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A Feasibility Study of Cyclophosphamide, Trastuzumab, and an Allogeneic GM-CSF-secreting Breast Tumor Vaccine for HER-2+ Metastatic Breast Cancer

Identifieur interne : 004646 ( Main/Merge ); précédent : 004645; suivant : 004647

A Feasibility Study of Cyclophosphamide, Trastuzumab, and an Allogeneic GM-CSF-secreting Breast Tumor Vaccine for HER-2+ Metastatic Breast Cancer

Auteurs : G. Chen ; R. Gupta ; S. Petrik ; M. Laiko ; Jm Leatherman ; Jm Asquith ; Mm Daphtary ; E. Garrett-Mayer ; Ne Davidson ; K. Hirt ; M. Berg ; Jn Uram ; T. Dauses ; J. Fetting ; Em Duus ; S. Atay-Rosenthal ; X. Ye ; Ac Wolff ; V. Stearns ; Em Jaffee ; La Emens

Source :

RBID : PMC:4211036

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English descriptors

Abstract

Granulocyte-macrophage colony-stimulating factor (GM-CSF)-secreting tumor vaccines are bioactive, but limited by disease burden and immune tolerance. Cyclophosphamide (CY) augments vaccine activity in tolerant neu mice and metastatic breast cancer (MBC) patients. HER-2-specific monoclonal antibodies (MAb) enhance vaccine activity in neu mice. We hypothesized that CY-modulated vaccination with HER-2-specific MAb safely induces relevant HER-2-specific immunity in neu mice and HER-2+ MBC patients. Adding both CY and the HER-2-specific MAb 7.16.4 to vaccination maximized HER-2-specific CD8+ T-cell immunity and tumor-free survival in neu transgenic mice. We therefore conducted a single arm feasibility study of CY, an allogeneic HER-2+ GM-CSF-secreting breast tumor vaccine, and weekly trastuzumab in 20 HER-2+ MBC patients. Primary clinical trial objectives were safety and clinical benefit (CB), in which CB represents complete response+partial response+stable disease. Secondary study objectives were to assess HER-2-specific T-cell responses by delayed type hypersensitivity (DTH) and intracellular cytokine staining. Subjects received three monthly vaccinations, with a boost 6-8 months from trial entry. This combination immunotherapy was safe, with CB rates at 6 months and 1 year of 55% (95% CI:32-77%, p=0.013) and 40% (95% CI:19-64%) respectively. Median progression-free survival (PFS) and overall survival (OS) were 7 (95% CI:4-16) and 42 months (95% CI:22-70) respectively. Increased HER-2-specific DTH developed in 7/20 subjects (of whom 4 had CB (95% CI:18-90)), with a trend toward longer PFS and OS in DTH responders. Polyfunctional HER-2-specific CD8+ T cells progressively expanded across vaccination cycles. Further investigation of CY-modulated vaccination with trastuzumab is warranted. (Clinicaltrials.gov identifier: NCT00399529)


Url:
DOI: 10.1158/2326-6066.CIR-14-0058
PubMed: 25116755
PubMed Central: 4211036

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<term>Antibodies, Monoclonal, Humanized (adverse effects)</term>
<term>Antineoplastic Agents (adverse effects)</term>
<term>Antineoplastic Agents (therapeutic use)</term>
<term>Breast Neoplasms (immunology)</term>
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<term>Breast Neoplasms (therapy)</term>
<term>CD8-Positive T-Lymphocytes (immunology)</term>
<term>Cancer Vaccines (adverse effects)</term>
<term>Cancer Vaccines (immunology)</term>
<term>Cancer Vaccines (therapeutic use)</term>
<term>Cell Line, Tumor</term>
<term>Combined Modality Therapy</term>
<term>Cyclophosphamide (administration & dosage)</term>
<term>Cyclophosphamide (adverse effects)</term>
<term>Feasibility Studies</term>
<term>Female</term>
<term>Granulocyte-Macrophage Colony-Stimulating Factor (metabolism)</term>
<term>Humans</term>
<term>Hypersensitivity, Delayed (immunology)</term>
<term>Mice, Transgenic</term>
<term>Middle Aged</term>
<term>Neoplasm Metastasis</term>
<term>Receptor, ErbB-2 (immunology)</term>
<term>Receptor, ErbB-2 (metabolism)</term>
<term>Survival Analysis</term>
<term>Trastuzumab</term>
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<term>Adulte d'âge moyen</term>
<term>Analyse de survie</term>
<term>Animaux</term>
<term>Anticorps monoclonaux humanisés (administration et posologie)</term>
<term>Anticorps monoclonaux humanisés (effets indésirables)</term>
<term>Antinéoplasiques (effets indésirables)</term>
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<term>Cyclophosphamide (effets indésirables)</term>
<term>Facteur de stimulation des colonies de granulocytes et de macrophages (métabolisme)</term>
<term>Femelle</term>
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<term>Hypersensibilité retardée (immunologie)</term>
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<term>Antibodies, Monoclonal, Humanized</term>
<term>Cyclophosphamide</term>
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<term>Antibodies, Monoclonal, Humanized</term>
<term>Antineoplastic Agents</term>
<term>Cancer Vaccines</term>
<term>Cyclophosphamide</term>
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<term>Cancer Vaccines</term>
<term>Receptor, ErbB-2</term>
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<term>Cancer Vaccines</term>
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<term>Cyclophosphamide</term>
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<term>Anticorps monoclonaux humanisés</term>
<term>Antinéoplasiques</term>
<term>Cyclophosphamide</term>
<term>Vaccins anticancéreux</term>
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<term>Hypersensibilité retardée</term>
<term>Lymphocytes T CD8+</term>
<term>Récepteur ErbB-2</term>
<term>Tumeurs du sein</term>
<term>Vaccins anticancéreux</term>
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<term>Breast Neoplasms</term>
<term>CD8-Positive T-Lymphocytes</term>
<term>Hypersensitivity, Delayed</term>
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<term>Breast Neoplasms</term>
</keywords>
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<term>Facteur de stimulation des colonies de granulocytes et de macrophages</term>
<term>Récepteur ErbB-2</term>
<term>Tumeurs du sein</term>
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<term>Breast Neoplasms</term>
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<term>Association thérapeutique</term>
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<front>
<div type="abstract" xml:lang="en">
<p id="P1">Granulocyte-macrophage colony-stimulating factor (GM-CSF)-secreting tumor vaccines are bioactive, but limited by disease burden and immune tolerance. Cyclophosphamide (CY) augments vaccine activity in tolerant
<italic>neu</italic>
mice and metastatic breast cancer (MBC) patients. HER-2-specific monoclonal antibodies (MAb) enhance vaccine activity in
<italic>neu</italic>
mice. We hypothesized that CY-modulated vaccination with HER-2-specific MAb safely induces relevant HER-2-specific immunity in
<italic>neu</italic>
mice and HER-2
<sup>+</sup>
MBC patients. Adding both CY and the HER-2-specific MAb 7.16.4 to vaccination maximized HER-2-specific CD8
<sup>+</sup>
T-cell immunity and tumor-free survival in
<italic>neu</italic>
transgenic mice. We therefore conducted a single arm feasibility study of CY, an allogeneic HER-2
<sup>+</sup>
GM-CSF-secreting breast tumor vaccine, and weekly trastuzumab in 20 HER-2
<sup>+</sup>
MBC patients. Primary clinical trial objectives were safety and clinical benefit (CB), in which CB represents complete response+partial response+stable disease. Secondary study objectives were to assess HER-2-specific T-cell responses by delayed type hypersensitivity (DTH) and intracellular cytokine staining. Subjects received three monthly vaccinations, with a boost 6-8 months from trial entry. This combination immunotherapy was safe, with CB rates at 6 months and 1 year of 55% (95% CI:32-77%, p=0.013) and 40% (95% CI:19-64%) respectively. Median progression-free survival (PFS) and overall survival (OS) were 7 (95% CI:4-16) and 42 months (95% CI:22-70) respectively. Increased HER-2-specific DTH developed in 7/20 subjects (of whom 4 had CB (95% CI:18-90)), with a trend toward longer PFS and OS in DTH responders. Polyfunctional HER-2-specific CD8
<sup>+</sup>
T cells progressively expanded across vaccination cycles. Further investigation of CY-modulated vaccination with trastuzumab is warranted. (
<ext-link ext-link-type="uri" xlink:href="http://Clinicaltrials.gov">Clinicaltrials.gov</ext-link>
identifier: NCT00399529)</p>
</div>
</front>
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