The lymphocytes from eight patients with active visceral leishmaniasis (VL), a disease associated with marked immunologic dysfunction, were examined for ability to produce interleukin 2 (IL-2) and gamma interferon during in vitro cultivation. It was found that both IL-2 and gamma interferon production, in response to leishmania antigen, was absent during the active disease, but was restored after successful chemotherapy. Untreated VL patients produced IL-2 and gamma interferon when stimulated with phytohemagglutinin (PHA). Six patients with either active cutaneous or mucosal leishmaniasis, a disease not associated with immunosuppression, showed high levels of gamma interferon in response to leishmania antigen and PHA. Since IL-2 and gamma interferon have been shown to have important roles in the immune response and in the killing of leishmania, their absence may represent a key defect in the immune response in VL.
E M Carvalho, R Badaró, S G Reed, T C Jones, W D Johnson Jr
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Estudo comparativo de anticorpos IgG e IgE antileishmania como marcadores de infecção e doença em indivíduos de área endêmica de leishmaniose visceral, em São Luis, MA
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Inhibition of IL-2 Induced IL-10 Production as a Principle of Phase-Specific Immunotherapy
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Journal of immunology (Baltimore, Md. : 1950) | 2006 |
Identification of a novel G245R polymorphism in the IL-2 receptor beta membrane proximal domain associated with human visceral leishmaniasis.
Bucheton B, Argiro L, Chevillard C, Marquet S, Kheir MM, Mergani A, El-Safi SH, Dessein AJ |
Genes and immunity | 2006 |