Experimental chemotherapy of human medulloblastoma with classical alkylators.
Seven classical alkylators were tested for activity against the continuous human medulloblastoma cell line TE-671 grown in vitro and as s.c. and intracranial xenografts in athymic mice. Drugs tested included melphalan, cyclophosphamide (4-hydroperoxycyclophosphamide in vitro), iphosphamide (4-hydroperoxyiphosphamide in vitro), phenylketocyclo-phosphamide, phenylketoiphosphamide, Asta Z 7557, and thiotriethyl-enephosphoramide. All agents were active, with melphalan demonstrating the most activity in vitro and in vivo. Comparative studies of cyclophosphamide and phenylketocyclophosphamide revealed partition coefficients (log P) of 0.73 and greater than 1.69, respectively, and cyclophosphamide exhibited greater cytotoxic activity in post- (equitoxic) drug administration murine plasma. Hematological toxicity was limited to leukopenia/neutropenia for both of these agents. These studies suggest that the classical alkylators may have a role in the treatment of medulloblastoma and provide a means to further analyze their therapeutic potential.
H S
HS
Friedman
O M
OM
Colvin
S M
SM
Ludeman
S C
SC
Schold
V L
VL
Boyd
L H
LH
Mulhbaier
D D
DD
Bigner
D000477:Alkylating Agents / Q000378:metabolism / Q000627:therapeutic use* / Q000633:toxicity; D000818:Animals; D001773:Blood Cells / Q000187:drug effects; D001932:Brain Neoplasms / Q000188:drug therapy; D002460:Cell Line; D003520:Cyclophosphamide / Q000627:therapeutic use; D005260:Female; D006801:Humans; D008297:Male; D008527:Medulloblastoma / Q000188:drug therapy*; D008558:Melphalan / Q000627:therapeutic use; D051379:Mice; D008807:Mice, Inbred BALB C; D009368:Neoplasm Transplantation; D012878:Skin Neoplasms / Q000188:drug therapy; D014183:Transplantation, Heterologous; D014410:Tumor Stem Cell Assay
D000477:Alkylating Agents; D003520:Cyclophosphamide; D008558:Melphalan