Abstract
The transcription factor Foxp3 has an indispensable role in establishing stable transcriptional and functional programs of regulatory T cells (T(reg) cells). Loss of Foxp3 expression in mature T(reg) cells results in a failure of suppressor function, yet the molecular mechanisms that ensure steady, heritable Foxp3 expression in the T(reg) cell lineage remain unknown. Using T(reg) cell-specific gene targeting, we found that complexes of the transcription factors Runx and CBFbeta were required for maintenance of Foxp3 mRNA and protein expression in T(reg) cells. Consequently, mice lacking CBFbetab exclusively in the T(reg) cell lineage had a moderate lymphoproliferative syndrome. Thus, Runx-CBFbeta complexes maintain stable high expression of Foxp3 and serve as an essential determinant of T(reg) cell lineage stability.
MeSH Terms
Adoptive Transfer
Animals
Bone Marrow Transplantation
Cell Lineage/immunology
Core Binding Factor beta Subunit/immunology,metabolism
Female
Forkhead Transcription Factors/immunology,metabolism
Gene Expression Regulation
Gene Targeting
Lymph Nodes/cytology,immunology,pathology
Lymphoproliferative Disorders/immunology,pathology
Male
Mice
Mice, Inbred C57BL
Spleen/cytology,immunology,pathology
T-Lymphocytes, Regulatory/immunology,metabolism
Thymus Gland/cytology,immunology
Chemicals
Cbfb protein, mouse
Core Binding Factor beta Subunit
Forkhead Transcription Factors
Foxp3 protein, mouse
Authors & Affiliations
6 authors, click to expand affiliations / ORCID
Rudra Dipayan
Howard Hughes Medical Institute, University of Washington, Seattle, Washington, USA.
Egawa Takeshi
Chong Mark M W
Treuting Piper
Littman Dan R
Rudensky Alexander Y
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