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In vivo Imaging of Transgenic Leishmania Parasites in a Live Host
Published on: July 27, 2010
Atypical cutaneous leishmaniasis cases display elevated antigen-induced interleukin-10
B Rodriguez1, R Beatty, A Belli
1Departamento de Parasitología, Centro Nacional de Diagnóstico y Referencia, Ministerio de Salud, Managua, Nicaragua.
Parasite Immunology
|May 24, 2007
Summary
Atypical cutaneous leishmaniasis (ACL) involves a robust IL-10 immune response. This study found that active ACL cases show suppressed cytokine production, suggesting partial immunosuppression in Leishmania infections.
Area of Science:
- Immunology
- Parasitology
- Infectious Diseases
Background:
- Leishmania chagasi causes subclinical, atypical cutaneous leishmaniasis (ACL), and potentially fatal visceral leishmaniasis.
- Genetic similarity of L. chagasi strains suggests host immune response dictates infection outcome.
- Understanding the immunologic profile in ACL is crucial for disease management.
Purpose of the Study:
- To characterize the immunologic response in atypical cutaneous leishmaniasis (ACL).
- To investigate cytokine production (IL-10, IFN-gamma, IL-2) and serum IgE levels in ACL patients.
- To compare immune responses between active ACL, asymptomatic cases, and healthy controls.
Main Methods:
- Peripheral blood mononuclear cells (PBMCs) from 37 subjects (active ACL, asymptomatic, controls) were stimulated.
- Cytokine production (IL-10, IFN-gamma, IL-2) in PBMC supernatants was analyzed.
- Serum IgE levels were measured using ELISA; mitogen-induced cytokine responses were assessed.
Main Results:
- Active ACL cases exhibited robust IL-10 production upon Leishmania stimulation.
- Asymptomatic cases and controls showed significantly lower IL-10 levels.
- ACL cases displayed diminished cytokine responses to mitogen, indicating partial immunosuppression.
Conclusions:
- The immune response in ACL is characterized by high IL-10 production.
- Partial immunosuppression is associated with active atypical cutaneous leishmaniasis.
- IL-10 may play a significant role in the immunopathogenesis of ACL.
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