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Updated: Jun 11, 2026

Establishing Cell Lines Overexpressing DR3 to Assess the Apoptotic Response to Anti-mitotic Therapeutics
12:28

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Published on: January 11, 2019

Dcr3 inhibit p53-dependent apoptosis in gamma-irradiated lung cancer cells

Hye Youn Sung1, Hong-Gyun Wu, Jung-Hyuck Ahn

  • 1Department of Biomedical Sciences, Biochemistry and Molecular Biology, Seoul National University College of Medicine, Seoul, Korea.

International Journal of Radiation Biology
|July 6, 2010
PubMed
Abstract

Insights

Decoy receptor 3 (Dcr3) expression is higher in radioresistant lung cancer cells and influences cell survival. Dcr3, along with p53-dependent apoptosis, regulates cellular response to ionizing radiation.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Lung cancer cell line radiosensitivity varies significantly.
  • Understanding the genetic basis of radioresistance is crucial for effective cancer therapy.

Purpose of the Study:

  • To identify genes associated with radiosensitivity in lung cancer.
  • To compare gene expression profiles between radioresistant (H1299) and radiosensitive (H460) lung cancer cell lines.

Main Methods:

  • Microarray analysis to assess mRNA profiles.
  • Quantitative real-time PCR (qRT-PCR) and Western blot for gene expression validation.
  • Clonogenic assay to measure cellular radioresistance.

Main Results:

  • Decoy receptor 3 (Dcr3) expression was significantly higher in radioresistant cell lines compared to radiosensitive ones.
  • Overexpression of Dcr3 enhanced survival in radiosensitive cells, while Dcr3 knockdown reduced radioresistance.
  • Dcr3's role in radioresistance is p53-dependent, involving the Fas-mediated apoptosis pathway.

Conclusions:

  • Dcr3 expression is a key regulator of cellular response to ionizing radiation in lung cancer.
  • The p53-dependent apoptosis signaling pathway, influenced by Dcr3, plays a critical role in radiosensitivity.

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