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- W2160516412 abstract "To determine the safety, maximum tolerated dose, and pharmacokinetic-pharmacodynamic profile of a histone deacetylase inhibitor, LAQ824, in patients with advanced malignancy.LAQ824 was administered i.v. as a 3-h infusion on days 1, 2, and 3 every 21 days. Western blot assays of peripheral blood mononuclear cell lysates and tumor biopsies pretherapy and posttherapy evaluated target inhibition and effects on heat shock protein-90 (HSP90) client proteins and HSP72.Thirty-nine patients (22 male; median age, 53 years; median Eastern Cooperative Oncology Group performance status 1) were treated at seven dose levels (mg/m(2)): 6 (3 patients), 12 (4 patients), 24 (4 patients), 36 (4 patients), 48 (4 patients), 72 (19 patients), and 100 (1 patient). Dose-escalation used a modified continual reassessment method. Dose-limiting toxicities were transaminitis, fatigue, atrial fibrillation, raised serum creatinine, and hyperbilirubinemia. A patient with pancreatic cancer treated at 100 mg/m(2) died on course one at day 18 with grade 3 hyperbilirubinemia and neutropenia, fever, and acute renal failure. The area under the plasma concentration curve increased proportionally with increasing dose; median terminal half-life ranged from 8 to 14 hours. Peripheral blood mononuclear cell lysates showed consistent accumulation of acetylated histones posttherapy from 24 mg/m(2); higher doses resulted in increased and longer duration of pharmacodynamic effect. Changes in HSP90 client protein and HSP72 levels consistent with HSP90 inhibition were observed at higher doses. No objective response was documented; 3 patients had stable disease lasting up to 14 months. Based on these data, future efficacy trials should evaluate doses ranging from 24 to 72 mg/m(2).LAQ824 was well tolerated at doses that induced accumulation of histone acetylation, with higher doses inducing changes consistent with HSP90 inhibition." @default.
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- W2160516412 date "2008-10-15" @default.
- W2160516412 modified "2023-10-18" @default.
- W2160516412 title "Phase I Pharmacokinetic and Pharmacodynamic Study of LAQ824, a Hydroxamate Histone Deacetylase Inhibitor with a Heat Shock Protein-90 Inhibitory Profile, in Patients with Advanced Solid Tumors" @default.
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- W2160516412 doi "https://doi.org/10.1158/1078-0432.ccr-08-0376" @default.
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