title: Preparation, metabolic stability and biological properties of omega-trifluorinated analog of 12-hydroxyeicosatetraenoic acid.
abstract: 12-Hydroxyeicosatetraenoic acid (HETE) is associated with a variety of inflammatory conditions. For studies on pathophysiological function of 12-HETE, metabolically more stable analogs of 12-HETE would be useful. We biologically synthesized 20,20,20-trifluoro-12-HETE (20-F3-12-HETE) by incubating enantioselectively synthesized 20,20,20-trifluoro-arachidonic acid with human platelets. The product was identified by UV absorption spectrophotometry and gas chromatography-mass spectrometry. When 1 microgram 20-F3-12-HETE was incubated with 5 X 10(6) human neutrophils for 45 min, only 5% of the analog was metabolized while 66% of 12-HETE was metabolized in the same incubation condition. With 2 X 10(7) neutrophils, 37% of the analog was metabolized at the same incubation condition while 87% of 12-HETE was metabolized. Thus, by blocking omega-oxidation of 12-HETE with fluorine atoms, the stability of 12-HETE was greatly increased. This result indicates that the omega-oxidation is a major pathway for 12-HETE metabolism. The analog demonstrated as much chemotactic activity on human neutrophils as 12-HETE, and binding affinity of the analog for 12-HETE receptor in human epidermal cell was equal to that of 12-HETE. An analog of 12-HETE, which has extended metabolic stability without alteration of neutrophil chemotactic activity and binding affinity, would be a useful tool for studies on pathophysiological role of 12-HETE in inflammatory conditions.
authors.affiliation: Department of Veterans Affairs Medical Center, Albany, NY.
authors.forename: Y
authors.initials: Y
authors.lastname: Tanaka
authors.forename: K K
authors.initials: KK
authors.lastname: Bush
authors.forename: T
authors.initials: T
authors.lastname: Taguchi
authors.forename: Y
authors.initials: Y
authors.lastname: Kobayashi
authors.forename: R G
authors.initials: RG
authors.lastname: Briggs
authors.forename: E
authors.initials: E
authors.lastname: Gross
authors.forename: T
authors.initials: T
authors.lastname: Ruzicka
mesh_terms: D019377:12-Hydroxy-5,8,10,14-eicosatetraenoic Acid; D001667:Binding, Competitive; D002851:Chromatography, High Pressure Liquid; D006801:Humans; D006893:Hydroxyeicosatetraenoic Acids / Q000737:chemistry / Q000378:metabolism*; D007700:Kinetics; D013058:Mass Spectrometry; D014407:Tumor Cells, Cultured
chemical_list: D006893:Hydroxyeicosatetraenoic Acids; D019377:12-Hydroxy-5,8,10,14-eicosatetraenoic Acid