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    T-Helper Polarization: Regulation by Noncoding RNA and Super-Enhancers

    Gibbons, Hunter Ramsdell
    : https://etd.library.vanderbilt.edu/etd-10032019-143733
    http://hdl.handle.net/1803/14264
    : 2019-10-15

    Abstract

    Naïve CD4+ T cells polarize into many varied CD4+ T-helper (TH) cell subsets depending on the cytokine milieu present during T cell receptor stimulation. Each T cell subset produces a unique cytokine profile to defend against varied pathogens. The polarization of each T cell subset is regulated by unique transcription factors and noncoding elements to induce cytokine expression. The research detailed identifies a noncoding RNA, GATA3-AS1, which is necessary for the expression of GATA3 and TH2 cell polarization. Furthermore, we describe the repression of IFN-γ by super-enhancer disruption via bromodomain inhibitor JQ1. Our results lend novel insight into the regulation of hallmark genes by noncoding elements in T-helper cell polarization.
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