In:
The Journal of Immunology, The American Association of Immunologists, Vol. 196, No. 1_Supplement ( 2016-05-01), p. 79.8-79.8
Abstract:
During an acute respiratory viral infection, effector CD8 T cells differentiate into short-lived effector cells (SLECs) that are destined to die and memory precursor effector cells (MPECs) that give rise to long-lived memory cells. Defining the precise molecular cues that regulate the survival of MPECs is of great interest. HVEM (Herpes Virus Entry Mediator) is a member of tumor necrosis factor receptor (TNF) superfamily that acts as a molecular switch between pro-inflammatory and inhibitory signaling by respectively binding with its endogenous ligand (LIGHT) from the TNF family and with (BTLA) from the Ig like CD28/B7 family. Using respiratory vaccinia virus (VACV) infection in mice, we found that HVEM was selectively expressed on MPECs but not on SLECs. Lack of HVEM on Ag-specific CD8 T cells resulted in an altered SLEC/MPEC ratio, with effector cells skewing more towards SLEC phenotype. Adoptive transfer of HVEM-deficient MPECs showed markedly increased contraction after viral clearance, leading to nearly complete loss of lung-resident CD8 memory T cells. Similar to CD8 T cells lacking HVEM, WT CD8 T cells failed to accumulate in LIGHT-deficient host but not BTLA-deficient host upon VACV infection. Collectively, these results reveal that HVEM expression on MPECs is critical for the development of long-lived memory cells and suggests that strategies targeting HVEM signaling might be beneficial in augmenting CD8 T cell immunity against respiratory viruses.
Type of Medium:
Online Resource
ISSN:
0022-1767
,
1550-6606
DOI:
10.4049/jimmunol.196.Supp.79.8
Language:
English
Publisher:
The American Association of Immunologists
Publication Date:
2016
detail.hit.zdb_id:
1475085-5
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