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The development of oncology drugs traditionally begins by studying them in heavily pretreated patients, and then working ‘upstream’ to populations with earlier-stage disease. The recent FDA approval of an androgen receptor antagonist first in prostate cancer patients without demonstrable metastatic disease but at high-risk for metastasis, based on a novel metastasis-free survival end point developed by the FDA, could provide a template for a paradigm shift.
Traditionally, oncology drugs are first studied and approved in patients with advanced, heavily pretreated cancers, and then in patient populations with earlier stages of disease. This is an efficient route for bringing a new drug to patients for several reasons. First, the size of studies can be smaller because studies may not require an active comparator arm if no approved drug is available for the indication. Second, the study duration can be shorter in late-stage disease because progression events typically occur rapidly in this setting, which decreases the time to reach a pre-specified end point. Third, patients with advanced, heavily pretreated disease tend to be actively looking for clinical trials, which can lead to rapid enrolment.
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Nature Reviews Drug Discovery18, 159-160 (2019)
doi: https://doi.org/10.1038/d41573-018-00006-3
References
Beaver, J. A., Kluetz, P. G. & Pazdur, R. Metastasis-free survival – a new end point in prostate cancer trials. N. Engl. J. Med. 378, 2458–2460 (2018).