Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UMLS:C0023473 (chronic myeloid leukemia)
 18,916 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

An early phase II study of CPT-11 (irinotecan hydrochloride) was conducted in patients with hematological malignancies by 4 administration regimens in a cooperative study involving 13 institutes in Japan. The overall response rate was 23% (7/30) for non-Hodgkin's lymphoma, 33% (1/3) for Hodgkin's disease, 18% (2/11) for acute lymphoblastic leukemia and 7% (1/15) for acute myelogenous leukemia. One PR was also obtained in a patient with chronic myelogenous leukemia. Among responders, 6 relapsed and refractory malignant lymphomas (ML) and 2 relapsed and refractory acute leukemias (AL) were involved. The response rates in ML with the regimens B (40 mg/m2 for 5 days every 3-4 weeks) and C (40 mg/m2 for 3 days every weeks) were 31% (5/16) and 33% (3/9), respectively. The other regimens (regimen A, 200 mg/m2 once a day every 3-4 weeks and regimen D) resulted in no response. Responses in AL were only observed in regimen D (20 mg/m2 twice a day for 7 days every 3-4 weeks). Major toxicities were leukopenia (91%), nausea/vomiting (74%), diarrhea (73%) and anorexia (64%). The incidence of severe gastrointestinal symptoms was higher in regimen B than regimen C. Further studies are warranted to confirm the effectiveness and safety of CPT-11 against ML and AL. The recommended administration schedule was regimen C for ML and regimen D for AL.
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PMID:[An early phase II study of CPT-11 (irinotecan hydrochloride) in patients with hematological malignancies]. 829 18

Busulfan is an alkylating agent commonly used in the treatment of chronic myelogenous leukemia and in combination with cyclophosphamide in preparation for allogeneic bone marrow transplantation. Serial treatment of a childhood high-grade glioma xenograft (D-456 MG) with busulfan resulted in a busulfan-resistant xenograft, D-456 MG(BR). Cross-resistance to 1,3-bis(2-chloroethyl)-1-nitrosourea was seen but not resistance to cyclophosphamide or CPT-11. Cytoplasmic levels of glutathione in D-456 MG(BR) were approximately one-half those found in D-456 MG. This depletion could not be explained by levels of glutathione-S-transferase, or by amplification, rearrangement, or increased levels of transcript of gamma-glutamylcysteine synthetase. Furthermore, depletion of glutathione in D-456 MG did not alter busulfan activity. Quantitation of busulfan levels in D-456 MG and D-456 MG(BR) xenografts following treatment of mice at the dose lethal to 10% of the animals demonstrated that significantly lower levels of drug were achieved in D-456 MG(BR). These studies suggest that alterations in drug transport or metabolism of busulfan may play a role in the resistance of D-456 MG(BR) to this alkylator.
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PMID:Characterization of the mechanisms of busulfan resistance in a human glioblastoma multiforme xenograft. 927 17