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Clinical trials for predictive medicine
1Biometric Research Branch, National Cancer Institute, 9000 Rockville Pike, MSC7434, Bethesda, MD 20892-7434, U.S.A. rsimon@nih.gov
Abstract:
Developments in biotechnology and genomics are providing a biological basis for the heterogeneity of clinical course and response to treatment that have long been apparent to clinicians. The ability to molecularly characterize human diseases presents new opportunities to develop more effective treatments and new challenges for the design and analysis of clinical trials. In oncology, treatment of broad populations with regimens that benefit a minority of patients is less economically sustainable with expensive molecularly targeted therapeutics. The established molecular heterogeneity of human diseases requires the development of new paradigms for the design and analysis of randomized clinical trials as a reliable basis for predictive medicine. We review prospective designs for the development of new therapeutics and predictive biomarkers to inform their use. We cover designs for a wide range of settings. At one extreme is the development of a new drug with a single candidate biomarker and strong biological evidence that marker negative patients are unlikely to benefit from the new drug. At the other extreme are Phase III clinical trials involving both genome-wide discovery of a predictive classifier and internal validation of that classifier. We have outlined a prediction-based approach to the analysis of randomized clinical trials that both preserves the Type I error and provides a reliable internally validated basis for predicting which patients are most likely or unlikely to benefit from the new regimen.
Insights
Biotechnology and genomics reveal disease heterogeneity, necessitating new clinical trial designs. A prediction-based approach ensures reliable identification of patients who will benefit from targeted therapies.
Area of Science:
- Biotechnology and Genomics
- Clinical Trial Design
- Precision Medicine
Background:
- Disease heterogeneity is evident clinically, now supported by biological insights from biotechnology and genomics.
- Molecular characterization of diseases offers opportunities for novel treatments but challenges clinical trial design.
- Current oncology practices are unsustainable, with broad treatments benefiting few patients, especially with expensive targeted therapies.
Purpose of the Study:
- To review prospective designs for developing new therapeutics and predictive biomarkers.
- To address the need for new paradigms in randomized clinical trial design and analysis for predictive medicine.
- To outline a prediction-based approach for analyzing clinical trials.
Main Methods:
- Review of prospective clinical trial designs for therapeutics and biomarkers.
- Exploration of designs ranging from single-biomarker development to genome-wide classifier discovery and validation.
- Development of a prediction-based analytical approach for randomized clinical trials.
Main Results:
- Proposed designs accommodate a spectrum of biomarker development, from single candidates to complex genomic classifiers.
- The prediction-based analysis preserves Type I error rates.
- The approach provides internally validated methods for predicting patient response to new regimens.
Conclusions:
- Advances in biotechnology and genomics necessitate adaptive clinical trial designs.
- A prediction-based analytical framework is crucial for effective personalized medicine.
- New trial designs and analysis methods ensure reliable identification of patient subgroups likely to benefit from novel treatments.
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