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In this study, we report the results of a comprehensive phenotyping of the retina of the  App   NL - G - F   mouse. We demonstrate that soluble Aβ accumulation is present in the retina of these mice early in life and progresses to Aβ plaque formation by midlife. This rising Aβ burden coincides with local microglia reactivity, astrogliosis, and abnormalities in retinal vein morphology. Electrophysiological recordings revealed signs of neuronal dysfunction yet no overt neurodegeneration was observed and visual performance outcomes were unaffected in the  App   NL - G - F   mouse. Furthermore, we show that hyperspectral imaging can be used to quantify retinal Aβ, underscoring its potential as a biomarker for AD diagnosis and monitoring. These findings suggest that the  App   NL - G - F   retina mimics the early, preclinical stages of AD, and, together with retinal imaging techniques, offers unique opportunities for drug discovery and fundamental research into preclinical AD.   Electronic supplementary material  The online version of this article (10.1186/s40478-020-01102-5) contains supplementary material, which is available to authorized users.

The AppNL-G-F mouse retina is a site for preclinical Alzheimer’s disease diagnosis and research