Abstract
Objectives
Early clinical trials showed promising outcomes with immune-checkpoint inhibitors (ICI) in a subset of patients with relapsed small-cell lung carcinoma (SCLC). The aim of this retrospective analysis was to assess the efficacy and safety of ICI for relapsed SCLC in a real-world patient population.
Methods
Nine cancer centres in Switzerland contributed data to this cohort. Responses were assessed by the local investigators using standard RECIST v1.1 criteria. Progression-free survival (PFS) and overall survival (OS) were analysed by the Kaplan–Meier method. Associations between potential predictive markers and survival endpoints were probed by Cox proportional hazards.
Results
Forty-five patients were included in the analysis. Median age was 63 years, 73% were males and 18% had an ECOG performance status (PS) ≥ 2. ICIs were given as second-line treatment in 60%. Twenty-four patients (53%) received ipilimumab with nivolumab. Twenty-eight patients (62%) had undergone irradiation (RT) prior to or during ICI. Overall response rate (ORR) was 29% and median PFS and OS were 2.3 and 6.5 months, respectively. Median duration of response was 9 months (95% CI 2.8–NA). Five patients maintained their response for > 6 months, all of them receiving combination treatment. There were no new safety signals.
Conclusion
This is the first report of “real-world” data on ICI in relapsed SCLC also including patients with poor PS. Promising durable responses were observed. No biological prognostic marker could be identified.
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Abbreviations
- AE:
-
Adverse event
- CPS:
-
Composite proportion score
- CR:
-
Complete remission
- CT:
-
Computed tomography
- DCR:
-
Disease-control rate
- DOR:
-
Duration of response
- ICI:
-
Immune checkpoint inhibitors
- irAE:
-
Immune-related adverse events
- ORR:
-
Overall response rate
- OS:
-
Overall survival
- PD:
-
Progressive disease
- PFS:
-
Progression-free survival
- PD-L1:
-
Programmed death ligand 1
- PR:
-
Partial remission
- PS:
-
Performance status
- RECIST:
-
Response evaluation criteria in the solid tumours guidelines
- RT:
-
Radiotherapy
- SCLC:
-
Small-cell lung cancer
- SD:
-
Stable disease
- TMB:
-
Tumour mutational burden
- TPS:
-
Tumour proportion score
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Acknowledgements
Institutional grant was received by BMS for molecular analysis.
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Contributions
SS, LM and MF conceived and designed the study. SS, LM, AF, VB, SR, HB, PF, CB, DK, LW, WJ and AA collected and assembled the data. Data analysis and interpretation were done by the following authors: clinical data: SS, LM, SS (SämiSchär), MF; pathology: ID, WJ. SS, LM and MF were involved in overall interpretation. All authors were involved in manuscript writing. All authors gave the final approval of the manuscript.
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Conflict of interest
SS as the corresponding author and MF declare having received institutional funding from BMS for extended molecular analysis of this study. SS: grants (institutional): BMS, Astra Zeneca; honoraries for advisory boards (to the institution): Boehringer-Ingelheim, MSD; travel supplemort: MSD, Boehringer-Ingelheim, Takeda. LM: personal fees: Bristol Myers Squibb, AstraZeneca, Roche, Takeda, Merck Sharp and Dohme, Pfizer; non-financial support: Bristol Myers Squibb, AstraZeneca, Roche, Takeda, Merck Darmstadt. AF: personal fees: Roche, Pfizer, Astellas, BMS. SR: Grants: AstraZeneca, BMS, Merck Serono; honoraries for advisory boards (to the institution): AstraZeneca, BMS, Merck Serono, MSD, Roche, Novartis, Eli Lilly, Boehringer-Ingelheim, Eisai, Takeda, Bayer, Pfizer; serves as scientific advisor of the Federal Drug Commission of the Federal Office of Public Health. CB: consulting or advisory role: AstraZeneca, Pfizer, Roche, Takeda, Janssen-Cilag, Boehringer-Ingelheim; travel, accommodations/expenses: AstraZeneca, Takeda. AA: personal fees: BMS, Astra Zeneca, MSD, Takeda, Pfizer, Roche, Boehringer-Ingelheim; grants: Boehringer-Ingelheim. MF: grants BMS, Astra Zeneca (all institutional); honoraries for advisory boards (to the institution): BMS, MSD, Astra Zeneca, Boehringer-Ingelheim, Roche, Takeda.
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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. For this type of study, formal consent is not required. This article does not contain any studies with animals performed by any of the authors.
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Electronic supplementary material
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Supp. Figure A
PFS in patients with good versus poor performance status at start of ICI (PS 0–1 versus PS ≥ 2) (PDF 52 kb)
Supp. Figure B
OS in patients with good versus poor performance status at start of ICI (PS 0–1 versus PS ≥ 2) (PDF 59 kb)
Supp. Figure C
PFS in patients receiving ICI monotherapy versus combination therapy (PDF 63 kb)
Supp. Figure D
OS in patients receiving ICI monotherapy versus combination therapy (PDF 68 kb)
Supp. Figure E
PFS in patients with prior tumour irradiation (RT) versus patients without prior RT or prophylactic cranial irradiation (PCI) only (PDF 68 kb)
Supp. Figure F
OS in patients with prior tumour irradiation (RT) versus patients without prior RT or prophylactic cranial irradiation (PCI) only (PDF 73 kb)
Supp. Figure G
Correlation between TMB and response category. Horizontal lines show group median. (PDF 9 kb)
Supp. Figure H
PFS in patients with low (< 50th centile) versus high (> 50th centile) TMB (PDF 54 kb)
Supp. Figure J
OS in patients with low (< 50th centile) versus high (> 50th centile) TMB (PDF 55 kb)
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Schmid, S., Mauti, L.A., Friedlaender, A. et al. Outcomes with immune checkpoint inhibitors for relapsed small-cell lung cancer in a Swiss cohort. Cancer Immunol Immunother 69, 1605–1613 (2020). https://doi.org/10.1007/s00262-020-02565-0
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DOI: https://doi.org/10.1007/s00262-020-02565-0