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[Sex difference in performance in elevated plus maze and hippocampal GluR1 level].

Xiaojun Xiang1, Wei Hao, Therese A Kosten

  • 1Department of Psychiatry, Second Xiangya Hospital, Central South University, Changsha 410011, China.

Zhong Nan Da Xue Xue Bao. Yi Xue Ban = Journal of Central South University. Medical Sciences
|September 23, 2011
PubMed
Summary

Sex differences in rat behavior and brain chemistry were observed. Female rats showed less anxiety in the elevated plus maze (EPM) and lower hippocampal GluR1 levels compared to males.

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Area of Science:

  • Neuroscience
  • Behavioral Science
  • Molecular Biology

Background:

  • The elevated plus maze (EPM) is a standard behavioral test to assess anxiety-like behaviors in rodents.
  • Glutamate receptor subunit 1 (GluR1) plays a crucial role in synaptic plasticity and learning and memory processes within the hippocampus.

Purpose of the Study:

  • To investigate potential sex differences in anxiety-like behaviors using the EPM.
  • To determine if sex differences exist in GluR1 protein levels in the hippocampus of Sprague-Dawley rats.

Main Methods:

  • Adult male and female Sprague-Dawley rats were subjected to a 5-minute elevated plus maze test.
  • Following behavioral testing, hippocampal tissues were collected for protein extraction.
  • Western blot analysis was employed to quantify GluR1 levels in hippocampal samples.

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Main Results:

  • Female rats displayed significantly reduced anxiety-like behaviors in the EPM compared to male rats (P<0.05).
  • Lower levels of GluR1 were detected in the total and left hippocampus of female rats relative to male rats (P<0.05).

Conclusions:

  • Significant sex differences were identified in both elevated plus maze performance and hippocampal GluR1 expression.
  • These findings suggest a neurobiological basis for sex-specific differences in anxiety and potentially related cognitive functions.