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Aliahmad P , Kadavallore A , de la Torre B , Kappes D , Kaye J
TOX Is Required for Development of the CD4 T Cell Lineage Gene Program
Journal of Immunology. 2011 Dec;187(11) :5931-5940
PMID: WOS:000297450000053    PMCID: PMC3221881   
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Abstract
The factors that regulate thymic development of the CD4(+) T cell gene program remain poorly defined. The transcriptional regulator ThPOK is a dominant factor in CD4(+) T cell development, which functions primarily to repress the CD8 lineage fate. Previously, we showed that nuclear protein TOX is also required for murine CD4(+) T cell development. In this study, we sought to investigate whether the requirement for TOX was solely due to a role in ThPOK induction. In apparent support of this proposition, ThPOK upregulation and CD8 lineage repression were compromised in the absence of TOX, and enforced ThPOK expression could restore some CD4 development. However, these "rescued" CD4 cells were defective in many aspects of the CD4(+) T cell gene program, including expression of Id2, Foxol, and endogenous Thpok, among others. Thus, TOX is necessary to establish the CD4(+) T cell lineage gene program, independent of its influence on ThPOK expression. The Journal of Immunology, 2011, 187: 5931-5940.
Notes
Aliahmad, Parinaz Kadavallore, Asha de la Torre, Brian Kappes, Dietmar Kaye, Jonathan National Institutes of Health[R01AI054977] This work was supported by the National Institutes of Health (R01 AI054977 to J.K.). 58 Amer assoc immunologists Bethesda 853ua