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2016 ; 15
(14
): 1919-28
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Forced KLF4 expression increases the generation of mature plasma cells and
uncovers a network linked with plasma cell stage
#MMPMID27230497
Schoenhals M
; Jourdan M
; Seckinger A
; Pantesco V
; Hose D
; Kassambara A
; Moreaux J
; Klein B
Cell Cycle
2016[Jul]; 15
(14
): 1919-28
PMID27230497
show ga
A role of the transcription factor Krüppel-like factor 4 (KLF4) in the generation
of mature plasma cells (PC) is unknown. Indeed, KLF4 is critical in controlling
the differentiation of various cell linages, particularly monocytes and
epithelial cells. KLF4 is expressed at low levels in pro-B cells and its
expression increases as they mature into pre-B cells, resting naïve B cells and
memory B cells. We show here that KLF4 is expressed in human bone marrow plasma
cells and its function was studied using an in vitro model of differentiation of
memory B cells into long lived plasma cells. KLF4 is rapidly lost when memory B
cells differentiate into highly cell cycling plasmablasts, poorly cycling early
plasma cells and then quiescent long-lived plasma cells. A forced expression of
KLF4 in plasmablasts enhances the yield of their differentiation into early
plasma cell and long lived plasma cells, by inhibiting apoptosis and upregulating
previously unknown plasma cell pathways.