Honma Ichiya, Kitamura Hiroshi, Torigoe Toshihiko, Takahashi Akari, Tanaka Toshiaki, Sato Eiji, Hirohashi Yoshihiko, Masumori Naoya, Tsukamoto Taiji, Sato Noriyuki
Department of Urology, Sapporo Medical University School of Medicine, Sapporo, Japan.
Cancer Immunol Immunother. 2009 Nov;58(11):1801-7. doi: 10.1007/s00262-009-0691-x. Epub 2009 Mar 18.
Survivin, a member of the inhibitor of apoptosis protein family, is expressed in many malignant tumors including urothelial cancer but is hardly detectable in normal, differentiated adult tissues. Previously we reported CD8-positive cytotoxic T-lymphocytes (CTLs) were successfully induced by stimulation with survivin-2B80-88 peptide in vitro. We started a phase I clinical study of survivin-2B80-88 peptide vaccination for advanced urothelial cancer patients to assess the safety and efficacy of this vaccination. Nine patients were received vaccination and were evaluated for immunological evaluation, adverse events, and clinical responses. A total of 46 vaccinations were carried out. There was no severe adverse event. HLA-A24/survivin-2B80-88 peptide tetramer analysis revealed a significant increase in the peptide-specific CTL frequency after the vaccination in five patients. Slight reduction of the tumor volume was observed in one patient. Survivin-2B80-88 peptide-based vaccination is safe and should be further considered for potential immune and clinical efficacy in urothelial cancer patients.
生存素是凋亡抑制蛋白家族的成员之一,在包括尿路上皮癌在内的许多恶性肿瘤中表达,但在正常的、分化成熟的成人组织中几乎检测不到。此前我们报道,在体外使用生存素-2B80-88肽刺激可成功诱导CD8阳性细胞毒性T淋巴细胞(CTL)。我们启动了一项针对晚期尿路上皮癌患者的生存素-2B80-88肽疫苗接种的I期临床研究,以评估该疫苗接种的安全性和有效性。9名患者接受了疫苗接种,并进行了免疫学评估、不良事件和临床反应评估。共进行了46次疫苗接种。未出现严重不良事件。HLA-A24/生存素-2B80-88肽四聚体分析显示,5名患者接种疫苗后,肽特异性CTL频率显著增加。1名患者的肿瘤体积略有减小。基于生存素-2B80-88肽的疫苗接种是安全的,应进一步考虑其在尿路上皮癌患者中的潜在免疫和临床疗效。