Early Life Stress and Post-Weaning High Fat Diet Alter Tyrosine Hydroxylase Regulation and AT1 Receptor Expression in the Adrenal Gland in a Sex Dependent Manner
Article
Article Title | Early Life Stress and Post-Weaning High Fat Diet Alter Tyrosine Hydroxylase Regulation and AT1 Receptor Expression in the Adrenal Gland in a Sex Dependent Manner |
---|---|
ERA Journal ID | 14489 |
Article Category | Article |
Authors | Bobrovskaya, Larisa, Maniam, Jayanthi, Ong, Lin Kooi, Dunkley, Peter R. and Morris, Margaret J. |
Journal Title | Neurochemical Research |
Journal Citation | 38 (4), pp. 826-833 |
Number of Pages | 8 |
Year | Apr 2013 |
Place of Publication | United States |
ISSN | 0364-3190 |
1573-6903 | |
Digital Object Identifier (DOI) | https://doi.org/10.1007/s11064-013-0985-4 |
Web Address (URL) | https://link.springer.com/article/10.1007/s11064-013-0985-4 |
Abstract | Previous studies have shown that early life stress induced by maternal separation or non-handling can lead to behavioural deficits in rats and that these deficits can be alleviated by providing palatable cafeteria high-fat diet (HFD). In these studies we investigated the effects of maternal separation or non-handling and HFD on tyrosine hydroxylase (TH) protein and TH phosphorylation at Ser40 (pSer40TH) and the expression of angiotensin II receptor type 1 (AT1R) protein in the adrenal gland as markers of sympatho-adrenomedullary activation. After littering, Sprague-Dawley rats were assigned to short maternal separation, S15 (15 min), prolonged maternal separation, S180 (180 min) daily from postnatal days 2-14 or were non-handled (NH) until weaning. Siblings were exposed to HFD or chow from day 21 until 19 weeks when adrenals were harvested. Maternal separation and non-handling had no effects on adrenal TH protein in both sexes. We found an effect of HFD only in the females; HFD significantly increased TH levels in NH rats and pSer40TH in S180 rats (relative to corresponding chow-fed groups), but had no effect on AT1R expression in any group. In contrast, in male rats HFD had no effect on TH protein levels, but significantly increased pSer40TH across all treatment groups. There was no effect of HFD on AT1R expression in male rats; however, maternal separation (for 15 or 180 min) caused significant increases in AT1R expression (relative to NH group regardless of diet). This is the first study to report that early life stress and diet modulate TH protein, pSer40TH and AT1R protein levels in the adrenal gland in a sex dependent manner. These results are interpreted in respect to the potential adverse effects that these changes in the adrenal gland may have in males and females in adult life. |
Keywords | Early life stress; High fat diet; Adrenal gland; Tyrosine hydroxylase; Angiotensin receptor |
Public Notes | There are no files associated with this item. |
Byline Affiliations | University of South Australia |
University of New South Wales | |
University of Newcastle |
https://research.usq.edu.au/item/y82wv/early-life-stress-and-post-weaning-high-fat-diet-alter-tyrosine-hydroxylase-regulation-and-at1-receptor-expression-in-the-adrenal-gland-in-a-sex-dependent-manner
27
total views0
total downloads1
views this month0
downloads this month