arachidonic acid

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ar·a·chi·don·ic acid

An unsaturated fatty acid, C20H32O2, present in animal fats and synthesized by the body from linoleic acid, that is essential in human nutrition and is a precursor in the biosynthesis of some prostaglandins.

[From arachidic, of the groundnut, from New Latin Arachis, groundnut genus, from Greek arakis, arakid-, diminutive of arakos, a leguminous plant.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

arachidonic acid

(Biochemistry) a fatty acid occurring in animal cells: the metabolic precursor of several groups of biologically active substances, including prostaglandins
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
[USPRwire, Wed Aug 21 2019] A newly compiled business intelligent report, titled "Global (United States, European Union and China) Arachidonic Acid (ARA) Market Research Report 2019-2025" has been publicized to the vast archive of Market Research Hub (MRH) online repository.
(4) A modified thromboelastograph assay termed PlateletMapping was developed that uses 4 separate tests, 2 different sample types (heparinized and citrated blood), and 3 agonists (ADP, arachidonic acid, and thrombin generated by contact activation), resulting in an estimate of the percentage of inhibition of the platelet response to ADP or arachidonic acid.
Arachidonic acid (AA) (C20:4 n-6) concentration was the highest in grass carp (2.72%) followed by bighead carp (1.34%), whereas it was the lowest and comparable in Siberian sturgeon and wels catfish (0.48 and 0.4%, resp.).
Among children with asthma or rhinitis at the age of eight, higher blood levels of arachidonic acid were associated with a higher probability of being symptom-free at age 16 years.
The final concentrations of 10 [micro]mol [1.sup.-1] RN1747 and arachidonic acid are approximate because the DMSO-dissolved stock solution dissolved poorly in FSW.
We tested whether licofelone, an inhibitor of both cyclooxygenase and lipoxygenase pathways of arachidonic acid metabolism, changes the survival rate and induces apoptosis in a hepatoma cell line (H4IIE).
The main acid of this type in the western diet is linoleic acid, which is present mainly in vegetable oils, and arachidonic acid, which is derived from meat.
The 5-lipoxygenase (5-LO) enzyme catalyzes the first two steps of the conversion of arachidonic acid into leukotrienes (LTs) [1].
has been identified as a source of PUFAs mainly arachidonic acid (AA) at an average value of 30-70% and other PUFAs such as linoleic acid (LA), gamma-linolenic acid (GLA), and dihomo-gamma-linolenic acid (DHGLA) at significant levels [3].
In brief, to estimate COX-2 activity, HGFs were treated with LPS and herb for 8 h, washed, and incubated in culture medium containing exogenous arachidonic acid (10 [micro]M).