Synthesis of (5Z,8Z,11Z,14Z)-18- and 19-azidoeicosa-5,8,11,14-tetraenoic acids and their [5,6,8,9,11,12,14,15-3H8]-analogues through a common synthetic route
摘要:
Total synthesis of (5Z,8Z, 11Z, 14Z)-18- and 19-azidoeicosa-5,8,11,14-tetraenoic acids and their [5,6,8,9,11,12,14,15-H-3(8)]-analogues via the corresponding p-toluenesulphonates is reported. This synthetic approach allows the preparation of radioactively labelled arachidonic acid derivatives following a common synthetic route. Activity assays indicated that 15-lipoxygenases may tolerate the azido group in the substrate binding pocket and thus, radioactively labelled azido compounds may be used as photo-affinity probes to investigate mechanistic features of eicosanoid biosynthesis. (C) 2004 Elsevier Ireland Ltd. All rights reserved.
Total synthesis of (5Z,8Z,11Z,14Z)-18- and 19-oxoeicosa-5,8,11,14-tetraenoic acids
摘要:
8-oxo-ETE was synthesized via the corresponding tetraacetylenic precursor, which was prepared by cross-coupling of three key synthons: methyl 5-hexynoate, the bisfunctional C-7-C-13 fragment-7-bromo-2,5-heptadiyne-l-ol and rac-3-(benzoyloxy)hept-6-yn. The carbonyl function was introduced at the last synthesis step. 19-oxo-ETE was synthesized by coupling of acid anhydride, prepared from monomethyl ester of(5Z,8Z,l IZ,14Z)-nonadeca-5,8,11,14-tetraen-1,19-dioic acid, either with lithium dimethylcuprate or methylcuprate in a one-step procedure. (C) 2002 Elsevier Science Ltd. All rights reserved.
Repurposing Resveratrol and Fluconazole To Modulate Human Cytochrome P450-Mediated Arachidonic Acid Metabolism
作者:Ahmed A. El-Sherbeni、Ayman O. S. El-Kadi
DOI:10.1021/acs.molpharmaceut.5b00873
日期:2016.4.4
CytochromeP450 (P450) enzymes metabolize arachidonicacid (AA) to several biologically active epoxyeicosatrienoic acids (EETs) and hydroxyeicosatetraenoic acids (HETEs). Repurposing clinically-approved drugs could provide safe and readily available means to control EETs and HETEs levels in humans. Our aim was to determine how to significantly and selectively modulate P450-AA metabolism in humans by
LC–MS/MS analysis of epoxyalcohols and epoxides of arachidonic acid and their oxygenation by recombinant CYP4F8 and CYP4F22
作者:T. Nilsson、I.V. Ivanov、E.H. Oliw
DOI:10.1016/j.abb.2009.11.013
日期:2010.2
CYP4F22 and CYP4F8 are expressed in epidermis, and mutations of CYP4F22 are associated with lamellar ichthyosis. Epoxyalcohols (HEETs) and epoxides (EETs) of 20:4n-6 appear to be important for the water permeability barrier of skin. Our aim was to study the MS/MS spectra and fragmentation of these compounds and to determine whether they were oxidized by CYP4F22 or CYP4F8 expressed in yeast. HEETs were prepared from 1 5-hydroperoxyeicosatetraenoic acid (15-HPETE), 12-HPETE, and their- [H-2(8)]labeled isotopomers, and separated by normal phase-HPLC with MS/MS analysis. CYP4F22 oxygenated 20:4n-6 at C-I 8, whereas metabolites of HEETs could not be identified. CYP4F8 formed omega 3 hydroxy metabolites of HEETs derived from 12R-HPETE with 11,12-epoxy-10-hydroxy configuration, but not HEETs derived from 15S-HPETE. 8,9-EET and 11,12-EET were also subject to omega 3 hydroxylation by CYP4F8. We conclude that CYP4F8 and CYP4F22 oxidize 20:4n-6 and that CYP4F8 selectively oxidizes 8,9-EET, 11,12-EET, and 10, 11R, 12R-HEET at the omega 3 position. (C) 2010 Published by Elsevier Inc.
General biochemical synthesis of oxygenated prostaglandins E
作者:Charles J. Sih、Gabor Ambrus、Paul Foss、C. J. Lai
DOI:10.1021/ja01041a065
日期:1969.6
Pseudomonas aeruginosa cytochrome P450 CYP168A1 is a fatty acid hydroxylase that metabolizes arachidonic acid to the vasodilator 19-HETE
作者:Brian C. Tooker、Sylvie E. Kandel、Hannah M. Work、Jed N. Lampe