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Published on: July 25, 2020
Phase II clinical trials in oncology: are we hitting the target?
Mei-Kim Ang1, Say-Beng Tan, Wan-Teck Lim
1National Cancer Centre Singapore, 11 Hospital Drive, Singapore. ang.mei.kim@nccs.com.sg
Abstract:
The number of novel and molecularly targeted agents in the last decade that need screening for preliminary efficacy in Phase II trials has increased. Many of these agents have a cytostatic mode of action that is difficult to assess using traditional Phase II designs. These new agents require detailed evaluation to optimize their dosing, to evaluate their effects on their target and to define early markers that predict for a definitive benefit. This review focuses on the options for Phase II trial designs. The different end points, single versus multiarm and randomized designs, the use of biomarkers and Bayesian approaches are also reviewed. The final design chosen will depend on the characteristics and circumstances of each individual study.
Insights
Novel cancer therapies require advanced Phase II trial designs. This review explores innovative approaches, including biomarkers and Bayesian methods, to assess cytostatic agents effectively and optimize patient treatment strategies.
Area of Science:
- Oncology
- Clinical Trial Design
- Pharmacology
Background:
- Increasing development of novel molecularly targeted agents.
- Challenges in assessing cytostatic agents with traditional Phase II trial designs.
- Need for optimized dosing and predictive markers for new therapies.
Purpose of the Study:
- Review available options for Phase II trial designs.
- Discuss endpoints, study structures, and statistical approaches.
- Provide guidance for selecting appropriate Phase II designs for novel agents.
Main Methods:
- Literature review of Phase II trial designs.
- Analysis of different endpoints and study structures (single-arm, multiarm, randomized).
- Evaluation of biomarker utilization and Bayesian statistical methods.
Main Results:
- Traditional designs are insufficient for cytostatic agents.
- Biomarkers and Bayesian approaches offer improved evaluation methods.
- No single design fits all studies; selection is context-dependent.
Conclusions:
- Phase II trial designs must adapt to novel therapeutic strategies.
- Careful consideration of endpoints, design, and statistical methods is crucial.
- Tailored Phase II designs are essential for evaluating new molecularly targeted agents.
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