دورية أكاديمية
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Sex Differences in the Spatial Behavior Functions of Adult-Born Neurons in Rats.

التفاصيل البيبلوغرافية
العنوان: Sex Differences in the Spatial Behavior Functions of Adult-Born Neurons in Rats.
المؤلفون: O'Leary TP; Department of Psychology, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, British Columbia, V6T 2B5, Canada., Askari B; Department of Psychology, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, British Columbia, V6T 2B5, Canada., Lee BH; Department of Psychology, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, British Columbia, V6T 2B5, Canada., Darby K; Department of Psychology, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, British Columbia, V6T 2B5, Canada., Knudson C; Department of Psychology, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, British Columbia, V6T 2B5, Canada., Ash AM; Department of Psychology, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, British Columbia, V6T 2B5, Canada., Seib DR; Department of Psychology, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, British Columbia, V6T 2B5, Canada., Espinueva DF; Department of Psychology, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, British Columbia, V6T 2B5, Canada., Snyder JS; Department of Psychology, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, British Columbia, V6T 2B5, Canada jasonsnyder@psych.ubc.ca.
المصدر: ENeuro [eNeuro] 2022 May 12; Vol. 9 (3). Date of Electronic Publication: 2022 May 12 (Print Publication: 2022).
نوع المنشور: Journal Article; Research Support, Non-U.S. Gov't
اللغة: English
بيانات الدورية: Publisher: Society for Neuroscience Country of Publication: United States NLM ID: 101647362 Publication Model: Electronic-Print Cited Medium: Internet ISSN: 2373-2822 (Electronic) Linking ISSN: 23732822 NLM ISO Abbreviation: eNeuro Subsets: MEDLINE
أسماء مطبوعة: Original Publication: [Washington, DC] : Society for Neuroscience, [2014]-
مواضيع طبية MeSH: Neurogenesis*/physiology , Sex Characteristics*, Animals ; Female ; Hippocampus/metabolism ; Male ; Maze Learning/physiology ; Neurons/physiology ; Rats ; Spatial Learning
مستخلص: Adult neurogenesis modifies hippocampal circuits and behavior, but removing newborn neurons does not consistently alter spatial processing, a core function of the hippocampus. Additionally, little is known about sex differences in neurogenesis since few studies have compared males and females. Since adult-born neurons regulate the stress response, we hypothesized that spatial functions may be more prominent under aversive conditions and may differ between males and females given sex differences in stress responding. We therefore trained intact and neurogenesis-deficient rats in the spatial water maze at temperatures that vary in their degree of aversiveness. In the standard water maze, ablating neurogenesis did not alter spatial learning in either sex. However, in cold water, ablating neurogenesis had divergent sex-dependent effects: relative to intact rats, male neurogenesis-deficient rats were slower to escape the maze and female neurogenesis-deficient rats were faster. Neurogenesis promoted temperature-related changes in search strategy in females, but it promoted search strategy stability in males. Females displayed greater recruitment (Fos expression) of the dorsal hippocampus than males, particularly in cold water. However, blocking neurogenesis did not alter Fos expression in either sex. Finally, morphologic analyses revealed greater experience-dependent plasticity in males. Adult-born neurons in males and females had similar morphology at baseline but training increased spine density and reduced presynaptic terminal size, specifically in males. Collectively, these findings indicate that adult-born neurons contribute to spatial learning in stressful conditions and they provide new evidence for sex differences in their behavioral functions.
(Copyright © 2022 O’Leary et al.)
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فهرسة مساهمة: Keywords: hippocampus; learning and memory; neurogenesis; plasticity; sex differences; strategy
تواريخ الأحداث: Date Created: 20220427 Date Completed: 20220517 Latest Revision: 20220823
رمز التحديث: 20221213
مُعرف محوري في PubMed: PMC9116935
DOI: 10.1523/ENEURO.0054-22.2022
PMID: 35473765
قاعدة البيانات: MEDLINE
الوصف
تدمد:2373-2822
DOI:10.1523/ENEURO.0054-22.2022