Cutting edge: CXCR4 is critical for CD8+ memory T cell homeostatic self-renewal but not rechallenge self-renewal.
Cutting edge: CXCR4 is critical for CD8+ memory T cell homeostatic self-renewal but not rechallenge self-renewal.
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DOI:
10.4049/jimmunol.1400488
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发表时间:
2014-08-01
期刊:
影响因子:
--
通讯作者:
Reiner SL
中科院分区:
文献类型:
--
作者:
Chaix J;Nish SA;Lin WH;Rothman NJ;Ding L;Wherry EJ;Reiner SL
Central memory (CM) CD8+ T cells “remember” prior encounters because they maintain themselves through cell division in the absence of ongoing challenge (homeostatic self-renewal) as well as reproduce the central memory fate while manufacturing effector cells during secondary antigen encounters (rechallenge self-renewal). We tested the consequence of conditional deletion of the bone marrow (BM) homing receptor CXCR4 on antiviral T cell responses. CXCR4-deficient CD8+ T cells have impaired memory cell maintenance due to defective homeostatic proliferation. Upon rechallenge, however, CXCR4-deficient T cells can re-expand and renew the central memory pool while producing secondary effector cells. The critical BM-derived signals essential for CD8+ T cell homeostatic self-renewal appear to be dispensable to yield self-renewing, functionally asymmetric cell fates during rechallenge.
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