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An In Vitro Protocol for Evaluating MicroRNA Levels, Functions, and Associated Target Genes in Tumor Cells
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miR-211 promotes non-small cell lung cancer proliferation by targeting SRCIN1

Leiguang Ye1, Hui Wang1, Baogang Liu2

  • 1Department of Pulmonary Medicine, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang, China, 150040.

Tumour Biology : the Journal of the International Society for Oncodevelopmental Biology and Medicine
|August 17, 2015
PubMed

Insights

MicroRNAs (miRNAs) are key in lung cancer. This study shows miR-211 is upregulated in non-small cell lung cancer (NSCLC), promoting tumor growth and invasion by targeting SRCIN1.

Area of Science:

  • Molecular Biology
  • Oncology

Background:

  • MicroRNAs (miRNAs) are small non-coding RNAs implicated in cancer development.
  • Dysregulation of miRNAs contributes to the initiation and progression of human cancers, including lung cancer.

Purpose of the Study:

  • To investigate the role of miR-211 in human non-small cell lung cancer (NSCLC).
  • To identify potential targets of miR-211 and elucidate its oncogenic mechanisms in NSCLC.

Main Methods:

  • Quantitative real-time PCR (qRT-PCR) to measure miR-211 expression in NSCLC cell lines and tissues.
  • Functional assays including cell proliferation, cell cycle, colony formation, and invasion assays.
  • Luciferase reporter assay to identify direct targets of miR-211.

Main Results:

  • miR-211 expression was significantly upregulated in NSCLC cell lines and tissues.
  • Overexpression of miR-211 promoted NSCLC cell proliferation, colony formation, and invasion.
  • SRC kinase signaling inhibitor 1 (SRCIN1) was identified as a direct target of miR-211, and its silencing enhanced proliferation while its expression was downregulated in NSCLC.

Conclusions:

  • miR-211 acts as an oncogenic miRNA in NSCLC, partly through the regulation of SRCIN1.
  • Targeting miR-211 may represent a potential therapeutic strategy for NSCLC patients.
Keywords:
MiR-211MicroRNANon-small cell lung cancerSRCIN1

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