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2017 ; 24
(3
): 445-457
Nephropedia Template TP
gab.com Text
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English Wikipedia
MicroRNA-29c-5p suppresses gallbladder carcinoma progression by directly
targeting CPEB4 and inhibiting the MAPK pathway
#MMPMID28060377
Shu YJ
; Bao RF
; Jiang L
; Wang Z
; Wang XA
; Zhang F
; Liang HB
; Li HF
; Ye YY
; Xiang SS
; Weng H
; Wu XS
; Li ML
; Hu YP
; Lu W
; Zhang YJ
; Zhu J
; Dong P
; Liu YB
Cell Death Differ
2017[Mar]; 24
(3
): 445-457
PMID28060377
show ga
Gallbladder cancer (GBC) is a leading cause of cancer-related deaths worldwide,
and its prognosis remains poor, with a 5-year survival rate of ~5%. Given the
crucial role of microRNAs (miRNAs) in cancer metastasis, we aimed to analyze the
expression and function of the metastasis-associated miRNA miR-29c-5p in GBC.We
validated that expression of miR-29c-5p was significantly downregulated in GBC
and was closely associated with lymph node metastasis, overall survival and
disease-free survival in 40 GBC patients who were followed clinically. Ectopic
overexpression of miR-29c-5p dramatically repressed proliferation, metastasis,
and colony formation and induced apoptosis in vitro, and it suppressed
tumorigenicity in vivo through the MAPK pathway. Cytoplasmic polyadenylation
element binding protein 4 (CPEB4) was identified as a critical effector target of
miR-29c-5p. Enforced expression of miR-29c-5p significantly inhibited the
expression of CPEB4, and restoration of CPEB4 expression reversed the inhibitory
effects of miR-29c-5p on GBC cell proliferation and metastasis. Transforming
growth factor-? (TGF-?) upregulated CPEB4 by downregulating miR-29c-5p, leading
to MAPK pathway activation. In conclusion, the TGF-?/miR-29c-5p/CPEB4 axis has a
pivotal role in the pathogenesis and poor prognosis of GBC, suggesting that
miR-29c-5p is a tumor-suppressive miRNA that may serve as potential prognostic
biomarker or therapeutic target for GBC.