The Effect of Social Defeat on Tyrosine Hydroxylase Phosphorylation in the Rat Brain and Adrenal Gland
Article
Article Title | The Effect of Social Defeat on Tyrosine Hydroxylase Phosphorylation in the Rat Brain and Adrenal Gland |
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ERA Journal ID | 14489 |
Article Category | Article |
Authors | Ong, Lin Kooi, Bobrovskaya, Larisa, Walker, Frederick R., Day, Trevor A., Dickson, Phillip W. and Dunkley, Peter R. |
Journal Title | Neurochemical Research |
Journal Citation | 36 (1), pp. 27-33 |
Number of Pages | 7 |
Year | Jan 2011 |
Place of Publication | United States |
ISSN | 0364-3190 |
1573-6903 | |
Digital Object Identifier (DOI) | https://doi.org/10.1007/s11064-010-0255-7 |
Web Address (URL) | https://link.springer.com/article/10.1007/s11064-010-0255-7 |
Abstract | Tyrosine hydroxylase (TH), the rate-limiting enzyme in catecholamine biosynthesis, is regulated acutely by protein phosphorylation and chronically by protein synthesis. No studies have systematically investigated the phosphorylation of these sites in vivo in response to stressors. We specifically investigated the phosphorylation of TH occurring within the first 24 h in response to the social defeat stress in the rat adrenal, the locus coeruleus, substantia nigra and ventral tegmental area. Five groups were investigated; home cage control (HCC), two groups that underwent social defeat (SD+) which were sacrificed either 10 min or 24 h after the end of the protocol and two groups that were put into the cage without the resident being present (SD-) which were sacrificed at time points identical to the SD+. We found at 10 min there were significant increases in serine 40 and 31 phosphorylation levels in the locus coeruleus in SD+ compared to HCC and increases in serine 40 phosphorylation levels in the substantia nigra in SD+ compared to SD-. We found at 24 h there were significant increases in serine 19 phosphorylation levels in the ventral tegmental area in SD+ compared to HCC and decreases in serine 40 phosphorylation levels in the adrenal in SD+ compared to SD-. These findings suggest that the regulation of TH phosphorylation in different catecholamine-producing cells varies considerably and is dependent on both the nature of the stressor and the time at which the response is analysed. |
Keywords | Stress; Tyrosine hydroxylase; Serine residues; Locus coeruleus; Substantia nigra; Ventral tegmental area |
Public Notes | There are no files associated with this item. |
Byline Affiliations | University of Newcastle |
University of South Australia |
https://research.usq.edu.au/item/y82qz/the-effect-of-social-defeat-on-tyrosine-hydroxylase-phosphorylation-in-the-rat-brain-and-adrenal-gland
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