6533b7d8fe1ef96bd126ad02
RESEARCH PRODUCT
Phasor-FLIM analysis of Thioflavin T self-quenching in Concanavalin amyloid fibrils
Giuseppe SancataldoSara AnselmoValeria Vetrisubject
Fluorescence-lifetime imaging microscopyAmyloidFLIMHistologyAmyloid02 engineering and technologyProtein aggregationprotein aggregation03 medical and health scienceschemistry.chemical_compound0302 clinical medicineself-quenchingmental disordersamyloid fibrilConcanavalin Afluorescence lifetimeHumansBenzothiazolesInstrumentationFluorescent DyesInclusion BodiesQuenching (fluorescence)biologyStaining and LabelingChemistryOptical ImagingPhasorNeurodegenerative Diseases030206 dentistry021001 nanoscience & nanotechnologyFluorescenceSettore FIS/07 - Fisica Applicata(Beni Culturali Ambientali Biol.e Medicin)Medical Laboratory TechnologyMicroscopy FluorescenceConcanavalin APhasorbiology.proteinBiophysicsThioflavin TThioflavinamyloid fibrils Concanavalin A FLIM fluorescence lifetime Phasor protein aggregation self-quenching Thioflavin TAnatomy0210 nano-technologydescription
The formation of amyloid structures has traditionally been related to human neurodegenerative pathologies and, in recent years, the interest in these highly stable nanostructures was extended to biomaterial sciences. A common method to monitor amyloid growth is the analysis of Thioflavin T fluorescence. The use of this highly selective dye, diffused worldwide, allows mechanistic studies of supramolecular assemblies also giving back important insight on the structure of these aggregates. Here we present experimental evidence of self-quenching effect of Thioflavin T in presence of amyloid fibrils. A significant reduction of fluorescence lifetime of this dye which is not related to the properties of analyzed amyloid structures is found. This result is achieved by coupling Fluorescence Lifetime Imaging Microscopy with phasor approach as suitable model-free methods and constitute a serious warning that have to be taken in account if is dye is used for quantitative studies.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-03-17 |