[Efficacy and pharmacokinetics of imatinib mesylate in a child with chronic myeloid leukemia].
A 6-year-old girl with chronic myeloid leukemia (CML) was treated with imatinib 230 mg/m2/day and its pharmacokinetics were investigated. The patient had a complete hematologic response on day 21, but had a minor cytogenetic response and the CML progressed to a blast crisis on day 133. At present, she has maintained complete cytogenetic remission with allogenetic peripheral blood stem cell transplantation. The pharmacokinetics revealed that the maximum concentration (1.4 micrograms/ml); time to maximum concentration (5.1 h); half-life (11.0 h); trough concentration (0.4 microgram/ml); and, area under the concentration-time curve (28.1 micrograms.h/ml) were inferior to those for adult patients in the 400 mg/day group. This observation suggests that a suboptimal plasma concentration might be related to resistance to imatinib and/or blast crisis.
Department of Pediatrics, School of Medicine, Iwate Medical University.
Waka
W
Sugawara
Mikiya
M
Endo
Yukie
Y
Nakatuji
Takahide
T
Hosokawa
Shoichi
S
Chida
D000970:Antineoplastic Agents / Q000008:administration & dosage* / Q000493:pharmacokinetics; D001549:Benzamides; D001752:Blast Crisis; D002648:Child; D005260:Female; D016044:Fusion Proteins, bcr-abl / Q000032:analysis; D018380:Hematopoietic Stem Cell Transplantation; D006801:Humans; D000068877:Imatinib Mesylate; D015464:Leukemia, Myelogenous, Chronic, BCR-ABL Positive / Q000188:drug therapy* / Q000473:pathology / Q000628:therapy; D010879:Piperazines / Q000008:administration & dosage* / Q000493:pharmacokinetics; D011743:Pyrimidines / Q000008:administration & dosage* / Q000493:pharmacokinetics; D012074:Remission Induction
D000970:Antineoplastic Agents; D001549:Benzamides; D010879:Piperazines; D011743:Pyrimidines; D000068877:Imatinib Mesylate; D016044:Fusion Proteins, bcr-abl