MAPT and Alzheimer disease: These results are corroborated by Ferrer et al. [122], who recently published an interesting study that showed oligodendrocytes are highly involved in Tau spreading in the brain after brain homogenate injections from patients with different tauopathies, including AD, primary age-related tauopathy (PART), aging-related tau astrogliopathy (ARTAG) and globular glial tauopathy (GGT).