Cited by 18Stress Responses and CortisolMemory and Neural MechanismsNeuroscience and Neuropharmacology Research

Effects of Novelty Stress on Hippocampal Gene Expression, Corticosterone and Motor Activity in Mice

Kurumaji, Akeo, Umino, Masakazu, Nishikawa, Toru·2011·Neuroscience Research

Abstract

Exposure to novelty, a mild psychological stressor, induces neuronal activations in the hippocampus of rodents, which may play an important role in the adaptation to stress. We examined the changes in three parameters, i.e., gene expression in the hippocampus using a RT-PCR method, corticosterone and motor activity, in mice exposed to a new environment for 120min. A sharp and short-lasting increase in the gene expression of a set of stress-related genes previously reported, e.g., Fos and Nr4a1, was observed during the stress, with a similar pattern of changes in corticosterone. The motor activity gradually decreased during the novelty stress, indicating a process of adaptation to the new environment. In addition, in order to minimize the effects of elevated adrenal hormones by the stress, we carried out experiments on adrenalectomized (ADX) mice. However, the adrenalectomy produced minimal changes in the pattern and the magnitude of the gene response after the stress, while the motor activity showed a relatively slower pattern of adaptation in the ADX mice. Hence, the present study suggests that there was a coordinated adaptation process to the new environment in mice, and that the transcriptional response was mediated by neuronal networks rather than by adrenal hormones.

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Crossref · 10.1016/j.neures.2011.06.006

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Authors
Kurumaji, A., Umino, M., & Nishikawa, T.
Affiliations
Tokyo Medical and Dental University (JP)
Corresponding author
Kurumaji, Akeo
Venue
Neuroscience Research
Publisher
Elsevier BV
Published
2011-10
Volume
71
Issue
2
Pages
161-167
ISSN
0168-0102 (ISSN-L)
OpenAlex
W2054138345
Cited by
18
References
46
Citations by year
2026: 1 · 2024: 3 · 2023: 1 · 2022: 1 · 2021: 1 · 2019: 2 · 2018: 1 · 2016: 1 · 2015: 3 · 2014: 1 · 2013: 2 · 2012: 1
FWCI
0.50
Type
journal article
Language
en
Open access
closed
Locations
  • Neuroscience Research (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Ministry of Education, Culture, Sports, Science and Technology
  • Ministry of Health, Labour and Welfare
Topics
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
novelty stress, hippocampus, gene expression, corticosterone, motor activity, FOS, Nur77, adrenalectomy, stress adaptation, adrenal hormones
MeSH terms
Adaptation, Physiological, Adrenalectomy, Animals, Corticosterone, Exploratory Behavior, Gene Expression Regulation, Hippocampus, Male, Mice, Inbred C57BL, Motor Activity, Stress, Psychological, Mice

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