Safety and pharmacokinetics of dose-intensive imatinib mesylate plus temozolomide: phase 1 trial in adults with malignant glioma

July 24th, 2008 by admin

We observed the peak tolerated pane (MTD) and dose-limiting morbidness (DLT) of imatinib mesylate, an inhibitor of the organ tyrosine kinases platelet-derived ontogeny bourgeois organ (PDGFR), the proto-oncogene creation c-kit, and the seeing accelerator Bcr-Abl, when administered for 8 life in compounding with temozolomide (TMZ) to cancerous glioma (MG) patients. MG patients who had not unsuccessful preceding TMZ were suitable to obtain TMZ at a pane of 150–200 mg/m2 per period on life 4–8 nonnegative imatinib mesylate administered orally on life 1–8 of apiece 4-week cycle. Patients were foliate supported on concurrent brass of CYP3A4-inducing medication drugs (EIAEDs). The imatinib pane was escalated in successive cohorts of patients independently for apiece stratum. Imatinib, at doses ranging from 400 mg to 1,200 mg, was administered with TMZ to 65 patients: 52 (80%) with glioblastoma multiforme (GBM) and 13 (20%) with appraise threesome MG. At enrollment, 34 patients (52%) had steady disease, and 33 (48%) had proportional disease; 30 patients (46%) were on EIAEDs. The MTD of imatinib for patients concurrently receiving or not receiving EIAEDs was 1,000 mg. DLTs were hematologic, gastrointestinal, renal, and hepatic. Pharmacokinetic analyses revealed down exposures and enhanced clearance among patients on EIAEDs. Among GBM patients with steady disease at entering (n = 28), the norm progression-free and coverall activity nowadays were 41.7 and 56.1 weeks, respectively. Imatinib doses up to 1,000 mg/day for 8 serial life are substantially tolerated when compounded with accepted TMZ dosing for MG patients. A ensuant form 2 think is required to boost appraise the effectualness of this program for this enduring population. (Source: Neuro-Oncology)

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