Sustained complete hematologic remission after administration of the tyrosine kinase inhibitor imatinib mesylate in a patient with refractory, secondary AML.
Imatinib mesylate, a tyrosine kinase inhibitor targeting bcr-abl, platelet-derived growth factor receptor (PDGF-R), and c-Kit, effectively induces hematologic and cytogenetic remissions in bcr-abl(+) chronic myeloid leukemia (CML) and acute lymphoblastic leukemia (ALL) with only mild to moderate side effects. Here, we describe the successful treatment of a 64-year-old man with c-Kit(+) secondary acute myeloid leukemia (AML) refractory to standard chemotherapy. Upon 2 weeks of imatinib mesylate administration, the patient achieved a complete hematologic remission in peripheral blood. In addition, complete clearance of leukemic blasts in bone marrow and a significant cytogenetic response lasting for more than 5 months was observed. Sequence analysis of exons 2, 8, 10, 11, and 17 of the c-Kit receptor did not reveal structural alterations as previously described in a subset of AML cases. This is the first report of complete remission achieved upon administration of imatinib mesylate in a patient with highly refractory, secondary AML.
Kindler
Thomas
T
Johannes Gutenberg University, Department of Hematology/Oncology, Mainz, Germany. t.kindler@3-med.klinik.uni-mainz.de
Breitenbuecher
Frank
F
Marx
Andreas
A
Hess
Georg
G
Gschaidmeier
Harald
H
Gamm
Heinold
H
Kirkpatrick
Charles J
CJ
Huber
Christoph
C
Fischer
Thomas
T
D000753:Anemia, Refractory / Q000188:drug therapy*; D000754:Anemia, Refractory, with Excess of Blasts / Q000188:drug therapy*; D000970:Antineoplastic Agents / Q000627:therapeutic use*; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D001549:Benzamides; D001853:Bone Marrow / Q000473:pathology; D003561:Cytarabine / Q000008:administration & dosage; D003630:Daunorubicin / Q000008:administration & dosage; D018450:Disease Progression; D019008:Drug Resistance, Neoplasm; D004791:Enzyme Inhibitors / Q000627:therapeutic use*; D005091:Exons / Q000235:genetics; D006801:Humans; D000068877:Imatinib Mesylate; D015470:Leukemia, Myeloid, Acute / Q000188:drug therapy* / Q000201:enzymology / Q000235:genetics / Q000473:pathology; D008297:Male; D008875:Middle Aged; D009363:Neoplasm Proteins / Q000037:antagonists & inhibitors* / Q000235:genetics; D014411:Neoplastic Stem Cells / Q000473:pathology; D010879:Piperazines / Q000627:therapeutic use*; D019009:Proto-Oncogene Proteins c-kit / Q000187:drug effects* / Q000235:genetics; D011743:Pyrimidines / Q000627:therapeutic use*; D017479:Receptors, Platelet-Derived Growth Factor / Q000037:antagonists & inhibitors / Q000235:genetics; D012008:Recurrence; D012074:Remission Induction; D016879:Salvage Therapy
D000970:Antineoplastic Agents; D001549:Benzamides; D004791:Enzyme Inhibitors; D009363:Neoplasm Proteins; D010879:Piperazines; D011743:Pyrimidines; D003561:Cytarabine; D000068877:Imatinib Mesylate; D019009:Proto-Oncogene Proteins c-kit; D017479:Receptors, Platelet-Derived Growth Factor; D003630:Daunorubicin