Concept for simultaneous and specific in situ monitoring of amyloid oligomers and fibrils via Förster resonance energy transfer.
Oligomeric species of amyloidogenic peptides or proteins are often considered as the most toxic species in several amyloid disorders, like Alzheimer or Parkinson's diseases, and hence came into the focus of research interest and as a therapeutic target. An easy and specific monitoring of oligomeric species would be of high utility in the field, as it is the case for thioflavin T fluorescence for the fibrillar aggregates. Here, we show proof of concept for a new sensitive method to increase specific detection of oligomers by two extrinsic fluorophores. This is achieved by exploiting a Förster resonance energy transfer (FRET) between the two fluorophores. Thus, a mixture of two extrinsic fluorophores, bis-ANS and a styrylquinoxalin derivative, enabled one to monitor simultaneously and in situ the presence of oligomers and fibrils of amyloidogenic peptides. Thereby, the formation of oligomers and their transformation into fibrils can be followed.
CNRS, LCC (Laboratoire de Chimie de Coordination), 205 Route de Narbonne, BP 44099, F-31077 Toulouse Cedex 4 France.
Bruno
B
Alies
Helene
H
Eury
El Mokhtar
el M
Essassi
Genevieve
G
Pratviel
Christelle
C
Hureau
Peter
P
Faller
D000682:Amyloid / Q000032:analysis* / Q000737:chemistry*; D000817:Anilino Naphthalenesulfonates / Q000737:chemistry; D031541:Fluorescence Resonance Energy Transfer; D015394:Molecular Structure; D011810:Quinoxalines / Q000737:chemistry
D000682:Amyloid; D000817:Anilino Naphthalenesulfonates; D011810:Quinoxalines; C035763:5,5'-bis(8-(phenylamino)-1-naphthalenesulfonate)