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Updated: Jun 5, 2025

A Data Integration Workflow to Identify Drug Combinations Targeting Synthetic Lethal Interactions
Published on: May 27, 2021
Synthetic lethal strategies for the development of cancer therapeutics
Natalie Y L Ngoi1,2,3, David Gallo4, Carlos Torrado1
1Department of Investigational Cancer Therapeutics (Phase I Clinical Trials Program), Division of Cancer Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.
Abstract:
Synthetic lethality is a genetic phenomenon whereby the simultaneous presence of two different genetic alterations impairs cellular viability. Importantly, targeting synthetic lethal interactions offers potential therapeutic strategies for cancers with alterations in pathways that might otherwise be considered undruggable. High-throughput screening methods based on modern CRISPR-Cas9 technologies have emerged and become crucial for identifying novel synthetic lethal interactions with the potential for translation into biologically rational cancer therapeutic strategies as well as associated predictive biomarkers of response capable of guiding patient selection. Spurred by the clinical success of PARP inhibitors in patients with BRCA-mutant cancers, novel agents targeting multiple synthetic lethal interactions within DNA damage response pathways are in clinical development, and rational strategies targeting synthetic lethal interactions spanning alterations in epigenetic, metabolic and proliferative pathways have also emerged and are in late preclinical and/or early clinical testing. In this Review, we provide a comprehensive overview of established and emerging technologies for synthetic lethal drug discovery and development and discuss promising therapeutic strategies targeting such interactions.
Insights
Synthetic lethality uses two genetic alterations to impair cancer cell viability. This approach, enhanced by CRISPR-Cas9 screening, offers new therapeutic strategies and biomarkers for cancer treatment.
Area of Science:
- Genetics
- Cancer Biology
- Drug Discovery
Background:
- Synthetic lethality involves two genetic alterations that compromise cell viability.
- Targeting synthetic lethal interactions presents therapeutic opportunities for cancers with undruggable pathways.
- CRISPR-Cas9 technologies are pivotal in identifying novel synthetic lethal interactions.
Purpose of the Study:
- To review established and emerging technologies for synthetic lethal drug discovery.
- To discuss promising therapeutic strategies targeting synthetic lethal interactions.
- To highlight the role of synthetic lethality in cancer therapy and biomarker development.
Main Methods:
- High-throughput screening using CRISPR-Cas9.
- Review of preclinical and clinical studies on synthetic lethality.
- Analysis of therapeutic strategies targeting DNA damage response, epigenetic, metabolic, and proliferative pathways.
Main Results:
- CRISPR-Cas9 screening is crucial for identifying synthetic lethal interactions.
- Synthetic lethality offers potential for targeted cancer therapies and predictive biomarkers.
- Clinical development is advancing for agents targeting DNA damage response pathways.
Conclusions:
- Synthetic lethality is a promising avenue for developing novel cancer therapeutics.
- Technological advancements are accelerating the discovery and development of synthetic lethal drugs.
- Targeting synthetic lethal interactions across various pathways holds significant therapeutic potential.
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