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Apoptosis in human tumor cells following treatment with p120 antisense oligodeoxynucleotide ISIS 3466

R K Busch1, L Perlaky, B C Valdez

  • 1Department of Pharmacology, Baylor College of Medicine, Houston, TX 77030.

Cancer Letters
|November 11, 1994
PubMed

Insights

Antisense oligonucleotide ISIS 3466 induces apoptosis in HeLa cells, characterized by DNA fragmentation and increased cell death. This finding highlights its potential as a therapeutic agent targeting cancer cells.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Biochemistry

Background:

  • Phosphorothioate oligonucleotides are emerging as therapeutic agents.
  • Antisense technology targets specific gene expression.
  • Apoptosis is programmed cell death crucial in development and disease.

Purpose of the Study:

  • To investigate the effects of antisense oligonucleotide ISIS 3466 on HeLa cells.
  • To confirm apoptosis induction by ISIS 3466 in HeLa cells.
  • To compare the efficacy of ISIS 3466 with other oligonucleotides.

Main Methods:

  • Treatment of HeLa cells with ISIS 3466 and other oligonucleotides.
  • Morphological analysis of cells for apoptosis indicators.
  • DNA extraction and agarose gel electrophoresis to detect nucleosomal ladders.
  • Quantification of floating and attached cells to assess toxicity.

Main Results:

  • ISIS 3466 induced apoptosis in HeLa cells, evidenced by nucleosomal DNA fragmentation (laddering).
  • Morphological changes consistent with apoptosis were observed, particularly in detached cells.
  • ISIS 3466 resulted in the highest percentage of floating cells (78.4%), indicating significant toxicity.
  • Other tested oligonucleotides showed lower toxicity and did not induce nucleosomal laddering.

Conclusions:

  • Antisense oligonucleotide ISIS 3466 effectively induces apoptosis in HeLa cells.
  • The percentage of floating cells serves as a reliable indicator of oligonucleotide-induced toxicity.
  • ISIS 3466 demonstrates potent cytotoxic effects on HeLa cells, warranting further investigation for cancer therapy.

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