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Long noncoding RNA LINC00673 epigenetically suppresses KLF4 by interacting with EZH2 and DNMT1 in gastric cancer

Ming-Chen Ba1, Hui Long2, Shu-Zhong Cui1

  • 1Intracelom Hyperthermic Perfusion Therapy Center, Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou 510095, P.R. China.

Oncotarget
|December 10, 2017
PubMed

Insights

Long non-coding RNA LINC00673 is highly expressed in gastric cancer (GC) and linked to poor prognosis. Inhibiting LINC00673 suppressed GC cell growth and invasion, suggesting it as a potential therapeutic target.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Long non-coding RNAs (lncRNAs) are increasingly recognized for their roles in cancer.
  • The specific function of LINC00673 in gastric cancer (GC) progression remains largely undefined.

Purpose of the Study:

  • To investigate the role and clinical significance of LINC00673 in gastric cancer.
  • To explore the underlying molecular mechanisms of LINC00673 in GC development.

Main Methods:

  • Quantitative analysis of LINC00673 expression in GC tissues versus normal tissues.
  • Correlation analysis between LINC00673 levels and clinical parameters (metastasis, TNM stage, survival).
  • In vitro experiments involving LINC00673 knockdown in GC cells, including proliferation, migration, and invasion assays.
  • RNA immunoprecipitation (RIP) and chromatin immunoprecipitation (ChIP) assays to elucidate molecular interactions.

Main Results:

  • LINC00673 expression was significantly upregulated in GC tissues and correlated with lymph node metastasis, distant metastasis, and advanced TNM stage.
  • High LINC00673 expression was associated with shorter disease-free survival (DFS) and overall survival (OS), identified as an independent prognostic risk factor.
  • Knockdown of LINC00673 inhibited GC cell proliferation, colony formation, migration, and invasion, reducing PCNA, CyclinD1, and CDK2 expression.
  • LINC00673 was found to suppress KLF4 expression by interacting with EZH2 and DNMT1, thereby promoting GC cell proliferation and invasion.

Conclusions:

  • LINC00673 serves as a potential prognostic biomarker for gastric cancer.
  • LINC00673 plays a crucial role in promoting GC progression by repressing KLF4.
  • LINC00673 represents a promising therapeutic target for gastric cancer treatment.
Keywords:
DNMT1EZH2KLF4LINC00673long noncoding RNA

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