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Cancer Immunology, Immunotherapy
Published in: Cancer Immunology, Immunotherapy 12/2008

01-12-2008 | Original Article

Assessment of immunologic response and recurrence patterns among patients with clinical recurrence after vaccination with a preventive HER2/neu peptide vaccine: from US Military Cancer Institute Clinical Trials Group Study I-01 and I-02

Authors: Asna Amin, Linda C. Benavides, Jarrod P. Holmes, Jeremy D. Gates, Mark G. Carmichael, Matthew T. Hueman, Elizabeth A. Mittendorf, Catherine E. Storrer, Yusuf H. Jama, Dianna Craig, Alex Stojadinovic, Sathibalan Ponniah, George E. Peoples

Published in: Cancer Immunology, Immunotherapy | Issue 12/2008

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Abstract

Background

E75, a HER2/neu immunogenic peptide, is expressed in breast cancer (BCa). We have performed clinical trials of E75 + GM-CSF vaccine in disease-free, node-positive and node-negative BCa patients at high recurrence risk and recurrences were noted in both control and vaccine groups.

Methods

Among the 186 BCa patients enrolled, 177 completed the study. Patients were HLA typed; the HLA-A2+/A3+ patients were vaccinated; HLA-A2−/A3− patients were followed as controls. Standard clinicopathological factors, immunologic response to the vaccine, and recurrences were collected and assessed.

Results

The control group recurrence rate was 14.8 and 8.3% in the vaccinated group (P = 0.17). Comparing the 8 vaccinated recurrences (V-R) to the 88 vaccinated nonrecurrent patients (V-NR), the V-R group had higher nodal stage (≥N2: 75 vs. 5%, P = 0.0001) and higher grade tumors (%grade 3: 88 vs. 31%, P = 0.003). The V-R group did not fail to respond immunologically as noted by equivalent dimer responses and post-DTH responses. Compared to control recurrent patients (C-R), V-R patients trended toward higher-grade tumors and hormone-receptor negativity. C-R patients had 50% bone-only recurrences, compared to V-R patients with no bone-only recurrences (P = 0.05). Lastly, V-R mortality rate was 12.5% compared with 41.7% for the C-R group (P = 0.3).

Conclusions

The vaccinated patients who recurred had more aggressive disease compared to V-NR patients. V-R patients had no difference in immune response to the vaccine either in vitro or in vivo. V-R patients, when compared to C-R patients, trended towards more aggressive disease, decreased recurrence rates, decreased mortality, and no bone-only recurrences.
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Metadata
Title
Assessment of immunologic response and recurrence patterns among patients with clinical recurrence after vaccination with a preventive HER2/neu peptide vaccine: from US Military Cancer Institute Clinical Trials Group Study I-01 and I-02
Authors
Asna Amin
Linda C. Benavides
Jarrod P. Holmes
Jeremy D. Gates
Mark G. Carmichael
Matthew T. Hueman
Elizabeth A. Mittendorf
Catherine E. Storrer
Yusuf H. Jama
Dianna Craig
Alex Stojadinovic
Sathibalan Ponniah
George E. Peoples
Publication date
01-12-2008
Publisher
Springer-Verlag
Published in
Cancer Immunology, Immunotherapy / Issue 12/2008
Print ISSN: 0340-7004
Electronic ISSN: 1432-0851
DOI
https://doi.org/10.1007/s00262-008-0509-2

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