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[Apoptosis of human gastric cancer cells induced by bcl-2 antisense oligodeoxynucleotides]

P Lu1, J Chen

  • 1First Affiliated Hospital, China Medical University, Shenyang 110001.

Zhonghua Zhong Liu Za Zhi [Chinese Journal of Oncology]
|January 5, 2002
PubMed
Abstract

Insights

Antisense oligodeoxynucleotides (AS-ODNs) targeting the bcl-2 gene effectively reduced gene expression and induced apoptosis in human gastric cancer cells, offering a potential therapeutic strategy.

Area of Science:

  • Molecular Biology
  • Cancer Research
  • Gene Regulation

Context:

  • The bcl-2 gene plays a crucial role in inhibiting apoptosis, making it a significant target in cancer therapy.
  • Gastric cancer remains a leading cause of cancer-related mortality worldwide, necessitating novel therapeutic approaches.
  • Antisense technology offers a targeted mechanism to modulate gene expression.

Purpose:

  • To investigate the efficacy of bcl-2 antisense oligodeoxynucleotides (AS-ODNs) in regulating bcl-2 gene expression.
  • To determine the potential of AS-ODNs to induce apoptosis in the human gastric cancer cell line BGC-823 in vitro.
  • To compare the effectiveness of two different AS-ODN sequences and the impact of liposomal encapsulation.

Summary:

  • Two bcl-2 AS-ODNs, targeting different regions of the bcl-2 mRNA, were synthesized and tested on BGC-823 cells.
  • Both AS-ODNs, particularly when encapsulated in liposomes (DOTAP), significantly inhibited cell proliferation and reduced bcl-2 expression at both mRNA and protein levels.
  • Treatment with AS-ODNs induced apoptosis in BGC-823 cells, evidenced by morphological changes and flow cytometry analysis.

Impact:

  • This study demonstrates that bcl-2 AS-ODNs can effectively suppress bcl-2 gene expression and trigger programmed cell death in gastric cancer cells.
  • The findings suggest that AS-ODN therapy, especially with liposomal delivery, holds promise as a novel strategy for treating human gastric cancer.
  • Further research into bcl-2 targeted antisense therapy could lead to the development of more effective and less toxic treatments for gastric malignancies.

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