Lijing Wang, Lauren Park, Weisheng Wu, Dana King, Alexis Vega-Medina, Frank Raven, Jessy Martinez, Amy Ensing, Katherine McDonald, Zhongying Yang, Sha Jiang, Sara J Aton
Post-learning sleep is essential for hippocampal memory processing, including contextual fear memory consolidation. We labeled context-encoding engram neurons in the hippocampal dentate gyrus (DG) and assessed reactivation of these neurons after fear learning. Post-learning sleep deprivation (SD) selectively disrupted reactivation of inferior blade DG engram neurons, linked to SD-induced suppression of neuronal activity in the inferior, but not superior DG blade. Subregion-specific spatial profiling of transcripts revealed that transcriptomic responses to SD differed greatly between hippocampal CA1, CA3, and DG inferior blade, superior blade, and hilus...
April 19, 2024: IScience