BACKGROUND We explored the regulatory effects of
long noncoding RNA (
lncRNA) LOC101060264 silencing mediated by
shRNA on invasion and
metastasis of human
colon cancer. MATERIAL AND METHODS Initially, 2
shRNA plasmids for LOC101060264 silencing - shRNA1 and shRNA2 - were introduced into LoVo cells. Following transfection, the expressions of LOC101060264,
E-cadherin, and
vimentin were determined. Next, to explore the regulatory effects of LOC101060264 silencing on cell growth, cell cycle, invasion, and migration abilities of LoVo cells, we performed MTT, flow cytometry, Transwell assay, and scratch assay, respectively. Furthermore, in nude mice with xenografted
tumors, the
tumor volume and weight were measured, and the expressions of
PCNA,
E-cadherin,
vimentin, and MMP-9 in
tumor tissues were determined by immunohistochemistry. RESULTS The level of
E-cadherin increased and the level of
vimentin decreased after LOC101060264 silencing mediated by shRNA1 and shRNA2 in LoVo cells. Silencing LOC101060264 repressed the migration, invasion, and proliferation of LoVo cells in vitro and inhibited
tumor growth in nude mice in vivo. We also studied the expression of these
proteins and found reduced expression of
PCNA,
vimentin, and MMP-9
protein, and found enhanced expression of
E-cadherin protein. Moreover, the inhibitory effect of shRNA2 on the above cell behaviors was stronger than that of shRNA1. CONCLUSIONS In summary, LOC101060264 silencing decreased LoVo cell invasiveness via suppressing ETM and attenuated
tumor metastasis, which provides a novel therapeutic target for patients with
colon cancer.