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Oncogenic microRNA-411 promotes lung carcinogenesis by directly targeting suppressor genes SPRY4 and TXNIP

Caiyan Zhang1, Huimin Wang1, Xiaomin Liu2

  • 1Lab for Noncoding RNA and Cancer, School of Life Sciences, Shanghai University, Shanghai, 200444, China.

Oncogene
|November 4, 2018
PubMed

Insights

MicroRNAs miR-411-5p/3p accelerate non-small cell lung cancer (NSCLC) growth by targeting SPRY4 and TXNIP. This miR-411-SPRY4-AKT pathway presents a potential therapeutic target for NSCLC.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Lung cancer is a leading global malignancy, with non-small cell lung cancer (NSCLC) comprising 85% of cases.
  • MicroRNAs (miRNAs) are crucial regulators in cancer development, including lung cancer.
  • Elevated levels of miR-411-5p/3p have been observed in NSCLC tissues and cell lines.

Purpose of the Study:

  • To investigate the role of miR-411-5p/3p in NSCLC progression.
  • To identify the molecular targets and signaling pathways regulated by miR-411-5p/3p in NSCLC.

Main Methods:

  • Analysis of miR-411-5p/3p expression in NSCLC tissues and cell lines.
  • In vitro assays to assess the effects of miR-411-5p/3p on cell proliferation, migration, and apoptosis.
  • In vivo studies using mouse models to evaluate tumor growth.
  • Western blotting and other molecular techniques to confirm target genes and signaling pathway activation.

Main Results:

  • Overexpression of miR-411-5p/3p enhanced NSCLC cell proliferation and migration while inhibiting apoptosis.
  • SPRY4 was identified as a direct target of miR-411-5p/3p, with its expression significantly decreased in tumors.
  • miR-411-5p/3p promoted tumor growth in vivo, activated EGFR and AKT signaling, and induced epithelial-mesenchymal transition (EMT).
  • miR-411-5p also targeted the tumor suppressor TXNIP, influencing cell cycle progression in a cell-specific manner.

Conclusions:

  • miR-411-5p/3p play a critical role in NSCLC development by downregulating SPRY4 and TXNIP.
  • The miR-411-SPRY4-AKT signaling axis represents a promising therapeutic target for NSCLC treatment.

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