Balance of IL-10 and Interferon-γ plasma levels in human visceral leishmaniasis: implications in the pathogenesis

dc.creatorCaldas, Arlene de Jesus Mendes
dc.creatorFavali, Cecilia Beatriz Fiuza
dc.creatorAquino, Dorlene Maria Cardoso de
dc.creatorVinhas, Vera
dc.creatorWeyenbergh, Johan van
dc.creatorBrodskyn, Claudia Ida
dc.creatorCosta, Jackson Mauricio Lopes
dc.creatorBarral Netto, Manoel
dc.creatorBarral, Aldina Maria Prado
dc.date2011-07-06T18:47:08Z
dc.date2011-07-06T18:47:08Z
dc.date2005
dc.date.accessioned2023-09-26T21:11:51Z
dc.date.available2023-09-26T21:11:51Z
dc.identifierCALDAS, A. et al. Balance of IL-10 and Interferon-γ plasma levels in human visceral leishmaniasis: implications in the pathogenesis. BMC Infectious Diseases, v.5, n.113, 2005.
dc.identifier1471-2334
dc.identifierhttps://www.arca.fiocruz.br/handle/icict/2749
dc.identifier10.1186/1471-2334-5-113
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8870674
dc.descriptionBackground: Leishmaniasis remains a serious public health problem in several parts of the developing world. Effective prophylactic measurements are hampered by imprecise comprehension of different aspects of the disease, including its immunoregulation. A better comprehension of immunoregulation in human VL may be useful both for designing and evaluating immunoprophylaxis. Methods: To explore immunoregulatory mechanisms, 20 visceral leishmaniasis (VL) patients were evaluated during active disease and at different periods up to one year after treatment determining their plasma cytokine levels, clinical parameters (palpable spleen and liver) and antibody levels. Results: Elevated plasma levels of IFN-γ and of IL-12 p40 were observed during active disease, significantly decreasing after treatment whereas in vitro Leishmania antigen-stimulated IFN-γ production by PBMC exhibited an inverse pattern being low during disease and increasing steadily thereafter. Absence of IFN-γ activity is a hallmark of VL. The main candidate for blunting IFN-γ activity is IL-10, a cytokine highly elevated in plasma with sharp decrease after treatment. Activity of IL-10 is inferred by high levels of anti-Leishmania specific IgG1 and IgG3. TGF-β had elevated total, but not of active, levels lessening the likelihood of being the IFN-γ counterpart. Spleen or liver size presented a steady decrease but return to normal values at only 120 days after treatment. Anti- Leishmania IgG (total and subclasses) levels and DTH or Leishmania-stimulated lymphocyte proliferation conversion to positive also present a slow decrease after treatment. IL-6 plasma levels were elevated in only a few patients. Conclusion: Taken together our results suggest that IFN-γ and IL-10 are the molecules most likely involved in determining fate of disease. After treatment, there is a long delay before the immune profile returns to normal what precludes using plasma cytokine levels as criteria of cure as simpler clinical evaluations, as a palpable spleen or liver, can be used.
dc.formatapplication/pdf
dc.languageeng
dc.rightsopen access
dc.subjectLeishmaniose Visceral Humana
dc.subjectImunorregulação
dc.subjectImunoprofilaxia
dc.subjectInterferon-y
dc.subjectHuman Visceral Leishmaniasis
dc.subjectImmunoregulation
dc.subjectImmunoprophylaxis
dc.subjectInterferon-y
dc.subjectLeishmaniose Visceral
dc.subjectInterferon gama
dc.titleBalance of IL-10 and Interferon-γ plasma levels in human visceral leishmaniasis: implications in the pathogenesis
dc.typeArticle


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