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miR-137 plays tumor suppressor roles in gastric cancer cell lines by targeting KLF12 and MYO1C

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Tumor Biology

Abstract

Aberrant expression of miR-137 has been reported in many kinds of cancers, but its mechanisms seem to be diversely. In the present study, we compared the expression level of miR-137 in 18 paired gastric cancer (GC) samples and surgical margin (SM) samples by RNA extraction and quantitative real-time PCR (QRT-PCR). Then, we investigated the effects of miR-137 on cell proliferation, cell cycle, and cell migration separately by cell growth counting assay, cell cycle analysis, and transwell assay. Candidate targets of miR-137 were selected by biological information analysis from the intersection of miRDB, Pictar, and TarScan. Finally, mRNA and protein expression level of Krűppel-like factor 12 (KLF12) and Myosin 1C (MYO1C) were tested by QRT-PCR and western blotting assay, followed by the Luciferase reporter assay to investigate the direct interaction between them and miR-137. The results showed that miR-137 was down-regulated in GC samples than in SM samples. The expression level of miR-137 was significantly higher in patients without the vascular embolus than those with vascular embolus. And the overall survival time of patients with high miR-137 expression was longer than those with low miR-137 expression. Over expression of miR-137 could inhibit the cell migration, proliferation, and promote cell cycle arrest in G0/G1 stage in BGC-823 and SGC-7901 cell lines. KLF12 and MYO1C might be the candidate target genes of miR-137 with direct interactions between them and miR-137. In conclusion, miR-137 plays tumor suppressor roles in gastric cancer cell lines by targeting KLF12 and MYO1C.

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Acknowledgment

This work was supported by Ningbo Municipal Natural Science Foundation (Grant Number: 2014A610219).

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Authors and Affiliations

  1. Ningbo Institute of Medical Science, Yang-Shan-Lu, No.42-46, Jiangbei District, Ningbo, China

    Yantao Du, Yichen Chen & Furong Wang

  2. Peking University Cancer Hospital and Institute, Fu-Cheng-Lu, No.52, Haidian District, Beijing, China

    Liankun Gu

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  1. Yantao Du
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Correspondence to Yantao Du.

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Du, Y., Chen, Y., Wang, F. et al. miR-137 plays tumor suppressor roles in gastric cancer cell lines by targeting KLF12 and MYO1C. Tumor Biol. 37, 13557–13569 (2016). https://doi.org/10.1007/s13277-016-5199-3

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  • DOI: https://doi.org/10.1007/s13277-016-5199-3

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