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Lymphocytes expressing γ/δ antigen receptors constitute a minor population in lymphoid tissue, but a major population within epidermal, gastraintestine, and vaginouterine epithelia. Gamma/Delta T cells are involved in immunological surveillance of epithelia separating the external environment from the internal milieu. The GL2 antibody reacts with Vδ4 T-cell receptor (TCR) bearing T cells, which are the predominant γ/δ T cells in intestinal epithelium (γ/δ IEL). Gamma/delta T cells has been found in mammary glad as well. The frequency of Vδ4 TCR-bearing cells varies among inbred strains of mice. |