Current model for potential interactions among AβPP, cKit, Shp2, and Gab2. Gab2 is a scaffold protein found by GWAS to be associated with AD. Inhibition of cKit and Shp2 increases AβPP phosphorylation on the Y743 residue resulting in a reduction in Aβ production. Kinase and phosphatase inhibitors that increased AβPP phosphorylation and reduced Aβ formation are in pink boxes. Yellow P, pSer; Green P, pTyr; SCF, stem cell factor.