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BioAssay: AID 547393

Displacement of [3H]1alpha,25-(OH)2D3 from rat recombinant full length VDR relative to 1alpha,25-(OH)2D3

Twelve new analogues of 19-nor-1alpha,25-dihydroxyvitamin D# (5-16) were prepared by convergent syntheses, employing the Wittig-Horner reaction. The necessary Grundmann type ketones (45-48), possessing fixed configurations of the hydroxyl group at C-25, were obtained by a multistep procedure from commercial vitamin D# and enantiomers of 1,3-butanediol (23 and 24). We have examined the influence more ..
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 Tested Compounds
 Tested Compounds
All(9)
 
 
Unspecified(9)
 
 
 Tested Substances
 Tested Substances
All(13)
 
 
Unspecified(13)
 
 
 Related BioAssays
 Related BioAssays
AID: 547393
Data Source: ChEMBL (695919)
Depositor Category: Literature, Extracted
BioAssay Version:
Deposit Date: 2011-09-18
Modify Date: 2014-12-06

Data Table ( Complete ):           View All Data
Target
Sequence: RecName: Full=Vitamin D3 receptor; Short=VDR; AltName: Full=1,25-dihydroxyvitamin D3 receptor; AltName: Full=Nuclear receptor subfamily 1 group I member 1
Description ..   
Protein Family: The ligand binding domain of vitamin D receptors, a member of the nuclear receptor superfamily
Comment ..   

Gene:VDR     Related Protein 3D Structures     More BioActivity Data..
Tested Compounds:
Description:
Title: Removal of the 26-methyl group from 19-nor-1alpha,25-dihydroxyvitamin D# markedly reduces in vivo calcemic activity without altering in vitro VDR binding, HL-60 cell differentiation, and transcription.

Abstract: Twelve new analogues of 19-nor-1alpha,25-dihydroxyvitamin D# (5-16) were prepared by convergent syntheses, employing the Wittig-Horner reaction. The necessary Grundmann type ketones (45-48), possessing fixed configurations of the hydroxyl group at C-25, were obtained by a multistep procedure from commercial vitamin D# and enantiomers of 1,3-butanediol (23 and 24). We have examined the influence of removal of one of the methyl groups located at C-25 on the biological in vitro and in vivo activity. The in vivo tests showed that the synthesized vitamin D compounds (5-16) exhibit reduced calcemic activity both in bone and in the intestine. However, in vitro potency of 2-methylene and 2alpha-methyl compounds (5-10, 13, and 14) remained similar or enhanced as compared to that of 1alpha,25-(OH)#D#.
(PMID: 21105677)
Categorized Comment - additional comments and annotations
From BioAssay Depositor:
Assay Type: Binding
Target Type: Target is a single protein chain
Assay Data Source: Scientific Literature
Result Definitions
TIDNameDescriptionHistogramTypeUnit
OutcomeThe BioAssay activity outcomeOutcome
1Ratio Ki activity commentRatio Ki activity commentString
2Ratio Ki standard flagRatio Ki standard flagInteger
3Ratio Ki qualifierRatio Ki qualifierString
4Ratio Ki published valueRatio Ki published valueFloat
5Ratio Ki standard valueRatio Ki standard valueFloat

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