Immunomodulation of Chiclero's Ulcer. Role of Eosinophils, T Cells, Tumour Necrosis Factor and Interleukin‐2

The progression of cutaneous leishmaniasis is controlled largely by cell‐mediated immunity. Two subpopulations of CD4+ T cells exist that control healing or immunopathology of murine and, perhaps, human leishmaniasis. To better understand the immunological pathways controlling outcome of the human d...

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Published in:Scandinavian journal of immunology 1998-05, Vol.47 (5), p.502-508
Main Authors: Lezama‐Dávila, Isaac‐Márquez, Padierna‐Olivos, Aguilar‐Torrentera, Chapa‐Ruiz
Format: Article
Language:English
Subjects:
Adolescent
Adult
Aged
Aged, 80 and over
Child
Cytokines - blood
Eosinophils - physiology
Female
Flow Cytometry
Humans
Interleukin-2 - physiology
Leishmaniasis, Cutaneous - blood
Leishmaniasis, Cutaneous - diagnosis
Leishmaniasis, Cutaneous - immunology
Leukocyte Count
Lymphocyte Subsets - cytology
Male
Middle Aged
T-Lymphocytes - physiology
Tumor Necrosis Factor-alpha - physiology
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Summary:The progression of cutaneous leishmaniasis is controlled largely by cell‐mediated immunity. Two subpopulations of CD4+ T cells exist that control healing or immunopathology of murine and, perhaps, human leishmaniasis. To better understand the immunological pathways controlling outcome of the human disease, we analysed the pattern of tumour necrosis factor (TNF) and interleukin‐2 (IL‐2), both of which were present in the sera of humans with active or healed chiclero's ulcer, in relation to the development of delayed‐type hypersensitivity (DTH) responses and leucocyte counts in peripheral blood. Increased serum levels of IL‐2 and TNF‐α were apparent only in individuals with active lesions. All individuals with localized cutaneous leishmaniasis developed a strong DTH. The number of T cells was lower in the blood of diseased individuals and the CD4/CD8 ratio was reduced (from 1.5 to 1.0) when compared with the control group. However, diseased and recently cured individuals developed eosinophilia. We conclude that important alterations of the immune response exists in humans suffering from this normally self‐healing infection.
ISSN:0300-9475
1365-3083
DOI:10.1046/j.1365-3083.1998.00328.x