Effect of the miR‑96‑5p inhibitor and mimic on the migration and invasion of the SW480‑7 colorectal cancer cell line

He,Pei   Yuan; Yip,Wai  Kien; Jabar,Mohd   Faisal; Mohtarrudin,Norhafizah; Dusa,Noraini   Mohd; Seow,Heng   Fong

doi:10.3892/ol.2019.10492

Effect of the miR‑96‑5p inhibitor and mimic on the migration and invasion of the SW480‑7 colorectal cancer cell line

Authors:
- Pei Yuan He
- Wai Kien Yip
- Mohd Faisal Jabar
- Norhafizah Mohtarrudin
- Noraini Mohd Dusa
- Heng Fong Seow
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Affiliations: Department of Gastroenterology, Affiliated Hospital of Chengde Medical University, Chengde, Hebei 067000, P.R. China, Department of Pathology, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia, Department of Surgery, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia, Department of Pathology, Hospital Kuala Lumpur Jalan Pahang, Kuala Lumpur 50586, Malaysia
Published online on: June 18, 2019 https://doi.org/10.3892/ol.2019.10492
Pages: 1949-1960

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Abstract

The objectives of the present study were to identify the aberrant expression of microRNA (miRNA) in colorectal carcinoma (CRC) tissues from published miRNA profiling studies and to investigate the effects of the identified miRNA inhibitor and mimic miR‑96‑5p on CRC cell migration and invasion. The altered expression of the regulators of cytoskeleton mRNA in miR‑96‑5p inhibitor‑transfected cells was determined. The miR‑96‑5p expression level in five CRC cell lines, HCT11, CaCo2, HT29, SW480 and SW620, and 26 archived paraffin‑embedded CRC tissues were also investigated by reverse‑transcriptase quantitative polymerase chain reaction (RT‑qPCR). Cell viability in response to the miR‑96‑5p inhibitor and mimic transfections was determined by an MTT assay. A Matrigel invasion assay was conducted to select the invasive subpopulation designated SW480‑7, by using the parental cell line SW480. The effects of miR‑96‑5p mimic‑ or inhibitor‑transfected SW480‑7 cells on cell migration and invasion were evaluated using the Transwell and Matrigel assays, and the change in expression of the regulators of cytoskeleton mRNAs was identified by Cytoskeleton Regulators RT2‑Profiler PCR array followed by validation with RT‑qPCR. CRC tissues exhibited a significant increase in miR‑96‑5p expression, compared with their matched normal adjacent tissues, indicating an oncogenic role for miR‑96‑5p. The results demonstrated that the miR‑96‑5p inhibitor decreased the migration of SW480‑7 cells, but had no effect on invasion. This may be due to the promotion of cell invasion by Matrigel, which counteracts the blockade of cell invasion by the miR‑96‑5p inhibitor. The miR‑96‑5p mimic enhanced SW480‑7 cell migration and invasion, as expected. It was determined that there was a >2.5 fold increase in the expression of genes involved in cytoskeleton regulation, myosin light chain kinase 2, pleckstrin homology like domain family B member 2, cyclin A1, IQ motif containing GTPase activating protein 2, Brain‑specific angiogenesisinhibitor 1‑associated protein 2 and microtubule‑actin crosslinking factor 1, in miR‑96‑5p inhibitor‑transfected cells, indicating that they are negative regulators of cell migration. In conclusion, the miR‑96‑5p inhibitor blocked cell migration but not invasion, and the latter may be due to the counteraction of Matrigel, which has been demonstrated to stimulate cell invasion.

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