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Molecular Endocrinology, Vol 8, 674-681, Copyright © 1994 by Endocrine Society
ARTICLES |
CV Clevenger and MV Medaglia
Department of Pathology and Laboratory Medicine, University of Pennsylvania Medical Center, Philadelphia 19104.
The clonal expansion of antigen-stimulated T-lymphocytes during an immune response is mediated by several lymphokines. Strong evidence now exists that the neuroendocrine hormone PRL is necessary, but not sufficient, for T-cell proliferation. Little is known, however, of the signal transduction mechanisms of the PRL receptor (PRLR) within T- cells. We demonstrate here that PRL stimulation of the T-cell line Nb2 induced the concentration- and time-dependent activation of the protein tyrosine kinase p59fyn, but not of four other src family protein tyrosine kinases. Activation of fyn was also observed in Concanavalin-A- primed peripheral blood lymphocytes stimulated with PRL and in Nb2 cells incubated with anti-PRLR antibodies. The activation of fyn by PRL stimulation correlated with Nb2 cell proliferation. Immunoblot analysis of anti-fyn and anti-PRLR immune complexes revealed an association between each PRLR isoform and p59fyn. These studies demonstrate for the first time an association between the PRLR and a src family protein tyrosine kinase affiliated with signal transduction.
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M. J. Blake, A. R. Buckley, M. Zhang, D. J. Buckley, and K. P. Lavoi A Novel Heat Shock Response in Prolactin-dependent Nb2 Node Lymphoma Cells J. Biol. Chem., December 8, 1995; 270(49): 29614 - 29620. [Abstract] [Full Text] [PDF] |
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N. B. Prevarskaya, R. N. Skryma, P. Vacher, N. Daniel, J. Djiane, and B. Dufy Role of Tyrosine Phosphorylation in Potassium Channel Activation J. Biol. Chem., October 13, 1995; 270(41): 24292 - 24299. [Abstract] [Full Text] [PDF] |
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C. V. Clevenger, W. Ngo, D. L. Sokol, S. M. Luger, and , A. M. Gewirtz Vav Is Necessary for Prolactin-stimulated Proliferation and Is Translocated into the Nucleus of a T-cell Line J. Biol. Chem., June 2, 1995; 270(22): 13246 - 13253. [Abstract] [Full Text] [PDF] |
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J. W. Tanner, W. Chen, R. L. Young, G. D. Longmore, and A. S. Shaw The Conserved Box 1 Motif of Cytokine Receptors Is Required for Association with JAK Kinases J. Biol. Chem., March 24, 1995; 270(12): 6523 - 6530. [Abstract] [Full Text] [PDF] |
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Y. Cheng, I. Zhizhin, R. L. Perlman, and D. Mangoura Prolactin-induced Cell Proliferation in PC12 Cells Depends on JNK but Not ERK Activation J. Biol. Chem., July 21, 2000; 275(30): 23326 - 23332. [Abstract] [Full Text] [PDF] |
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S. Ali and S. Ali Recruitment of the Protein-tyrosine Phosphatase SHP-2 to the C-terminal Tyrosine of the Prolactin Receptor and to the Adaptor Protein Gab2 J. Biol. Chem., December 8, 2000; 275(50): 39073 - 39080. [Abstract] [Full Text] [PDF] |
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