Dataset Information

Exploration of predictors of benefit from nivolumab monotherapy for patients with pretreated advanced gastric and gastroesophageal junction cancer: post hoc subanalysis from the ATTRACTION-2 study.

ABSTRACT:

Background

The phase 3 ATTRACTION-2 study demonstrated that nivolumab monotherapy was superior to placebo for patients with pretreated advanced gastric or gastroesophageal junction cancer, but early progression of tumors in some patients was of concern.

Methods

This post hoc analysis statistically explored the baseline characteristics of the ATTRACTION-2 patients and extracted a single-factor and double-factor combinations associated with early disease progression or early death. In the extracted patient subgroups, the 3-year restricted mean survival times of progression-free survival and overall survival were compared between the nivolumab and placebo arms.

Results

Two single factors (age and peritoneal metastasis) were extracted as independent predictors of early progression, but none of them, as a single factor, stratified patients into two subgroups with significant differences in restricted mean survival time. In contrast, two double-factor combinations (serum sodium level and white blood cell count; serum sodium level and neutrophil-lymphocyte ratio) stratifying patients into two subgroups with significant differences in the restricted mean survival time were extracted. Additional exploratory analysis of a triple-factor combination showed that patients aged < 60 years with peritoneal metastasis and low serum sodium levels (approximately 7% of all patients) might receive less benefit from nivolumab, and patients aged ≥ 60 years with no peritoneal metastasis and normal serum sodium levels might receive higher benefit.

Conclusions

A combination of age, peritoneal metastasis, and serum sodium level might predict benefit from nivolumab as salvage therapy in advanced gastric or gastroesophageal junction cancer patients, especially less benefit for patients having all three risk factors.

SUBMITTER: Kang YK

PROVIDER: S-EPMC8732926 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature

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Publications

Exploration of predictors of benefit from nivolumab monotherapy for patients with pretreated advanced gastric and gastroesophageal junction cancer: post hoc subanalysis from the ATTRACTION-2 study.

Kang Yoon-Koo YK Morita Satoshi S Satoh Taroh T Ryu Min-Hee MH Chao Yee Y Kato Ken K Chung Hyun Cheol HC Chen Jen-Shi JS Muro Kei K Kang Won Ki WK Yeh Kun-Huei KH Yoshikawa Takaki T Oh Sang Cheul SC Bai Li-Yuan LY Tamura Takao T Lee Keun-Wook KW Hamamoto Yasuo Y Kim Jong Gwang JG Chin Keisho K Oh Do-Youn DY Minashi Keiko K Cho Jae Yong JY Tsuda Masahiro M Sameshima Hiroki H Chen Li-Tzong LT Boku Narikazu N

Gastric cancer : official journal of the International Gastric Cancer Association and the Japanese Gastric Cancer Association 20210904 1

<h4>Background</h4>The phase 3 ATTRACTION-2 study demonstrated that nivolumab monotherapy was superior to placebo for patients with pretreated advanced gastric or gastroesophageal junction cancer, but early progression of tumors in some patients was of concern.<h4>Methods</h4>This post hoc analysis statistically explored the baseline characteristics of the ATTRACTION-2 patients and extracted a single-factor and double-factor combinations associated with early disease progression or early death. ...[more]

PMID: 34480657

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Project description:BackgroundNivolumab-based therapies are efficacious with acceptable safety in patients with gastric cancer (GC) and gastroesophageal junction cancer (GEJC). Novel nivolumab-based combination immunotherapies may offer enhanced efficacy in these indications. FRACTION-GC was a signal-seeking, randomized, open-label, phase II adaptive-design trial assessing efficacy and safety of nivolumab in combination with ipilimumab [cytotoxic T lymphocyte antigen-4 (CTLA-4) antibody], relatlimab (lymphocyte-activation gene 3 antibody), or IDO1i (BMS986205, an indoleamine-2,3-dioxygenase-1 inhibitor) in patients with unresectable, advanced/metastatic GC/GEJC.Patients and methodsPreviously treated patients with GC/GEJC were randomized to receive nivolumab + ipilimumab, nivolumab + relatlimab, or nivolumab + IDO1i across two tracks: anti-programmed death-(ligand) 1/anti-CTLA-4-naïve (track 1) and -experienced (track 2). Primary endpoints were objective response rate (ORR) by investigator per RECIST v1.1, duration of response, and progression-free survival (PFS) rate at 24 weeks. Secondary endpoint was safety.ResultsEighty-one patients in track 1 and 81 in track 2 received one combination therapy. With a median follow-up of 50.2 months, ORR [95% confidence interval (CI)] by investigator for nivolumab + ipilimumab, nivolumab + relatlimab, and nivolumab + IDO1i in track 1 was 4% (0.1% to 21.9%), 5% (0.1% to 24.9%), and 13% (4.4% to 28.1%), and for track 2 was 9% (1.1% to 28.0%), 6% (0.7% to 18.7%), and 0% (0% to 15.4%), respectively. PFS rate at 24 weeks (95% CI) was 24% (11% to 39%) for nivolumab + IDO1i track 1, 17% (16% to 32%) for nivolumab + relatlimab track 2, and not estimable for other treatment arms. Grade 3/4 treatment-related adverse events were reported in 22%, 5%, and 18% of patients receiving nivolumab + ipilimumab, nivolumab + relatlimab, and nivolumab + IDO1i in track 1 and in 35%, 11%, and 18% of patients in track 2, respectively. No treatment-related deaths were reported.ConclusionsWhile ORR did not meet prespecified expansion criteria in any treatment arm, the safety profile of the combinations was manageable. FRACTION-GC represents a novel adaptive protocol for testing multiple combination immunotherapies.

Project description:IntroductionEsophageal and gastroesophageal junction cancer (EC/GEJC) is a poor prognosis disease with a high risk of recurrence even in patients curatively resected. Adjuvant nivolumab is currently used for patients with completely resected (R0) EC/GEJC who have residual pathologic disease following prior neoadjuvant chemoradiotherapy. This study aimed to determine the cost effectiveness of nivolumab in this indication in France according to the collective perspective excluding indirect costs.Materials and methodsA simplified four-health-state semi-Markov model was developed to model EC/GEJC patients who have residual disease after neoadjuvant chemoradiotherapy followed by R0 over a 15-year time horizon, comparing adjuvant nivolumab versus surveillance, which was the recommended French clinical practice before immunotherapy arrival. Time-to-recurrence (TTR) from CheckMate 577 was used to inform transition from disease-free to post-recurrence health state; patients who recurred were split according to the distribution of type of recurrence observed during the trial. Post-recurrence survival (PRS) according to the type of recurrence was derived from a real-world registry.ResultsAdjuvant treatment with nivolumab led to an incremental survival gain of 1.19 years (+ 34%), mostly in the disease-free state, an incremental cost of €48,634 and QALY of 0.98 resulting in an incremental cost-utility ratio (ICUR) of €49,572/QALY with limited uncertainty. 'Cure assumption' at 5 years had an important impact on the results (€41,115/QALY; - 17%), as that tends to increase life-years and QALYs while costs remain the same. Probabilistic sensitivity analyses confirmed reference ICUR (€52,542/QALY) with 80% probability of nivolumab being cost effective at a willingness-to-pay threshold of €75,000/QALY.ConclusionsOur analysis suggests that adjuvant nivolumab is cost effective in the treatment of EC/GEJC patients who have residual disease after neoadjuvant CRT followed by R0 resection. Compared with previously evaluated cost-effectiveness analyses for other immune-checkpoint inhibitors indicated in metastatic settings, ICUR appears particularly low in this early setting thanks to the important impact on health outcomes and capped treatment duration.

Project description:BackgroundNivolumab is approved as an option for third- or later-line treatment of advanced gastric/gastroesophageal junction (G/GEJ) cancer in several countries after ATTRACTION-2. To further improve the therapeutic efficacy of first-line therapy, exploration of a nivolumab-chemotherapy combination is warranted. In part 1 (phase II) of ATTRACTION-4, the safety and efficacy of nivolumab combined with S-1 plus oxaliplatin (SOX) or capecitabine plus oxaliplatin (CapeOX) as first-line therapy for unresectable advanced or recurrent human epidermal growth factor receptor 2 (HER2)-negative G/GEJ cancer were evaluated.Patients and methodsPatients were randomized (1 : 1) to receive nivolumab (360 mg intravenously every 3 weeks) plus SOX (S-1, 40 mg/m2 orally twice daily for 14 days followed by 7 days off; oxaliplatin, 130 mg/m2 intravenously on day 1 every 3 weeks) or CapeOX (capecitabine, 1000 mg/m2 orally twice daily for 14 days followed by 7 days off; oxaliplatin, 130 mg/m2 intravenously on day 1 every 3 weeks) until disease progression, unacceptable toxicity, or consent withdrawal.ResultsOf 40 randomized patients, 39 (nivolumab plus SOX, 21; nivolumab plus CapeOX, 18) and 38 (21 and 17, respectively) comprised the safety and efficacy populations, respectively. Most frequent (>10%) grade 3/4 treatment-related adverse events were neutropenia (14.3%) in the nivolumab plus SOX group, and neutropenia (16.7%), anemia, peripheral sensory neuropathy, decreased appetite, type 1 diabetes mellitus, and nausea (11.1% each) in the nivolumab plus CapeOX group. No treatment-related death occurred. Objective response rate was 57.1% (95% confidence interval 34.0-78.2) with nivolumab plus SOX and 76.5% (50.1-93.2) with nivolumab plus CapeOX. Median overall survival was not reached (NR) in both groups. Median progression-free survival was 9.7 months (5.8-NR) and 10.6 months (5.6-12.5), respectively.ConclusionNivolumab combined with SOX/CapeOX was well tolerated and demonstrated encouraging efficacy for unresectable advanced or recurrent HER2-negative G/GEJ cancer. ATTRACTION-4 has proceeded to part 2 (phase III) to compare nivolumab plus SOX/CapeOX versus placebo plus SOX/CapeOX.Clinicaltrials.gov idNCT02746796.

Dataset Information

Exploration of predictors of benefit from nivolumab monotherapy for patients with pretreated advanced gastric and gastroesophageal junction cancer: post hoc subanalysis from the ATTRACTION-2 study.

Background

Methods

Results

Conclusions

Publications

Exploration of predictors of benefit from nivolumab monotherapy for patients with pretreated advanced gastric and gastroesophageal junction cancer: post hoc subanalysis from the ATTRACTION-2 study.

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