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05.07.2018 | Original Article Open Access

Multicenter phase 1/2 study of forodesine in patients with relapsed peripheral T cell lymphoma

Annals of Hematology
Dai Maruyama, Kunihiro Tsukasaki, Toshiki Uchida, Yoshinobu Maeda, Hirohiko Shibayama, Hirokazu Nagai, Mitsutoshi Kurosawa, Yoko Suehiro, Kiyohiko Hatake, Kiyoshi Ando, Isao Yoshida, Michihiro Hidaka, Tohru Murayama, Yoko Okitsu, Norifumi Tsukamoto, Masafumi Taniwaki, Junji Suzumiya, Kazuo Tamura, Takahiro Yamauchi, Ryuzo Ueda, Kensei Tobinai
Wichtige Hinweise
A correction to this article is available online at https://​doi.​org/​10.​1007/​s00277-018-3455-x.


Peripheral T cell lymphomas are an aggressive group of non-Hodgkin lymphomas with poor outcomes for most subtypes and no accepted standard of care for relapsed patients. This study evaluated the efficacy and safety of forodesine, a novel purine nucleoside phosphorylase inhibitor, in patients with relapsed peripheral T cell lymphomas. Patients with histologically confirmed disease, progression after ≥ 1 prior treatment, and an objective response to last treatment received oral forodesine 300 mg twice-daily. The primary endpoint was objective response rate (ORR). Secondary endpoints included duration of response, progression-free survival (PFS), overall survival (OS), and safety. Forty-eight patients (median age, 69.5 years; median of 2 prior treatments) received forodesine. In phase 1 (n = 3 evaluable), no dose-limiting toxicity was observed during the first 28 days of forodesine treatment. In phase 2 (n = 41 evaluable), the ORR for the primary and final analyses was 22% (90% CI 12–35%) and 25% (90% CI 14–38%), respectively, including four complete responses (10%). Median PFS and OS were 1.9 and 15.6 months, respectively. The most common grade 3/4 adverse events were lymphopenia (96%), leukopenia (42%), and neutropenia (35%). Dose reduction and discontinuation due to adverse events were uncommon. Secondary B cell lymphoma developed in five patients, of whom four were positive for Epstein-Barr virus. In conclusion, forodesine has single-agent activity within the range of approved therapies in relapsed peripheral T cell lymphomas, with a manageable safety profile, and may represent a viable treatment option for this difficult-to-treat population.

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