PMID: 9637409Jun 24, 1998Paper

Expression of T lymphocyte adhesion molecules: regulation during antigen-induced T cell activation and differentiation

Critical Reviews in Immunology
M O Dailey

Abstract

The pattern of lymphocyte traffic and migration in vivo is a composite of constitutive recirculation and transient changes induced by interaction with antigen. Naive T lymphocytes in their basal, unstimulated state continuously recirculate throughout the entire host, poised to react to specific antigens that they are programmed to recognize. After interaction with antigen, T cell traffic changes, first with the trapping of reactive cells in antigen-containing lymphoid tissue. Subsequently, the effector cells responding to antigen, accompanied by nonspecific T cells and monocytes, traffic in large numbers to sites of antigen localization, resulting in the localized inflammatory response. Then, as the immune response wanes, memory T cells develop, many of which exhibit still different routes of recirculation. The traffic and tissue localization of leukocytes is regulated by a series of cell surface adhesion molecules that recognize specific ligands on endothelial cells and in the extracellular matrix. Modulation of the expression of these adhesion molecules results in the changes in T cell traffic that are characteristic of each stage of T cell differentiation. Thus, during T cell activation and differentiation, the down-regulati...Continue Reading

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Cell adhesion molecules are a subset of cell adhesion proteins located on the cell surface involved in binding with other cells or with the extracellular matrix in the process called cell adhesion. In essence, cell adhesion molecules help cells stick to each other and to their surroundings. Cell adhesion is a crucial component in maintaining tissue structure and function. Discover the latest research on adhesion molecule and their role in health and disease here.

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