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Updated: May 26, 2026

Testing Targeted Therapies in Cancer using Structural DNA Alteration Analysis and Patient-Derived Xenografts
Published on: July 25, 2020
Advancing cancer drug discovery towards more agile development of targeted combination therapies
Neil O Carragher1, Asier Unciti-Broceta, David A Cameron
1Edinburgh Cancer Research UK Centre, University of Edinburgh, Western General Hospital, Crewe Road South, Edinburgh, UK. n.carragher@ed.ac.uk
Abstract:
Current drug-discovery strategies are typically 'target-centric' and are based upon high-throughput screening of large chemical libraries against nominated targets and a selection of lead compounds with optimized 'on-target' potency and selectivity profiles. However, high attrition of targeted agents in clinical development suggest that combinations of targeted agents will be most effective in treating solid tumors if the biological networks that permit cancer cells to subvert monotherapies are identified and retargeted. Conventional drug-discovery and development strategies are suboptimal for the rational design and development of novel drug combinations. In this article, we highlight a series of emerging technologies supporting a less reductionist, more agile, drug-discovery and development approach for the rational design, validation, prioritization and clinical development of novel drug combinations.
Insights
Targeted cancer therapies often fail. Identifying and retargeting biological networks that enable cancer cells to evade single-drug treatments is key for effective combination therapies. Emerging technologies support this agile approach.
Area of Science:
- Oncology
- Drug Discovery
- Systems Biology
Background:
- Current drug discovery relies on target-centric approaches, screening large libraries against specific targets.
- High attrition rates in clinical development indicate limitations of monotherapies for solid tumors.
- Cancer cells can subvert single-agent therapies by exploiting complex biological networks.
Purpose of the Study:
- To address the limitations of conventional drug discovery for developing effective combination therapies.
- To highlight emerging technologies that enable a more agile and systems-level approach to drug discovery.
- To facilitate the rational design, validation, and clinical development of novel drug combinations for cancer treatment.
Main Methods:
- Review of emerging technologies supporting a less reductionist drug discovery approach.
- Focus on identifying and retargeting biological networks that enable cancer cell resistance.
- Emphasis on rational design and validation of drug combinations.
Main Results:
- Current target-centric strategies are suboptimal for developing combination therapies.
- Emerging technologies offer a more agile approach to drug discovery and development.
- A systems-level understanding of cancer biology is crucial for effective combination therapy design.
Conclusions:
- A paradigm shift from reductionist to systems-level, agile drug discovery is needed for combination therapies.
- Emerging technologies can support the rational development of novel drug combinations.
- Retargeting cancer's adaptive resistance mechanisms is essential for improving treatment efficacy.
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