Multicenter, phase II clinical trial of cancer vaccination for advanced esophageal cancer with three peptides derived fr
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RESEARCH
Open Access
Multicenter, phase II clinical trial of cancer vaccination for advanced esophageal cancer with three peptides derived from novel cancer-testis antigens Koji Kono1,10*, Hisae Iinuma2, Yasunori Akutsu3, Hiroaki Tanaka4, Naoko Hayashi5, Yasuto Uchikado6, Tsuyoshi Noguchi7, Hideki Fujii1, Kota Okinaka2, Ryoji Fukushima2, Hisahiro Matsubara3, Masaichi Ohira4, Hideo Baba5, Shoji Natsugoe6, Seigou Kitano7, Kazuyoshi Takeda8, Koji Yoshida9, Takuya Tsunoda9 and Yusuke Nakamura9
Abstract Background: Since a phase I clinical trial using three HLA-A24-binding peptides from TTK protein kinase (TTK), lymphocyte antigen-6 complex locus K (LY6K), and insulin-like growth factor-II mRNA binding protein-3 (IMP3) had been shown to be promising for esophageal squamous cell carcinoma (ESCC), we further performed a multicenter, non-randomized phase II clinical trial. Patients and methods: Sixty ESCC patients were enrolled to evaluate OS, PFS, immunological response employing ELISPOT and pentamer assays. Each of the three peptides was administered with IFA weekly. All patients received the vaccination without knowing an HLA-A type, and the HLA types were key-opened at the analysis point. Hence, the endpoints were set to evaluate differences between HLA-A*2402-positive (24(+)) and -negative (24(−)) groups. Results: The OS in the 24 (+) group (n = 35) tended to be better than that in the 24(−) group (n = 25) (MST 4.6 vs. 2.6 month, respectively, p = 0.121), although the difference was not statistically significant. However, the PFS in the 24(+) group was significantly better than that in the 24(−) group (p = 0.032). In the 24(+) group, ELISPOT assay indicated that the LY6K-, TTK-, and IMP3-specific CTL responses were observed after the vaccination in 63%, 45%, and 60% of the 24(+) group, respectively. The patients having LY6K-, TTK-, and IMP3-specific CTL responses revealed the better OS than those not having CTL induction, respectively. The patients showing the CTL induction for multiple peptides have better clinical responses. Conclusions: The immune response induced by the vaccination could make the prognosis better for advanced ESCC patients. Trial registration: ClinicalTrials.gov, number NCT00995358 Keywords: Cancer vaccine, Esophageal cancer, Phase II clinical trial, CTL, Peptide vaccine
* Correspondence: [email protected] 1 First Department of Surgery, University of Yamanashi, Yamanashi, Japan 10 Department of Surgery, National University of Singapore, Level 8, NUHS Tower Block, NUHS 1E Kent Ridge Road, 119228, Singapore, Singapore Full list of author information is available at the end of the article © 2012 Kono et al.; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Kono et al. Journal of Translational Medicine 2012, 10:141 http://www.translational-medici
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