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BioAssay: AID 336480

Activity of COX2

A rapid semi-homogeneous cyclooxygenase-2 (COX-2) enzymatic assay using scintillation proximity assay (SPA) technology was developed, and 49 ubiquitous plant secondary metabolites were screened for inhibition of COX-2-catalyzed prostaglandin E(2) (PGE(2)) biosynthesis. Assay conditions were optimized with respect to reaction time, amount of antibody, radiolabeled PGE(2), and SPA beads, and the more ..
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 Tested Compounds
 Tested Compounds
All(1)
 
 
Active(1)
 
 
 Tested Substances
 Tested Substances
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Active(1)
 
 
 Related BioAssays
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AID: 336480
Data Source: ChEMBL (484509)
BioAssay Type: Confirmatory, Concentration-Response Relationship Observed
Depositor Category: Literature, Extracted
BioAssay Version:
Deposit Date: 2010-05-26
Modify Date: 2014-05-14

Data Table ( Complete ):           Active    All
BioActive Compound: 1
Description:
Title: Screening of ubiquitous plant constituents for COX-2 inhibition with a scintillation proximity based assay.

Abstract: A rapid semi-homogeneous cyclooxygenase-2 (COX-2) enzymatic assay using scintillation proximity assay (SPA) technology was developed, and 49 ubiquitous plant secondary metabolites were screened for inhibition of COX-2-catalyzed prostaglandin E(2) (PGE(2)) biosynthesis. Assay conditions were optimized with respect to reaction time, amount of antibody, radiolabeled PGE(2), and SPA beads, and the kinetic parameter, K(m), was estimated. The assay was validated with two natural triterpenoids, ursolic and oleanolic acid, known to inhibit COX-2, as well as with four synthetic COX inhibitors, NS-398, rofecoxib, indomethacin, and aspirin. Plant metabolites of different biosynthetic origin representing several substance classes, including alkaloids, anthraquinones, flavonoids, phenylpropanes, steroids, and terpenes, were screened for inhibition of COX-2-catalyzed PGE(2) production. Of these 49 plant metabolites, eugenol, pyrogallol, and cinnamaldehyde (with IC(50) values of 129, 144, and 245 microM, respectively) were found to inhibit COX-2. This study showed that a COX-2-catalyzed PGE(2) assay using SPA is suitable for screening natural compounds with respect to COX-2 inhibition.
(PMID: 12444669)
Comment
Compounds with activity <= 50uM or explicitly reported as active by ChEMBL are flagged as active in this PubChem assay presentation.

Putative Target:

ChEMBL Target ID: 126
Target Type: SINGLE PROTEIN
Pref Name: Cyclooxygenase-2
Synonyms: COX-2;Cyclooxygenase-2;PGH synthase 2;PGHS-2;PHS II;Prostaglandin G/H synthase 2;Prostaglandin H2 synthase 2;Prostaglandin-endoperoxide synthase 2;
Gene Name: COX2;PTGS2;
Protein Accession: P35354;
Protein GI: 3915797;
Organism: Homo sapiens
Tax ID: 9606
Target Classification: enzyme reductase
Confidence: Homologous single protein target assigned
Relationship Type: Homologous protein target assigned
Categorized Comment
Assay Type: Binding

Assay Data Source: Scientific Literature

BAO: Assay Format: biochemical format

Result Definitions
TIDNameDescriptionHistogramTypeUnit
OutcomeThe BioAssay activity outcomeOutcome
1Km*Km PubChem standard valueFloatμM
2Km activity commentKm activity commentString
3Km standard flagKm standard flagInteger
4Km qualifierKm qualifierString
5Km published valueKm published valueFloatμM
6Km standard valueKm standard valueFloatnM

* Activity Concentration.

Data Table (Concise)
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