alexa Phase I study of decitabine in combination with vorinostat in patients with advanced solid tumors and non-Hodgkin's lymphomas.
Oncology

Oncology

Chemotherapy: Open Access

Author(s): Stathis A, Hotte SJ, Chen EX, Hirte HW, Oza AM

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PURPOSE: This phase I study evaluated the safety, tolerability, pharmacokinetics, and preliminary efficacy of the combination of decitabine with vorinostat. PATIENTS AND METHODS: Patients with advanced solid tumors or non-Hodgkin's lymphomas were eligible. Sequential and concurrent schedules were studied. RESULTS: Forty-three patients were studied in 9 different dose levels (6 sequential and 3 concurrent). The maximum tolerated dose (MTD) on the sequential schedule was decitabine 10 mg/m(2)/day on days 1 to 5 and vorinostat 200 mg three times a day on days 6 to 12. The MTD on the concurrent schedule was decitabine 10 mg/m(2)/day on days 1 to 5 with vorinostat 200 mg twice a day on days 3 to 9. However, the sequential schedule of decitabine 10 mg/m(2)/day on days 1 to 5 and vorinostat 200 mg twice a day on days 6 to 12 was more deliverable than both MTDs with fewer delays on repeated dosing and it represents the recommended phase II (RP2D) dose of this combination. Dose-limiting toxicities during the first cycle consisted of myelosuppression, constitutional and gastrointestinal symptoms and occurred in 12 of 42 (29%) patients evaluable for toxicity. The most common grade 3 or higher adverse events were neutropenia (49% of patients), thrombocytopenia (16%), fatigue (16%), lymphopenia (14%), and febrile neutropenia (7%). Disease stabilization for 4 cycles or more was observed in 11 of 38 (29%) evaluable patients. CONCLUSION: The combination of decitabine with vorinostat is tolerable on both concurrent and sequential schedules in previously treated patients with advanced solid tumors or non-Hodgkin's lymphomas. The sequential schedule was easier to deliver. The combination showed activity with prolonged disease stabilization in different tumor types.

This article was published in Clin Cancer Res. and referenced in Chemotherapy: Open Access

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