Abstract
Gastric and gastroesophageal junction (G/GEJ) cancers carry a poor prognosis, and despite recent advancements, most patients die of their disease. Although immune checkpoint blockade became part of the standard-of-care for patients with metastatic G/GEJ cancers, its efficacy and impact on the tumor microenvironment (TME) in early disease remain largely unknown. We hypothesized higher efficacy of neoadjuvant immunotherapy plus chemotherapy in patients with nonmetastatic G/GEJ cancer. In the phase 2 PANDA trial, patients with previously untreated resectable G/GEJ tumors (n = 21) received neoadjuvant treatment with one cycle of atezolizumab monotherapy followed by four cycles of atezolizumab plus docetaxel, oxaliplatin and capecitabine. Treatment was well tolerated. There were grade 3 immune-related adverse events in two of 20 patients (10%) but no grade 4 or 5 immune-related adverse events, and all patients underwent resection without treatment-related delays, meeting the primary endpoint of safety and feasibility. Tissue was obtained at multiple time points, allowing analysis of the effects of single-agent anti-programmed cell death ligand 1 (PD-L1) and the subsequent combination with chemotherapy on the TME. Twenty of 21 patients underwent surgery and were evaluable for secondary pathologic response and survival endpoints, and 19 were evaluable for exploratory translational analyses. A major pathologic response (≤10% residual viable tumor) was observed in 14 of 20 (70%, 95% confidence interval 46–88%) patients, including 9 (45%, 95% confidence interval 23–68%) pathologic complete responses. At a median follow-up of 47 months, 13 of 14 responders were alive and disease-free, and five of six nonresponders had died as a result of recurrence. Notably, baseline anti-programmed cell death protein 1 (PD-1)+CD8+ T cell infiltration was significantly higher in responders versus nonresponders, and comparison of TME alterations following anti-PD-L1 monotherapy versus the subsequent combination with chemotherapy showed an increased immune activation on single-agent PD-1/L1 axis blockade. On the basis of these data, monotherapy anti-PD-L1 before its combination with chemotherapy warrants further exploration and validation in a larger cohort of patients with nonmetastatic G/GEJ cancer. ClinicalTrials.gov registration: NCT03448835.
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Neoadjuvant therapy with immune checkpoint blockade, antiangiogenesis, and chemotherapy for locally advanced gastric cancer
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Resistance to immune checkpoint inhibitors in advanced gastro-oesophageal cancers
Data availability
The RNA and DNA sequencing data will be deposited in the European Genome-Phenome Archive under EGAS00001007676, and these data will be shared on reasonable request for academic use and within the limitations of the provided informed consent and under General Data Protection Regulation law. All data requests supported by the principal investigator/corresponding author of the study will be reviewed by the institutional review board of the NKI. The researcher will need to sign a data access agreement with the NKI after approval. The form to request access can be found at https://ega.nki.nl/ and will be centrally reviewed through repository@nki.nl, which will contact the corresponding author (M.C.). Estimated time to response is 2–4 weeks.
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Acknowledgements
We thank Hoffman-La Roche for funding this study. We thank all the patients and their families for participating in the present study. We thank the Core Facility of Molecular Pathology and Biobanking, in particular A. Broeks, S. Cornelissen and M. Alkemade, for their support in processing samples and performing immunohistochemistry; M. Nieuwland, R. Kluin, A. Velds and the Genomics Core Facility for their support with sequencing; I. Seignette for her support in digital imaging analysis using HALO; R. Harkes and Y. Ge for their support in quantification of CD8+ cells using QuPath; L. Al-van Wijck and M. van de Belt from the scientific administration department for data management and for support in trial conduct and management; N. Brandhorst for facilitating sample acquisition and processing; T. Korse, M. Lucas and E. Platte for PBMC acquisition and processing; Y. Hilhorst and M. Warmerdam for patient care; and St Jansdal Hospital, Rode Kruis Hospital, Tergooi Medical Center, Haga Hospital, Noordwest Hospital Group, Gelre Hospitals, Amsterdam UMC, Franciscus Hospital, PoliDirect IJburg, Slotervaart Hospital, Laurentius Hospital and St Antonius Hospital for patient referral. We would also like to acknowledge M.C. Liu and G. Laliotis from Natera for their supervision and critical review of the ctDNA analysis. The present study was funded by Hoffman-La Roche and sponsored by the NKI. The funding source had no role in design and execution of the study, data analysis or writing of the manuscript.
Author information
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These authors contributed equally: Joris van de Haar, José G. van den Berg.
Authors and Affiliations
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Department of Gastrointestinal Oncology, Netherlands Cancer Institute – Antoni van Leeuwenhoek Hospital, Amsterdam, the Netherlands
Yara L. Verschoor, Jolanda M. van Dieren, Cecile Grootscholten, Marieke A. Vollebergh, Peggy den Hartog, Monique E. van Leerdam, Emile E. Voest & Myriam Chalabi
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Department of Molecular Oncology and Immunology, Netherlands Cancer Institute – Antoni van Leeuwenhoek Hospital, Amsterdam, the Netherlands
Joris van de Haar, Ton N. Schumacher & Emile E. Voest
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Oncode Institute, Amsterdam, the Netherlands
Joris van de Haar, Ton N. Schumacher & Emile E. Voest
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Department of Pathology, Netherlands Cancer Institute – Antoni van Leeuwenhoek Hospital, Amsterdam, the Netherlands
José G. van den Berg & Liudmila L. Kodach
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Department of Surgery, Netherlands Cancer Institute – Antoni van Leeuwenhoek Hospital, Amsterdam, the Netherlands
Johanna W. van Sandick, Alexander A. F. A. Veenhof & Koen J. Hartemink
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Biometrics department, Netherlands Cancer Institute – Antoni van Leeuwenhoek Hospital, Amsterdam, the Netherlands
Sara Balduzzi
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Department of Pathology, Leiden University Medical Center, Leiden, the Netherlands
Marieke E. IJsselsteijn & Noel F. C. C. de Miranda
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Department of Medical Oncology, Netherlands Cancer Institute – Antoni van Leeuwenhoek Hospital, Amsterdam, the Netherlands
Marieke A. Vollebergh, John B. A. G. Haanen & Myriam Chalabi
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Natera, Inc, Austin, TX, USA
Adham Jurdi, Shruti Sharma & Erik Spickard
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Department of Nuclear Medicine, Netherlands Cancer Institute – Antoni van Leeuwenhoek Hospital, Amsterdam, the Netherlands
Emilia C. Owers
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Department of Radiology, Netherlands Cancer Institute – Antoni van Leeuwenhoek Hospital, Amsterdam, the Netherlands
Annemarieke Bartels-Rutten
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Department of Gastroenterology and Hepatology, Leiden University Medical Center, Leiden, the Netherlands
Monique E. van Leerdam
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Department of Medical Oncology, Leiden University Medical Center, Leiden, the Netherlands
John B. A. G. Haanen
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Oncology Service, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland
John B. A. G. Haanen
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Department of Hematology, Leiden University Medical Center, Leiden, the Netherlands
Ton N. Schumacher
Contributions
Y.L.V. analyzed and interpreted clinical and translational data and wrote the manuscript under supervision of M.C. J.v.d.H performed the genomic/transcriptomic biomarker analyses. S.B. performed statistical analyses. J.G.v.d.B. and L.L.K. performed the histo- and immunopathologic scoring. J.G.v.d.B. annotated tumor areas for IHC quantification analysis. M.E.I. and N.F.C.C.d.M. performed IMC and interpreted the data. A.J., S.S., E.S. performed ctDNA analysis and interpreted the data together with Y.L.V. and M.C. C.G., M.A.V. and P.d.H. were responsible for patient care. J.W.v.S., A.A.F.A.V. and K.J.H. informed patients and performed surgery. J.M.v.D. and M.E.v.L. performed endoscopies. J.M.v.D. revised all endoscopic reports and images. A.B.-R. revised CT scans, and E.C.O. revised FDG-PET scans. M.C., T.N.S. and J.B.A.G.H. made the experimental plan of investigation. M.C. designed the trial and coordinated trial procedures. All authors reviewed, edited and approved the manuscript and vouch for the accuracy of the data reported and adherence to the protocol.
Corresponding author
Correspondence to Myriam Chalabi.
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