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Induction of MAGE-A3 and HPV-16 immunity by Trojan vaccines in patients with head and neck carcinoma.


ABSTRACT: BACKGROUND:We performed a pilot study using Trojan vaccines in patients with advanced squamous cell carcinoma of the head and neck (SCCHN). These vaccines are composed of HLA-I and HLA-II restricted melanoma antigen E (MAGE)-A3 or human papillomavirus (HPV)-16 derived peptides, joined by furin-cleavable linkers, and linked to a "penetrin" peptide sequence derived from HIV-TAT. Thirty-one patients with SCCHN were screened for the trial and 5 were enrolled. METHODS:Enrolled patients were treated with 300 ?g of Trojan peptide supplemented with Montanide and granulocyte-macrophage colony-stimulating factor (GM-CSF) at 4-week intervals for up to 4 injections. RESULTS:Following vaccination, peripheral blood mononuclear cells (PBMCs) from 4 of 5 patients recognized both the full Trojan constructs and constituent HLA-II peptides, whereas responses to HLA-I restricted peptides were less pronounced. CONCLUSION:This treatment regimen seems to have acceptable toxicity and elicits measurable systemic immune responses against HLA-II restricted epitopes in a subset of patients with advanced SCCHN.

SUBMITTER: Voskens CJ 

PROVIDER: S-EPMC3725741 | biostudies-literature | 2012 Dec

REPOSITORIES: biostudies-literature

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<h4>Background</h4>We performed a pilot study using Trojan vaccines in patients with advanced squamous cell carcinoma of the head and neck (SCCHN). These vaccines are composed of HLA-I and HLA-II restricted melanoma antigen E (MAGE)-A3 or human papillomavirus (HPV)-16 derived peptides, joined by furin-cleavable linkers, and linked to a "penetrin" peptide sequence derived from HIV-TAT. Thirty-one patients with SCCHN were screened for the trial and 5 were enrolled.<h4>Methods</h4>Enrolled patients  ...[more]

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