Abstract:
:CD4-unhelped CD8(+) T cells are functionally defective T cells primed in the absence of CD4(+) T cell help. Given the co-stimulatory role of natural-killer group 2, member D protein (NKG2D) on CD8(+) T cells, we investigated its ability to rescue these immunologically impotent cells. We demonstrate that augmented co-stimulation through NKG2D during priming paradoxically rescues memory, but not effector, CD8(+) T cell responses. NKG2D-mediated rescue is characterized by reversal of elevated transcription factor T-box expressed in T cells (T-bet) expression and recovery of interleukin-2 and interferon-γ production and cytolytic responses. Rescue is abrogated in CD8(+) T cells lacking NKG2D. Augmented co-stimulation through NKG2D confers a high rate of survival to mice lacking CD4(+) T cells in a CD4-dependent influenza model and rescues HIV-specific CD8(+) T cell responses from CD4-deficient HIV-positive donors. These findings demonstrate that augmented co-stimulation through NKG2D is effective in rescuing CD4-unhelped CD8(+) T cells from their pathophysiological fate and may provide therapeutic benefits.
journal_name
Nat Medjournal_title
Nature medicineauthors
Zloza A,Kohlhapp FJ,Lyons GE,Schenkel JM,Moore TV,Lacek AT,O'Sullivan JA,Varanasi V,Williams JW,Jagoda MC,Bellavance EC,Marzo AL,Thomas PG,Zafirova B,Polić B,Al-Harthi L,Sperling AI,Guevara-Patiño JAdoi
10.1038/nm.2683subject
Has Abstractpub_date
2012-02-26 00:00:00pages
422-8issue
3eissn
1078-8956issn
1546-170Xpii
nm.2683journal_volume
18pub_type
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