Adhesion molecules CD11a, CD18, and ICAM-1 on human epidermal langerhans cells serve a functional role in the activation of alloreactive T cells

Jan C. Simon, Ponciano D Cruz, Robert E. Tigelaar, Richard D. Sontheimer, Paul R. Bergstresser

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Abstract

Binding of antigen-presenting cells (APC) to T cells via adhesion molecules is thought to deliver accessory signals that are required for efficient T-cell activation. To determine whether Langerhans cells (LC) express relevant adhesion molecules on their surfaces, we employed two-color immunofluorescence. Human epidermal cells (EC), Ficollenriched for LC (> 10%), were incubated with monoclonal antibodies (MoAb) specific for the adhesion molecules CD11a (LFA-1α), CD18 (LFA-1β), or ICAM-1; staining was evaluated by fluorescence microscopy. After 12 h of culture only HLA-DR+cells (LC) expressed CD11a, CD18, and ICAM-1. As a test for the functional relevance of such adhesion molecule expression, we examined the capacity of the above MoAb to block LC stimulation of alloreactive T cells: EC were co-cultured with allogeneic peripheral blood mononuclear leukocytes (PBML) for 5 d in the presence or absence of MoAb; proliferation was measured by [3H]- thymidine uptake. MoAb against CD11a, CD18, or ICAM-1 reduced the allostimulatory capacity of LC by > 70%; combinations of these MoAb reduced proliferation even more (90%). We conclude that interaction of adhesion molecules on LC with ligands on T cells is required for optimal allo antigen dependent T-cell activation, perhaps by delivering accessory signals.

Original languageEnglish (US)
Pages (from-to)148-151
Number of pages4
JournalJournal of Investigative Dermatology
Volume96
Issue number1
StatePublished - Jan 1991

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T-cells
Langerhans Cells
Intercellular Adhesion Molecule-1
Adhesion
Chemical activation
Monoclonal Antibodies
T-Lymphocytes
Molecules
Lymphocyte Function-Associated Antigen-1
Accessories
CD27 Antigens
Fluorescence microscopy
Mononuclear Leukocytes
HLA-DR Antigens
Thymidine
Cell Adhesion Molecules
Antigen-Presenting Cells
Fluorescence Microscopy
Blood
Fluorescent Antibody Technique

ASJC Scopus subject areas

  • Dermatology

Cite this

Adhesion molecules CD11a, CD18, and ICAM-1 on human epidermal langerhans cells serve a functional role in the activation of alloreactive T cells. / Simon, Jan C.; Cruz, Ponciano D; Tigelaar, Robert E.; Sontheimer, Richard D.; Bergstresser, Paul R.

In: Journal of Investigative Dermatology, Vol. 96, No. 1, 01.1991, p. 148-151.

Research output: Contribution to journalArticle

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abstract = "Binding of antigen-presenting cells (APC) to T cells via adhesion molecules is thought to deliver accessory signals that are required for efficient T-cell activation. To determine whether Langerhans cells (LC) express relevant adhesion molecules on their surfaces, we employed two-color immunofluorescence. Human epidermal cells (EC), Ficollenriched for LC (> 10{\%}), were incubated with monoclonal antibodies (MoAb) specific for the adhesion molecules CD11a (LFA-1α), CD18 (LFA-1β), or ICAM-1; staining was evaluated by fluorescence microscopy. After 12 h of culture only HLA-DR+cells (LC) expressed CD11a, CD18, and ICAM-1. As a test for the functional relevance of such adhesion molecule expression, we examined the capacity of the above MoAb to block LC stimulation of alloreactive T cells: EC were co-cultured with allogeneic peripheral blood mononuclear leukocytes (PBML) for 5 d in the presence or absence of MoAb; proliferation was measured by [3H]- thymidine uptake. MoAb against CD11a, CD18, or ICAM-1 reduced the allostimulatory capacity of LC by > 70{\%}; combinations of these MoAb reduced proliferation even more (90{\%}). We conclude that interaction of adhesion molecules on LC with ligands on T cells is required for optimal allo antigen dependent T-cell activation, perhaps by delivering accessory signals.",
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AB - Binding of antigen-presenting cells (APC) to T cells via adhesion molecules is thought to deliver accessory signals that are required for efficient T-cell activation. To determine whether Langerhans cells (LC) express relevant adhesion molecules on their surfaces, we employed two-color immunofluorescence. Human epidermal cells (EC), Ficollenriched for LC (> 10%), were incubated with monoclonal antibodies (MoAb) specific for the adhesion molecules CD11a (LFA-1α), CD18 (LFA-1β), or ICAM-1; staining was evaluated by fluorescence microscopy. After 12 h of culture only HLA-DR+cells (LC) expressed CD11a, CD18, and ICAM-1. As a test for the functional relevance of such adhesion molecule expression, we examined the capacity of the above MoAb to block LC stimulation of alloreactive T cells: EC were co-cultured with allogeneic peripheral blood mononuclear leukocytes (PBML) for 5 d in the presence or absence of MoAb; proliferation was measured by [3H]- thymidine uptake. MoAb against CD11a, CD18, or ICAM-1 reduced the allostimulatory capacity of LC by > 70%; combinations of these MoAb reduced proliferation even more (90%). We conclude that interaction of adhesion molecules on LC with ligands on T cells is required for optimal allo antigen dependent T-cell activation, perhaps by delivering accessory signals.

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