MAPT and tauopathy: To further investigate tau‐mediated neuroinflammation, 3‐month‐old PS19 mice, a model of tauopathy, were administered vehicle (5% DMSO +30% PEG +5% Tween‐80; i.p.)or ibrutinib (10 mg/kg; i.p.)by injection daily for 14 consecutive days.