Document Detail


Biosynthesis of 20,20,20-trifluoroleukotriene B4 from 20,20,20-trifluoroarachidonic acid: a metabolically stable analog of leukotriene B4 and its application to a study of stimulation of leukotriene B4 synthesis by immunoglobulin G1,2.
MedLine Citation:
PMID:  2835934     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Leukotriene B4 is rapidly metabolized through omega-oxidation, preventing its detection when it is produced under certain biological conditions. To investigate leukotriene B4 production in various physiological conditions, analogs of arachidonic acid which are converted to metabolically stable analogs of leukotriene B4 would be useful. We have synthesized 20,20,20-trifluoroarachidonic acid by the cis-selective Wittig reaction of the C12-C20 fragment with phosphonium salt. 20,20,20-trifluoroarachidonic acid was transformed into 20,20,20-trifluoroleukotriene B4 when incubated with human neutrophils in the presence of the calcium ionophore A23187. The product was identified by uv absorption spectrophotometry, gas chromatography-mass spectrometry, and coelution on high-performance liquid chromatography with 20,20,20-trifluoroleukotriene B4, which was enantioselectively synthesized by the reaction of the fluorine-containing C11-C20 fragment with the C1-C10 phosphonate. The fluorinated leukotriene B4 demonstrated as much chemotactic activity on human neutrophils as natural leukotriene B4 and was metabolically stable when incubated with human neutrophils, probably by blocking omega-oxidation. Also, enzymes catalyzing the transformation of arachidonic acid (AA) into leukotriene B4 did not discriminate the fluorinated precursors from the natural, nonfluorinated AA, thus 20-F3-AA is a valid analog of AA to be used in the study of AA metabolism. When 50 microM of the fluorinated acid was incubated with neutrophils stimulated with heat-aggregated human immunoglobulin G, a significant amount of fluorinated leukotriene B4 (4.3 ng/10(6) cells/40 min, at most) was formed in a dose-dependent manner while little leukotriene B4 was detected with incubation with 50 microM arachidonic acid, probably due to omega-oxidation of the product, leukotriene B4. 20,20,20-Trifluoroarachidonic acid appears to be a useful tool for studying the capacity of leukotriene B4 synthesis in various biological systems while long-lasting 20,20,20-trifluoroleukotriene B4 would serve as an excellent analog of leukotriene B4 in pharmacological studies to understand functions of leukotrienes B4.
Authors:
Y Tanaka; T M Klauck; W Jubiz; T Taguchi; Y Hanzawa; A Igarashi; K Inazawa; Y Kobayashi; R G Briggs
Related Documents :
6253824 - Vitamin e modulates the lipoxygenation of arachidonic acid in leukocytes.
1899344 - Double hydroperoxidation of alpha-linolenic acid by potato tuber lipoxygenase.
2983324 - Inhibitors of the cytochrome p-450 enzymes block the secretagogue-induced release of co...
3109494 - Metabolism of 8,11,14,17-eicosatetraenoic acid by human platelet lipoxygenase and cyclo...
24887944 -  the structure, occurrence and biological activity of ellagitannins: a general review.
21706384 - Isomerization of vaccenic acid to cis and trans c18:1 isomers during biohydrogenation b...
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Archives of biochemistry and biophysics     Volume:  263     ISSN:  0003-9861     ISO Abbreviation:  Arch. Biochem. Biophys.     Publication Date:  1988 May 
Date Detail:
Created Date:  1988-06-17     Completed Date:  1988-06-17     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0372430     Medline TA:  Arch Biochem Biophys     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  178-90     Citation Subset:  IM    
Affiliation:
Veterans Administration Medical Center, Albany, New York.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Arachidonic Acids / biosynthesis*
Calcimycin / pharmacology
Cells, Cultured
Chemotaxis, Leukocyte
Chromatography, High Pressure Liquid
Gas Chromatography-Mass Spectrometry
Humans
Immunoglobulin G*
Isomerism
Leukotriene B4 / biosynthesis*,  metabolism*
Neutrophils / drug effects
Chemical
Reg. No./Substance:
0/Arachidonic Acids; 0/Immunoglobulin G; 115178-89-7/20,20,20-trifluoroarachidonic acid; 115178-97-7/20-trifluoromethylleukotriene B4; 52665-69-7/Calcimycin; 71160-24-2/Leukotriene B4

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Transposition of target information from the magnetic resonance and computed tomography scan images ...
Next Document:  Preparation of human monoclonal antibodies reactive with human melanoma and the possibility of clini...