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    DNA-binding of the Tet-transactivator curtails antigen-induced lymphocyte activation in mice

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    Author
    Ottina, E; Peperzak, V; Schoeler, K; Carrington, E; Sgonc, R; Pellegrini, M; Preston, S; Herold, MJ; Strasser, A; Villunger, A
    Date
    2017-10-18
    Source Title
    Nature Communications
    Publisher
    NATURE PUBLISHING GROUP
    University of Melbourne Author/s
    Herold, Marco; Carrington, Emma; Preston, Simon; Pellegrini, Marc; Strasser, Andreas
    Affiliation
    Medical Biology (W.E.H.I.)
    Metadata
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    Document Type
    Journal Article
    Citations
    Ottina, E., Peperzak, V., Schoeler, K., Carrington, E., Sgonc, R., Pellegrini, M., Preston, S., Herold, M. J., Strasser, A. & Villunger, A. (2017). DNA-binding of the Tet-transactivator curtails antigen-induced lymphocyte activation in mice. NATURE COMMUNICATIONS, 8 (1), https://doi.org/10.1038/s41467-017-01022-4.
    Access Status
    Open Access
    URI
    http://hdl.handle.net/11343/257248
    DOI
    10.1038/s41467-017-01022-4
    Abstract
    The Tet-On/Off system for conditional transgene expression constitutes state-of-the-art technology to study gene function by facilitating inducible expression in a timed and reversible manner. Several studies documented the suitability and versatility of this system to trace lymphocyte fate and to conditionally express oncogenes or silence tumour suppressor genes in vivo. Here, we show that expression of the tetracycline/doxycycline-controlled Tet-transactivator, while tolerated well during development and in immunologically unchallenged animals, impairs the expansion of antigen-stimulated T and B cells and thereby curtails adaptive immune responses in vivo. Transactivator-mediated cytotoxicity depends on DNA binding, but can be overcome by BCL2 overexpression, suggesting that apoptosis induction upon lymphocyte activation limits cellular and humoral immune responses. Our findings suggest a possible system-intrinsic biological bias of the Tet-On/Off system in vivo that will favour the outgrowth of apoptosis resistant clones, thus possibly confounding data published using such systems.

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