한빛사논문
Prof Yoon-Koo Kang MDa, Prof Li-Tzong Chen MDb,c, Prof Min-Hee Ryu MDa, Prof Do-Youn Oh MDd,e, Sang Cheul Oh MDf, Prof Hyun Cheol Chung MDg, Prof Keun-Wook Lee MDh, Takeshi Omori MDi, Kohei Shitara MDj, Prof Shinichi Sakuramoto MDk, Prof Ik-Joo Chung MDl, Kensei Yamaguchi MDm, Ken Kato MDn, Prof Sun Jin Sym MDo, Shigenori Kadowaki MDp, Kunihiro Tsuji MDq, Jen-Shi Chen MDr, Li-Yuan Bai MDs, Sung-Yong Oh MDt, Yasuhiro Choda MDu, Hisateru Yasui MDv, Kentaro Takeuchi MScw, Yoshinori Hirashima MDw, Shunsuke Hagihara MScx, Narikazu Boku MDn,*
aDepartment of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
bNational Institute of Cancer Research, National Health Research Institutes, and National Cheng Kung University Hospital, National Cheng Kung University, Tainan, Taiwan
cKaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
dDepartment of Internal Medicine, Seoul National University Hospital, Cancer Research Institute, Seoul National University College of Medicine, Seoul, South Korea
eIntegrated Major in Innovative Medical Science, Seoul National University Graduate School, Seoul, Korea
fDivision of Hematology and Oncology, Department of Internal Medicine, College of Medicine, Korea University, Seoul, South Korea
gDivision of Medical Oncology, Yonsei Cancer Center, Song-Dang Institute for Cancer Research, Yonsei University College of Medicine, Yonsei University Health System, Seoul, South Korea
hDivision of Hematology and Medical Oncology, Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, South Korea
iDepartment of Gastroenterological Surgery, Osaka International Cancer Institute, Osaka, Japan
jDepartment of Gastroenterology and Gastrointestinal Oncology, National Cancer Center Hospital East, Kashiwa, Japan
kDepartment of Gastroenterological Surgery, Saitama Medical University International Medical Center, Hidaka, Japan
lDepartment of Hematology-Oncology, Chonnam National University Hwasun Hospital, Chonnam National University College of Medicine, Hwasun, South Korea
mDepartment of Gastroenterological Chemotherapy, The Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo, Japan
nDivision of Gastrointestinal Medical Oncology, National Cancer Center Hospital, Tokyo, Japan
oDepartment of Internal Medicine, Division of Medical Oncology, Gachon University Gil Medical Center, Incheon, South Korea
pDepartment of Clinical Oncology, Aichi Cancer Center Hospital, Nagoya, Japan
qDepartment of Medical Oncology, Ishikawa Prefectural Central Hospital, Kanazawa, Japan
rDivision of Hematology and Oncology, Department of Internal Medicine, Linkou Chang Gung Memorial Hospital, Chang Gung University, Taoyuan, Taiwan
sDivision of Hematology and Oncology, Department of Internal Medicine, China Medical University Hospital, and China Medical University, Taichung, Taiwan
tDepartment of Hemato-Oncology, Dong-a University Hospital, Busan, South Korea
uDepartment of Surgery, Hiroshima Citizens Hospital, Hiroshima, Japan
vDepartment of Medical Oncology, Kobe City Medical Center General Hospital, Hyogo, Japan
wDepartment of Oncology Clinical Development Planning, Ono Pharmaceutical, Osaka, Japan
xDepartment of Statistical Analysis, Ono Pharmaceutical, Osaka, Japan
*Corresponding author.
Abstract
Background
The additive or synergistic sustained antitumour effect of immune checkpoint inhibitors in combination with oxaliplatin-based chemotherapy has previously been reported. We investigated the efficacy of nivolumab plus oxaliplatin-based chemotherapy versus placebo plus oxaliplatin-based chemotherapy as first-line therapy for patients with HER2-negative, unresectable advanced or recurrent gastric or gastro-oesophageal junction cancer.
Methods
We did a randomised, multicentre, double-blind, placebo-controlled, phase 2–3 trial (ATTRACTION-4) at 130 centres (hospitals, cancer centres, and medical centres) across Japan, South Korea, and Taiwan. We enrolled patients aged 20 years and older with previously untreated (except for neoadjuvant or adjuvant chemotherapy completed ≥180 days before recurrence), HER2-negative, unresectable, advanced or recurrent gastric or gastro-oesophageal junction cancer (regardless of PD-L1 expression), at least one measurable lesion per Response Evaluation Criteria in Solid Tumours guidelines (version 1.1), and a baseline Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1. Patients were randomly assigned (1:1) to chemotherapy every 3 weeks (intravenous oxaliplatin 130 mg/m2 on day 1 plus either oral S-1 40 mg/m2 [SOX] or oral capecitabine 1000 mg/m2 [CAPOX], twice daily on days 1–14), in addition to either 360 mg nivolumab intravenously every 3 weeks (nivolumab plus chemotherapy group) or placebo (placebo plus chemotherapy group). Randomisation was done using an interactive web response system with block sizes of four and stratified by intensity of PD-L1 expression, ECOG performance status score, disease status, and geographical region. Patients, investigators, and the study sponsor were masked to treatment assignment. The primary endpoints were centrally assessed progression-free survival and overall survival in the intention-to-treat population, which included all randomly assigned patients. Safety was assessed in all patients who received at least one dose of the assigned treatment. This trial is registered with ClinicalTrials.gov, NCT02746796. Trial recruitment is complete and follow-up is ongoing.
Findings
Between March 23, 2017, and May 10, 2018, 724 patients were randomly assigned to treatment: 362 patients to the nivolumab plus chemotherapy group and 362 to the placebo plus chemotherapy group. At the time of data cutoff on Oct 31, 2018, with a median follow-up of 11·6 months (IQR 8·7–14·1), median progression-free survival at a prespecified interim analysis was 10·45 months (95% CI 8·44–14·75) in the nivolumab plus chemotherapy group and 8·34 months (6·97–9·40) in the placebo plus chemotherapy group (hazard ratio [HR] 0·68; 98·51% CI 0·51–0·90; p=0·0007). At the time of data cutoff on Jan 31, 2020, with a median follow-up of 26·6 months (IQR 24·1–29·0), median overall survival at the final analysis was 17·45 months (95% CI 15·67–20·83) in the nivolumab plus chemotherapy group and 17·15 months (15·18–19·65) in the placebo plus chemotherapy group (HR 0·90; 95% CI 0·75–1·08; p=0·26). The most common treatment-related grade 3–4 adverse events were neutrophil count decreased (71 [20%] of 359 patients in the nivolumab plus chemotherapy group vs 57 [16%] of 358 patients in the placebo plus chemotherapy group) and platelet count decreased (34 [9%] vs 33 [9%]). Treatment-related serious adverse events of any grade were observed in 88 (25%) patients in the nivolumab plus chemotherapy group and in 51 (14%) in the placebo plus chemotherapy group, of which the most common was decreased appetite (18 [5%] vs ten [3%]). Six treatment-related deaths occurred: three in the nivolumab plus chemotherapy group (one each of febrile neutropenia, hepatic failure, and sudden death) and three in the placebo plus chemotherapy group (one each of sepsis, haemolytic anaemia, and interstitial lung disease).
Interpretation
Nivolumab combined with oxaliplatin-based chemotherapy significantly improved progression-free survival, but not overall survival, in Asian patients with untreated, HER2-negative, unresectable advanced or recurrent gastric or gastro-oesophageal junction cancer, and could potentially be a new first-line treatment option for these patients.
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