Abstract
The time required to conduct clinical trials limits the rate at which we can evaluate and deliver new treatment options to patients with cancer. New approaches to increase trial efficiency while maintaining rigor would benefit patients, especially in oncology, in which adjuvant trials hold promise for intercepting metastatic disease, but typically require large numbers of patients and many years to complete. We envision a standing platform — an infrastructure to support ongoing identification and trial enrolment of patients with cancer with early molecular evidence of disease (MED) after curative-intent therapy for early-stage cancer, based on the presence of circulating tumour DNA. MED strongly predicts subsequent recurrence, with the vast majority of patients showing radiographic evidence of disease within 18 months. Such a platform would allow efficient testing of many treatments, from small exploratory studies to larger pivotal trials. Trials enrolling patients with MED but without radiographic evidence of disease have the potential to advance drug evaluation because they can be smaller (given high probability of recurrence) and faster (given short time to recurrence) than conventional adjuvant trials. Circulating tumour DNA may also provide a valuable early biomarker of treatment effect, which would allow small signal-finding trials. In this Perspective, we discuss how such a platform could be established.
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Acknowledgements
The authors thank S. Kopetz, V. Adalsteinsson, T. Golub, B. Alexander and T. Hudson for providing reviews and comments.
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A.J.M., A.B.C. and A.R. researched data for the article. All authors contributed substantially to discussion of the content. A.J.M., A.B.C., A.R., E.S.L. and A.P. wrote the article. All authors reviewed and/or edited the manuscript before submission.
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A.J.M. has served as an adviser/consultant for AstraZeneca, Guardant Health, Illumina, Myriad Genetics, Natera, SAGA Diagnostics and Science for America. A.J.M.’s research is supported by a National Institutes of Health K12 grant (K12CA087723). The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health. A.R. holds equity in Roche. N.W. is an employee of Genentech/Roche and has equity in Roche, Relay Therapeutics and Flare Therapeutics. L.G. is an employee of Genentech/Roche and has equity in Roche. A.P. has held Equity in C2i Genomics, XGenomes, Cadex, Vionix and Parithera. In the past 36 months, she has served as an adviser/consultant for Eli Lilly, Mirati, Pfizer, Inivata, Biofidelity, Checkmate Pharmaceuticals, FMI, Guardant, Abbvie, Bayer, Delcath, Taiho, CVS, Value Analytics Lab, Seagen, Saga, AZ, Scare Inc., Illumina, Taiho, Hookipa, Kahar Medical, Xilio Therapeutics, Sirtex, Takeda and Science for America. She receives fees from Up to Date. She has received travel fees from Karkinos Healthcare. She has been on the DSMC for a Roche study and on the Steering Committee for Exilixis. She has received research funding to the Institution from PureTech, PMV Pharmaceuticals, Plexxicon, Takeda, BMS, Mirati, Novartis, Erasca, Genentech, Daiichi Sankyo, Syndax, Revolution Medicine and Parthenon. A.P.’s research is supported by an NIH/NCI K08 grant (K08273688). A.B.C. and E.S.L. declare no competing interests.
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Glossary
- Baseline toxicity
-
Persistent side effects after cancer-directed therapy (for example, permanent neuropathy).
- Circulating tumour DNA
-
(ctDNA). Cell-free fragments of DNA released by tumour cells into the blood.
- Clinical evidence of disease
-
(CED). Clinical evidence of cancer detected on exam (for example, a palpable mass).
- Clinically high-risk disease
-
High-risk disease is determined by clinical factors (for example, tumour size and number of affected lymph nodes) and pathological factors (for example, high mitotic index or presence of residual disease after neoadjuvant therapy) that have been shown to be associated with a high risk of recurrence.
- Definitive treatment
-
Cancer-directed therapy, for example, surgery, radiation and chemotherapy, given with the intention of cure.
- Minimal residual disease
-
(MRD). Cancer in the blood (or bone marrow) that remains detectable after treatment.
- Molecular evidence of disease
-
(MED). Circulating tumour DNA (ctDNA) detectable via blood assay. In ‘early MED’, ctDNA is detected before radiographic findings or clinical evidence of cancer.
- Radiographic evidence of disease
-
(RED). Radiography images that visibly show the presence of cancer.
- Registrational trial
-
A trial that is used by regulatory authorities to determine whether a drug is safe and effective enough to be approved and administered to patients outside a clinical trial. Typically, registrational trials are large-scale, randomized controlled trials.
- Signal-finding trials
-
Clinical trials with the objective of identifying treatment (treatments) with an early indication of efficacy — usually measured using molecular biomarkers that reflect a relevant biological process — before advancing to larger, more definitive trials with robust clinical end points.
- Single-arm studies
-
A non-randomized clinical trial that uses only one experimental group of patients, without a control group.
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Medford, A.J., Carmeli, A.B., Ritchie, A. et al. A standing platform for cancer drug development using ctDNA-based evidence of recurrence. Nat Rev Cancer 24, 810–821 (2024). https://doi.org/10.1038/s41568-024-00742-2
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DOI: https://doi.org/10.1038/s41568-024-00742-2
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