title: Interleukin-7 can induce the activation of Jak 1, Jak 3 and STAT 5 proteins in murine T cells.
abstract: The activation of Janus protein tyrosine kinases (Jak) and STAT (signal transducer and activator of transcription) proteins has recently been linked to the signal transduction mechanism of several cytokines. IL-7 was observed to induce a rapid and dose-dependent tyrosine phosphorylation of Jak 1 and Jak 3 and concomitantly, the tyrosine phosphorylation and DNA binding activity of multiple STAT proteins. The STAT proteins utilized by IL-7 were identical to those induced by IL-2 and could be identified as various STAT 5 isoforms. Moreover, the induction of both Jak 1 and 3, and STAT 5 activity strongly correlated with the growth-promoting effects of IL-7, suggesting that this signal transduction mechanism may play a key role in IL-7-induced proliferation.
mesh_terms: D000818:Animals; D001483:Base Sequence; D002478:Cells, Cultured; D004268:DNA-Binding Proteins / Q000096:biosynthesis*; D004789:Enzyme Activation / Q000187:drug effects; D006801:Humans; D007376:Interleukin-2 / Q000494:pharmacology; D015851:Interleukin-7 / Q000494:pharmacology*; D053613:Janus Kinase 1; D053616:Janus Kinase 3; D051379:Mice; D008894:Milk Proteins; D008969:Molecular Sequence Data; D010766:Phosphorylation / Q000187:drug effects; D011505:Protein-Tyrosine Kinases / Q000096:biosynthesis*; D050799:STAT5 Transcription Factor; D013601:T-Lymphocytes / Q000187:drug effects* / Q000378:metabolism; D015534:Trans-Activators / Q000096:biosynthesis*
chemical_list: D004268:DNA-Binding Proteins; D007376:Interleukin-2; D015851:Interleukin-7; D008894:Milk Proteins; D050799:STAT5 Transcription Factor; D015534:Trans-Activators; D011505:Protein-Tyrosine Kinases; C507904:JAK1 protein, human; C507933:JAK3 protein, human; C507905:Jak1 protein, mouse; C507935:Jak3 protein, mouse; D053613:Janus Kinase 1; D053616:Janus Kinase 3