Scanning ultrasound removes amyloid-β and restores memory in an Alzheimer's disease mouse model.
Author: Leinenga G1, Götz J2
Affiliation:
1Clem Jones Centre for Ageing Dementia Research, Queensland Brain Institute, The University of Queensland, St Lucia Campus, Brisbane, Queensland 4072, Australia.
2Clem Jones Centre for Ageing Dementia Research, Queensland Brain Institute, The University of Queensland, St Lucia Campus, Brisbane, Queensland 4072, Australia. j.goetz@uq.edu.au.
Conference/Journal: Sci Transl Med.
Date published: 2015 Mar 11
Other:
Volume ID: 7 , Issue ID: 278 , Pages: 278ra33 , Special Notes: doi: 10.1126/scitranslmed.aaa2512. , Word Count: 190
Amyloid-β (Aβ) peptide has been implicated in the pathogenesis of Alzheimer's disease (AD). We present a nonpharmacological approach for removing Aβ and restoring memory function in a mouse model of AD in which Aβ is deposited in the brain. We used repeated scanning ultrasound (SUS) treatments of the mouse brain to remove Aβ, without the need for any additional therapeutic agent such as anti-Aβ antibody. Spinning disk confocal microscopy and high-resolution three-dimensional reconstruction revealed extensive internalization of Aβ into the lysosomes of activated microglia in mouse brains subjected to SUS, with no concomitant increase observed in the number of microglia. Plaque burden was reduced in SUS-treated AD mice compared to sham-treated animals, and cleared plaques were observed in 75% of SUS-treated mice. Treated AD mice also displayed improved performance on three memory tasks: the Y-maze, the novel object recognition test, and the active place avoidance task. Our findings suggest that repeated SUS is useful for removing Aβ in the mouse brain without causing overt damage, and should be explored further as a noninvasive method with therapeutic potential in AD.
Copyright © 2015, American Association for the Advancement of Science.
PMID: 25761889 DOI: 10.1126/scitranslmed.aaa2512
BACK
