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  • Title: Antineoplastic activity in vitro of free and liposomal alkylphosphocholines.
    Author: Zeisig R, Jungmann S, Arndt D, Schütt A, Nissen E.
    Journal: Anticancer Drugs; 1993 Feb; 4(1):57-64. PubMed ID: 8457716.
    Abstract:
    We investigated the liposome forming properties of three homologues of alkylphosphocholines: hexadecylphosphocholine (HPC), octadecylphosphocholine (OPC) and eicosanylphosphocholine (EPC). In the presence of cholesterol and dicetylphosphate, alkylphosphocholines form liposomes with slow permeability for entrapped carboxyfluorescein. We studied the direct cytotoxicity of alkylphosphocholine vesicles and their ability to attack MethA sarcoma cells, human skin and muscle fibroblasts (M22, GUS, Moscow), and human mouth epidermoid carcinoma cells (KB, ATCC, CCL 17). All alkylphosphocholines show cytotoxic activity against the investigated cells, the degree of which depends on the number of carbon atoms in the alkyl chain, concentration and incubation time. Whereas the etherlipid liposomes are less toxic to MethA cells than the free compounds, the liposomal alkylphosphocholines are more toxic toward KB and M22 cells than the corresponding free lipids.
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