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Publication : Impact of the TCR signal on regulatory T cell homeostasis, function, and trafficking.

First Author  Kim JK Year  2009
Journal  PLoS One Volume  4
Issue  8 Pages  e6580
PubMed ID  19668367 Mgi Jnum  J:152472
Mgi Id  MGI:4358820 Doi  10.1371/journal.pone.0006580
Citation  Kim JK, et al. (2009) Impact of the TCR signal on regulatory T cell homeostasis, function, and trafficking. PLoS One 4(8):e6580
abstractText  Signaling through the T cell antigen receptor (TCR) is important for the homeostasis of naive and memory CD4(+) T cells. The significance of TCR signaling in regulatory T (Treg) cells has not been systematically addressed. Using an Ox40-cre allele that is prominently expressed in Treg cells, and a conditional null allele of the gene encoding p56(Lck), we have examined the importance of TCR signaling in Treg cells. Inactivation of p56(Lck) resulted in abnormal Treg homeostasis characterized by impaired turnover, preferential redistribution to the lymph nodes, loss of suppressive function, and striking changes in gene expression. Abnormal Treg cell homeostasis and function did not reflect the involvement of p56(Lck) in CD4 function because these effects were not observed when CD4 expression was inactivated by Ox40-cre.The results make clear multiple aspects of Treg cell homeostasis and phenotype that are dependent on a sustained capacity to signal through the TCR.
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