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2016 ; 45
(3
): 540-554
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English Wikipedia
mTORC1 and mTORC2 Kinase Signaling and Glucose Metabolism Drive Follicular Helper
T Cell Differentiation
#MMPMID27637146
Zeng H
; Cohen S
; Guy C
; Shrestha S
; Neale G
; Brown SA
; Cloer C
; Kishton RJ
; Gao X
; Youngblood B
; Do M
; Li MO
; Locasale JW
; Rathmell JC
; Chi H
Immunity
2016[Sep]; 45
(3
): 540-554
PMID27637146
show ga
Follicular helper T (Tfh) cells are crucial for germinal center (GC) formation
and humoral adaptive immunity. Mechanisms underlying Tfh cell differentiation in
peripheral and mucosal lymphoid organs are incompletely understood. We report
here that mTOR kinase complexes 1 and 2 (mTORC1 and mTORC2) are essential for Tfh
cell differentiation and GC reaction under steady state and after antigen
immunization and viral infection. Loss of mTORC1 and mTORC2 in T cells exerted
distinct effects on Tfh cell signature gene expression, whereas increased mTOR
activity promoted Tfh responses. Deficiency of mTORC2 impaired CD4(+) T cell
accumulation and immunoglobulin A production and aberrantly induced the
transcription factor Foxo1. Mechanistically, the costimulatory molecule ICOS
activated mTORC1 and mTORC2 to drive glycolysis and lipogenesis, and glucose
transporter 1-mediated glucose metabolism promoted Tfh cell responses.
Altogether, mTOR acts as a central node in Tfh cells by linking immune signals to
anabolic metabolism and transcriptional activity.