Receptor communication within the lymphocyte plasma membrane: a role for the thrombospondin family of matricellular proteins |
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Authors: | A. Forslöw Z. Liu K. -G. Sundqvist |
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Affiliation: | (1) Department of Laboratory Medicine, Division of Clinical Immunology, Karolinska Institute at Karolinska University Hospital Huddinge, SE-141 86 Stockholm, Sweden |
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Abstract: | Lymphocytes, the principal cells of the immune system, carry out immune surveillance throughout the body by their unique capacity to constantly reposition themselves between a free-floating vascular state and a tissue state characterized by migration and frequent adhesive interactions with endothelial cells and components of the extracellular matrix. Therefore, mechanisms co-ordinating adhesion and migration with signals delivered through antigen recognition probably play a pivotal role for the regulation of lymphocyte behaviour and function. Endogenous thrombospondin-1 (TSP-1) seems to be the hub in such a mechanism for autocrine regulation of T cell adhesion and migration. TSP-1 functions as a mediator of cis interaction of vital receptors within the T lymphocyte plasma membrane, including integrins, low density lipoprotein receptor-related protein, calreticulin and integrin-associated protein. Received 1 June 2006; received after revision 28 June 2006; accepted 11 October 2006 |
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Keywords: | Thrombospondin lymphocyte extracellular matrix adhesion integrin-associated protein antigen-presenting cell |
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