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Ultraviolet–visible–near-infrared optical properties of amyloid fibrils shed light on amyloidogenesis

Authors
Pansieri, Jonathan
Josserand, Véronique
Lee, Sun-Jae
Rongier, Anaëlle
Imbert, Daniel
Sallanon, Marcelle Moulin
Dane, Thomas G.
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Published in Nature Photonics. 2019, vol. 13, no. 7, p. 473-479
Abstract Amyloid fibres attract considerable interest due to their biological role in neurodegenerative diseases and their potential as functional biomaterials. Here, we describe an intrinsic signal of amyloid fibres in the near-infrared range. When combined with their recently reported blue luminescence, it paves the way towards new blueprints for the label-free detection of amyloid deposits in in vitro and in vivo contexts. The blue luminescence allows for staining-free characterization of amyloid deposits in human samples. The near-infrared signal offers promising prospects for innovative diagnostic strategies for neurodegenerative diseases—to improve medical care and for the development of new therapies. As a proof of concept, we demonstrate direct detection of amyloid deposits within brains of living, aged mice with Alzheimer’s disease using non-invasive and contrast-agent-free imaging. Ultraviolet–visible–near-infrared optical properties of amyloids open new research avenues for amyloidosis as well as for next-generation biophotonic devices.
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Other version: http://www.nature.com/articles/s41566-019-0422-6
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Research group Neuroimagerie moléculaire en psychiatrie (983)
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PANSIERI, Jonathan et al. Ultraviolet–visible–near-infrared optical properties of amyloid fibrils shed light on amyloidogenesis. In: Nature Photonics, 2019, vol. 13, n° 7, p. 473-479. https://archive-ouverte.unige.ch/unige:120395

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Deposited on : 2019-07-05

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