RBFOX3 and Alzheimer disease: For this purpose, we used stereological techniques for neurons, PHFTau and Aβ plaques stainings (Nissl; NeuN; Aβ; PHFTau-AT8; PHFTau-pS396) to study the DG, CA3, CA1 and subiculum from the hippocampus of 11 demented AD patients.