دورية أكاديمية
Towards Response ADAptive Radiotherapy for organ preservation for intermediate-risk rectal cancer (preRADAR): protocol of a phase I dose-escalation trial
| العنوان: | Towards Response ADAptive Radiotherapy for organ preservation for intermediate-risk rectal cancer (preRADAR): protocol of a phase I dose-escalation trial |
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| المؤلفون: | Miangela M Lacle, Sjoerd G Elias, Leon M G Moons, Helena M Verkooijen, Manon N G J A Braat, Myriam Chalabi, Corrie A M Marijnen, Femke P Peters, Brechtje A Grotenhuis, Miriam Koopman, Petur Snaebjornsson, Esther Consten, Wilhelmina M U van Grevenstein, Maaike E Verweij, Max D Tanaka, Chavelli M Kensen, Uulke A van der Heide, Tomas Janssen, Tineke Vijlbrief, Monique Maas, Inge L Huibregtse, Remond Fijneman, Apollo Pronk, Anke B Smits, Joost T Heikens, Hidde Eijkelenkamp, Maartje M C Schoenmakers, Gert J Meijer, Martijn Intven |
| المصدر: | BMJ Open, Vol 13, Iss 6 (2023) |
| بيانات النشر: | BMJ Publishing Group, 2023. |
| سنة النشر: | 2023 |
| المجموعة: | LCC:Medicine |
| مصطلحات موضوعية: | Medicine |
| الوصف: | Introduction Organ preservation is associated with superior functional outcome and quality of life (QoL) compared with total mesorectal excision (TME) for rectal cancer. Only 10% of patients are eligible for organ preservation following short-course radiotherapy (SCRT, 25 Gy in five fractions) and a prolonged interval (4–8 weeks) to response evaluation. The organ preservation rate could potentially be increased by dose-escalated radiotherapy. Online adaptive magnetic resonance-guided radiotherapy (MRgRT) is anticipated to reduce radiation-induced toxicity and enable radiotherapy dose escalation. This trial aims to establish the maximum tolerated dose (MTD) of dose-escalated SCRT using online adaptive MRgRT.Methods and analysis The preRADAR is a multicentre phase I trial with a 6+3 dose-escalation design. Patients with intermediate-risk rectal cancer (cT3c-d(MRF-)N1M0 or cT1-3(MRF-)N1M0) interested in organ preservation are eligible. Patients are treated with a radiotherapy boost of 2×5 Gy (level 0), 3×5 Gy (level 1), 4×5 Gy (level 2) or 5×5 Gy (level 3) on the gross tumour volume in the week following standard SCRT using online adaptive MRgRT. The trial starts on dose level 1. The primary endpoint is the MTD based on the incidence of dose-limiting toxicity (DLT) per dose level. DLT is a composite of maximum one in nine severe radiation-induced toxicities and maximum one in three severe postoperative complications, in patients treated with TME or local excision within 26 weeks following start of treatment. Secondary endpoints include the organ preservation rate, non-DLT, oncological outcomes, patient-reported QoL and functional outcomes up to 2 years following start of treatment. Imaging and laboratory biomarkers are explored for early response prediction.Ethics and dissemination The trial protocol has been approved by the Medical Ethics Committee of the University Medical Centre Utrecht. The primary and secondary trial results will be published in international peer-reviewed journals.Trial registration number WHO International Clinical Trials Registry (NL8997; https://trialsearch.who.intTest). |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2022-0650 2044-6055 |
| العلاقة: | https://bmjopen.bmj.com/content/13/6/e065010.fullTest; https://doaj.org/toc/2044-6055Test |
| DOI: | 10.1136/bmjopen-2022-065010 |
| الوصول الحر: | https://doaj.org/article/8286f62013fd42359e5ab23a6da2c02aTest |
| رقم الانضمام: | edsdoj.8286f62013fd42359e5ab23a6da2c02a |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 20220650 20446055 |
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| DOI: | 10.1136/bmjopen-2022-065010 |