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Long noncoding RNA FER1L4 suppresses cancer cell growth by acting as a competing endogenous RNA and regulating PTEN

Tian Xia1, Shengcan Chen1, Zhen Jiang1

  • 1Department of Biochemistry and Molecular Biology, Zhejiang Key Laboratory of Pathophysiology, Ningbo University School of Medicine, Ningbo, Zhejiang, 315211, China.

Scientific Reports
|August 27, 2015
PubMed

Insights

The long noncoding RNA FER1L4 acts as a tumor suppressor in gastric cancer by regulating PTEN. Its downregulation releases miR-106a-5p, promoting cancer cell proliferation.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Aberrant expression of long noncoding RNAs (lncRNAs) is linked to various cancers, but their specific roles in pathogenesis remain largely unknown.
  • Gastric cancer is a significant global health concern, necessitating a deeper understanding of its molecular underpinnings.

Purpose of the Study:

  • To investigate the role of the long noncoding RNA FER1L4 in gastric cancer.
  • To elucidate the molecular mechanism by which FER1L4 influences gastric cancer progression, specifically its interaction with microRNA-106a-5p and the tumor suppressor gene PTEN.

Main Methods:

  • Quantitative real-time PCR to measure FER1L4 and PTEN mRNA levels in gastric cancer tissues.
  • Bioinformatic analysis and luciferase reporter assays to confirm the interaction between FER1L4, miR-106a-5p, and PTEN.
  • Cell cycle analysis to assess the impact of FER1L4 on cell proliferation.

Main Results:

  • FER1L4 was found to be downregulated in gastric cancer tissues, with its expression correlating positively with PTEN mRNA levels.
  • FER1L4 functions as a competing endogenous RNA (ceRNA) by sponging miR-106a-5p, thereby increasing PTEN expression.
  • Downregulation of FER1L4 led to increased cell proliferation by promoting the G0/G1 to S phase transition, indicating a tumor-suppressive role.

Conclusions:

  • The lncRNA FER1L4 acts as a ceRNA regulating PTEN expression via miR-106a-5p in gastric cancer.
  • FER1L4 downregulation contributes to gastric tumorigenesis by inhibiting PTEN and promoting cell proliferation.
  • lncRNAs can function as ceRNAs for tumor suppressor mRNAs, representing a potential therapeutic target in cancer.

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