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  • Title: Clinical and immunologic results of a randomized phase II trial of vaccination using four melanoma peptides either administered in granulocyte-macrophage colony-stimulating factor in adjuvant or pulsed on dendritic cells.
    Author: Slingluff CL, Petroni GR, Yamshchikov GV, Barnd DL, Eastham S, Galavotti H, Patterson JW, Deacon DH, Hibbitts S, Teates D, Neese PY, Grosh WW, Chianese-Bullock KA, Woodson EM, Wiernasz CJ, Merrill P, Gibson J, Ross M, Engelhard VH.
    Journal: J Clin Oncol; 2003 Nov 01; 21(21):4016-26. PubMed ID: 14581425.
    Abstract:
    PURPOSE: To determine clinical and immunologic responses to a multipeptide melanoma vaccine regimen, a randomized phase II trial was performed. PATIENTS AND METHODS: Twenty-six patients with advanced melanoma were randomly assigned to vaccination with a mixture of four gp100 and tyrosinase peptides restricted by HLA-A1, HLA-A2, and HLA-A3, plus a tetanus helper peptide, either in an emulsion with granulocyte-macrophage colony-stimulating factor (GM-CSF) and Montanide ISA-51 adjuvant (Seppic Inc, Fairfield, NJ), or pulsed on monocyte-derived dendritic cells (DCs). Systemic low-dose interleukin-2 (Chiron, Emeryville, CA) was given to both groups. T-lymphocyte responses were assessed, by interferon gamma ELIspot assay (Chiron, Emeryville, CA), in peripheral-blood lymphocytes (PBLs) and in a lymph node draining a vaccine site (sentinel immunized node [SIN]). RESULTS: In patients vaccinated with GM-CSF in adjuvant, T-cell responses to melanoma peptides were observed in 42% of PBLs and 80% of SINs, but in patients vaccinated with DCs, they were observed in only 11% and 13%, respectively. The overall immune response was greater in the GM-CSF arm (P <.02). Vitiligo developed in two of 13 patients in the GM-CSF arm but in no patients in the DC arm. Helper T-cell responses to the tetanus peptide were detected in PBLs after vaccination and correlated with T-cell reactivity to the melanoma peptides. Objective clinical responses were observed in two patients in the GM-CSF arm and one patient in the DC arm. Stable disease was observed in two patients in the GM-CSF arm and one patient in the DC arm. CONCLUSION: The high frequency of cytotoxic T-lymphocyte responses and the occurrence of clinical tumor regressions support continued investigation of multipeptide vaccines administered with GM-CSF in adjuvant.
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