REV-ERBα (NR1D1) is a circadian transcriptional repressor that plays a role in the regulation of lipid metabolism and macrophage function, and the global deletion of REV-ERBα has been previously linked to increased microglial activation and mitigation of amyloid plaque formation. In the current study, researchers from Washington University in St Louis and affiliated organizations aimed to explore the cell-autonomous effects of microglial REV-ERBα on tau pathology.