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Killer cells in human cutaneous leishmaniasis.

P R Ridel1, P Esterre, J P Dedet

  • 1Laboratoire d'Immunologie, Institut Pasteur de la Guyane Française, Cayenne, France.

Transactions of the Royal Society of Tropical Medicine and Hygiene
|January 1, 1988
PubMed
Summary

American cutaneous leishmaniasis in French Guiana causes localized skin lesions. The immune system, particularly K/NK cells, appears to control parasite spread, though lesions may persist.

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Area of Science:

  • Immunology
  • Parasitology
  • Dermatology

Background:

  • American cutaneous leishmaniasis presents as localized skin infections in French Guiana.
  • The host immune response effectively limits parasite dissemination but does not prevent chronic lesions.

Purpose of the Study:

  • To investigate the local immune cell populations involved in the host response to cutaneous leishmaniasis in French Guiana.
  • To elucidate the role of specific immune cells in controlling parasite load and lesion duration.

Main Methods:

  • Skin biopsies from patients with cutaneous leishmaniasis were analyzed.
  • Immunoperoxidase techniques and monoclonal antibodies were used to identify cell phenotypes (K/NK, T cells with TAC receptors, monocytes, B cells).

Main Results:

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  • A high proportion of K/NK cells and T cells bearing TAC receptors were observed in skin lesions.
  • Monocytes and B cells were present in moderate numbers.
  • The findings indicate a significant presence of cytotoxic and T cell populations at the lesion site.

Conclusions:

  • K/NK cells may play a crucial role in the local immune control of American cutaneous leishmaniasis.
  • The persistent lesions suggest that while K/NK cells contribute to parasite control, the immune response is not fully curative.