Abstract
In our search for the mechanisms by which the drug 1-O-alkyl-2-O-methylglycero-3-phosphocholine (AMG-PC) inhibits tumor growth and metastasis, we have detected a metabolite, 1-O-alkyl-2-O-methylglycerol (AMG), in membranes of MO4 mouse fibrosarcoma cells grown in the presence of the drug. Synthetic AMG inhibited the activation of highly purified human protein kinase C by diacylglycerol in the presence of phosphatidylserine. Furthermore, AMG also inhibited the receptor-specific binding of 3H-phorbol-12,13-dibutyrate to human HL-60 promyeloid leukemia cells in a dose-dependent fashion. AMG-PC was not effective or much less so in these assays. We suggest that interaction of the metabolite AMG with protein kinase C may inhibit stimulus-response coupling in tumor cells and may thus potentially contribute to the mechanism by which AMG-PC exerts its anticancer activities.
MeSH Terms
Animals
Antineoplastic Agents/pharmacology
Cell Line
Fibrosarcoma
Glyceryl Ethers/pharmacology
Mice
Mice, Inbred C3H
Neoplasm Invasiveness
Phorbol Esters/metabolism
Phospholipid Ethers/pharmacology
Protein Kinase C/metabolism
Tumor Cells, Cultured/drug effects,enzymology
Chemicals
Antineoplastic Agents
Glyceryl Ethers
Phorbol Esters
Phospholipid Ethers
Protein Kinase C
Authors & Affiliations
6 authors, click to expand affiliations / ORCID
van Blitterswijk W J
Division of Cell Biology, The Netherlands Cancer Institute (Antoni van Leeuwenhoek-Huis), Amsterdam.
van der Bend R L
Kramer I M
Verhoeven A J
Hilkmann H
de Widt J
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