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LINC00312 Inhibits Lung Cancer Progression through the miR-3175/SEMA6A Axis

Xiangli Zhang1, Qian Zhang2, Ting Li3

  • 1Department of Respiratory and Critical Care, Shaanxi Provincial People's Hospital, Xi'an City 710068, China.

Critical Reviews in Eukaryotic Gene Expression
|February 3, 2023
PubMed

Insights

Long non-coding RNA LINC00312 acts as a tumor suppressor in lung cancer, inhibiting cell proliferation, migration, and invasion. It functions through the miR-3175/SEMA6A pathway, offering potential therapeutic targets for lung cancer.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Lung cancer remains a leading cause of cancer-related mortality worldwide.
  • Understanding the molecular mechanisms underlying lung cancer progression is crucial for developing effective therapies.
  • Long non-coding RNAs (lncRNAs) are increasingly recognized for their roles in various cancers, including lung cancer.

Purpose of the Study:

  • To elucidate the molecular mechanisms and tumor-associated functions of LINC00312 in lung cancer.
  • To investigate the regulatory network involving LINC00312, microRNA (miRNA), and messenger RNA (mRNA) in lung cancer.
  • To assess the impact of LINC00312 on lung cancer cell behavior and tumor growth.

Main Methods:

  • Acquisition of lung cancer expression data from the Gene Expression Omnibus (GEO) database.
  • Bioinformatic prediction and experimental validation (dual-luciferase and RIP assays) of miRNA-lncRNA and miRNA-mRNA interactions.
  • Western blot analysis of epithelial-mesenchymal transition (EMT)-related proteins.
  • In vitro assays (CCK-8, Transwell) and in vivo xenograft experiments to evaluate cell proliferation, migration, invasion, and tumor growth.

Main Results:

  • LINC00312 was found to be downregulated in lung cancer cells, acting as a tumor suppressor.
  • RIP assays confirmed that miR-3175 binds to both LINC00312 and SEMA6A.
  • Dual-luciferase assays demonstrated that miR-3175 directly targets SEMA6A, suppressing its expression. Overexpression of LINC00312 inhibited the miR-3175/SEMA6A interaction.
  • Overexpression of LINC00312 suppressed lung cancer cell proliferation, migration, and invasion, effects that were diminished by miR-3175 overexpression or SEMA6A silencing.

Conclusions:

  • LINC00312 inhibits lung cancer occurrence and progression.
  • The tumor-suppressive function of LINC00312 is mediated through the miR-3175/SEMA6A axis.
  • LINC00312 represents a potential therapeutic target for lung cancer treatment.

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