Isoprenoid Alcohols are Susceptible to Oxidation with Singlet Oxygen and Hydroxyl Radicals. Issue 2 (30th December 2015)

• Record Type: Journal Article
• Authors: Komaszylo née Siedlecka, Joanna; Kania, Magdalena; Masnyk, Marek; Cmoch, Piotr; Lozinska, Iwona; Czarnocki, Zbigniew; Skorupinska‐Tudek, Karolina; Danikiewicz, Witold; Swiezewska, Ewa
• Is Part Of: Lipids. Volume 51:Issue 2(2016)
• Page Start: 229
• Page End: 244
• Publication Date: 2015-12-30
• Subjects: Isoprenoid oxidation -- Singlet oxygen -- Hydrogen peroxide -- Sodium molybdate -- Porphyrin -- Hydroxyl radical -- Oxygen -- UV irradiation; Lipids -- Periodicals; Lipids -- Periodicals; Lipiden; Lipides -- Périodiques; 547.77
• DOI: 10.1007/s11745-015-4104-y
• Languages: English
• ISSNs: 0024-4201

Abstract

Abstract: Isoprenoids, as common constituents of all living cells, are exposed to oxidative agents—reactive oxygen species, for example, singlet oxygen or hydroxyl radicals. Despite this fact, products of oxidation of polyisoprenoids have never been characterized. In this study, chemical oxidation of isoprenoid alcohols (Prenol‐2 and ‐10) was performed using singlet oxygen (generated in the presence of hydrogen peroxide/molybdate or upon photochemical reaction in the presence of porphyrin), oxygen (formed upon hydrogen peroxide dismutation) or hydroxyl radical (generated by the hydrogen peroxide/sonication, UV/titanium dioxide or UV/hydrogen peroxide) systems. The structure of the obtained products, hydroxy‐, peroxy‐ and heterocyclic derivatives, was studied with the aid of mass spectrometry (MS) and nuclear magnetic resonance (NMR) methods. Furthermore, mass spectrometry with electrospray ionization appeared to be a useful analytical tool to detect the products of oxidation of isoprenoids (ESI–MS analysis), as well as to establish their structure on the basis of the fragmentation spectra of selected ions (ESI–MS/MS analysis). Taken together, susceptibility of polyisoprenoid alcohols to various oxidizing agents was shown for the first time.