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Hypoxia-associated circDENND2A promotes glioma aggressiveness by sponging miR-625-5p

Hui Su1,2, Defei Zou1,2, Yikun Sun3

  • 11Department of Neurosurgery, Chinese PLA General Hospital, Medical School of Chinese PLA, Beijing, People's Republic of China.

Cellular & Molecular Biology Letters
|April 17, 2019
PubMed
Abstract

Insights

Circular RNAs (circRNAs) like circDENND2A promote glioma cell migration and invasion. circDENND2A acts as a sponge for miR-625-5p, contributing to hypoxia-induced tumor malignancy.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Circular RNAs (circRNAs) are key regulators of gene expression involved in various cellular processes.
  • Aberrant circRNA expression is implicated in tumor development and progression.
  • The specific roles of circRNAs in glioma pathogenesis remain largely unexplored.

Purpose of the Study:

  • To investigate the function of circDENND2A in glioma.
  • To elucidate the mechanism by which circDENND2A influences glioma cell behavior.
  • To determine the relationship between circDENND2A, miR-625-5p, and hypoxia in glioma.

Main Methods:

  • Quantitative real-time PCR (qPCR) for circRNA, miRNA, and mRNA levels.
  • Luciferase reporter and pull-down assays to confirm circRNA-miRNA interaction.
  • Wound healing and Transwell assays to assess cell migration and invasion.
  • Immunohistochemistry to analyze HIF1α expression in glioma tissues.

Main Results:

  • Hypoxia induces circDENND2A expression in glioma cells, promoting their migration and invasion.
  • circDENND2A functions as a molecular sponge for miR-625-5p in glioma.
  • Knockdown of circDENND2A inhibits hypoxia-induced glioma cell migration and invasion.
  • High circDENND2A and low miR-625-5p expression correlate with HIF1α overexpression in glioma tissues.

Conclusions:

  • circDENND2A is essential for hypoxia-induced glioma cell malignancy.
  • circDENND2A promotes glioma progression by sponging miR-625-5p.
  • circDENND2A represents a potential therapeutic target in glioma.
Keywords:
GliomaHypoxiaInvasionMigrationcircDENND2AmiR-625-5p

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