Cited by 144Immunotherapy and Immune ResponsesCancer Immunotherapy and BiomarkersCAR-T cell therapy research

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A phase I multicenter study to assess the safety, tolerability, and immunogenicity of mRNA-4157 alone in patients with resected solid tumors and in combination with pembrolizumab in patients with unresectable solid tumors.

Abstract

2523 Background: T-cell targeting of mutation-derived epitopes (neoantigens) has been demonstrated to drive anti-tumor responses. Immunizing patients against such neoantigens in combination with a checkpoint inhibitor (CPI) may elicit greater anti-tumor responses than CPI alone. Mutations are rarely shared between patients, thus requiring a personalized approach to vaccine design. Methods: A phase I dose escalation study of mRNA-4157 as adjuvant monotherapy in patients with resected solid tumors (melanoma, bladder carcinoma, HPV negative HNSCC, NSCLC, SCLC, MSI-High, or TMB High cancers) and in combination with pembrolizumab in patients with advanced or metastatic cancer is being conducted to evaluate safety. mRNA-4157 is a lipid encapsulated personalized vaccine encoding multiple neoantigens selected using a proprietary algorithm designed to induce neoantigen specific T cells and associated anti-tumor responses. Patients may receive up to 9 cycles (Q3W) of mRNA-4157 by intramuscular injection (0.04 – 1 mg). In the combination arm, pembrolizumab (200 mg) is administered for two cycles prior to combination with mRNA-4157; patients may continue pembrolizumab after completion of 9 cycles of combination therapy. Primary end points include safety, tolerability, and recommended phase 2 dose. Results: 33 patients received mRNA-4157; 13 as monotherapy and 20 in combination with pembrolizumab. No DLTs were reported, and treatment related AEs have generally been of low grade and reversible, and no drug related SAEs or AEs ≥ grade 3 have been observed. Of the 13 patients on adjuvant monotherapy (3 melanoma, 8 NSCLC, 2 MSI-High), 12 patients remain disease free on study, median follow-up of 8 months. 20 patients have been treated in combination (1 TMB-high, 4 bladder, 2 HNSCC, 1 melanoma, 7 NSCLC, 2 SCLC, 3 MSI-high), 12 had progressed on prior CPI, 16 have been restaged and there are 1 CR (on pembrolizumab prior to vaccination), 2 PR, 5 SD for at least 5 combination cycles, 5 PD, 2 iuPD, and 1 patient is non-evaluable for response but remains on study. Neoantigen specific T cell responses have been detected by IFN-γ ELISpot from PBMCs. Conclusions: mRNA-4157 is safe and well tolerated at all dose levels tested. Clinical responses have been observed in combination with pembrolizumab and neoantigen-specific T cells have been induced, supporting the advancement of mRNA-4157 to phase 2. Clinical trial information: NCT03313778.

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Crossref · 10.1200/jco.2019.37.15_suppl.2523

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Metadata

Authors
Burris, H. A., Patel, M. R., Cho, D. C., Clarke, J. M., Gutierrez, M., Zaks, T. Z., Frederick, J., Hopson, K., Mody, K., Binanti-Berube, A., Robert-Tissot, C., Goldstein, B., Breton, B., Sun, J., Zhong, S., Pruitt, S. K., Keating, K., Meehan, R. S., & Gainor, J. F.
Affiliations
  • Sarah Cannon (US)
  • Florida Cancer Specialists, Sarasota, FL;
  • New York University (US)
  • Duke Medical Center (US)
  • Hackensack University Medical Center (US)
  • Moderna Therapeutics (United States) (US)
  • Moderna Tx, Cambridge, MA;
  • Merck & Co., Inc., Rahway, NJ, USA (United States) (US)
  • Massachusetts General Hospital (US)
Venue
Journal of Clinical Oncology
Published
2019-05-20
Volume
37
Issue
15_suppl
Pages
2523-2523
ISSN
  • 0732-183X (ISSN-L)
  • 1527-7755
OpenAlex
W2947382141
Cited by
144
References
0
Citations by year
2026: 13 · 2025: 31 · 2024: 18 · 2023: 31 · 2022: 22 · 2021: 18 · 2020: 11
Type
conference abstract
Language
en
Open access
closed
Locations
Journal of Clinical Oncology (publishedVersion)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Immunotherapy and Immune Responses
  • Health Sciences › Medicine › Oncology › Cancer Immunotherapy and Biomarkers
  • Health Sciences › Medicine › Oncology › CAR-T cell therapy research
Keywords
personalized cancer vaccines, neoantigens, pembrolizumab, immune checkpoint inhibitors, solid tumors, adjuvant therapy, safety and tolerability, immunogenicity, tumor mutational burden, microsatellite instability, non-small cell lung cancer, melanoma, bladder cancer, head and neck squamous cell carcinoma, small cell lung cancer, dose escalation

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