A method for screening a reagent for treating or preventing Alzheimer's disease or related neurological pathology includes the steps of: (a) activating a receptor and determining a first extent of endocytosis of the receptor, wherein the receptor is a G-protein coupled receptor that associates with presenilin-1; (b) activating the receptor under the same conditions as in step (a), in the presence of a candidate reagent, and determining a second extent of endocytosis of the receptor; (c) determining a difference between the first extent of endocytosis and the second extent of endocytosis; and (d) repeating steps (a)-(c), if the difference is less than a threshold. Uses of receptor antagonists for manufacturing medicaments for treating or preventing Alzheimer's disease or related neurological pathology, wherein the receptor antagonists inhibit endocytosis of a G-protein coupled receptor that associates with presenilin-1 during endocytosis.

 
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