PMID- 32474564 OWN - NLM STAT- MEDLINE DCOM- 20200916 LR - 20201030 IS - 1423-0232 (Electronic) IS - 0030-2414 (Print) IS - 0030-2414 (Linking) VI - 98 IP - 9 DP - 2020 TI - Oral S-1 with 24-h Infusion of Irinotecan plus Bevacizumab versus FOLFIRI plus Bevacizumab as First-Line Chemotherapy for Metastatic Colorectal Cancer: An Open-Label Randomized Phase II Trial. PG - 637-642 LID - 10.1159/000507293 [doi] AB - BACKGROUND: FOLFIRI plus bevacizumab have been widely used as first-line treatment for metastatic colorectal cancer (mCRC). Pharmacokinetics and pharmacodynamics suggested a low dose of irinotecan given as a long-term infusion is expected to enhance antitumor activity. We conducted a randomized phase II study to compare oral S-1 with a 24-h infusion of irinotecan plus bevacizumab versus FOLFIRI plus bevacizumab. METHODS: The subjects comprised 120 chemotherapy-naive patients with mCRC. The study group received a 24-h infusion of irinotecan at a dose of 125 mg/m2 on days 1 and 15, combined with oral S-1 80 mg/m2 on days 1-14 (24h-SIRI/B). The FOLFIRI/B group received irinotecan at a dose of 150 mg/m2, 5-fluorouracil given at a dose of 400 mg/m2 as a bolus injection and at a dose of 2,400 mg/m2 as a 46-h infusion, and 200 mg/m2 leucovorin on days 1 and 15. Bevacizumab was given at a dose of 5.0 mg/kg on days 1 and 15 in both groups. Treatment was repeated every 4 weeks. The primary endpoint was 1-year progression-free survival (PFS). Secondary endpoints were PFS, response rates (RR), overall survival (OS), and adverse events (AEs). RESULTS: From December 2013 through January 2018, 120 patients were randomly assigned, 61 patients to the 24h-SIRI/B and 59 patients to the FOLFIRI/B. The median follow-up period was 22.8 months. The 1-year PFS rate was 43.14% in the 24h-SIRI/B arm and 19.15% in the FOLFIRI/B arm (HR = 0.312 [95%CI 0.13-0.78], p = 0.01). The median PFS was 10.2 months (95%CI 8.8-14.3) and 10.0 months (95%CI 7.4-11.0), and the median OS was 29.7 months (95%CI 22.9-43.9) and 28.8 months (95%CI 18.4-ND), respectively (p = 0.3758, p = 0.8234). The overall RR was 86.3 and 61.7%, respectively (p = 0.0053). AEs were similar. CONCLUSIONS: Our results show that the 24h-SIRI/B regimen is an effective and reasonably well-tolerated regimen for the first-line treatment of mCRC. CI - (c) 2020 The Author(s) Published by S. Karger AG, Basel. FAU - Sadahiro, Sotaro AU - Sadahiro S AD - Department of Surgery, Tokai University, School of Medicine, Isehara, Japan, sadahiro@is.icc.u-tokai.ac.jp. FAU - Suzuki, Toshiyuki AU - Suzuki T AD - Department of Surgery, Tokai University, School of Medicine, Isehara, Japan. FAU - Okada, Kazutake AU - Okada K AD - Department of Surgery, Tokai University, School of Medicine, Isehara, Japan. FAU - Saito, Gota AU - Saito G AD - Department of Surgery, Tokai University, School of Medicine, Isehara, Japan. FAU - Miyakita, Hiroshi AU - Miyakita H AD - Department of Surgery, Tokai University, School of Medicine, Isehara, Japan. FAU - Ogimi, Takashi AU - Ogimi T AD - Department of Surgery, Tokai University, School of Medicine, Isehara, Japan. FAU - Chan, Lin Fung AU - Chan LF AD - Department of Surgery, Tokai University, School of Medicine, Isehara, Japan. FAU - Kamei, Yutaro AU - Kamei Y AD - Department of Surgery, Tokai University, School of Medicine, Isehara, Japan. LA - eng PT - Clinical Trial, Phase II PT - Journal Article PT - Randomized Controlled Trial DEP - 20200529 PL - Switzerland TA - Oncology JT - Oncology JID - 0135054 RN - 0 (Drug Combinations) RN - 150863-82-4 (S 1 (combination)) RN - 1548R74NSZ (Tegafur) RN - 2S9ZZM9Q9V (Bevacizumab) RN - 5VT6420TIG (Oxonic Acid) RN - Q573I9DVLP (Leucovorin) RN - U3P01618RT (Fluorouracil) RN - XT3Z54Z28A (Camptothecin) RN - IFL protocol SB - IM MH - Administration, Oral MH - Adult MH - Aged MH - Antineoplastic Combined Chemotherapy Protocols/*administration & dosage MH - Bevacizumab/administration & dosage MH - Camptothecin/administration & dosage/analogs & derivatives MH - Colorectal Neoplasms/*drug therapy MH - Drug Administration Schedule MH - Drug Combinations MH - Female MH - Fluorouracil/administration & dosage MH - Humans MH - Infusions, Intravenous MH - Leucovorin/administration & dosage MH - Male MH - Middle Aged MH - Oxonic Acid/administration & dosage MH - Progression-Free Survival MH - Survival Rate MH - Tegafur/administration & dosage MH - Young Adult PMC - PMC7592907 OTO - NOTNLM OT - 24-h infusion OT - Bevacizumab OT - Colorectal cancer OT - FOLFIRI OT - Irinotecan OT - Phase II study OT - S-1 COIS- All authors have no potential conflicts of interest to declare. EDAT- 2020/06/01 06:00 MHDA- 2020/09/17 06:00 PMCR- 2020/05/29 CRDT- 2020/06/01 06:00 PHST- 2020/02/18 00:00 [received] PHST- 2020/03/16 00:00 [accepted] PHST- 2020/06/01 06:00 [pubmed] PHST- 2020/09/17 06:00 [medline] PHST- 2020/06/01 06:00 [entrez] PHST- 2020/05/29 00:00 [pmc-release] AID - 000507293 [pii] AID - ocl-0098-0637 [pii] AID - 10.1159/000507293 [doi] PST - ppublish SO - Oncology. 2020;98(9):637-642. doi: 10.1159/000507293. Epub 2020 May 29.