Transmembrane signaling via both CD3 and CD2 human T cell surface molecules involves protein kinase-C translocation.
The activation of T lymphocytes by appropriate pairs of anti-CD2 monoclonal antibodies has been shown to involve phospholipase-C and phosphoinositide hydrolysis. In this paper we show that the stimulation of the human cloned leukemic T cell line Jurkat by anti-CD2 as well as anti-CD3 monoclonal antibodies induces translocation from cytosol to cell membrane of protein kinase-C (PKC), which is dependent on the formation of 1,2-diacylglycerol from inositol 4,5-diphosphate. PKC translocation is rapid and transient: the kinetics of enzyme redistribution are similar for CD2 and CD3. These results further stress that CD2 and CD3 T cell activation pathways use similar signal transducing mechanisms.
Bagnasco
M
M
Istituto Scientifico di Medicina Interna, Università degli Studi di Genova, INSERM U-119, Marseille.
Nunes
J
J
Lopez
M
M
Lipcey
C
C
Mawas
C
C
Olive
D
D
D000911:Antibodies, Monoclonal / Q000494:pharmacology; D015703:Antigens, CD / Q000502:physiology*; D000945:Antigens, Differentiation, T-Lymphocyte / Q000502:physiology*; D001692:Biological Transport; D018801:CD2 Antigens; D017252:CD3 Complex; D002118:Calcium / Q000378:metabolism; D002478:Cells, Cultured; D006801:Humans; D008213:Lymphocyte Activation; D011493:Protein Kinase C / Q000378:metabolism*; D011948:Receptors, Antigen, T-Cell / Q000502:physiology*; D011971:Receptors, Immunologic / Q000502:physiology*; D015398:Signal Transduction / Q000502:physiology*; D013601:T-Lymphocytes / Q000502:physiology*
D000911:Antibodies, Monoclonal; D015703:Antigens, CD; D000945:Antigens, Differentiation, T-Lymphocyte; D018801:CD2 Antigens; D017252:CD3 Complex; D011948:Receptors, Antigen, T-Cell; D011971:Receptors, Immunologic; D011493:Protein Kinase C; D002118:Calcium