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miR-378 suppresses the proliferation, migration and invasion of colon cancer cells by inhibiting SDAD1
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miR-378 suppresses the proliferation, migration and invasion of colon cancer cells by inhibiting SDAD1
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Journal Article
miR-378 suppresses the proliferation, migration and invasion of colon cancer cells by inhibiting SDAD1
2017
Overview
Background
MicroRNAs (miRNAs) play important roles in the growth and metastasis of colon cancer. It is known that one set of miRNAs are dysregulated in colon cancer cells, but the mechanism of their role in cancer development is still largely unknown. Our study focuses on the role of miR-378 in colon cancer cells.
Methods
Human colon cancer tissues and adjacent non-tumor tissues were collected from patients diagnosed in pathological examinations. In addition, human colon cancer cell lines LoVo, CaCo2, SW1116, SW480 and HCT-116, and a normal colonic mucosa cell line NCM460 were included. Quantitative RT-PCR was used to detect the miR-378 level in the clinical tissues and cell lines. In SW480 and HCT-116, miR-378 was artificially overexpressed or suppressed. Cell viability and proliferation were measured using MTT and colony formation assays, and apoptosis was detected via annexin V-PI staining and flow cytometry analysis. The transwell technique was applied to detect the migration and invasion of the colon cancer cells, and their epithelial–mesenchymal transition (EMT) was evaluated by detecting EMT-associated markers using Western blotting. Bioinformatics methods were used to predict the potential targets of miR-378, and luciferase reporter assays were performed to conform the direct binding between miR-378 and its target mRNA. The activity of the Wnt/β-catenin pathway was evaluated by detecting the key factors through Western blotting.
Results
We found that miR-378 expression was low in colon cancer tissues and cell lines. Overexpression of miR-378 not only inhibits the proliferation of colon cancer cells in vitro by inducing apoptosis, but also inhibits migration and invasion by inhibiting the EMT of colon cancer cells. SDAD1 is a direct target gene of miR-378, and knockdown of SDAD1 suppresses the proliferation, migration and invasion of colon cancer cells. We also confirmed that miR-378 alleviated the malignant phenotypes of colon cancer cells by inhibiting the Wnt/β-catenin pathway.
Conclusion
miR-378 inhibits the proliferation, migration and invasion of colon cancer cells by targeting SDAD1, defining miR-378 as a potential target for the diagnosis and treatment of colon cancer.
Publisher
BioMed Central,Springer Nature B.V,BMC
Subject
/ Biological and Medical Physics
/ Biomedical and Life Sciences
/ Cell Cycle Proteins - antagonists & inhibitors
/ Cell Cycle Proteins - genetics
/ Colonic Neoplasms - genetics
/ Colonic Neoplasms - metabolism
/ Colonic Neoplasms - pathology
/ Colonic Neoplasms - physiopathology
/ Enzymes
/ Gene Expression Regulation, Neoplastic
/ Genes
/ Humans
/ Invasion
/ miR-378
/ miRNA
/ mRNA
/ Mutation
/ Nuclear Proteins - antagonists & inhibitors
/ Proteins
/ SDAD1
