Dmitry: as the paper itself notes, the most likely mechanism for the ability of hydroxypropyl - β - cyclodextrin to lower Aβ burden in the mouse model is AD finding is by normalizing membrane cholesterol content and reducing the appearance of abnormal cathepsin D -
positive lysosomes, leading to reduced beta - secretase cleavage of APP and an upregulation of genes involved in cholesterol trafficking and Aβ clearance.
A beta 42 first selectively accumulates in the perikaryon of pyramidal cells as discrete, granules that appear to be cathepsin D -
positive, suggesting that they may represent
lysosomes or
lysosome - derived structures.