title: Antineoplastic activity of alkylphosphocholines (APC) in human breast carcinomas in vivo and in vitro; use of liposomes.
abstract: This study examines the in vitro and in vivo activity of alkylphosphocholines (APC) in experimental human breast carcinomas. Three analogs, hexadecylphosphocholine (HPC), octadecylphosphocholine (OPC) and eicosanylphosphocholine (EPC) were investigated. Three hormone receptor negative cell lines were sensitive to all three APCs in vitro whereas the receptor positive MCF-7 line was more resistant. Sensitivity was seen in 4/6 hormone receptor negative tumors in vivo, with HPC being the most active analog. There were no antitumor effects in the four receptor positive models. The reasons for these differences in response between hormone receptor negative and -positive lines are not yet understood and require further study. Gastrointestinal toxicity and hemolysis, the major side effects of the APCs, were reduced by the use of liposomal preparations.
authors.affiliation: Max-Delbrück-Center for Molecular Medicine, Berlin-Buch, Germany.
authors.forename: I
authors.initials: I
authors.lastname: Fichtner
authors.forename: R
authors.initials: R
authors.lastname: Zeisig
authors.forename: H
authors.initials: H
authors.lastname: Naundorf
authors.forename: S
authors.initials: S
authors.lastname: Jungmann
authors.forename: D
authors.initials: D
authors.lastname: Arndt
authors.forename: G
authors.initials: G
authors.lastname: Asongwe
authors.forename: J A
authors.initials: JA
authors.lastname: Double
authors.forename: M C
authors.initials: MC
authors.lastname: Bibby
mesh_terms: D000284:Administration, Oral; D000328:Adult; D000368:Aged; D000818:Animals; D000970:Antineoplastic Agents / Q000008:administration & dosage*; D001943:Breast Neoplasms / Q000188:drug therapy* / Q000473:pathology; D004305:Dose-Response Relationship, Drug; D004337:Drug Carriers; D004354:Drug Screening Assays, Antitumor; D005260:Female; D006801:Humans; D007274:Injections, Intraperitoneal; D008081:Liposomes; D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains; D008819:Mice, Nude; D008875:Middle Aged; D010767:Phosphorylcholine / Q000008:administration & dosage* / Q000031:analogs & derivatives*; D014407:Tumor Cells, Cultured
chemical_list: D000970:Antineoplastic Agents; D004337:Drug Carriers; D008081:Liposomes; D010767:Phosphorylcholine; C039128:miltefosine