Cited by 183Circadian rhythm and melatoninStress Responses and CortisolSleep and Wakefulness Research

Disruption of circadian rhythms due to chronic constant light leads to depressive and anxiety-like behaviors in the rat

Tapia-Osorio, Araceli, Salgado-Delgado, Roberto, Angeles-Castellanos, Manuel, Escobar, Carolina·2013·Behavioural Brain Research

Abstract

Depression is strongly associated with the circadian system, disruption of the circadian system leads to increased propensity to disease and to mood disorders including depression. The present study explored in rats the effects of circadian disruption by constant light on behavioral and hormonal indicators of a depressive-like condition and on the biological clock, the suprachiasmatic nucleus (SCN). Exposure to constant light for 8 weeks resulted in loss of circadian patterns of spontaneous general activity, melatonin and corticosterone. Moreover these rats exhibited anhedonia in a sucrose consumption test, and increased grooming in the open-field test, which reflects an anxiety-like condition. In the SCN decreased cellular activation was observed by c-Fos immunohistochemistry. In rats exposed to constant darkness, circadian behavioral and hormonal patterns remained conserved, however mild depressive-like indicators were observed in the anhedonia test and mild anxiety-like behaviors were observed in the open field test. Data indicate that chronic conditions of LL or DD are both disruptive for the activity of the SCN leading to depression- and anxiety-like behavior. Present results point out the main role played by the biological clock and the risk of altered photoperiods on affective behavior.

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Crossref · 10.1016/j.bbr.2013.05.028

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  • Rats exposed to 8 weeks of constant light exhibit increased depressive-like behavior concurrent with loss of diurnal rhythms in activity, melatonin, and corticosterone.

    “Rats exposed to 8 weeks of constant light exhibit increased depressive-like behavior concurrent with loss of diurnal rhythms in activity, melatonin, and corticosterone92.”

    From Circadian rhythm disruption and mental health (2020) · cites this paper as [92]

  • Housing adult rats chronically in constant light induces anxiety-like behavioral responses.

    “For example, housing adult rats chronically in constant light induces anxiety-like behavioral responses92.”

    From Circadian rhythm disruption and mental health (2020) · cites this paper as [92]

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Authors
Tapia-Osorio, A., Salgado-Delgado, R., Angeles-Castellanos, M., & Escobar, C.
Affiliations
Universidad Nacional Autónoma de México (MX)
Corresponding author
Escobar, Carolina
Venue
Behavioural Brain Research
Publisher
Elsevier BV
Published
2013-09
Volume
252
Pages
1-9
ISSN
0166-4328 (ISSN-L)
OpenAlex
W2038826847
Cited by
183
References
51
Citations by year
2026: 12 · 2025: 12 · 2024: 15 · 2023: 21 · 2022: 15 · 2021: 19 · 2020: 15 · 2019: 14 · 2018: 19 · 2017: 13 · 2016: 8 · 2015: 8 · 2014: 8 · 2013: 3
FWCI
4.87
Type
journal article
Language
en
Open access
closed
Locations
  • Behavioural Brain Research (publishedVersion)
  • PubMed (publishedVersion)
Funders
Consejo Nacional de Ciencia y Tecnología
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
Keywords
circadian rhythm disruption, constant light, depression-like behavior, anxiety-like behavior, suprachiasmatic nucleus, melatonin, corticosterone, anhedonia, sucrose intake, grooming, c-fos, biological clock, photoperiod, constant darkness, emotional behavior
MeSH terms
Analysis of Variance, Animals, Anxiety, Body Weight, Cell Count, Corticosterone, Depression, Disease Models, Animal, Eating, Exploratory Behavior, Food Preferences, Light, Male, Melatonin, Motor Activity, Sucrose, Suprachiasmatic Nucleus, Sweetening Agents, Proto-Oncogene Proteins c-fos, Rats, Wistar, Chronobiology Disorders, Rats

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