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Shimoi T, Sunami K, Tahara M, Nishiwaki S, Tanaka S, Baba E, Kanai M, Kinoshita I, Shirota H, Hayashi H, Nishida N, Kubo T, Mamesaya N, Ando Y, Okita N, Shibata T, Nakamura K, Yamamoto N. Dabrafenib and trametinib administration in patients with BRAF V600E/R or non-V600 BRAF mutated advanced solid tumours (BELIEVE, NCCH1901): a multicentre, open-label, and single-arm phase II trial. EClinicalMedicine 2024; 69:102447. [PMID: 38333370 PMCID: PMC10850114 DOI: 10.1016/j.eclinm.2024.102447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 12/14/2023] [Accepted: 01/12/2024] [Indexed: 02/10/2024] Open
Abstract
Background BRAF V600 mutations are common in melanoma, thyroid, and non-small-cell lung cancers. Despite dabrafenib and trametinib being standard treatments for certain cancers, their efficacy across various solid tumours remains unelucidated. The BELIEVE trial assessed the efficacy of dabrafenib and trametinib in solid tumours with BRAF V600E/R or non-V600 BRAF mutations. Methods Between October 1, 2019, and June 2022, at least 50 patients with measurable and seven without measurable diseases examined were enrolled in a subcohort of the BELIEVE trial (NCCH1901, jRCTs031190104). BRAF mutated solid tumour cases other than BRAF V600E mutated colorectal cancer, melanoma, and non-small cell lung cancer cases were included. Patients with solid tumours received dabrafenib (150 mg) twice daily and trametinib (2 mg) once daily until disease progression or intolerable toxicity was observed. The primary endpoint was overall response rate (ORR), and secondary endpoints included progression-free survival (PFS), 6-month PFS, and overall survival (OS). Bayesian analysis was performed using a prior distribution with a 30% expected response rate [Beta (0.6, 1.4)]. Findings Fourty-seven patients with measurable disease, mainly with the BRAF V600E mutation (94%), and three others with non-V600E BRAF mutations (V600R, G466A, and N486_P490del) were enrolled. The primary sites included the thyroid gland, central nervous system, liver, bile ducts, colorectum, and pancreas. The confirmed ORR was 28.0%; the expected value of posterior distribution [Beta (14.6, 37.4)] was 28.1%, although the primary endpoint was achieved, not exceeding an unexpectedly high response rate of 60% obtained using Bayesian analysis. The disease control rate (DCR) was 84.0%. The median PFS was 6.5 months (95% confidence interval [CI]; 4.2-7.2 months, 87.8% at 6 months). Responses were observed across seven tumour types. Median OS was 9.7 months (95% CI, 7.5-12.2 months). Additional patients without measurable diseases had a median PFS of 4.5 months. Adverse events (AEs) were consistent with previous reports, with 45.6% of patients experiencing grade ≥3 AEs. Interpretation This study reported promising efficacy against BRAF V600-mutant tumours. Dabrafenib and trametinib would offer a new therapeutic option for rare cancers, such as high-grade gliomas, biliary tract cancer, and thyroid cancer. Funding This study was funded by the Japan Agency for Medical Research and Development (22ck0106622h0003) and a Health and Labour Sciences Research Grant (19EA1008).
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Affiliation(s)
- Tatsunori Shimoi
- Department of Medical Oncology, National Cancer Center Hospital, Tokyo, Japan
- Department of International Clinical Development, National Cancer Center Hospital, Tokyo, Japan
| | - Kuniko Sunami
- Department of Laboratory Medicine, National Cancer Center Hospital, Tokyo, Japan
| | - Makoto Tahara
- Department of Head and Neck Medical Oncology, National Cancer Center Hospital East, Kashiwa, Japan
| | - Satoshi Nishiwaki
- Department of Advanced Medicine, Nagoya University Hospital, Aichi, Japan
| | - Shota Tanaka
- Department of Neurosurgery, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Eishi Baba
- Department of Oncology and Social Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Masashi Kanai
- Department of Therapeutic Oncology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Ichiro Kinoshita
- Department of Medical Oncology, Hokkaido University Hospital, Hokkaido, Japan
| | - Hidekazu Shirota
- Department of Medical Oncology, Tohoku University Hospital, Sendai, Miyagi, Japan
| | - Hideyuki Hayashi
- Genomics Unit, Keio Cancer Center, Keio University School of Medicine, Tokyo, Japan
| | - Naohiro Nishida
- Center for Cancer Genomics and Personalized Medicine, Osaka University Hospital, Osaka, Japan
| | - Toshio Kubo
- Center for Clinical Oncology, Okayama University Hospital, Japan
| | - Nobuaki Mamesaya
- Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka, Japan
| | - Yayoi Ando
- Research Management Division, Clinical Research Support Office, National Cancer Center Hospital, Tokyo, Japan
| | - Natsuko Okita
- Research Management Division, Clinical Research Support Office, National Cancer Center Hospital, Tokyo, Japan
| | - Taro Shibata
- Biostatistics Division, Center for Research Administration and Support, National Cancer Center, Tokyo, Japan
| | - Kenichi Nakamura
- Department of International Clinical Development, National Cancer Center Hospital, Tokyo, Japan
- Research Management Division, Clinical Research Support Office, National Cancer Center Hospital, Tokyo, Japan
| | - Noboru Yamamoto
- Department of Experimental Therapeutics, National Cancer Center Hospital, Tokyo, Japan
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