STAT3 inhibition in prostate and pancreatic cancer lines by STAT3 binding sequence oligonucleotides: differential activity between 5′ and 3′ ends
Open accessAbstract
Signal transducers and activators of transcription (STAT) were originally discovered as components of signal transduction pathways. Persistent aberrant activation of STAT3 is a feature of many malignancies including prostate cancer and pancreatic cancer. One consequence of persistently activated STAT3 in malignant cells is that they depend on it for survival; thus, STAT3 is an excellent molecular target for therapy. Previously, we reported that single-stranded oligonucleotides containing consensus STAT3 binding sequences (13410 and 13411) were more effective for inducing apoptosis in prostate cancer cells than antisense STAT3 oligonucleotides. Control oligonucleotides (scrambled sequences) had no effect. Here, we report that authentic STAT3 binding sequences, identified from published literature, were more effective for inducing apoptosis in prostate cancer cells and pancreatic cancer cells than was oligonucleotide 13410. Moreover, the authentic STAT3 binding sequences showed differing efficacies in the malignant cell lines depending on whether the canonical STAT3 binding sequence was truncated at the 5′ or the 3′ end. Finally, expression of one STAT3-regulated gene was decreased following treatment, suggesting that STAT3 may regulate the same set of genes in the two types of cancer. We conclude that truncating the 5′ end left intact enough of the canonical STAT3 binding site for effective hybridization to the genome, whereas truncation of the 3′ end, which is outside the canonical binding site, may have affected binding of required cofactors essential for STAT3 activity, thereby reducing the capacity of this modified oligonucleotide to induce apoptosis. Additional experiments to answer this hypothesis are under way. [Mol Cancer Ther 2008;7(6):1543–50]
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Nucleic acid-based drugs, including decoy oligonucleotides and, perhaps, G-quartet oligonucleotides, inhibit STAT3-mediated gene expression and inhibit growth of different cancer cell lines.
“Nucleic acid–based drugs, including decoy oligonucleotides and, perhaps, G-quartet oligonucleotides, have been identified that inhibit STAT3-mediated gene expression and inhibit growth of different cancer cell lines (Leong et al., 2003; Lewis et al., 2008; Sun et al., 2008; Shen et al., 2009; Zhang et al., 2013b; Liu et al., 2014; Sen et al., 2014).”
From Targeting Janus Kinases and Signal Transducer and Activator of Transcription 3 To Treat Inflammation, Fibrosis, and Cancer: Rationale, Progress, and Caution (2020) · cites this paper as Lewis et al., 2008
The Abstract reports that STAT3-binding-sequence oligonucleotides induced apoptosis in prostate and pancreatic cancer cell lines. The section ‘Anti-STAT3 Oligonucleotides Inhibited Expression of a STAT3-Regulated Gene, CD46’ reports reduced CD46 expression, supporting the gene-expression part of the claim. This paper does not establish the claim about G-quartet oligonucleotides. (LLM, conf=0.86)
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Validating Stat3 in cancer therapy
Darnell, J. E. (2005) · Nature Medicine · doi:10.1038/nm0605-595 · Cited by 307 · see citing works
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Bharadwaj, U., Kasembeli, M. M., Robinson, P., & Tweardy, D. J. (2020) · Pharmacological Reviews · doi:10.1124/pr.119.018440 · Cited by 314 · see citing works
“…and, perhaps, G-quartet oligonucleotides, have been identified that inhibit STAT3-mediated gene expression and inhibit growth of different cancer cell lines (Leong et al., 2003; Lewis et al., 2008; Sun et al., 2008; Shen et al., 2009; Zhang et al., 2013b; Liu et al., 2014; Sen et al., 2014).”
Background
- Authors
- Lewis, H. D., Winter, A., Murphy, T. F., Tripathi, S., Pandey, V. N., & Barton, B. E.
- Affiliations
- 1Surgery, and Departments of
- Rutgers New Jersey Medical School (US)
- VA New Jersey Health Care System (US)
- Venue
- Molecular Cancer Therapeutics
- Published
- 2008-06-01
- Volume
- 7
- Issue
- 6
- Pages
- 1543-1550
- ISSN
- 1535-7163 (ISSN-L)
- 1538-8514
- PMC
- PMC2561307
- OpenAlex
- W2162692965
- Cited by
- 25
- References
- 1
- Citations by year
- 2026: 1 · 2024: 1 · 2020: 1 · 2017: 2 · 2016: 2 · 2015: 4 · 2014: 1 · 2013: 1 · 2012: 4
- FWCI
- 1.41
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Molecular Cancer Therapeutics (publishedVersion)
- PubMed (publishedVersion)
- PubMed Central (acceptedVersion)
- Funders
- U.S. Department of Veterans Affairs
- National Institutes of Health
- National Cancer Institute (CA 121782, R21CA121782)
- National Institute of Allergy and Infectious Diseases (AI142529)
- Topics
- Health Sciences › Medicine › Oncology › Cytokine Signaling Pathways and Interactions
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA and Nucleic Acid Chemistry
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Advanced biosensing and bioanalysis techniques
- Keywords
- STAT3, prostate cancer, pancreatic cancer, antisense oligonucleotides, oligonucleotide design, apoptosis induction, gene silencing
- MeSH terms
- Base Sequence, Humans, Male, Molecular Sequence Data, Oligonucleotides, Oxidation-Reduction, Pancreatic Neoplasms, Prostatic Neoplasms, Protein Binding, Gene Expression Regulation, Neoplastic, Apoptosis, Cell Line, Tumor, STAT3 Transcription Factor, Membrane Cofactor Protein
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