presença ou não de tuberculose em atividade e com a contagem de linfócitos T CD4+/CD8+. MÉTODOS: Foram revisados 802 prontuários de pacientes com síndrome da imunodeficiência adquirida atendidos no período de agosto de 1985 a março de 2003. Cento e oitenta e cinco pacientes realizaram o teste tuberculínico (23,1%) e, destes, 107 eram do sexo masculino (57,8%). A média de idade no grupo de reatores ao teste tuberculínico foi de 30,6 anos, com desvio-padrão de 6,62 anos, e entre os não reatores de 34,45 anos com desvio-padrão de 10,32 anos. Foram constituídos dois grupos de estudo: reatores ao teste tuberculínico, com 28 pacientes, e não reatores ao teste tuberculínico, com 157 pacientes. RESULTADOS: Grande parte dos indivíduos foi pouco responsiva ao teste tuberculínico. Constatou-se, no grupo de reatores, maior porcentagem de indivíduos com tuberculose ativa à época da realização do teste, quando se comparou com os não reatores. Dez pacientes entre os reatores e onze entre os não reatores apresentavam alguma forma clínica de tuberculose em atividade à época da realização do teste, sendo que seis do primeiro grupo e oito do segundo tinham contagem de linfócitos T CD4+ menor que 200 células/mm³. CONCLUSÃO: Indurações maiores do que 5 mm não se relacionaram com contagens absolutas mais altas de células T CD4+.
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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The study of the in-situ cellular immune response is very important for the understanding of different liver infections. In the present study, 53 liver samples obtained by viscerotomy from patients who died during the course of jungle yellow fever were analyzed. The diagnosis was confirmed by serology, viral isolation and virus-specific immunohistochemistry. The specimens were analyzed by immunohistochemistry using specific antibodies for apoptosis, CD45RO, CD4, CD8, CD20, S100, CD57 and CD68. Quantitative analysis of the labeling pattern showed a clear predominance of the different phenotypes in the portal tract and midzone region of the acini. There was a predominance of T CD4+ lymphocytes, accompanied by the presence of T CD8+ lymphocytes, natural killer cells (CD57), macrophages and antigen-presenting cells (S100). The disproportion between the intensity of inflammation and the degree of hepatic injury was probably due to the intense apoptotic component, which classically does not induce an inflammatory response. The present study demonstrates that, despite the disproportion between injury and inflammation, the cellular immune response plays an important role in the pathogenesis of the hepatocytic injury observed in yellow fever, probably as a result of cytolytic actions through mechanisms involving MHC II and the activation of Fas receptors and granzymes/perforins. (C) 2006 Royal Society of Tropical Medicine and Hygiene. Published by Elsevier Ltd. All rights reserved.
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Highly active antiretroviral therapy (HAART) has lead to a dramatic decrease in the morbidity of patients infected with HIV. However, metabolic side effects, including lipodystrophy and dyslipidemia, have been reported in patients treated with antiretroviral therapy (HAART). The aim of this study was to analyze the clinical and metabolic alterations and the cytokines TNF-α, IFN-γ, IL-2, IL-10 and TNF-II receptors profile in the serum of treated HIV-1-infected individuals with or without lipodystrophy. Eighty-four adult patients were analyzed, 42 females and 42 males, their mean age was 37 years old, and they received HAART for at least 15 months. These patients were ambulatory outpatients from the Infectious and Parasitary Disease Area of Botucatu School of Medicine, UNESP. Subsequently the individuals were distributed into 2 groups, G1: 42 HIV-infected individuals with lipodystrophy, and G2: 42 HIV-infected individuals without lipodystrophy. Among the antiretrovirals used, stavudine was more associated to the lipodystrophy group and zidovudine to the group without lipodystrophy. CD4, CD8, viral load, glucose, albumin, and the circulating lipid did not present any difference in the group comparison, except for triglyceride that was elevated in the lipodystrophy group and HDL which was present in low concentration in more patients of G1. The cytokines TNF-α, TNF-RII, and IL-10 profile presented high levels in the lipodystrophy group; also it was positively correlated with this group. On the other hand, IL-2 and IFN-γ presented low levels in this group. High levels of TNF-α and its receptor seem to be associated to the development of lipodystrophy in patients receiving HAART.
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Pós-graduação em Ginecologia, Obstetrícia e Mastologia - FMB
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)