MAPT and tauopathy: Double-labeling immunofluorescence with anti-phospho-tau antibodies (AT8) and antibodies directed to phosphorylated p38 kinase (p38-P Thr180-Tyr182), examined with confocal microscopy, identified co-localization of tau and active p38 (p38-P) in oligodendrocytes in mice inoculated with sarkosyl-insoluble fractions from tauopathies.