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Concerns regarding psychotomimetic effects limit the use of ketamine for certain patient populations. Reelin, an extracellular matrix glycoprotein, has shown promise as a putative fast-acting antidepressant in a model of chronic stress. However, research has not yet demonstrated the changes that occur rapidly after peripheral reelin administration. To address this key gap in knowledge, male Long\u2013Evans rats underwent a chronic corticosterone (CORT; or vehicle) paradigm (40\u2009mg\/kg, 21\u2009d). On day 21, rats were then administered an acute dose of ketamine (10\u2009mg\/kg, i.p.), reelin (3\u2009\u00b5g, i.v.), or vehicle. Twenty-four hours after administration, rats underwent behavioral or<jats:italic>in vivo<\/jats:italic>electrophysiological testing before killing. Immunohistochemistry was used to confirm changes in hippocampal reelin immunoreactivity. Lastly, the hippocampus was microdissected from fresh tissue to ascertain whole cell and synaptic-specific changes in protein expression through Western blotting. Chronic corticosterone induced a chronic stress phenotype in the forced swim test and sucrose preference test (SPT). Both reelin and ketamine rescued immobility and swimming, however reelin alone rescued latency to immobility.<jats:italic>In vivo<\/jats:italic>electrophysiology revealed decreases in hippocampal long-term potentiation (LTP) after chronic stress which was increased significantly by both ketamine and reelin. Reelin immunoreactivity in the dentate gyrus paralleled the behavioral and electrophysiological findings, but no significant changes were observed in synaptic-level protein expression. This exploratory research supports the putative rapid-acting antidepressant effects of an acute dose of reelin across behavioral, electrophysiological, and molecular measures.<\/jats:p>","DOI":"10.1523\/eneuro.0106-23.2023","type":"journal-article","created":{"date-parts":[[2023,8,7]],"date-time":"2023-08-07T17:50:26Z","timestamp":1691430626000},"page":"ENEURO.0106-23.2023","source":"Crossref","is-referenced-by-count":17,"title":["Reelin Rescues Behavioral, Electrophysiological, and Molecular Metrics of a Chronic Stress Phenotype in a Similar Manner to Ketamine"],"prefix":"10.1523","volume":"10","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2986-3179","authenticated-orcid":false,"given":"Jenessa 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