Abstract
Purpose
Immune-checkpoint inhibitors (ICIs) represent the standard of care for platinum-pretreated advanced non-small cell lung cancer patients. Patients treated with ICIs may experience immune-related adverse events (irAEs), that might reflect antitumor responses. Here we evaluated nivolumab efficacy according to the development of irAEs.
Methods
We conducted a multicenter retrospective study of patients with advanced NSCLC treated with nivolumab between October 2013 and September 2017. IrAEs were defined as AEs having immunological basis that required intensive monitoring and interventions.
Results
Among 195 patients [median (range) age, 63 (30–84) years; 128 men (65.6%), 67 women (34.4%)], irAEs were observed in 85 patients (43.6%), including 15 patients (7.6%) with grade 3 or 4 events. Median PFS was 5.7 months in irAEs group compared to 2.0 months of no-irAEs group [HR: 0.41 (95% CI 0.3–0.57), P < 0.0001]. Median OS was 17.8 months compared to 4.0 months of no-irAEs group [HR: 0.33 (95% CI 0.23–0.47), P < 0.0001]. IrAEs were significantly associated with improved clinical outcome in 12- and 6-week landmark analysis. Patients who developed ≥ 2 irAEs during treatment (n: 37) had a significantly longer median PFS and OS compared to those with one (n: 48) or none AEs (n: 110) (PFS: 8.5 months vs. 4.6 vs. 2.0, P < 0.0001; OS: 26.8 months vs. 11.9 vs. 4.0, P < 0.0001). Multivariable analysis revealed that irAEs were positively associated with PFS [HR: 0.48 (95% CI 0.34–0.67), P < 0.0001] and OS [HR: 0.38 (95% CI 0.26–0.56), P < 0.0001].
Conclusion
In this study we confirmed that the development of irAEs was a strong predictor of survival outcomes in NSCLC patients treated with nivolumab monotherapy in landmark and multivariable models. Patients who experienced ≥ 2 irAEs had a more pronounced survival benefit compared to those with 1 irAE further suggesting a mechanistic association between irAEs and immunotherapy efficacy.
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Acknowledgements
This work was selected as Poster Presentation at 2018 American Society of Clinical Oncology (ASCO) Annual Meeting (Chicago, 2018) and as Oral Presentation at World Conference on Lung Cancer (WCLC) (Toronto, 2018).
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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Informed consent was obtained from all individual participants included in the study.
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Ricciuti, B., Genova, C., De Giglio, A. et al. Impact of immune-related adverse events on survival in patients with advanced non-small cell lung cancer treated with nivolumab: long-term outcomes from a multi-institutional analysis. J Cancer Res Clin Oncol 145, 479–485 (2019). https://doi.org/10.1007/s00432-018-2805-3
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DOI: https://doi.org/10.1007/s00432-018-2805-3