Journal
ANALYTICAL CHEMISTRY
Volume 86, Issue 23, Pages 11877-11882Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ac503509g
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- Region Midi-Pyrenees [APRTCN09004783]
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Oligomeric species of amyloidogenic peptides or proteins are often considered as the most toxic species in several amyloid disorders, like Alzheimer or Parkinsons 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 Forster 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.
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