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CircPTK2 Suppresses the Progression of Gastric Cancer by Targeting the MiR-196a-3p/AATK Axis

Ling Gao1, Tingting Xia2, Mingde Qin3

  • 1Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou, China.

Frontiers in Oncology
|October 4, 2021
PubMed
Abstract

Insights

Circular RNA PTK2 (circPTK2) acts as a tumor suppressor in gastric cancer. It inhibits cancer cell proliferation, migration, and invasion by regulating the miR-196a-3p/AATK pathway, offering a potential therapeutic target.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Gastric cancer is a leading cause of cancer mortality worldwide.
  • Circular RNAs (circRNAs) are implicated in cancer progression by sponging microRNAs (miRNAs).
  • The specific roles of most circRNAs in gastric cancer remain unclear.

Purpose of the Study:

  • To investigate the function and mechanism of circPTK2 in gastric cancer.
  • To explore the potential of circPTK2 as a therapeutic target for gastric cancer.

Main Methods:

  • Bioinformatics analysis and RT-qPCR to identify and validate circPTK2.
  • Dual-luciferase reporter and RNA pull-down assays to confirm molecular interactions.
  • In vitro cell assays and in vivo xenograft mouse models to assess tumor suppression.

Main Results:

  • circPTK2 expression was significantly downregulated in gastric cancer tissues and cells.
  • Overexpression of circPTK2 suppressed gastric cancer cell proliferation, migration, and invasion.
  • circPTK2 acts as a sponge for miR-196a-3p, inhibiting its ability to repress AATK expression.
  • circPTK2 overexpression inhibited tumor growth in a mouse model.

Conclusions:

  • circPTK2 functions as a tumor suppressor in gastric cancer.
  • The circPTK2/miR-196a-3p/AATK axis is a key regulatory pathway in gastric cancer.
  • circPTK2 represents a promising novel therapeutic target for gastric cancer treatment.
Keywords:
AATKcircPTK2gastric cancermiR-196a-3pproliferation

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