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2016 ; 15
(7
): 1493-1504
Nephropedia Template TP
gab.com Text
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Direct Upregulation of STAT3 by MicroRNA-551b-3p Deregulates Growth and
Metastasis of Ovarian Cancer
#MMPMID27160903
Chaluvally-Raghavan P
; Jeong KJ
; Pradeep S
; Silva AM
; Yu S
; Liu W
; Moss T
; Rodriguez-Aguayo C
; Zhang D
; Ram P
; Liu J
; Lu Y
; Lopez-Berestein G
; Calin GA
; Sood AK
; Mills GB
Cell Rep
2016[May]; 15
(7
): 1493-1504
PMID27160903
show ga
3q26.2 amplification in high-grade serous ovarian cancer leads to increased
expression of mature microRNA miR551b-3p, which is associated with poor clinical
outcome. Importantly, miR551b-3p contributes to resistance to apoptosis and
increased survival and proliferation of cancer cells in vitro and in vivo.
miR551b-3p upregulates STAT3 protein levels, and STAT3 is required for the
effects of miR551b-3p on cell proliferation. Rather than decreasing levels of
target mRNA as expected, we demonstrate that miR551b-3p binds a complementary
sequence on the STAT3 promoter, recruiting RNA polymerase II and the TWIST1
transcription factor to activate STAT3 transcription, and thus directly
upregulates STAT3 expression. Furthermore, anti-miR551b reduced STAT3 expression
in ovarian cancer cells in vitro and in vivo and reduced ovarian cancer growth
in vivo. Together, our data demonstrate a role for miR551b-3p in transcriptional
activation. Thus, miR551b-3p represents a promising candidate biomarker and
therapeutic target in ovarian cancer.
|*Gene Expression Regulation, Neoplastic
[MESH]
|Animals
[MESH]
|Carcinoma, Ovarian Epithelial
[MESH]
|Cell Line, Tumor
[MESH]
|Cell Proliferation/genetics
[MESH]
|Cell Self Renewal
[MESH]
|Cell Survival/genetics
[MESH]
|Down-Regulation/genetics
[MESH]
|Female
[MESH]
|Gene Amplification
[MESH]
|Gene Knockdown Techniques
[MESH]
|Gene Silencing
[MESH]
|Humans
[MESH]
|Mice, Nude
[MESH]
|MicroRNAs/*metabolism
[MESH]
|Neoplasm Metastasis
[MESH]
|Neoplasms, Glandular and Epithelial/*genetics/*pathology
[MESH]