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1996-01-30
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Document 0200
DOCN M9610200
TI Aspirin triggers previously undescribed bioactive eicosanoids by human
endothelial cell-leukocyte interactions.
DT 9601
AU Claria J; Serhan CN; Department of Medicine, Brigham and Women's
Hospital, Boston, MA,; USA.
SO Proc Natl Acad Sci U S A. 1995 Oct 10;92(21):9475-9. Unique Identifier :
AIDSLINE MED/96003801
AB Aspirin [acetylsalicylic acid (ASA)], along with its
analgesic-antipyretic uses, is now also being considered for
cardiovascular protection and treatments in cancer and human
immunodeficiency virus infection. Although many of ASA's pharmacological
actions are related to its ability to inhibit prostaglandin and
thromboxane biosynthesis, some of its beneficial therapeutic effects are
not completely understood. Here, ASA triggered transcellular
biosynthesis of a previously unrecognized class of eicosanoids during
coincubations of human umbilical vein endothelial cells (HUVEC) and
neutrophils [polymorphonuclear leukocytes (PMN)]. These eicosanoids were
generated with ASA but not by indomethacin, salicylate, or
dexamethasone. Formation was enhanced by cytokines (interleukin 1 beta)
that induced the appearance of prostaglandin G/H synthase 2 (PGHS-2) but
not 15-lipoxygenase, which initiates their biosynthesis from arachidonic
acid in HUVEC. Costimulation of HUVEC/PMN by either thrombin plus the
chemotactic peptide fMet-Leu-Phe or phorbol 12-myristate 13-acetate or
ionophore A23187 leads to the production of these eicosanoids from
endogenous sources. Four of these eicosanoids were also produced when
PMN were exposed to 15R-HETE
[(15R)-15-hydroxy-5,8,11-cis-13-trans-eicosatetraenoic acid] and an
agonist. Physical methods showed that the class consists of four
tetraene-containing products from arachidonic acid that proved to be
15R-epimers of lipoxins. Two of these compounds (III and IV) were potent
inhibitors of leukotriene B4-mediated PMN adhesion to HUVEC, with
compound IV
[(5S,6R,15R)-5,6,15-trihydroxy-7,9,13-trans-11-cis-eicosatetraeno- i c
acid; 15-epilipoxin A4] active in the nanomolar range. These results
demonstrate that ASA evokes a unique class of eicosanoids formed by
acetylated PGHS-2 and 5-lipoxygenase interactions, which may contribute
to the therapeutic impact of this drug. Moreover, they provide an
example of a drug's ability to pirate endogenous biosynthetic mechanisms
to trigger new mediators.
DE Arachidonate 15-Lipoxygenase/ANALYSIS Aspirin/*PHARMACOLOGY
Calcimycin/PHARMACOLOGY Carboxypeptidases/PHARMACOLOGY Cell
Communication/*DRUG EFFECTS Cells, Cultured Chromatography, High
Pressure Liquid Drug Interactions Eicosanoids/*BIOSYNTHESIS
Endothelium, Vascular/*DRUG EFFECTS Enzyme-Linked Immunosorbent Assay
Human Interleukin-1/PHARMACOLOGY Mass Fragmentography
Neutrophils/*DRUG EFFECTS Prostaglandin-Endoperoxide Synthase/ANALYSIS
Support, Non-U.S. Gov't Support, U.S. Gov't, Non-P.H.S. Support, U.S.
Gov't, P.H.S. Tetradecanoylphorbol Acetate/PHARMACOLOGY
Thrombin/PHARMACOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).