CD68 and Alzheimer disease: CD68‐positive microglia were mainly detected in the MSS zone surrounding Aβ plaques in the HFD‐fed AppNL−F/NL−F hippocampus, as reported in AppNL−G−F/NL−G−F mice with another toxic Arctic “G” mutation exhibiting more severe AD pathology (Castillo et al., 2017; Saito et al., 2014).