1 Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, East Melbourne, 3002, VIC, Australia. xavier.hadoux@unimelb.edu.au.
2 Ophthalmology, Department of Surgery, University of Melbourne, Parkville, 3010, VIC, Australia. xavier.hadoux@unimelb.edu.au.
3 Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, East Melbourne, 3002, VIC, Australia.
4 Ophthalmology, Department of Surgery, University of Melbourne, Parkville, 3010, VIC, Australia.
5 Department of Optometry and Vision Sciences, University of Melbourne, Parkville, 3010, VIC, Australia.
6 The Florey Institute, The University of Melbourne, Parkville, 3010, VIC, Australia.
7 Faculty of Medicine, Nursing and Health Sciences, Monash University, Clayton, 3800, VIC, Australia.
8 Neuropsychiatry Unit, North Western Mental Health, Melbourne Health, Royal Melbourne Hospital, Parkville, 3050, VIC, Australia.
9 University of Melbourne, Department of Psychiatry, Parkville, 3010, VIC, Australia.
10 Austin Health, Melbourne, 3084, VIC, Australia.
11 Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Melbourne, 3122, VIC, Australia.
12 OzGrav-Swinburne, Centre for Astrophysics & Supercomputing, Swinburne University of Technology, Melbourne, 3122, VIC, Australia.
13 Advanced Visualisation Laboratory, Digital Research Innovation Capability Platform, Swinburne University of Technology, Melbourne, 3122, VIC, Australia.
14 McConnell Brain Imaging Centre, Montreal Neurological Institute, McGill University, Montreal, H3A 2B4, QC, Canada.
15 PERFORM Centre, Concordia University, Montreal, H4B 1R6, QC, Canada.
16 École Polytechnique de Montréal, Institut de génie biomédical, Département de Génie électrique, Montreal, H3C 3A7, QC, Canada.
17 Research Center, Montreal Heart Institute, Montreal, H1T 1C8, QC, Canada.
18 Optina Diagnostics, Montreal, H4T 1Z2, QC, Canada.
19 Translational Neuroimaging Laboratory, McGill Centre for Studies in Aging, Douglas Mental Health University Institute, Montreal, H4H 1R3, QC, Canada.
20 Alzheimer's Disease Research Unit, The McGill University Research Centre for Studies in Aging, McGill University, Montreal, H4H 1R3, QC, Canada.
21 MoCA Clinic and Institute, Greenfield Park, J4V 2J2, QC, Canada.
22 Clinique ophtalmologique 2121, Montreal, H3H 1G6, QC, Canada.
23 Département de médecine nucléaire, Hôpital Maisonneuve-Rosemont, Montreal, H1T 2M4, QC, Canada.
24 Singapore Eye Research Institute, Singapore National Eye Centre, Singapore, 169856, Singapore.
25 Murdoch Children's Research Institute and Department of Paediatrics, University of Melbourne, Melbourne, 3052, VIC, Australia.
26 Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, East Melbourne, 3002, VIC, Australia. peterv@unimelb.edu.au.
27 Ophthalmology, Department of Surgery, University of Melbourne, Parkville, 3010, VIC, Australia. peterv@unimelb.edu.au.

Non-invasive in vivo hyperspectral imaging of the retina for potential biomarker use in Alzheimer's disease.

Nat Commun. 2019 Sep 17;10(1):4227

Authors: Hadoux X, Hui F, Lim JKH, Masters CL, Pébay A, Chevalier S, Ha J, Loi S, Fowler CJ, Rowe C, Villemagne VL, Taylor EN, Fluke C, Soucy JP, Lesage F, Sylvestre JP, Rosa-Neto P, Mathotaarachchi S, Gauthier S, Nasreddine ZS, Arbour JD, Rhéaume MA, Beaulieu S, Dirani M, Nguyen CTO, Bui BV, Williamson R, Crowston JG, van Wijngaarden P

Abstract

Studies of rodent models of Alzheimer's disease (AD) and of human tissues suggest that the retinal changes that occur in AD, including the accumulation of amyloid beta (Aß), may serve as surrogate markers of brain Aß levels. As Aß has a wavelength-dependent effect on light scatter, we investigate the potential for in vivo retinal hyperspectral imaging to serve as a biomarker of brain Aß. Significant differences in the retinal reflectance spectra are found between individuals with high Aß burden on brain PET imaging and mild cognitive impairment (n?=?15), and age-matched PET-negative controls (n?=?20). Retinal imaging scores are correlated with brain Aß loads. The findings are validated in an independent cohort, using a second hyperspectral camera. A similar spectral difference is found between control and 5xFAD transgenic mice that accumulate Aß in the brain and retina. These findings indicate that retinal hyperspectral imaging may predict brain Aß load.

PMID: 31530809 [PubMed - in process]