Cited by 102Stress Responses and CortisolBirth, Development, and HealthMaternal Mental Health During Pregnancy and Postpartum

Programming of stress-related behavior and epigenetic neural gene regulation in mice offspring through maternal exposure to predator odor

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St-Cyr, Sophie, McGowan, Patrick O.·2015·Frontiers in Behavioral Neuroscience

Abstract

Perinatal stress mediated through the mother can lead to long-term alterations in stress-related phenotypes in offspring. The capacity for adaptation to adversity in early life depends in part on the life history of the animal. This study was designed to examine the behavioral and neural response in adult offspring to prenatal exposure to predator odor: an ethologically-relevant psychological stressor. Pregnant mice were exposed daily to predator odors or distilled water control over the second half of the pregnancy. Predator odor exposure lead to a transient decrease in maternal care in the mothers. As adults, the offspring of predator odor-exposed mothers showed increased anti-predator behavior, a predator-odor induced decrease in activity and, in female offspring, an increased corticosterone (CORT) response to predator odor exposure. We found a highly specific response among stress-related genes within limbic brain regions. Transcript abundance of Corticotropin-releasing hormone receptor 1 (CRHR1) was elevated in the amygdala in adult female offspring of predator odor-exposed mothers. In the hippocampus of adult female offspring, decreased Brain-derived neurotrophic factor (BDNF) transcript abundance was correlated with a site-specific decrease in DNA methylation in Bdnf exon IV, indicating the potential contribution of this epigenetic mechanism to maternal programming by maternal predator odor exposure. These data indicate that maternal predator odor exposure alone is sufficient to induce an altered stress-related phenotype in adulthood, with implications for anti-predator behavior in offspring.

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Authors
St-Cyr, S., & McGowan, P. O.
Affiliations
University of Toronto (CA)
Corresponding author
McGowan, Patrick O.
Venue
Frontiers in Behavioral Neuroscience
Published
2015-06-01
Volume
9
Pages
145-145
ISSN
1662-5153 (ISSN-L)
OpenAlex
W1494806802
Cited by
102
References
51
Citations by year
2026: 3 · 2025: 7 · 2024: 8 · 2023: 9 · 2022: 6 · 2021: 11 · 2020: 13 · 2019: 16 · 2018: 5 · 2017: 12 · 2016: 11 · 2015: 1
FWCI
5.03
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Frontiers in Behavioral Neuroscience (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
Natural Sciences and Engineering Research Council of Canada
Topics
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Health Sciences › Medicine › Pediatrics, Perinatology and Child Health › Birth, Development, and Health
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Maternal Mental Health During Pregnancy and Postpartum
Keywords
prenatal stress, maternal programming, predator odor, antipredator behavior, maternal care, CRHR1, brain-derived neurotrophic factor, DNA methylation, epigenetic regulation, amygdala, hippocampus, limbic system, life history

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