Distinct Mechanisms by Mutant Presenilin 1 and 2 Leading to Increased Intracellular Levels of Amyloid β-Protein 42 in Chinese Hamster Ovary Cells

Abstract excerpt

To characterize the properties of presenilin (PS) 1- and PS2-associated gamma-secretases, we established stable transfectants overexpressing amyloid precursor protein and wild-type (wt) or a number of mutant (mt) PS1 or PS2. Quantification of the intracellular amyloid beta-protein (Abeta) levels in mtPS1 and mtPS2 cell lines revealed the presence of two subtypes. One group consists of N141I, M239V, and T122P...