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Published on: July 25, 2020
Targeting Stat3 in cancer therapy
1Department of Medicine and Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA. njing@bcm.tmc.edu
Abstract:
Stat3 is constitutively activated in many human cancers where it functions as a critical mediator of oncogenic signaling through transcriptional activation of genes encoding apoptosis inhibitors (e.g. Bcl-x(L), Mcl-1 and survivin), cell-cycle regulators (e.g. cyclin D1 and c-Myc) and inducers of angiogenesis (e.g. vascular endothelial growth factor). This article reviews several approaches that have been pursued for targeting Stat3 in cancer therapy including antisense strategies, tyrosine kinase inhibition, decoy phosphopeptides, decoy duplex oligonucleotides and G-quartet oligodeoxynucleotides (GQ-ODN). The GQ-ODN strategy is reviewed in somewhat greater detail than the others because it includes a novel system that effectively delivers drug into cells and tissues, addresses successfully the issue of specificity of targeting Stat3 versus Stat1, and has demonstrated efficacy in vivo.
Insights
Targeting Signal Transducer and Activator of Transcription 3 (Stat3) is crucial for cancer therapy. G-quartet oligodeoxynucleotides (GQ-ODN) offer a promising strategy with effective delivery and specificity for Stat3 inhibition.
Area of Science:
- Oncology
- Molecular Biology
- Drug Discovery
Background:
- Signal Transducer and Activator of Transcription 3 (Stat3) is constitutively activated in numerous human cancers.
- Activated Stat3 promotes oncogenesis by regulating genes involved in apoptosis, cell cycle progression, and angiogenesis.
Purpose of the Study:
- To review various therapeutic strategies targeting Stat3 in cancer treatment.
- To highlight the potential of G-quartet oligodeoxynucleotides (GQ-ODN) as a novel Stat3-targeting therapy.
Main Methods:
- Review of existing literature on Stat3-targeting cancer therapies.
- Detailed examination of the G-quartet oligodeoxynucleotides (GQ-ODN) strategy, including its delivery system and specificity.
Main Results:
- Multiple approaches for targeting Stat3 are under investigation, including antisense strategies, tyrosine kinase inhibitors, and decoy molecules.
- The GQ-ODN strategy demonstrates effective drug delivery, specific targeting of Stat3 over Stat1, and in vivo efficacy.
Conclusions:
- Targeting Stat3 represents a viable strategy for cancer therapy.
- GQ-ODN technology shows significant promise due to its novel delivery system, specificity, and demonstrated in vivo effectiveness.
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