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2005:
Yajima Naoki; Yamanaka Ryuya; Mine Takashi; Tsuchiya Naoto; Homma Jumpei; Sano Masakazu; Kuramoto Terukazu; Obata Yayoi; Komatsu Nobukazu; Arima Yoshimi; Yamada Akira; Shigemori Minoru; Itoh Kyogo; Tanaka Ryuichi
Immunologic evaluation of personalized peptide vaccination for patients with advanced malignant glioma.
Clinical cancer research : an official journal of the American Association for Cancer Research 2005;
11(
16):.
PURPOSE: The primary goal of this phase I study was to assess the safety and immunologic responses of personalized peptide vaccination for patients with advanced malignant glioma. EXPERIMENTAL DESIGN: Twenty-five patients with advanced malignant glioma (8 grade 3 and 17 grade 4 gliomas) were evaluated in a phase I clinical study of a personalized peptide vaccination. For personalized peptide vaccination, prevaccination peripheral blood mononuclear cells and plasma were provided to examine cellular and humoral responses to 25 or 23 peptides in HLA-A24+ or HLA-A2+ patients, respectively; then, only the reactive peptides (maximum of four) were used for in vivo administration. RESULTS: The protocols were well tolerated with local redness and swelling at the injection site in most cases. Twenty-one patients received more than six vaccinations and were evaluated for both immunologic and clinical responses. Increases in cellular or humoral responses specific to at least one of the vaccinated peptides were observed in the postvaccination (sixth) samples from 14 or 11 of 21 patients, respectively. More importantly, significant levels of peptide-specific IgG were detected in the postvaccination tumor cavity or spinal fluid of all of the tested patients who showed favorable clinical responses. Clinical responses were 5 partial responses, 8 cases of stable disease, and 8 cases of progressive disease. The median overall survival for patients with recurrent glioblastoma multiforme in this study (n = 17) was 622 days. CONCLUSIONS: Personalized peptide vaccinations were recommended for the further clinical study to malignant glioma patients.
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