PMID: 15242018Jul 10, 2004Paper

Effect of branched-chain fatty acids on fatty acid biosynthesis of human breast cancer cells

Journal of Nutritional Science and Vitaminology
Sawitree WongtangtintharnTakayoshi Toda

Abstract

This paper describes the antitumoral activity of branched-chain fatty acid (BCFA) in human breast cancer cells with an emphasis on its effect on fatty acid biosynthesis. First, the relationship between chain-length and antitumoral activity was studied. The highest activity was observed with iso-16:0, and the activity decreased with increase or decrease of the chain-lengths from C16:0. Anteiso-BCFA, as well as iso-series, was cytotoxic to the breast cancer cells. Cytotoxicity of BCFA was comparable to that of conjugated linoleic acid known as antitumoral fatty acid. Incubation of breast cancer cells with BCFA (13-methyltetradecanoic acid) significantly reduced the [14C] acetate incorporation into free fatty acid and fatty acid esters, showing the inhibition of fatty acid biosynthesis by BCFA. Examination of substrate level effect found that BCFA slightly inhibited fatty acid synthetase and acetyl-CoA carboxylase, and significantly the glucose-6-phosphate dehydrogenase which was the main NADPH generating system in breast cancer cells. The present study thus suggests that BCFA synthetically lowers the fatty acid biosynthesis by reducing the precursors, in addition to its direct inhibitory effect on fatty acid synthetase.

Citations

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