Viral antigen and extensive division maintain virus-specific CD8 T cells during chronic infection.
Viral antigen and extensive division maintain virus-specific CD8 T cells during chronic infection.
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DOI:
10.1084/jem.20061937
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发表时间:
2007-04-16
期刊:
影响因子:
--
通讯作者:
Wherry EJ
中科院分区:
文献类型:
--
作者:
Shin H;Blackburn SD;Blattman JN;Wherry EJ
Efficient maintenance of memory CD8 T cells is central to long-term protective immunity. IL-7– and IL-15–driven homeostatic proliferation is essential for long-term memory CD8 T cell persistence after acute infections. During chronic infections, however, virus-specific CD8 T cells respond poorly to these cytokines. Yet, virus-specific CD8 T cells often persist for long periods of time during chronic infections. We have addressed this apparent paradox by examining the mechanism for maintaining virus-specific CD8 T cells during chronic infection. We find that homeostatic cytokines (e.g., IL-7/15), inflammatory signals, and priming of recent thymic emigrants are not sufficient to maintain virus-specific CD8 T cells over time during chronic infection. Rather, our results demonstrate that viral peptide is required for virus-specific CD8 T cell persistence during chronic infection. Moreover, this viral antigen-dependent maintenance results in a dramatically different type of T cell division than is normally observed during memory T cell homeostasis. Rather than undergoing slow, steady homeostatic turnover during chronic viral infection, CD8 T cells undergo extensive peptide-dependent division, yet cell numbers remain relatively stable. These results indicate that antigen-specific CD8 T cell responses during persisting infection are maintained by a mechanism distinct from that after acute infection.
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影响因子:
64.5
作者:
Kaech, SM;Hemby, S;Ahmed, R
通讯作者:
Ahmed, R
影响因子:
15.3
作者:
Goldrath, Ananda W;Sivakumar, Pallavur V;Glaccum, Moira;Kennedy, Mary K;Bevan, Michael J;Benoist, Christophe;Mathis, Diane;Butz, Eric A
通讯作者:
Butz, Eric A
DOI:
10.1084/jem.20030735
发表时间:
2003-12-15
期刊:
The Journal of experimental medicine
影响因子:
--
作者:
Kondrack RM;Harbertson J;Tan JT;McBreen ME;Surh CD;Bradley LM
通讯作者:
Bradley LM
影响因子:
30.5
作者:
Kaech, SM;Tan, JT;Ahmed, R
通讯作者:
Ahmed, R
影响因子:
64.8
作者:
LAU, LL;JAMIESON, BD;AHMED, R
通讯作者:
AHMED, R