Aftin-4抑制劑Aftin-4, an amyloid forty-two inducer, activates γ-secretase, promoting the generation of amyloid-β-1-42 (Aβ1-42) from amyloid-β protein precursor. Aftin-4 increased Aβ-1-42, but not Aβ-1-40 in mouse hipppocampus, accompanied by learning deficit