Negative selection during the peripheral immune response to antigen.
Negative selection during the peripheral immune response to antigen.
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DOI:
10.1084/jem.193.1.1
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发表时间:
2001-01-01
期刊:
影响因子:
--
通讯作者:
Wraith DC
中科院分区:
文献类型:
--
作者:
Anderton SM;Radu CG;Lowrey PA;Ward ES;Wraith DC
Thymic selection depends on positive and negative selective mechanisms based on the avidity of T cell interaction with antigen–major histocompatibility complex complexes. However, peripheral mechanisms for the recruitment and clonal expansion of the responding T cell repertoire remain obscure. Here we provide evidence for an avidity-based model of peripheral T cell clonal expansion in response to antigenic challenge. We have used the encephalitogenic, H-2 Au-restricted, acetylated NH2-terminal nonameric peptide (Ac1-9) epitope from myelin basic protein as our model antigen. Peptide analogues were generated that varied in antigenic strength (as assessed by in vitro assay) based on differences in their binding affinity for Au. In vivo, these analogues elicited distinct repertoires of T cells that displayed marked differences in antigen sensitivity. Immunization with the weakest (wild-type) antigen expanded the high affinity T cells required to induce encephalomyelitis. In contrast, immunization with strongly antigenic analogues led to the elimination of T cells bearing high affinity T cell receptors by apoptosis, thereby preventing disease development. Moreover, the T cell repertoire was consistently tuned to respond to the immunizing antigen with the same activation threshold. This tuning mechanism provides a peripheral control against the expansion of autoreactive T cells and has implications for immunotherapy and vaccine design.
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影响因子:
32.4
作者:
Ernst, B;Lee, DS;Surh, CD
通讯作者:
Surh, CD
DOI:
10.1084/jem.186.8.1223
发表时间:
1997-10-20
期刊:
The Journal of experimental medicine
影响因子:
--
作者:
Brocker T
通讯作者:
Brocker T
DOI:
10.1073/pnas.89.21.10365
发表时间:
1992-11-01
影响因子:
11.1
作者:
GROSSMAN, Z;PAUL, WE
通讯作者:
PAUL, WE
影响因子:
64.8
作者:
Alam, SM;Travers, PJ;Gascoigne, NRJ
通讯作者:
Gascoigne, NRJ
DOI:
10.1084/jem.186.8.1269
发表时间:
1997-10-20
期刊:
The Journal of experimental medicine
影响因子:
--
作者:
Kirberg J;Berns A;von Boehmer H
通讯作者:
von Boehmer H