PMID- 28879519 OWN - NLM STAT- MEDLINE DCOM- 20190125 LR - 20221207 IS - 1573-0646 (Electronic) IS - 0167-6997 (Linking) VI - 36 IP - 2 DP - 2018 Apr TI - Safety, tolerability, and pharmacokinetic profile of dabrafenib in Japanese patients with BRAF (V600) mutation-positive solid tumors: a phase 1 study. PG - 259-268 LID - 10.1007/s10637-017-0502-8 [doi] AB - Background Dabrafenib is a BRAF inhibitor that has demonstrated clinical activity with a good tolerability profile in patients with BRAF (V600E) mutated metastatic melanoma. This study evaluated the safety and tolerability, pharmacokinetics and preliminary efficacy of dabrafenib in Japanese patients. Methods This phase I, open-label, dose escalation study was conducted in 12 Japanese patients with BRAF (V600) mutation positive solid tumours. Primary endpoint was safety, assessed by monitoring and recording of all adverse events (AEs), serious AEs, drug-related AEs; secondary endpoints were pharmacokinetic profiles and efficacy measured by tumour response. This study is registered with ClinicalTrials.gov, number NCT01582997. Results Of the 12 patients enrolled, 3 each received 75 mg and 100 mg dabrafenib while 6 received 150 mg dabrafenib twice daily orally. Melanoma and thyroid cancer were the primary tumours reported in 11 (92%) and 1 (8%) patients respectively. Most AEs were grade 1 or 2 and considered related to study treatment. Most common AEs reported in the 12 patients were alopecia in 7 (58%); pyrexia, arthralgia and leukopenia in 6 (50%) each, hyperkeratosis and nausea in 4 (33%) each. Partial response as best overall response was reported in 7 of 12 (58%) patients and in 6 (55%) with malignant melanoma. No dose-limiting toxicity (DLTs) were reported during the DLT evaluation periods. Conclusions Dabrafenib was well tolerated and rapidly absorbed administered as single- or multiple dose. Comparable safety and pharmacokinetic profiles were observed compared with non-Japanese patients. Dabrafenib has promising clinical activity in Japanese patients with BRAF mutated malignant melanoma. FAU - Fujiwara, Yutaka AU - Fujiwara Y AD - Department of Experimental Therapeutics, National Cancer Center Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan. yutakafu@ncc.go.jp. FAU - Yamazaki, Naoya AU - Yamazaki N AD - Department of Dermatologic Oncology, National Cancer Center Hospital, Tokyo, Japan. FAU - Kiyohara, Yoshio AU - Kiyohara Y AD - Dermatology Division, Shizuoka Cancer Center Hospital, Shizuoka, Japan. FAU - Yoshikawa, Shusuke AU - Yoshikawa S AD - Dermatology Division, Shizuoka Cancer Center Hospital, Shizuoka, Japan. FAU - Yamamoto, Noboru AU - Yamamoto N AD - Department of Experimental Therapeutics, National Cancer Center Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan. FAU - Tsutsumida, Arata AU - Tsutsumida A AD - Department of Dermatologic Oncology, National Cancer Center Hospital, Tokyo, Japan. FAU - Nokihara, Hiroshi AU - Nokihara H AD - Department of Experimental Therapeutics, National Cancer Center Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan. FAU - Namikawa, Kenjiro AU - Namikawa K AD - Department of Dermatologic Oncology, National Cancer Center Hospital, Tokyo, Japan. FAU - Mukaiyama, Akihira AU - Mukaiyama A AD - Development Department, Novartis Pharma K.K, Tokyo, Japan. FAU - Zhang, Fanghong AU - Zhang F AD - Development Department, Novartis Pharma K.K, Tokyo, Japan. FAU - Tamura, Tomohide AU - Tamura T AD - Thoracic Center, St. Luke's International Hospital, Tokyo, Japan. LA - eng SI - ClinicalTrials.gov/NCT01582997 PT - Clinical Trial, Phase I PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20170907 PL - United States TA - Invest New Drugs JT - Investigational new drugs JID - 8309330 RN - 0 (Imidazoles) RN - 0 (Oximes) RN - EC 2.7.11.1 (Proto-Oncogene Proteins B-raf) RN - QGP4HA4G1B (dabrafenib) SB - IM MH - Adult MH - *Asian People MH - Dose-Response Relationship, Drug MH - Female MH - Humans MH - Imidazoles/administration & dosage/*adverse effects/*pharmacokinetics/therapeutic use MH - Male MH - Middle Aged MH - Mutation/*genetics MH - Neoplasms/*drug therapy/*genetics MH - Oximes/administration & dosage/*adverse effects/*pharmacokinetics/therapeutic use MH - Proto-Oncogene Proteins B-raf/*genetics MH - Treatment Outcome OTO - NOTNLM OT - BRAF V600 OT - Dabrafenib OT - Japanese OT - Malignant melanoma OT - Mutation OT - Solid tumor EDAT- 2017/09/08 06:00 MHDA- 2019/01/27 06:00 CRDT- 2017/09/08 06:00 PHST- 2017/07/12 00:00 [received] PHST- 2017/08/11 00:00 [accepted] PHST- 2017/09/08 06:00 [pubmed] PHST- 2019/01/27 06:00 [medline] PHST- 2017/09/08 06:00 [entrez] AID - 10.1007/s10637-017-0502-8 [pii] AID - 10.1007/s10637-017-0502-8 [doi] PST - ppublish SO - Invest New Drugs. 2018 Apr;36(2):259-268. doi: 10.1007/s10637-017-0502-8. Epub 2017 Sep 7.