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  • Title: Cytotoxicity of docosahexaenoic acid and eicosapentaenoic acid in tumor cells and the dependence on binding to serum proteins and incorporation into intracellular lipids.
    Author: Kageyama K, Yamada R, Otani S, Onoyama Y, Yano I, Yamaguchi W, Yamaguchi Y, Kogawa H, Nagao N, Miwa N.
    Journal: Oncol Rep; 2000; 7(1):79-83. PubMed ID: 10601596.
    Abstract:
    Docosahexaenoic acid (DHA) inhibited the DNA synthesis in Ehrlich ascites tumor cells more markedly than eicosapentaenoic acid (EPA), which was more inhibitory than oleic-, linoleic-, linolenic-, and arachidonic acids. Their activities augmented according to the increase of number of double bonds in the molecule. To correlate the cytotoxicity with lipid syntheses in the cells, distribution of EPA and DHA incorporated into cellular lipids was assessed. EPA was incorporated into triglycerides (TG) and DHA into phosphatidylcholine (PC). These synthesis into TG and PC etc., which shattered from cytotoxicity, may be involved in tumor-cellular protecting actions against EPA or DHA. EPA and DHA involved in cytotoxicity exhibition are their free acid forms. Thus, as an anticancer reaction, intracellular accumulation in the free acid form of DHA was more marked than that of EPA.
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