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2017 ; 8
(12
): 3213
Nephropedia Template TP
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MicroRNA-105 is involved in TNF-?-related tumor microenvironment enhanced
colorectal cancer progression
#MMPMID29238068
Shen Z
; Zhou R
; Liu C
; Wang Y
; Zhan W
; Shao Z
; Liu J
; Zhang F
; Xu L
; Zhou X
; Qi L
; Bo F
; Ding Y
; Zhao L
Cell Death Dis
2017[Dec]; 8
(12
): 3213
PMID29238068
show ga
TNF-? is a central proinflammatory cytokine contributing to malignant tumor
progression in tumor microenvironment. In this study, we found the upregulation
of miR-105 in colorectal cancer was associated with aggressive phenotype, and the
enhanced expression of miR-105 was required for TNF-?-induced
epithelial-mesenchymal transition (EMT). The expression of miR-105 was remarkably
stimulated by TNF-? in a time-dependent manner using real-time qPCR analysis.
Inhibition of miR-105 remarkably weakened the aggressive effects of TNF-? through
preventing the activation of NF-?B signaling and the initiation of EMT.
Furthermore, miR-105 was demonstrated directly targeted on the 3'-UTRs of RAP2C,
a Rap2 subfamily of small GTP-binding protein. Consistently, suppression of RAP2C
stimulated the role of miR-105, which dramatically promoted the invasion and
metastasis of CRC cells. Thalidomide, a TNF-? and NF-?B inhibitor, significantly
weakened the metastasis and homing capacity of miR-105-overexpressed CRC cells in
nude mice. Our investigation initiatively illustrated the modulatory role of
miR-105 in TNF-?-induced EMT and further CRC metastasis. We also offer a better
understanding of TNF?-induced metastasis and suggest an effective therapeutic
strategy against CRC metastasis.