title: Transient activation of the c-Jun N-terminal kinase (JNK) activity by ligation of the tetraspan CD53 antigen in different cell types.
abstract: The CD53 antigen is a member of the tetraspanin membrane protein family that is expressed in the lymphoid-myeloid lineage. We have studied the implication of CD53 antigen in signal transduction by determining the effect of its ligation on the c-Jun N-terminal kinase (JNK) in different cell types. Ligation of the rat or human CD53 antigen induces a three- to fourfold transient activation of JNK activity that peaks at 3-5 min. The effect was detected by assaying the endogenous or exogenous (transfected) JNK activity. The JNK response was detected in IR938F cells, a rat B-cell lymphoma, and in Jurkat cells derived from a human T-cell lymphoma. This JNK activation was not mediated by the vav oncogene, and CD53 does not cooperate with CD3 for vav activation. A similar JNK activation was also detected in a human renal carcinoma cell line that was transiently transfected with the human CD53 cDNA to mimic the CD53 ectopic expression in carcinomas. In stable CD53-transfected cells it stimulated Jun-dependent transcriptional activity. We conclude that parts of the cell responses modulated by the CD53 are mediated by JNK activation, and this activation is independent of the different protein interactions that the CD53 protein has on specific cell types.
authors.affiliation: Centro de Investigación del Cáncer, Instituto de Biología Molecular y Celular del Cáncer, C.S.I.C. Universidad de Salamanca, Spain.
authors.forename: Mónica
authors.initials: M
authors.lastname: Yunta
authors.forename: José L
authors.initials: JL
authors.lastname: Oliva
authors.forename: Ramiro
authors.initials: R
authors.lastname: Barcia
authors.forename: Vaclav
authors.initials: V
authors.lastname: Horejsi
authors.forename: Paula
authors.initials: P
authors.lastname: Angelisova
authors.forename: Pedro A
authors.initials: PA
authors.lastname: Lazo
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000494:pharmacology; D015703:Antigens, CD / Q000235:genetics / Q000276:immunology / Q000378:metabolism*; D000945:Antigens, Differentiation, T-Lymphocyte / Q000235:genetics / Q000276:immunology / Q000378:metabolism*; D001402:B-Lymphocytes / Q000378:metabolism; D017252:CD3 Complex / Q000378:metabolism; D002478:Cells, Cultured; D004789:Enzyme Activation; D006801:Humans; D048031:JNK Mitogen-Activated Protein Kinases; D019169:Jurkat Cells; D020928:Mitogen-Activated Protein Kinases / Q000187:drug effects / Q000235:genetics / Q000378:metabolism*; D015513:Oncogene Proteins / Q000378:metabolism; D010766:Phosphorylation; D051567:Proto-Oncogene Proteins c-vav; D051381:Rats; D060265:Tetraspanin 25; D014158:Transcription, Genetic
chemical_list: D000911:Antibodies, Monoclonal; D015703:Antigens, CD; D000945:Antigens, Differentiation, T-Lymphocyte; D017252:CD3 Complex; C554894:CD53 protein, human; C554896:Cd53 protein, rat; D015513:Oncogene Proteins; D051567:Proto-Oncogene Proteins c-vav; D060265:Tetraspanin 25; C496618:VAV1 protein, human; C496620:Vav1 protein, rat; D048031:JNK Mitogen-Activated Protein Kinases; D020928:Mitogen-Activated Protein Kinases