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Updated: Sep 27, 2026

Testing Targeted Therapies in Cancer using Structural DNA Alteration Analysis and Patient-Derived Xenografts
Published on: July 25, 2020
Clinical trial designs for targeted agents
Brigette B Y Ma1, Carolyn D Britten, Lillian L Siu
1Department of Medical Oncology, Princess Margaret Hospital, University Health Network, 610 University Avenue, Toronto, ON M5G 2M9, Canada.
Abstract:
With an increasing number of targeted agents available for testing, clinical trials must be rationally designed based on sound knowledge of the molecular mechanisms linking target and disease, fortified by strong preclinical data demonstrating how this relationship is modified by the targeted agent. Patients and resources are precious and should be expended judiciously on clinical trials that are well planned. Although traditional trial designs and endpoints may not be adequate for developing contemporary targeted drugs, transiting directly from phase I to phase III testing should be avoided except in distinct circumstances. Increased research efforts should be spent on the prospective evaluation and validation of novel biologic endpoints and innovative clinical designs, such that promising targeted agents can be effectively developed to benefit the care of cancer patients.
Insights
Rational clinical trial design is crucial for developing targeted cancer therapies. Well-planned trials, supported by preclinical data and novel endpoints, ensure efficient use of resources for patient benefit.
Area of Science:
- Oncology
- Clinical Pharmacology
- Translational Medicine
Background:
- The proliferation of targeted agents necessitates rigorous clinical trial design.
- Understanding molecular mechanisms and preclinical data is vital for drug development.
- Current trial designs may not suit novel targeted therapies.
Purpose of the Study:
- To emphasize the importance of rational clinical trial design for targeted agents.
- To advocate for the judicious use of patient resources in clinical research.
- To promote the development and validation of innovative trial designs and endpoints.
Main Methods:
- Review of current challenges in targeted agent development.
- Emphasis on the integration of molecular knowledge and preclinical evidence.
- Discussion of traditional versus innovative clinical trial strategies.
Main Results:
- Traditional trial designs and endpoints may be insufficient for targeted drugs.
- Premature progression from Phase I to Phase III trials should be avoided.
- Validation of novel biologic endpoints and innovative designs is needed.
Conclusions:
- Well-planned clinical trials are essential for effective targeted therapy development.
- Resources should be allocated to trials with strong scientific rationale.
- Future research should focus on prospective validation of new trial methodologies to improve cancer patient care.
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