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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Am+J+Cancer+Res
2015 ; 5
(4
): 1447-59
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SP1-mediated microRNA-520d-5p suppresses tumor growth and metastasis in
colorectal cancer by targeting CTHRC1
#MMPMID26101709
Yan L
; Yu J
; Tan F
; Ye GT
; Shen ZY
; Liu H
; Zhang Y
; Wang JF
; Zhu XJ
; Li GX
Am J Cancer Res
2015[]; 5
(4
): 1447-59
PMID26101709
show ga
Recent evidence suggests that miR-520 family has an important role in regulating
tumorigenesis and development of various types of solid cancers. However, as one
of the most common cancers in the world, there is little known about the
underlying regulatory mechanisms of miR-520 in colorectal cancer (CRC). In the
present study, we investigated the expression of microRNA-520d-5p (miR-520d-5p)
in CRC specimens and then explored its potential role and mechanism in CRC
progression. We found that miR-520d-5p was markedly down-regulated in CRC
clinical specimens compared with adjacent normal tissues by real-time PCR.
Dual-luciferase assays confirmed that miR-520d-5p directly targeting CTHRC1 and
SP1 transactivate miR-520d-5p by binding to its upstream promoter region. The
biological functional experiments showed that ectopic re-expression of
miR-520d-5p suppressed CRC cell proliferation, migration and invasion, whereas
the inhibition of miR-520d-5p displayed an inverse effect in vitro and in vivo.
Western blot shown that miR-520d-5p abrogated the epithelial-mesenchymal
transition by inactivating the phosphorylation of Erk1/2. In conclusion, our
findings indicate that miR-520d-5p is significantly down-expressed and involved
in CRC progression and metastasis by targeting CTHRC1 and regulated by SP1, which
provide new support for miR-520d-5p maybe as a novel anti-onco molecular target
for the treatment of CRC in the future.