Accumulation of neurotoxic amyloid beta peptides (Ab) in the brain is considered to be the central event in the pathogenesis of Alzheimer’s disease (AD). Ab is released from the beta-amyloid precursor protein (APP) during specialised processing events. This proposal aims to examine presenilin 2 (PS2) protein-mediated molecular and cellular events that are protective against Ab accumulation and AD and, as such, is aligned with the objective of the FP7’s Health Research Programme that focuses on “Research on the brain and related diseases”.