Transgenic Expression of Ly-49A in Thymocytes Alters Repertoire Selection1
Transgenic Expression of Ly-49A in Thymocytes Alters Repertoire Selection1
复制标题
胸腺细胞中 Ly-49A 的转基因表达改变了库选择1
作者:
M. Pauza;Kathleen M. Smith;H. Neal;C. Reilly;L. Lanier;D. Lo
A T cell-specific Ly-49A transgene inhibits TCR-mediated activation in the presence of H-2Dd. Expression of this transgene by developing thymocytes impairs negative selection evidenced by a failure to delete potentially autoreactive T cells and development of a graft-vs-host-disease-like syndrome. In mice carrying both the Ly-49A and a class II-restricted TCR transgene, positive selection was lost, but only when H-2Dd was present on thymic epithelium. These results are consistent with models suggesting that thymic selection is dependent on the perceived intensity of TCR signaling. More interestingly, these results show that Ly-49A does not simply provide a strict on/off switch for T cell responses. Since Ly-49A may shift the signaling threshold of TCR-induced triggering, inducible expression of Ly-49A may regulate peripheral memory/activated T cells by raising the threshold for T cell reactivation.
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影响因子:
56.9
作者:
Lee, KM;Chuang, E;Bluestone, JA
通讯作者:
Bluestone, JA
影响因子:
32.4
作者:
VANOERS, NSC;KILLEEN, N;WEISS, A
通讯作者:
WEISS, A
DOI:
--
发表时间:
1996
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Su,X;Zhou,T;Yang,PA;Wang,Z;Mountz,JD
通讯作者:
Mountz,JD
影响因子:
20.3
作者:
Cooke, KR;Krenger, W;Ferrara, JLM
通讯作者:
Ferrara, JLM
DOI:
--
发表时间:
1997
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Brunmark,A;O'Rourke,AM
通讯作者:
O'Rourke,AM