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MicroRNA-30a-5p (miR-30a) regulates cell motility and EMT by directly targeting oncogenic TM4SF1 in colorectal cancer

Y R Park1,2, S L Kim1,2, M R Lee2,3

  • 1Department of Internal Medicine, Chonbuk National University Hospital, Chonbuk National University Medical School, Jeonju, Republic of Korea.

Journal of Cancer Research and Clinical Oncology
|May 22, 2017
PubMed
Abstract

Insights

MicroRNA-30a (miR-30a) is downregulated in colorectal cancer (CRC), inhibiting metastasis by targeting TM4SF1. Restoring miR-30a may offer a new therapeutic strategy for CRC patients.

Area of Science:

  • Oncology
  • Molecular Biology
  • Gene Regulation

Background:

  • Colorectal cancer (CRC) is a major global health concern.
  • MicroRNAs (miRNAs) are key regulators of gene expression in cancer development.
  • The specific role of microRNA-30a-5p (miR-30a) in CRC remains largely unelucidated.

Purpose of the Study:

  • To investigate the function of miR-30a in colorectal cancer.
  • To identify the molecular mechanisms underlying miR-30a's role in CRC progression.
  • To explore miR-30a as a potential therapeutic target for CRC.

Main Methods:

  • Quantitative reverse transcription-polymerase chain reaction (qRT-PCR) to assess miR-30a and TM4SF1 expression.
  • Cell migration and invasion assays (wound healing, trans-well) to evaluate CRC cell behavior.
  • Luciferase reporter assays and bioinformatics to validate TM4SF1 as a miR-30a target.
  • Western blotting and immunohistochemistry to analyze EMT regulators (E-cadherin, VEGF).

Main Results:

  • miR-30a was significantly downregulated in CRC tissues and cell lines, inversely correlated with advanced stage and lymph node metastasis.
  • Overexpression of miR-30a suppressed CRC cell migration and invasion.
  • miR-30a directly targeted and downregulated TM4SF1 expression.
  • miR-30a modulated the expression of EMT markers, decreasing VEGF and increasing E-cadherin.

Conclusions:

  • miR-30a acts as a tumor suppressor in CRC by inhibiting cell migration and invasion.
  • miR-30a regulates key metastatic factors including TM4SF1, VEGF, and E-cadherin.
  • miR-30a represents a promising therapeutic target for mitigating colorectal cancer lymph node metastasis.
Keywords:
Colorectal cancerMetastasisTransmembrane-4-L-six-family protein 1miR-30a

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