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2017 ; 8
(10
): 16633-16641
Nephropedia Template TP
gab.com Text
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English Wikipedia
microRNA-375 inhibits colorectal cancer cells proliferation by downregulating
JAK2/STAT3 and MAP3K8/ERK signaling pathways
#MMPMID28186962
Wei R
; Yang Q
; Han B
; Li Y
; Yao K
; Yang X
; Chen Z
; Yang S
; Zhou J
; Li M
; Yu H
; Yu M
; Cui Q
Oncotarget
2017[Mar]; 8
(10
): 16633-16641
PMID28186962
show ga
MicroRNA-375 is involved in many types of alimentary system cancers. Our previous
studies showed that microRNA-375 was significantly down-regulated in carcinoma
tissues compared with para-carcinoma tissues, which strongly indicates that
microRNA-375 might suppress the occurrence and development of colorectal cancer.
However, the mechanism underlying the microRNA-375 regulation in colorectal
cancer remains unclear. In this study, we first sorted out jak2, map3k8 and atg7
as microRNA-375 targeted genes from multiple databases, and found that jak2,
map3k8 and their downstream genes stat3 and erk were up-regulated in carcinoma
tissues. Secondly, we over-expressed microRNA-375 in colorectal cancer cell lines
(HCT116, Caco2 and HT29). Our results showed that in microRNA-375 over-expressing
cells, JAK2/STAT3 and MAP3K8/ERK proteins were down-regulated, cell proliferation
was inhibited, cell migration rate did not change. There was no significant
difference on ATG7 expression between the control group and microRNA-375
over-expressing HT29/Caco2 cells, whereas microRNA-375 down-regulated ATG7
specifically in HCT116 cells. Finally, we demonstrated that expressing
microRNA-375 suppressed tumor formation in nude mice. In conclusion, microRNA-375
might function as a tumor-repressive gene to inhibit cell proliferation, mainly
through targeting both JAK2/STAT3 and MAP3K8/ERK signaling pathways in colorectal
cancer. These findings suggest miR-375 as a promising diagnostic marker and a
therapeutic drug for colorectal cancer.