CD28 facilitates the generation of Foxp3(-) cytokine responsive regulatory T cell precursors.
CD28 facilitates the generation of Foxp3(-) cytokine responsive regulatory T cell precursors.
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DOI:
10.4049/jimmunol.1000019
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发表时间:
2010-06-01
期刊:
影响因子:
--
通讯作者:
Green JM
中科院分区:
文献类型:
--
作者:
Lio CW;Dodson LF;Deppong CM;Hsieh CS;Green JM
The T cell co-stimulatory molecule CD28 plays an important role in the thymic generation of Foxp3+ regulatory T (Treg) cells essential for the maintenance of self-tolerance. Here, we show that a cell-intrinsic signal from CD28 is involved in the generation of cytokine-responsive Foxp3− precursors using studies of mixed bone marrow chimeras, as well as TCR-specific generation of Foxp3+ cells using intrathymic transfer of TCR transgenic thymocytes expressing a natural Treg TCR. Contrary to a previous report, the analysis of CD28 mutant knock-in mice revealed that this cell-intrinsic signal is only partially dependent on the Lck-binding PYAP motif. Surprisingly, even though the absence of CD28 resulted in a 6-fold decrease in thymic Treg cells, the TCR repertoires of CD28-deficient and sufficient cells were largely overlapping. Thus, these data suggest that CD28 does not operate by markedly enlarging the repertoire of TCRs available for Treg cell development, but rather by improving the efficiency of Treg cell development of thymocytes expressing natural Treg TCRs.
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DOI:
10.1084/jem.20052230
发表时间:
2006-09-04
期刊:
The Journal of experimental medicine
影响因子:
--
作者:
Friend LD;Shah DD;Deppong C;Lin J;Bricker TL;Juehne TI;Rose CM;Green JM
通讯作者:
Green JM
影响因子:
32.4
作者:
Fontenot, JD;Rasmussen, JP;Rudensky, AY
通讯作者:
Rudensky, AY
影响因子:
32.4
作者:
Hill, Jonathan A.;Feuerer, Markus;Benoist, Christophe
通讯作者:
Benoist, Christophe
影响因子:
30.5
作者:
Hsieh, CS;Zheng, Y;Rudensky, AY
通讯作者:
Rudensky, AY
影响因子:
4.4
作者:
Burchill, Matthew A.;Yang, Jianying;Farrar, Michael A.
通讯作者:
Farrar, Michael A.