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  • Title: Stat5 synergizes with T cell receptor/antigen stimulation in the development of lymphoblastic lymphoma.
    Author: Kelly JA, Spolski R, Kovanen PE, Suzuki T, Bollenbacher J, Pise-Masison CA, Radonovich MF, Lee S, Jenkins NA, Copeland NG, Morse HC, Leonard WJ.
    Journal: J Exp Med; 2003 Jul 07; 198(1):79-89. PubMed ID: 12835478.
    Abstract:
    Signal transducer and activator of transcription (STAT) proteins are latent transcription factors that mediate a wide range of actions induced by cytokines, interferons, and growth factors. We now report the development of thymic T cell lymphoblastic lymphomas in transgenic mice in which Stat5a or Stat5b is overexpressed within the lymphoid compartment. The rate of lymphoma induction was markedly enhanced by immunization or by the introduction of TCR transgenes. Remarkably, the Stat5 transgene potently induced development of CD8+ T cells, even in mice expressing a class II-restricted TCR transgene, with resulting CD8+ T cell lymphomas. These data demonstrate the oncogenic potential of dysregulated expression of a STAT protein that is not constitutively activated, and that TCR stimulation can contribute to this process.
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