Cited by 19Stress Responses and CortisolRegulation of Appetite and ObesityNeurotransmitter Receptor Influence on Behavior

Palatable Food Affects HPA Axis Responsivity and Forebrain Neurocircuitry in an Estrous Cycle-specific Manner in Female Rats

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Egan, Ann E., Thompson, Abigail M.K., Buesing, Dana, Fourman, Sarah M., Packard, Amy E.B., Terefe, Tegesty, Li, Dan, Wang, Xia +3 more·2018·Neuroscience

Abstract

Eating palatable foods can provide stress relief, but the mechanisms by which this occurs are unclear. We previously characterized a limited sucrose intake (LSI) paradigm in which twice-daily access to a small amount of 30% sucrose (vs. water as a control) reduces hypothalamic-pituitary-adrenocortical (HPA) axis responses to stress and alters neuronal activation in stress-regulatory brain regions in male rats. However, women may be more prone to 'comfort feeding' behaviors than men, and stress-related eating may vary across the menstrual cycle. This suggests that LSI effects may be sex- and estrous cycle-dependent. The present study therefore investigated the effects of LSI on HPA axis stress responsivity, as well as markers of neuronal activation/plasticity in stress- and reward-related neurocircuitry in female rats across the estrous cycle. We found that LSI reduced post-restraint stress plasma ACTH in female rats specifically during proestrus/estrus (P/E). LSI also increased basal (non-stress) FosB/deltaFosB- and pCREB-immunolabeling in the basolateral amygdala (BLA) and central amygdala specifically during P/E. Finally, Bayesian network modeling of the FosB/deltaFosB and pCREB expression data identified a neurocircuit that includes the BLA, nucleus accumbens, prefrontal cortex, and bed nucleus of the stria terminalis as likely being modified by LSI during P/E. When considered in the context of our prior results, the present findings suggest that palatable food reduces stress responses in female rats similar to males, but in an estrous cycle-dependent manner. Further, the BLA may contribute to the LSI effects in both sexes, whereas the involvement of other brain regions appears to be sex-dependent.

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Authors
Egan, A. E., Thompson, A. M. K., Buesing, D., Fourman, S. M., Packard, A. E. B., Terefe, T., Li, D., Wang, X., Song, S., Solomon, M. B., & Ulrich-Lai, Y. M.
Affiliations
  • University of Cincinnati (US)
  • University of Southern California (US)
Venue
Neuroscience
Publisher
Elsevier BV
Published
2018-08
Volume
384
Pages
224-240
ISSN
0306-4522 (ISSN-L)
OpenAlex
W2805053846
Cited by
19
References
169
Citations by year
2026: 2 · 2024: 3 · 2023: 1 · 2022: 3 · 2021: 3 · 2020: 1 · 2019: 6
FWCI
1.44
Type
journal article
Language
en
Open access
Locations
  • Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
NIH (R01 DK091425, T32 DK059803, F32 DK102334)
Topics
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
Keywords
palatable food, hypothalamic-pituitary-adrenal axis, stress responsivity, estrous cycle, female rats, emotional eating, basolateral amygdala, central amygdala, FosB/ΔFosB, CREB, nucleus accumbens, bed nucleus of the stria terminalis, prefrontal cortex, sex differences, restraint stress, ACTH
MeSH terms
Adrenal Glands, Adrenocorticotropic Hormone, Animals, Corticosterone, Estradiol, Female, Food, Hypothalamo-Hypophyseal System, Neural Pathways, Pituitary-Adrenal System, Restraint, Physical, Stress, Physiological, Stress, Psychological, Sucrose, Prosencephalon, Rats, Long-Evans, Estrous Cycle, Rats

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