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Molecules 2015, 20(7), 12364-12375; doi:10.3390/molecules200712364

Mimicking the Lipid Peroxidation Inhibitory Activity of Phospholipid Hydroperoxide Glutathione Peroxidase (GPx4) by Using Fatty Acid Conjugates of a Water-Soluble Selenolane

1
Department of Chemistry, School of Science, Tokai University, Kitakaname, Hiratsuka-shi, Kanagawa 259-1292, Japan
2
Radiation and Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
*
Author to whom correspondence should be addressed.
Academic Editor: Thomas G. Back
Received: 12 May 2015 / Revised: 16 June 2015 / Accepted: 1 July 2015 / Published: 7 July 2015
(This article belongs to the Special Issue Selenium Catalysts and Antioxidants)
View Full-Text   |   Download PDF [783 KB, uploaded 7 July 2015]   |  

Abstract

A series of fatty acid conjugates of trans-3,4-dihydroxy-1-selenolane (DHS) were synthesized by reacting DHS with appropriate acid chlorides. The obtained monoesters were evaluated for their antioxidant capacities by the lipid peroxidation assay using a lecithin/cholesterol liposome as a model system. The observed antioxidant capacities against accumulation of the lipid hydroperoxide (LOOH) increased with increasing the alkyl chain length and became saturated for dodecanoic acid (C12) or higher fatty acid monoesters, for which the capacities were much greater than those of DHS, its tridecanoic acid (C13) diester, and PhSeSePh. On the other hand, the bacteriostatic activity of myristic acid (C14) monoester, evaluated through the colony formation assay using Bacillus subtilis, indicated that it has higher affinity to bacterial cell membranes than parent DHS. Since DHS-fatty acid conjugates would inhibit lipid peroxidation through glutathione peroxidase (GPx)-like 2e mechanism, higher fatty acid monoesters of DHS can mimic the function of GPx4, which interacts with LOOH to reduce it to harmless alcohol (LOH). Importance of the balance between hydrophilicity and lipophilicity for the design of effective GPx4 mimics was suggested. View Full-Text
Keywords: antioxidant; lipid peroxidation; TBARS; colony formation assay antioxidant; lipid peroxidation; TBARS; colony formation assay
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Iwaoka, M.; Katakura, A.; Mishima, J.; Ishihara, Y.; Kunwar, A.; Priyadarsini, K.I. Mimicking the Lipid Peroxidation Inhibitory Activity of Phospholipid Hydroperoxide Glutathione Peroxidase (GPx4) by Using Fatty Acid Conjugates of a Water-Soluble Selenolane. Molecules 2015, 20, 12364-12375.

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