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Grassi E, Zingaretti C, Petracci E, Corbelli J, Papiani G, Banchelli I, Valli I, Frassineti GL, Passardi A, Di Bartolomeo M, Pietrantonio F, Gelsomino F, Carandina I, Banzi M, Martella L, Bonetti AV, Boccaccino A, Molinari C, Marisi G, Ugolini G, Nanni O, Tamberi S. Phase II study of capecitabine-based concomitant chemoradiation followed by durvalumab as a neoadjuvant strategy in locally advanced rectal cancer: the PANDORA trial. ESMO Open 2023; 8:101824. [PMID: 37774508 PMCID: PMC10594026 DOI: 10.1016/j.esmoop.2023.101824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 08/17/2023] [Accepted: 08/19/2023] [Indexed: 10/01/2023] Open
Abstract
BACKGROUND This study investigated the efficacy of chemoradiotherapy (CRT) followed by durvalumab as neoadjuvant therapy of locally advanced rectal cancer. PATIENTS AND METHODS The PANDORA trial is a prospective, phase II, open-label, single-arm, multicenter study aimed at evaluating the efficacy and safety of preoperative treatment with durvalumab (1500 mg every 4 weeks for three administrations) following long-course radiotherapy (RT) plus concomitant capecitabine (5040 cGy RT in 25-28 fractions over 5 weeks and capecitabine administered at 825 mg/m2 twice daily). The primary endpoint was the pathological complete response (pCR) rate; secondary endpoints were the proportion of clinical complete remissions and safety. The sample size was estimated assuming a null pCR proportion of 0.15 and an alternative pCR proportion of 0.30 (α = 0.05, power = 0.80). The proposed treatment could be considered promising if ≥13 pCRs were observed in 55 patients (EudraCT: 2018-004758-39; NCT04083365). RESULTS Between November 2019 and August 2021, 60 patients were accrued, of which 55 were assessable for the study's objectives. Two patients experienced disease progression during treatment. Nineteen out of 55 eligible patients achieved a pCR (34.5%, 95% confidence interval 22.2% to 48.6%). Regarding toxicity related to durvalumab, grade 3 adverse events (AEs) occurred in four patients (7.3%) (diarrhea, skin toxicity, transaminase increase, lipase increase, and pancolitis). Grade 4 toxicity was not observed. In 20 patients (36.4%), grade 1-2 AEs related to durvalumab were observed. The most common were endocrine toxicity (hyper/hypothyroidism), dermatologic toxicity (skin rash), and gastrointestinal toxicity (transaminase increase, nausea, diarrhea, constipation). CONCLUSION This study met its primary endpoint showing that CRT followed by durvalumab could increase pCR with a safe toxicity profile. This combination is a promising, feasible strategy worthy of further investigation.
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Affiliation(s)
- E Grassi
- Medical Oncology Unit, "Degli Infermi" Hospital, AUSL della Romagna, Faenza
| | - C Zingaretti
- Unit of Biostatistics and Clinical Trials, IRCCS Istituto Romagnolo per lo Studio dei Tumori (IRST) "Dino Amadori", Meldola
| | - E Petracci
- Unit of Biostatistics and Clinical Trials, IRCCS Istituto Romagnolo per lo Studio dei Tumori (IRST) "Dino Amadori", Meldola
| | - J Corbelli
- Medical Oncology Unit, "Degli Infermi" Hospital, AUSL della Romagna, Faenza
| | - G Papiani
- Medical Oncology Unit, "Santa Maria delle Croci" Hospital, AUSL della Romagna, Ravenna
| | - I Banchelli
- Pathology Unit, "Santa Maria delle Croci" Hospital, AUSL della Romagna, Ravenna
| | - I Valli
- Unit of Biostatistics and Clinical Trials, IRCCS Istituto Romagnolo per lo Studio dei Tumori (IRST) "Dino Amadori", Meldola
| | - G L Frassineti
- Department of Medical Oncology, IRCCS Istituto Romagnolo per lo Studio dei Tumori (IRST) "Dino Amadori", Meldola
| | - A Passardi
- Department of Medical Oncology, IRCCS Istituto Romagnolo per lo Studio dei Tumori (IRST) "Dino Amadori", Meldola
| | - M Di Bartolomeo
- Gastroenterological Medical Oncology, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan
| | - F Pietrantonio
- Gastroenterological Medical Oncology, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan
| | - F Gelsomino
- Department of Oncology and Hematology, Division of Oncology, University Hospital of Modena, Modena
| | - I Carandina
- Department of Medical Oncology, "Sant'Anna" University Hospital of Ferrara, Ferrara
| | - M Banzi
- Medical Oncology Unit, "Santa Maria Nuova" Hospital, AUSL-IRCCS di Reggio Emilia, Reggio Emilia
| | - L Martella
- Department of Medical Oncology, "Sant'Anna" University Hospital of Ferrara, Ferrara
| | - A V Bonetti
- Department of Medical Oncology, "Mater Salutis" Hospital, Legnago
| | - A Boccaccino
- Medical Oncology Unit, "Santa Maria delle Croci" Hospital, AUSL della Romagna, Ravenna
| | - C Molinari
- Biosciences Laboratory, IRCCS Istituto Romagnolo per lo Studio dei Tumori (IRST) "Dino Amadori", Meldola
| | - G Marisi
- Biosciences Laboratory, IRCCS Istituto Romagnolo per lo Studio dei Tumori (IRST) "Dino Amadori", Meldola
| | - G Ugolini
- General Surgery Unit, "Santa Maria delle Croci" Hospital, AUSL della Romagna, Ravenna, Italy
| | - O Nanni
- Unit of Biostatistics and Clinical Trials, IRCCS Istituto Romagnolo per lo Studio dei Tumori (IRST) "Dino Amadori", Meldola
| | - S Tamberi
- Medical Oncology Unit, "Degli Infermi" Hospital, AUSL della Romagna, Faenza; Medical Oncology Unit, "Santa Maria delle Croci" Hospital, AUSL della Romagna, Ravenna.
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