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Epigenetic repression of PDZ-LIM domain-containing protein 2 promotes ovarian cancer via NOS2-derived nitric oxide

Linjie Zhao1,2, Chuan Yu1,2, Shengtao Zhou1,2

  • 1Department of Gynecology and Obstetrics, Key Laboratory of Obstetrics & Gynecologic and Pediatric Diseases and Birth Defects of Ministry of Education, West China Second Hospital, Chengdu, China.

Oncotarget
|November 24, 2015
PubMed

Insights

PDLIM2 protein is decreased in ovarian cancer, and its repression promotes tumor growth through nitric oxide signaling and M2 macrophage recruitment. This suggests PDLIM2 as a potential therapeutic target for ovarian cancer.

Area of Science:

  • Oncology
  • Molecular Biology
  • Immunology

Background:

  • Ovarian cancer is a leading cause of gynecological cancer deaths with limited therapeutic options.
  • Understanding molecular mechanisms is vital for developing targeted ovarian cancer therapies.
  • PDLIM2's role in inflammation via p65 ubiquitination is known, but its function in ovarian cancer is unexplored.

Purpose of the Study:

  • To investigate the role of PDLIM2 in ovarian cancer pathogenesis.
  • To explore PDLIM2's potential as a therapeutic target for ovarian cancer.

Main Methods:

  • Comparative analysis of PDLIM2 expression in ovarian cancer tissues/cell lines versus normal ovarian cells.
  • Investigation of PDLIM2's epigenetic regulation in ovarian cancer.
  • In vivo and in vitro functional studies assessing the impact of PDLIM2 inhibition on ovarian cancer growth.
  • Analysis of nitric oxide signaling and M2 macrophage recruitment.

Main Results:

  • PDLIM2 expression is significantly decreased in ovarian high-grade serous carcinoma and ovarian cancer cell lines compared to normal ovarian tissues and HOSE cells.
  • PDLIM2 is epigenetically repressed during ovarian cancer development.
  • Inhibition of PDLIM2 accelerates ovarian cancer growth in vivo and in vitro.
  • PDLIM2 inhibition promotes tumor growth via NOS2-derived nitric oxide signaling and M2 macrophage recruitment.

Conclusions:

  • PDLIM2 plays a crucial role in ovarian cancer pathogenesis.
  • Epigenetic repression of PDLIM2 contributes to ovarian cancer progression.
  • PDLIM2 inhibition promotes ovarian cancer growth by modulating nitric oxide signaling and macrophage recruitment, highlighting its potential as a therapeutic target.
Keywords:
DNA methylationNOS2PDLIM2nitric oxide signalingovarian cancer

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