Journal
NEUROSCIENCE LETTERS
Volume 555, Issue -, Pages 137-142Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.neulet.2013.09.031
Keywords
Corticosterone; Stress susceptibility; Restraint stress; Anxiety
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Funding
- National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology [2009-0075797, 2009-0085840]
- National Research Foundation of Korea [2009-0075797, 2009-0085840] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Corticosterone is released in response to stress and manifests as various bodily stress responses in rodents. While corticosterone reflects acute adaptive responses, how the basal steady-state corticosterone level relates to the subsequent stress response is largely unknown. Here, we investigated how basal corticosterone levels can affect the susceptibility to chronic restraint stress in mice. We designed a longitudinal experiment, enabling us to compare the basal corticosterone level and the subsequent response to repeated restraint stress within the same animal. We found that the mice had differential changes in plasma corticosterone levels, which either increased or decreased, with exposure to chronic stress. These differential changes reflected the differential stress susceptibility of the mice, as evaluated by changes in body weight. The extent of the changes in corticosterone level during chronic stress exposure was predicted by the basal corticosterone level. In addition, the behavioral consequence of chronic stress was also correlated with the basal corticosterone level prior to chronic stress experience. These data reveal that the basal steady-state corticosterone level is a predictor of stress susceptibility or resilience to subsequent stress exposures. (C) 2013 Elsevier Ireland Ltd. All rights reserved.
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