Perani, Clara V. and Neumann, Inga D. and Reber, Stefan O. and Slattery, David A. (2015) High-fat diet prevents adaptive peripartum-associated adrenal gland plasticity and anxiolysis. SCIENTIFIC REPORTS, 5: 14821. ISSN 2045-2322,
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Maternal obesity is associated with lower basal plasma cortisol levels and increased risk of postpartum psychiatric disorders. Given that both obesity and the peripartum period are characterized by an imbalance between adrenocorticotropic hormone (ACTH) and cortisol, we hypothesized that the adrenal glands undergo peripartum-associated plasticity and that such changes would be prevented by a high-fat diet (HFD). Here, we demonstrate substantial peripartum adrenal gland plasticity in the pathways involved in cholesterol supply for steroidogenesis in female rats. In detail, the receptors involved in plasma lipid uptake, low density lipoprotein (LDL) receptor (LDLR) and scavenger receptor class B type 1 (SRB1), are elevated, intra-adrenal cholesterol stores are depleted, and a key enzyme in de novo cholesterol synthesis, hydroxymethylglutaryl coenzyme A reductase (HMGCR), is downregulated; particularly at mid-lactation. HFD prevented the lactation-associated anxiolysis, basal hypercorticism, and exaggerated the corticosterone response to ACTH. Moreover, we show that HFD prevented the downregulation of adrenal cholesterol stores and HMGCR expression, and LDLR upregulation at mid-lactation. These findings show that the adrenal gland is an important regulator of peripartum-associated HPA axis plasticity and that HFD has maladaptive consequences for the mother, partly by preventing these neuroendocrine and also behavioural changes.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | CHRONIC PSYCHOSOCIAL STRESS; CIRCADIAN VARIATION; PREGNANT RATS; POSTPARTUM; AXIS; RESPONSES; ANXIETY; CORTICOSTERONE; LACTATION; OBESITY; |
| Subjects: | 500 Science > 590 Zoological sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Zoologie > Tierphysiologie/Neurobiologie (Prof. Dr. Inga Neumann) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 06 Jun 2019 07:21 |
| Last Modified: | 06 Jun 2019 07:21 |
| URI: | https://pred.uni-regensburg.de/id/eprint/4629 |
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