Abstract
Background
Data regarding the efficacy and safety profiles of immune checkpoint inhibitors (ICIs) for metastatic renal cell carcinoma (mRCC) trial-ineligible patients in the real world remain unclear.
Objectives
The aim of this study was to clarify the impact of trial eligibility on ICI-based combination therapy for mRCC.
Patients and Methods
We collected clinical data of mRCC patients receiving ICIs since 2016, and 222 patients were registered. Among these patients, we evaluated 93 patients treated with ICI-based combination therapy, including nivolumab plus ipilimumab, pembrolizumab plus axitinib, or avelumab plus axitinib, as first-line therapy. Patients were classified into the trial-ineligible group when they had at least one of the following factors at the time of treatment initiation: Karnofsky performance status (KPS) < 70%, hemoglobin level < 9.0 g/dL, estimated glomerular filtration rate (eGFR) < 40 mL/min/1.73 m2, platelet count < 100,000/µL, neutrophil count < 1500/µL, non-clear cell histology, or brain metastasis. The remaining patients were classified into the trial-eligible group.
Results
Forty-eight patients (52%) were classified into the trial-ineligible group. The frequency of patients with trial-ineligible factors was highest for low eGFR (n = 20, 45%), followed by non-clear cell histology (n = 17, 36%) and low KPS score (n = 12, 25%). There was no significant difference in progression-free survival (median: 24.0 vs. 11.0 months, p = 0.416), overall survival (1-year rate: 87.0% vs. 85.3%, p = 0.634), or objective response rate (52% vs. 42%, p = 0.308) between the trial-eligible and -ineligible patients. The incidence rate of adverse events was higher in the trial-eligible patients than in the trial-ineligible patients (91% vs. 75%, p = 0.0397); however, the rate of grade 3 or higher adverse events was comparable between the two groups (42% vs. 40%, p = 0.796).
Conclusions
There are many trial-ineligible patients in the real world. Nevertheless, the efficacy and safety of ICI-based combination therapy in trial-ineligible patients were non-inferior compared with those of trial-eligible patients.
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Acknowledgments
The authors thank Ms. Nobuko Hata (Department of Urology, Tokyo Women’s Medical University) for her secretarial work.
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No external funding was used in the preparation of this article.
Conflicts of interest
Toshio Takagi received honoraria from Bristol-Myers Squibb and Ono Pharmaceutical. Tsunenori Kondo received honoraria from Pfizer, Novartis, Bristol-Myers Squibb, and Ono Pharmaceutical. Yuki Nemoto, Hiroki Ishihara, Kazutaka Nakamura, Hidekazu Tachibana, Hironori Fukuda, Kazuhiko Yoshida, Hirohito Kobayashi, Junpei Iizuka, Hiroaki Shimmura, Yasunobu Hashimoto, and Kazunari Tanabe have no conflicts of interest relevant to the contents of this article.
Ethics approval
The study protocol was approved by the Institutional Ethics Review Board of each institution (Tokyo Women’s Medical University, Tokyo Women’s Medical University Adachi Medical Center, Saiseikai Kawaguchi General Hospital, Saiseikai Kurihashi Hospital, and Jyoban Hospital; ID: 2020-0009). The present study was performed according to the guidelines of the 1964 Declaration of Helsinki and its later amendments. Owing to the retrospective observational nature of this study, the need for informed consent was waived.
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All authors contributed to this study’s conception and design, data collection, and analysis. The first draft of the manuscript was written by Yuki Nemoto and all authors commented on the previous drafts of the manuscript. All authors read and approved the final version of the manuscript.
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Nemoto, Y., Ishihara, H., Nakamura, K. et al. Efficacy and Safety of Immunotherapy-Based Combinations as First-Line Therapy for Metastatic Renal Cell Carcinoma in Patients Who Do Not Meet Trial Eligibility Criteria. Targ Oncol 17, 475–482 (2022). https://doi.org/10.1007/s11523-022-00896-9
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DOI: https://doi.org/10.1007/s11523-022-00896-9