MAPT and tauopathy: ARTAG homogenates produce tau seeding and spreading in neurons, oligodendrocytes and threads in WT mice, but astrocytes are rather resistant to producing tau inclusions following inoculation of ARTAG homogenates (Ferrer et al., 2018) and homogenates from other tauopathies in WT mice (Ferrer et al., 2019, 2020a,b), unless large amounts of tau are inoculated (Narasimhan et al., 2017).