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CD36(+)-dendritic epidermal cells: a putative actor in the cutaneous immune system

M Rouabhia1, N Jobin, R Doucet

  • 1Laboratoire de Recherche des Grands Brûlés/LOEX, Hôpital du Saint-Sacrement, Québec, Canada.

Cell Transplantation
|November 1, 1994
PubMed

Insights

CD36(+)-dendritic epidermal cells (DECs) are found in the epidermis and stimulate lymphocyte proliferation. These cells may play a role in skin immunity and allograft rejection.

Area of Science:

  • Immunology
  • Dermatology
  • Cell Biology

Background:

  • Dendritic epidermal cells (DECs) are crucial immune cells in the skin.
  • CD36 is a cell surface receptor expressed on various immune cells.
  • Understanding DEC subsets is vital for skin immunology research.

Purpose of the Study:

  • To investigate the localization, distribution, percentage, and immunological function of CD36(+)-dendritic epidermal cells (CD36(+)-DECs) in normal human skin.
  • To determine the role of CD36(+)-DECs in stimulating lymphocyte responses.
  • To assess the contribution of CD36(+)-DECs to skin immunity and allograft recognition.

Main Methods:

  • Indirect immunofluorescence staining was used to identify and localize CD36(+)-DECs in human skin sections and isolated cells.
  • Allogeneic mixed epidermal cell-lymphocyte reaction (ELR) was performed using peripheral blood mononuclear cells (PBMCs) and CD36(+)-DECs.
  • Cell proliferation was measured in response to CD36(+)-DECs, with and without Langerhans cells (LCs) and concanavalin A (ConA).

Main Results:

  • CD36(+)-DECs were identified in the epidermis, primarily in the basal layer, constituting approximately 2% of epidermal cells.
  • These cells were found to be non-adherent and AE3 positive, indicating keratinocyte expression.
  • CD36(+)-DECs significantly stimulated allogeneic lymphocyte proliferation, with enhanced effects observed when combined with LCs and ConA.

Conclusions:

  • CD36(+)-DECs are present in normal human skin and possess immune-stimulatory properties.
  • These cells contribute to the immunological surveillance of the skin.
  • CD36(+)-DECs may be involved in the recognition and rejection of cutaneous allografts.
Abstract

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