Chronic activation of a negative engram induces behavioral and cellular abnormalities.

ABSTRACT: Negative memories engage a brain and body-wide stress response in humans that can alter cognition and behavior. Prolonged stress responses induce maladaptive cellular, circuit, and systems-level changes that can lead to pathological brain states and corresponding disorders in which mood and memory are affected. However, it is unclear if repeated activation of cells processing negative memories induces similar phenotypes in mice. In this study, we used an activity-dependent tagging method to access neuronal ensembles and assess their molecular characteristics. Sequencing memory engrams in mice revealed that positive (male-to-female exposure) and negative (foot shock) cells upregulated genes linked to anti- and pro-inflammatory responses, respectively. To investigate the impact of persistent

SUBMITTER: Jellinger AL 

PROVIDER: S-EPMC11239178 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature