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2015 ; 5
(ä): 16229
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ZFP36L1 promotes monocyte/macrophage differentiation by repressing CDK6
#MMPMID26542173
Chen MT
; Dong L
; Zhang XH
; Yin XL
; Ning HM
; Shen C
; Su R
; Li F
; Song L
; Ma YN
; Wang F
; Zhao HL
; Yu J
; Zhang JW
Sci Rep
2015[Nov]; 5
(ä): 16229
PMID26542173
show ga
RNA binding proteins (RBPs)-mediated post-transcriptional control has been
implicated in influencing various aspects of RNA metabolism and playing important
roles in mammalian development and pathological diseases. However, the functions
of specific RBPs and the molecular mechanisms through which they act in
monocyte/macrophage differentiation remain to be determined. In this study,
through bioinformatics analysis and experimental validation, we identify that
ZFP36L1, a member of ZFP36 zinc finger protein family, exhibits significant
decrease in acute myeloid leukemia (AML) patients compared with normal controls
and remarkable time-course increase during monocyte/macrophage differentiation of
PMA-induced THP-1 and HL-60 cells as well as induction culture of CD34(+)
hematopoietic stem/progenitor cells (HSPCs). Lentivirus-mediated gain and loss of
function assays demonstrate that ZFP36L1 acts as a positive regulator to
participate in monocyte/macrophage differentiation. Mechanistic investigation
further reveals that ZFP36L1 binds to the CDK6 mRNA 3'untranslated region bearing
adenine-uridine rich elements and negatively regulates the expression of CDK6
which is subsequently demonstrated to impede the in vitro monocyte/macrophage
differentiation of CD34(+) HSPCs. Collectively, our work unravels a
ZFP36L1-mediated regulatory circuit through repressing CDK6 expression during
monocyte/macrophage differentiation, which may also provide a therapeutic target
for AML therapy.