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Biological Activities, Mechanisms of Action and Biomedical Prospect of the Antitumor Ether Phospholipid ET-18-OCH3 (Edelfosine), A Proapoptotic Agent in Tumor Cells

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The antitumor ether lipid ET-18-OCH3 (edelfosine) is the prototype of a new class of antineoplastic agents, synthetic analogues of lysophosphatidylcholine, that shows a high metabolic stability, does not interact with DNA and shows a selective apoptotic response in tumor cells, sparing normal cells. Unlike currently used antitumor drugs, ET-18- OCH3 does not act directly on the formation and function of the replication machinery, and thereby its effects are independent of the proliferative state of target cells. Because of its capacity to modulate cellular regulatory and signalingevents, including those failing in cancer cells, like defective apoptosis, ET-18-OCH3, beyond its putative clinical importance, is an interesting model compound for the development of more selective drugs for cancer therapy. Although ET-18-OCH3 enhances host defense mechanisms against tumors, its major antitumor action lies in a direct effect on cancer cells, inhibiting phosphatidylcholine biosynthesis and inducing apoptosis in tumor cells. Recent progress has allowed unraveling the molecular mechanism underlying the apoptotic action of ET-18-OCH3, leading to the notion that ET-18-OCH3 is selectively incorporated into tumor cells and induces cell death by intracellular activation of the cell death receptor Fas / CD95. This intracellular Fas / CD95 activation is a novel mechanism of action for an antitumor drug and represents a new way to target tumor cells in cancer chemotherapy that can be of interest as a new framework in designing novel antitumor drugs. ET-18-OCH3 and some analogues are pleiotropic agents that affect additional biomedical important diseases, including parasitic and autoimmune diseases, suggesting new therapeutic indications for these compounds.
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Keywords: Antitumor Ether Phospholipid; Biological Activities; Biomedical Prospect; Bovine serum albumin; Edelfosine; Merocyanine 540; NATURAL GLYCEROL; Phosphatidylcholine; Photodynamic therapy; Proapoptotic

Document Type: Review Article

Publication date: 01 October 2002

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  • Current Drug Metabolism aims to cover all the latest and outstanding developments in drug metabolism and disposition. The journal serves as an international forum for the publication of timely reviews in drug metabolism. Current Drug Metabolism is an essential journal for academic, clinical, government and pharmaceutical scientists who wish to be kept informed and up-to-date with the latest and most important developments. The journal covers the following areas:

    In vitro systems including CYP-450; enzyme induction and inhibition; drug-drug interactions and enzyme kinetics; pharmacokinetics, toxicokinetics, species scaling and extrapolations; P-glycoprotein and transport carriers; target organ toxicity and interindividual variability; drug metabolism and disposition studies; extrahepatic metabolism; phase I and phase II metabolism; recent developments for the identification of drug metabolites and adducts.
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