Bookmark and Share
BioAssay: AID 475504

Binding affinity to amyloid beta (1 to 42) fibrils by change in fluorescence at 100 uM after 10 mins

Aggregated amyloid-beta (Abeta) peptide is implicated in the pathology of Alzheimer's disease. In vitro and in vivo, these aggregates are found in a variety of morphologies, including globular oligomers and linear fibrils, which possess distinct biological activities. However, known chemical probes, including the dyes thioflavin T and Congo Red, appear to lack selectivity for specific amyloid more ..
_
   
 Tested Compounds
 Tested Compounds
All(84)
 
 
Active(19)
 
 
Inactive(65)
 
 
 Tested Substances
 Tested Substances
All(87)
 
 
Active(19)
 
 
Inactive(68)
 
 
 Related BioAssays
 Related BioAssays
AID: 475504
Data Source: ChEMBL (626367)
Depositor Category: Literature, Extracted
BioAssay Version:
Deposit Date: 2010-09-27
Modify Date: 2013-11-16

Data Table ( Complete ):           Active    All
BioActive Compounds: 19
Description:
Title: A chemical screening approach reveals that indole fluorescence is quenched by pre-fibrillar but not fibrillar amyloid-beta.

Abstract: Aggregated amyloid-beta (Abeta) peptide is implicated in the pathology of Alzheimer's disease. In vitro and in vivo, these aggregates are found in a variety of morphologies, including globular oligomers and linear fibrils, which possess distinct biological activities. However, known chemical probes, including the dyes thioflavin T and Congo Red, appear to lack selectivity for specific amyloid structures. To identify molecules that might differentiate between these architectures, we employed a fluorescence-based interaction assay to screen a collection of 68 known Abeta ligands against pre-formed oligomers and fibrils. In these studies, we found that the fluorescence of five indole-based compounds was selectively quenched ( approximately 15%) in the presence of oligomers, but remained unchanged after addition of fibrils. These results suggest that indoles might be complementary to existing chemical probes for studying amyloid formation in vitro.
(PMID: 19640715)
Comment
Putative Target:

ChEMBL Target ID: 22226
Target Type: UNCHECKED
Pref Name: Unchecked
Confidence: Default value - Target unknown or has yet to be assigned
Relationship Type: Default value - Target has yet to be curated
Categorized Comment
ChEMBL Assay Type: Binding

ChEMBL Assay Data Source: Scientific Literature

Result Definitions
TIDNameDescriptionHistogramTypeUnit
OutcomeThe BioAssay activity outcomeOutcome
1Activity activity commentActivity activity commentString
2Activity standard flagActivity standard flagInteger
3Activity qualifierActivity qualifierString
4Activity published valueActivity published valueFloat
5Activity standard valueActivity standard valueFloat

Data Table (Concise)
PageFrom: