Memory programming in CD8+ T-cell differentiation is intrinsic and is not determined by CD4 help

Juhyun Kim, Su Jeong Ryu, Keunhee Oh, Ji-Min Ju, Ji Yeong Jeon, Giri Nam, Dong-Sup Lee, Hang-Rae Kim, Joo Young Kim, Jun Chang, Thomas Sproule, Kyungho Choi, Derry Roopenian and Eun Young Choi ()
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Juhyun Kim: Seoul National University College of Medicine
Su Jeong Ryu: Seoul National University College of Medicine
Keunhee Oh: Seoul National University College of Medicine
Ji-Min Ju: Seoul National University College of Medicine
Ji Yeong Jeon: Seoul National University College of Medicine
Giri Nam: Seoul National University College of Medicine
Dong-Sup Lee: Seoul National University College of Medicine
Hang-Rae Kim: Seoul National University College of Medicine
Joo Young Kim: Ewha Womans University
Jun Chang: Ewha Womans University
Thomas Sproule: The Jackson Laboratory
Kyungho Choi: Seoul National University College of Medicine
Derry Roopenian: The Jackson Laboratory
Eun Young Choi: Seoul National University College of Medicine

Nature Communications, 2015, vol. 6, issue 1, 1-17

Abstract: Abstract CD8+ T cells activated without CD4+ T-cell help are impaired in memory expansion. To understand the underlying cellular mechanism, here we track the dynamics of helper-deficient CD8+ T-cell response to a minor histocompatibility antigen by phenotypic and in vivo imaging analyses. Helper-deficient CD8+ T cells show reduced burst expansion, rapid peripheral egress, delayed antigen clearance and continuous activation, and are eventually exhausted. Contrary to the general consensus that CD4 help encodes memory programmes in CD8+ T cells and helper-deficient CD8+ T cells are abortive, these cells can differentiate into effectors and memory precursors. Importantly, accelerating antigen clearance or simply increasing the burst effector size enables generation of memory cells by CD8+ T cells, regardless of CD4 help. These results suggest that the memory programme is CD8+ T-cell-intrinsic, and provide insight into the role of CD4 help in CD8+ T-cell responses.

Date: 2015
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DOI: 10.1038/ncomms8994

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