Foxp1 is an essential transcriptional regulator for the generation of quiescent naive T cells during thymocyte development.
Proper thymocyte development is required to establish T-cell central tolerance and to generate naive T cells, both of which are essential for T-cell homeostasis and a functional immune system. Here we demonstrate that the loss of transcription factor Foxp1 results in the abnormal development of T cells. Instead of generating naive T cells, Foxp1-deficient single-positive thymocytes acquire an activated phenotype prematurely in the thymus and lead to the generation of peripheral CD4(+) T and CD8(+) T cells that exhibit an activated phenotype and increased apoptosis and readily produce cytokines upon T-cell receptor engagement. These results identify Foxp1 as an essential transcriptional regulator for thymocyte development and the generation of quiescent naive T cells.
Pubmed ID: 19965654 RIS Download
Animals | Apoptosis | Cell Differentiation | Cell Proliferation | Cells, Cultured | Forkhead Transcription Factors | Mice | Mice, Congenic | Mice, Inbred C57BL | Mice, Transgenic | Phenotype | Repressor Proteins | T-Lymphocytes | Thymus Gland | Transcription Factors