Published in:
01-06-2015 | Original Article
Wilms tumor 1 peptide vaccination combined with temozolomide against newly diagnosed glioblastoma: safety and impact on immunological response
Authors:
Naoya Hashimoto, Akihiro Tsuboi, Naoki Kagawa, Yasuyoshi Chiba, Shuichi Izumoto, Manabu Kinoshita, Noriyuki Kijima, Yoshihiro Oka, Soyoko Morimoto, Hiroko Nakajima, Satoshi Morita, Junichi Sakamoto, Sumiyuki Nishida, Naoki Hosen, Yusuke Oji, Norio Arita, Toshiki Yoshimine, Haruo Sugiyama
Published in:
Cancer Immunology, Immunotherapy
|
Issue 6/2015
Login to get access
Abstract
To investigate the safety of combined Wilms tumor 1 peptide vaccination and temozolomide treatment of glioblastoma, a phase I clinical trial was designed. Seven patients with histological diagnosis of glioblastoma underwent concurrent radiotherapy and temozolomide therapy. Patients first received Wilms tumor 1 peptide vaccination 1 week after the end of combined concurrent radio/temozolomide therapy, and administration was continued once per week for 7 weeks. Temozolomide maintenance was started and performed for up to 24 cycles, and the observation period for safety encompassed 6 weeks from the first administration of maintenance temozolomide. All patients showed good tolerability during the observation period. Skin disorders, such as grade 1/2 injection-site reactions, were observed in all seven patients. Although grade 3 lymphocytopenia potentially due to concurrent radio/temozolomide therapy was observed in five patients (71.4 %), no other grade 3/4 hematological or neurological toxicities were observed. No autoimmune reactions were observed. All patients are still alive, and six are on Wilms tumor 1 peptide vaccination without progression, yielding a progression-free survival from histological diagnosis of 5.2–49.1 months. Wilms tumor 1 peptide vaccination was stopped in one patient after 12 injections by the patient’s request. The safety profile of the combined Wilms tumor 1 peptide vaccination and temozolomide therapy approach for treating glioblastoma was confirmed.