Cited by 102Immunotherapy and Immune ResponsesCancer Research and TreatmentsCancer Immunotherapy and Biomarkers

Phase i trial of a recombinant yeast-CEA vaccine (GI-6207) in adults with metastatic CEA-expressing carcinoma

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Bilusic, Marijo, Heery, Christopher R., Arlen, Philip M., Rauckhorst, Myrna, Apelian, David, Tsang, Kwong Y., Tucker, Jo A., Jochems, Caroline +3 more·2014·Cancer Immunology, Immunotherapy

Abstract

Yeast-CEA (GI-6207) is a therapeutic cancer vaccine genetically modified to express recombinant carcinoembryonic antigen (CEA) protein, using heat-killed yeast (Saccharomyces cerevisiae) as a vector. In preclinical studies, yeast-CEA induced a strong immune response to CEA and antitumor responses. Patients received subcutaneous vaccines every 2 weeks for 3 months and then monthly. Patients were enrolled at 3 sequential dose levels: 4, 16, and 40 yeast units (10(7) yeast particles/unit). Eligible patients were required to have serum CEA > 5 ng/mL or > 20 % CEA(+) tumor block, ECOG PS 0-2, and no history of autoimmunity. Restaging scans were performed at 3 months and then bimonthly. Peripheral blood was collected for the analysis of immune response (e.g., by ELISPOT assay). Twenty-five patients with metastatic CEA-expressing carcinomas were enrolled. Median patient age was 52 (range 39-81). A total of 135 vaccines were administered. The vaccine was well tolerated, and the most common adverse event was grade 1/2 injection-site reaction. Five patients had stable disease beyond 3 months (range 3.5-18 months), and each had CEA stabilization while on-study. Some patients showed evidence post-vaccination of increases in antigen-specific CD8(+) T cells and CD4(+) T lymphocytes and decreases in regulatory T cells. Of note, a patient with medullary thyroid cancer had substantial T cell responses and a vigorous inflammatory reaction at sites of metastatic disease. Yeast-CEA vaccination had minimal toxicity and induced some antigen-specific T cell responses and CEA stabilization in a heterogeneous, heavily pre-treated patient population. Further studies are required to determine the clinical benefit of yeast-CEA vaccination.

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  • In CRC, numerous tumor-associated antigens have been identified and utilized to target MHC class I, including carcinoembryonic antigen (CEA), mucin-1, SART3, β-human chorionic gonadotropin (β-hCG), Survivin-2B, and p53.

    “In the case of CRC, numerous tumor-associated antigens have been identified and utilized in order to target MHC class I. Among these antigens are carcinoembryonic antigen (CEA), mucin-1, squamous cell carcinoma antigen recognized by T cells 3 (SART3), β-human chorionic gonadotropin (β-hCG), Survivin-2B, and p53 [153,154].”

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  1. [25]Richards D Muscarella P Ritch P Fisher W Flynn P Whiting S Mathisen A Ferrero J Speyer S Cohn A A randomized phase II adjuvant trial of resected patients with ras mutation bearing pancreas cancer treated with GI-4000 and gemcitabine or gemcitabine alone: A safety analysis of the first 100 treated patients ASCO Gastrointestinal Cancers Symposium abstr 2010 229

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Authors
Bilusic, M., Heery, C. R., Arlen, P. M., Rauckhorst, M., Apelian, D., Tsang, K. Y., Tucker, J. A., Jochems, C., Schlom, J., Gulley, J. L., & Madan, R. A.
Affiliations
  • National Institutes of Health (US)
  • GlobeImmune (United States) (US)
Corresponding author
Gulley, James L.
Venue
Cancer Immunology, Immunotherapy
Published
2013-12-07
Volume
63
Issue
3
Pages
225-234
ISSN
  • 0340-7004 (ISSN-L)
  • 1432-0851
OpenAlex
W2022660421
Cited by
102
References
44
Citations by year
2026: 1 · 2025: 7 · 2024: 5 · 2023: 6 · 2022: 6 · 2021: 10 · 2020: 12 · 2019: 5 · 2018: 7 · 2017: 10 · 2016: 10 · 2015: 15 · 2014: 7
FWCI
5.89
Type
journal article
Language
en
Open access
Locations
  • Cancer Immunology Immunotherapy (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Cancer Institute (Z01BC010666)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Immunotherapy and Immune Responses
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biotechnology › Cancer Research and Treatments
  • Health Sciences › Medicine › Oncology › Cancer Immunotherapy and Biomarkers
Keywords
carcinoembryonic antigen, recombinant yeast vaccine, therapeutic cancer vaccines, metastatic carcinoma, medullary thyroid carcinoma, antigen-specific T cell responses, regulatory T cells, vaccine safety, dose escalation
MeSH terms
Adenocarcinoma, Adult, Aged, Aged, 80 and over, Carcinoembryonic Antigen, Cells, Cultured, Colonic Neoplasms, Female, Follow-Up Studies, Genetic Engineering, Genetic Vectors, Humans, Injections, Subcutaneous, Male, Middle Aged, Neoplasm Metastasis, Saccharomyces cerevisiae, CD4-Positive T-Lymphocytes, Cytokines, Treatment Outcome, CD8-Positive T-Lymphocytes, Vaccines, DNA, Cancer Vaccines, T-Lymphocytes, Regulatory, Enzyme-Linked Immunospot Assay

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