Antisense DNA toward type I protein kinase A produces sustained inhibition of tumor growth

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Updated: Aug 9, 2026

Assessment of Mitochondrial Functions and Cell Viability in Renal Cells Overexpressing Protein Kinase C Isozymes
15:43

Assessment of Mitochondrial Functions and Cell Viability in Renal Cells Overexpressing Protein Kinase C Isozymes

Published on: January 7, 2013

Y S Cho-Chung1

  • 1Cellular Biochemistry Section, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892-1750, USA.

Proceedings of the Association of American Physicians
|January 1, 1997
PubMed

Insights

Inhibition of RI alpha gene expression using antisense oligodeoxynucleotide halts cancer cell growth and promotes leukemia cell differentiation. This targeted approach offers a promising strategy for controlling neoplastic growth with infrequent dosing.

Area of Science:

  • Molecular Biology
  • Cancer Research
  • Biochemistry

Background:

  • Increased expression of the RI alpha subunit of cyclic AMP-dependent protein kinase (PKA) is observed in various human cancers.
  • This subunit plays a role in cell growth and transformation.

Purpose of the Study:

  • To investigate the effects of sequence-specific inhibition of RI alpha gene expression on cancer cell growth and differentiation.
  • To evaluate the therapeutic potential of RI alpha antisense oligodeoxynucleotide in vivo.

Main Methods:

  • Utilized RI alpha antisense oligodeoxynucleotide to inhibit RI alpha gene expression.
  • Administered single-injection treatment in vivo to mice with tumors.
  • Analyzed changes in RI alpha expression, cell differentiation, and tumor growth.

Main Results:

  • RI alpha antisense treatment led to leukemia cell differentiation and growth arrest in epithelial cancer cells.
  • A single in vivo injection reduced RI alpha expression and inhibited tumor growth for up to 2 weeks.
  • Antisense treatment rebalanced PKA type I and PKA type II production, making tumor cells behave like untransformed cells.

Conclusions:

  • Targeting RI alpha gene expression with antisense technology is an effective strategy for controlling neoplastic growth.
  • The long-lasting biochemical imprint of RI alpha antisense allows for infrequent dosing, presenting a novel therapeutic approach for cancer.
  • This method demonstrates potential for restraining tumor growth by modulating PKA signaling pathways.

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