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BioAssay: AID 255125

Inhibitory concentration against wild type mutant human thioredoxin reductase (Sec498Cys) (1.3 uM) pre-incubated for 10 min at 25 degree C in buffer in the presence of 100 uM NADPH; Not determined

The human selenoprotein thioredoxin reductase is involved in antioxidant defense and DNA synthesis. As increased thioredoxin reductase levels are associated with drug sensitivity to cisplatin and drug resistance in tumor cells, this enzyme represents a promising target for the development of cytostatic agents. To optimize the potential of the widely used cisplatin to inhibit the human thioredoxin more ..
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 Tested Compounds
 Tested Compounds
All(1)
 
 
Inconclusive(1)
 
 
 Tested Substances
 Tested Substances
All(1)
 
 
Inconclusive(1)
 
 
 Related BioAssays
 Related BioAssays
AID: 255125
Data Source: ChEMBL (321601)
Depositor Category: Literature, Extracted
BioAssay Version:
Deposit Date: 2010-05-24
Modify Date: 2014-08-24

Data Table ( Complete ):           View All Data
Targets
Sequence: RecName: Full=Thioredoxin reductase 1, cytoplasmic; Short=TR; AltName: Full=Gene associated with retinoic and interferon-induced mortality 12 protein; Short=GRIM-12; Short=Gene associated with retinoic and IFN-induced mortality 12 protein; AltName: Full=KM-102-derived reductase-like factor; AltName: Full=Thioredoxin reductase TR1
Description ..   
Protein Family: Pyridine nucleotide-disulphide oxidoreductase, dimerization domain
Comment ..   

Gene:TXNRD1     Related Protein 3D Structures     More BioActivity Data..


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Tested Compound:
Description:
Title: Synthesis of 5-nitro-2-furancarbohydrazides and their cis-diamminedichloroplatinum complexes as bitopic and irreversible human thioredoxin reductase inhibitors.

Abstract: The human selenoprotein thioredoxin reductase is involved in antioxidant defense and DNA synthesis. As increased thioredoxin reductase levels are associated with drug sensitivity to cisplatin and drug resistance in tumor cells, this enzyme represents a promising target for the development of cytostatic agents. To optimize the potential of the widely used cisplatin to inhibit the human thioredoxin reductase and therefore to overcome cisplatin resistance, we developed and synthesized four cis-diamminedichloroplatinum complexes of the lead 5-nitro-2-furancarbohydrazide 8 selected from high-throughput screening. Detailed kinetics revealed that the isolated fragments, 5-nitro-2-furancarbohydrazide and cisplatin itself, bind with micromolar affinities at two different subsites of the human enzyme. By tethering both fragments four nitrofuran-based cis-diamminedichloroplatinum complexes 13a-c and 20 were synthesized and identified as bi-ligand irreversible inhibitors of the human enzyme with nanomolar affinities. Studies with mutant enzymes clearly demonstrate the penultimate selenocysteine residue as the prime target of the synthesized cis-diamminedichloroplatinum complexes.
(PMID: 16250662)
Categorized Comment
Assay Type: Binding

Assay Data Source: Scientific Literature

Target Type: Target is a group of closely related proteins

Protein Target Class: enzyme reductase

Result Definitions
TIDNameDescriptionHistogramTypeUnit
OutcomeThe BioAssay activity outcomeOutcome
1IC50 activity commentIC50 activity commentString
2IC50 standard flagIC50 standard flagInteger
3IC50 qualifierIC50 qualifierString
4IC50 published valueIC50 published valueFloatnM
5IC50 standard valueIC50 standard valueFloat

Data Table (Concise)
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