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2016 ; 35
(8
): 881-98
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
The transcriptional coactivator Bob1 promotes the development of follicular T
helper cells via Bcl6
#MMPMID26957522
Stauss D
; Brunner C
; Berberich-Siebelt F
; Höpken UE
; Lipp M
; Müller G
EMBO J
2016[Apr]; 35
(8
): 881-98
PMID26957522
show ga
Follicular T helper (Tfh) cells are key regulators of the germinal center
reaction and long-term humoral immunity. Tfh cell differentiation requires the
sustained expression of the transcriptional repressor Bcl6; however, its
regulation in CD4(+)T cells is incompletely understood. Here, we report that the
transcriptional coactivator Bob1, encoded by thePou2af1gene, promotes Bcl6
expression and Tfh cell development. We found that Bob1 together with the octamer
transcription factors Oct1/Oct2 can directly bind to and transactivate
theBcl6andBtlapromoters. Mixed bone marrow chimeras revealed that Bob1 is
required for the expression of normal levels of Bcl6 andBTLA, thereby controlling
the pool size and composition of the Tfh compartment in a T cell-intrinsic
manner. Our data indicate that T cell-expressed Bob1 is directly involved in Tfh
cell differentiation and required for mounting normal T cell-dependent B-cell
responses.