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The Journal of Immunology, 2001, 166: 2317-2322.
Copyright © 2001 by The American Association of Immunologists

Lysophosphatidic Acid Receptor-Selective Effects on Jurkat T Cell Migration Through a Matrigel Model Basement Membrane1

Yuhua Zheng, Yvonne Kong and Edward J. Goetzl2

Departments of Medicine and Microbiology-Immunology, University of California Medical Center, San Francisco, CA 94143

Lysophosphatidic acid (LPA) and sphingosine 1-phosphate (S1P) from platelets and mononuclear phagocytes mediate T cell functions through endothelial differentiation gene-encoded G protein-coupled receptors (Edg Rs) specific for LPA (Edg-2, -4, and -7) or S1P (Edg-1, -3, -5, -6, and -8). Jurkat leukemic T cells with the SV40 virus large T Ag (Jurkat-T cells) express Edg-3>-2>-4 Rs, as assessed by RT-semiquantitative PCR and Western blots with anti-Edg R mAbs. Jurkat-T cells expressing predominantly Edg-2 R (Jurkat-T-2 cells) and Edg-4 R (Jurkat-T-4 cells) were developed by cotransfection with the respective sense plasmids and a mixture of antisense plasmids for the other Edg Rs, and hygromycin selection. Migration of Jurkat-T-4 cells, but not Jurkat-T-2 cells, through a layer of Matrigel on a 5-um pore polycarbonate filter was stimulated up to 5-fold by 10-9 to 10-6 M LPA and by 30–300 ng/ml of anti-Edg-4 R Ab, but not anti-Edg-2 R Ab. LPA and anti-Edg-4 R Ab also enhanced by up to 4-fold the expression of matrix metalloproteinase by Jurkat-T-4 cells, but not Jurkat-T-2 cells, as assessed by cleavage of [3H]-type IV human collagen in the Matrigel. Enhancement of matrix metalloproteinase-dependent trans-Matrigel migration of Jurkat-T cells by the chemokine RANTES was suppressed by anti-Edg-2 R Abs, but was stimulated by anti-Edg-4 R Abs. The opposite effects of Edg-2 and Edg-4 LPA receptors on trans-Matrigel migration and some other T cell functions provide receptor-selective mechanisms for regulation of T cell recruitment and immune contributions.




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