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BioAssay: AID 307857

Binding affinity to rat glucocorticoid receptor

The radiosynthesis and the radiopharmacological characterization of [(11)C]AL-438 as a nonsteroidal ligand for the glucocorticoid receptor (GR) is described. Radiolabeling of the corresponding desmethyl precursor 10 with [(11)C]MeI gave [(11)C]AL-438 in decay-corrected radiochemical yields of 30+/-4% (based upon [(11)C]CO(2)) within 35 min at a specific radioactivity of 10-15 GBq/micromol at the more ..
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 Tested Compounds
 Tested Compounds
All(2)
 
 
Unspecified(2)
 
 
 Tested Substances
 Tested Substances
All(2)
 
 
Unspecified(2)
 
 
 Related BioAssays
 Related BioAssays
AID: 307857
Data Source: ChEMBL (455883)
Depositor Category: Literature, Extracted
BioAssay Version:
Deposit Date: 2010-05-25
Modify Date: 2014-05-25

Data Table ( Complete ):           View All Data
Target
Sequence: RecName: Full=Glucocorticoid receptor; Short=GR; AltName: Full=Nuclear receptor subfamily 3 group C member 1
Description ..   
Protein Family: Ligand binding domain of the glucocorticoid receptor, a member of the nuclear receptor superfamily
Comment ..   

Gene:NR3C1     Related Protein 3D Structures     More BioActivity Data..
Tested Compounds:
Description:
Title: Synthesis and radiopharmacological characterization of [11C]AL-438 as a nonsteroidal ligand for imaging brain glucocorticoid receptors.

Abstract: The radiosynthesis and the radiopharmacological characterization of [(11)C]AL-438 as a nonsteroidal ligand for the glucocorticoid receptor (GR) is described. Radiolabeling of the corresponding desmethyl precursor 10 with [(11)C]MeI gave [(11)C]AL-438 in decay-corrected radiochemical yields of 30+/-4% (based upon [(11)C]CO(2)) within 35 min at a specific radioactivity of 10-15 GBq/micromol at the end-of-synthesis. The radiopharmacological evaluation of [(11)C]AL-438 involved biodistribution and small animal PET imaging in rats, and autoradiography studies using rat brain sections. Biodistribution studies were performed in male Wistar rats and demonstrated high radioactivity uptake in pituitary and brain. However, the inability of high dose corticosterone to block binding would suggest that the radioactivity accumulation in the brain was not receptor-mediated.
(PMID: 17499506)
Categorized Comment
Assay Type: Binding

Assay Data Source: Scientific Literature

BAO: Assay Format: biochemical format

Target Type: Target is a single protein chain

Result Definitions
TIDNameDescriptionHistogramTypeUnit
OutcomeThe BioAssay activity outcomeOutcome
1Log EC50 activity commentLog EC50 activity commentString
2Log EC50 standard flagLog EC50 standard flagInteger
3Log EC50 qualifierLog EC50 qualifierString
4Log EC50 published valueLog EC50 published valueFloat
5Log EC50 standard valueLog EC50 standard valueFloat
6Log EC50 binding domainsLog EC50 binding domainsString

Data Table (Concise)
Data Table ( Complete ):     View All Data
Classification
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