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자료유형
학술저널
저자정보
윤지선 (서울대학교병원) 강서영 (서울대학교병원) 이경훈 (서울대학교병원) 천기정 (서울대학교) 오도연 (서울대학교)
저널정보
대한암학회 Cancer Research and Treatment Cancer Research and Treatment 제53권 제2호
발행연도
2021.1
수록면
471 - 479 (9page)

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PurposeHypoxia is widely known as one of the mechanisms of chemoresistance and as an environmental condition which triggers invasion and metastasis of cancer. Evofosfamide is a hypoxia-activated prodrug of the cytotoxin bromo-isophosphoramide mustard conjugated with 2-nitroimidazole. Biliary tract cancer (BTC) is known to contain large hypoxic area. This study evaluated the efficacy and safety of evofosfamide as a second-line treatment of advanced BTC. Materials and MethodsPatients received evofosfamide at a dose of 340 mg/m2 on days 1, 8, and 15 of every 28-day cycle. Primary end-point was progression-free survival (PFS) rate at 4-months (4m-PFSR). Secondary end-points included overall survival (OS), PFS, disease control rate (DCR), metabolic response by 18F-fluorodeoxyglucose positron emission tomography (PET), hypoxic parameters evaluated by 18F-fluoromisonidazole (FMISO) PET and toxicity.ResultsTwenty patients were treated with evofosfamide, with 16 response-evaluable patients. There was no objective response; stable disease was observed in nine patients, with a DCR of 56.25%. 4m-PFSR was 40.6%. Median PFS was 3.60 months (95% confidence interval [CI], 1.68 to 5.52). Median OS was 6.37 months (95% CI, 3.94 to 8.79). Reduction of tumor metabolic activity was observed in eight of 15 patients (53.3%). High baseline hypoxic parameters were associated with poor PFS. Change of hypoxic parameters between pretreatment and post-treatment reflected hypoxic-activated drug response. There was no treatment-related death.ConclusionEvofosfamide as second-line treatment of advanced BTC showed acceptable safety and comparable efficacy to other agents. Changes in volumetric parameters measured with FMISO PET, showing the degree of tumor hypoxia, reflected the response to evofosfamide based on the mode of action.

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