Cited by 66Ovarian cancer diagnosis and treatmentImmunotherapy and Immune ResponsesCancer Immunotherapy and Biomarkers

p53-Reactive T Cells Are Associated with Clinical Benefit in Patients with Platinum-Resistant Epithelial Ovarian Cancer After Treatment with a p53 Vaccine and Gemcitabine Chemotherapy

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Hardwick, Nicola R., Frankel, Paul, Ruel, Christopher, Kilpatrick, Julie, Tsai, Weimin, Kos, Ferdynand, Kaltcheva, Teodora, Leong, Lucille +8 more·2018·Clinical Cancer Research

Published version of a preprint

Abstract

Purpose: To conduct a phase I trial of a Modified Vaccinia Ankara vaccine delivering wild-type human p53 (p53MVA) in combination with gemcitabine chemotherapy in patients with platinum-resistant ovarian cancer. Experimental Design: Patients received gemcitabine on days 1 and 8 and p53MVA vaccine on day 15, during the first 3 cycles of chemotherapy. Toxicity was classified using the NCI Common Toxicity Criteria and clinical response assessed by CT scan. Peripheral blood samples were collected for immunophenotyping and monitoring of anti-p53 immune responses. Results: Eleven patients were evaluated for p53MVA/gemcitabine toxicity, clinical outcome, and immunologic response. Toxicity: there were no DLTs, but 3 of 11 patients came off study early due to gemcitabine-attributed adverse events (AE). Minimal AEs were attributed to p53MVA vaccination. Immunologic and clinical response: enhanced in vitro recognition of p53 peptides was detectable after immunization in both the CD4+ and CD8+ T-cell compartments in 5 of 11 and 6 of 11 patients, respectively. Changes in peripheral T regulatory cells (Tregs) and myeloid-derived suppressor cells (MDSC) did not correlate significantly with vaccine response or progression-free survival (PFS). Patients with the greatest expansion of p53-reactive T cells had significantly longer PFS than patients with lower p53-reactivity after therapy. Tumor shrinkage or disease stabilization occurred in 4 patients. Conclusions: p53MVA was well tolerated, but gemcitabine without steroid pretreatment was intolerable in some patients. However, elevated p53-reactive CD4+ and CD8+ T-cell responses after therapy correlated with longer PFS. Therefore, if responses to p53MVA can be enhanced with alternative agents, superior clinical responses may be achievable. Clin Cancer Res; 24(6); 1315–25. ©2018 AACR.

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  • Hardwick's group conducted two early-phase clinical trials of MVAp53; MVAp53 induced CD8+ and CD4+ T cell responses in patients with refractory gastrointestinal cancer and ovarian cancer.

    “Later in 2014 and 2018, Hardwick’s group conducted two early-phase clinical trials involving a modified vaccinia virus ankara vaccine encoding wtp53 (MVAp53 (253)). The studies showed that MVAp53 could induce CD8+ and CD4+ T cell responses in patients with refractory gastrointestinal cancer and ovarian cancer, respectively.”

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Research works printed but not linked: 1

  1. [1]Fleming G Seidman J Lengyel E Epithelial ovarian cancer: Principles and practice of gynecologic oncology 6th Barakat RR Markman M Randall M 2013 Philadelphia Wolters Kluwer Health/Lippincott Williams & Wilkins

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Authors
Hardwick, N. R., Frankel, P., Ruel, C., Kilpatrick, J., Tsai, W., Kos, F., Kaltcheva, T., Leong, L., Morgan, R., Chung, V., Tinsley, R., Eng, M., Wilczynski, S., Ellenhorn, J. D. I., Diamond, D. J., & Cristea, M.
Affiliations
  • Beckman Research Institute (US)
  • City Of Hope National Medical Center (US)
  • Cedars-Sinai Medical Center (US)
Corresponding author
Diamond, Don J.
Venue
Clinical Cancer Research
Published
2018-03-14
Volume
24
Issue
6
Pages
1315-1325
ISSN
  • 1078-0432 (ISSN-L)
  • 1557-3265
OpenAlex
W2781635391
Cited by
66
References
55
Citations by year
2026: 3 · 2025: 9 · 2024: 7 · 2023: 10 · 2022: 7 · 2021: 11 · 2020: 10 · 2019: 3 · 2018: 5
FWCI
7.75
Type
journal article
Language
en
Open access
Locations
  • Clinical Cancer Research (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
City of Hope Chairs Discretionary Fund and utilized City of Hope Cancer Center (P30CA033572)
Topics
  • Health Sciences › Medicine › Reproductive Medicine › Ovarian cancer diagnosis and treatment
  • Life Sciences › Immunology and Microbiology › Immunology › Immunotherapy and Immune Responses
  • Health Sciences › Medicine › Oncology › Cancer Immunotherapy and Biomarkers
Keywords
epithelial ovarian cancer, platinum resistance, gemcitabine, tumor-infiltrating T cells, CD4+ T cells, CD8+ T cells, regulatory T cells, myeloid-derived suppressor cells, progression-free survival, cancer immunotherapy
MeSH terms
Carcinoma, Ovarian Epithelial, Gemcitabine, Adult, Aged, Combined Modality Therapy, Deoxycytidine, Female, Humans, Middle Aged, Neoplasm Metastasis, Neoplasm Staging, Platinum, T-Lymphocytes, Tumor Suppressor Protein p53, Treatment Outcome, Drug Resistance, Neoplasm, Cancer Vaccines

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