Open AccessC-Myc regulation by costimulatory signals modulates the generation of CD8 + memory T cells during viral infection
Author(s) -
Mohammad Mahfuzul Haque,
Song Jin,
Kristin Fino,
Youfei Wang,
Praneet Sandhu,
Xinmeng Song,
Christopher C. Norbury,
Bing Ni,
Deyu Fang,
Shahram Salek-Ardakani,
Jianxun Song
Publication year - 2016
Publication title -
open biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.078
H-Index - 53
ISSN - 2046-2441
DOI - 10.1098/rsob.150208
Subject(s) - biology , cd8 , microbiology and biotechnology , virology , viral infection , cytotoxic t cell , immunology , virus , immune system , genetics , in vitro
The signalling mechanisms of costimulation in the development of memory T cells remain to be clarified. Here, we show that the transcription factor c-Myc in CD8 + T cells is controlled by costimulatory molecules, which modulates the development of memory CD8 + T cells. C-Myc expression was dramatically reduced in Cd28 −/− or Ox40 −/− memory CD8 + T cells, and c-Myc over-expression substantially reversed the defects in the development of T-cell memory following viral infection. C-Myc regulated the expression of survivin, an inhibitor of apoptosis, which promoted the generation of virus-specific memory CD8 + T cells. Moreover, over-expression of survivin with bcl-xL, a downstream molecule of NF- κ B and intracellular target of costimulation that controls survival, in Cd28 −/− or Ox40 −/− CD8 + T cells, reversed the defects in the generation of memory T cells in response to viral infection. These results identify c-Myc as a key controller of memory CD8 + T cells from costimulatory signals.