HUT 78 T cells bind to noncytokine-stimulated keratinocytes using a non- CD18-dependent adhesion pathway

B. J. Nickoloff, R. S. Mitra, Y. Shimizu, J. N W N Barker, G. Karabin, T. Stoof, L. M. Stoolman

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

The initial in vitro observation that cultured keratinocytes, when treated with cytokines such as gamma interferon, increased the binding of T lymphocytes, opened up a whole new avenue of research to understand epidermal trafficking patterns in inflammatory skin diseases. A growing body of data strongly supports the in vivo role of lymphocyte-function-associated antigen- 1 (CD18) expression by T cells in the binding to intercellular adhesion molecule-1 (CD54) expressing keratinocytes. To further explore the molecular basis for other possible adhesive interactions involving T cells and skin- derived cellular constituents, the authors used 2 cell lines (HUT 78 cells and Jurkat cells) and added them to multipassaged human keratinocytes, fibroblasts, and melanocytes. The skin-derived cells were treated with cytokines alone, or in combination, with a phorbol ester. HUT cells were capable of binding to keratinocytes in the absence of pretreatment with cytokines at 25°C, which was not inhibited by anti-CD18 antibodies, or sensitive to reducing the temperature of the adhesion assay to 7°C. Fibroblasts and melanocytes also constitutively bound HUT cells, but the binding to fibroblasts was highly temperature-sensitive. When keratinocytes were pretreated for 48 hours with gamma interferon plus phorbol ester, a 'superadhesive' state was induced, resulting in a synergistically increased binding ability of both HUT cells and Jurkat cells. This effect was related to quantitative increases in keratinocyte intercellular adhesion molecule-1 expression. Several other clear-cut qualitative and quantitative differences were detectable in the ability of HUT cells and JS cells to bind to nontreated and cytokine/phorbol ester-treated keratinocytes, fibroblasts, and melanocytes. These results emphasize the complexity of molecular associations underlying T-cell trafficking patterns, potentially operative in the dermal and epidermal compartments of the skin.

Original languageEnglish (US)
Pages (from-to)1365-1374
Number of pages10
JournalAmerican Journal of Pathology
Volume140
Issue number6
StatePublished - 1992

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