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2015 ; 212
(12
): 2041-56
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The transcription factors ZEB2 and T-bet cooperate to program cytotoxic T cell
terminal differentiation in response to LCMV viral infection
#MMPMID26503446
Dominguez CX
; Amezquita RA
; Guan T
; Marshall HD
; Joshi NS
; Kleinstein SH
; Kaech SM
J Exp Med
2015[Nov]; 212
(12
): 2041-56
PMID26503446
show ga
The transcription factor T-bet is critical for cytotoxic T lymphocyte (CTL)
differentiation, but it is unclear how it operates in a graded manner in the
formation of both terminal effector and memory precursor cells during viral
infection. We find that, at high concentrations, T-bet induced expression of Zeb2
mRNA, which then triggered CTLs to adopt terminally differentiated states. ZEB2
and T-bet cooperate to switch on a terminal CTL differentiation program, while
simultaneously repressing genes necessary for central memory CTL development.
Chromatin immunoprecipitation sequencing showed that a large proportion of these
genes were bound by T-bet, and this binding was altered by ZEB2 deficiency.
Furthermore, T-bet overexpression could not fully bypass ZEB2 function. Thus, the
coordinated actions of T-bet and ZEB2 outline a novel genetic pathway that forces
commitment of CTLs to terminal differentiation, thereby restricting their memory
cell potential.