Peripheral Lipopolysaccharide Challenge Induces Long-Term Changes in Tyrosine Hydroxylase Regulation in the Adrenal Medulla

Article


Ong, Lin Kooi, Page, Scott, Briggs, Gabrielle D., Guan, Liying, Dun, Matthew D., Verrills, Nicole M., Dunkley, Peter R. and Dickson, Phillip W.. 2017. "Peripheral Lipopolysaccharide Challenge Induces Long-Term Changes in Tyrosine Hydroxylase Regulation in the Adrenal Medulla." Journal of Cellular Biochemistry. 118 (8), pp. 2096-2107. https://doi.org/10.1002/jcb.25839
Article Title

Peripheral Lipopolysaccharide Challenge Induces Long-Term Changes in Tyrosine Hydroxylase Regulation in the Adrenal Medulla

ERA Journal ID2235
Article CategoryArticle
AuthorsOng, Lin Kooi, Page, Scott, Briggs, Gabrielle D., Guan, Liying, Dun, Matthew D., Verrills, Nicole M., Dunkley, Peter R. and Dickson, Phillip W.
Journal TitleJournal of Cellular Biochemistry
Journal Citation118 (8), pp. 2096-2107
Number of Pages12
YearAug 2017
Place of PublicationUnited States
ISSN0730-2312
1097-4644
Digital Object Identifier (DOI)https://doi.org/10.1002/jcb.25839
Web Address (URL)https://onlinelibrary.wiley.com/doi/10.1002/jcb.25839
Abstract

Immune activation can alter the activity of adrenal chromaffin cells. The effect of immune activation by lipopolysaccharide (LPS) on the regulation of tyrosine hydroxylase (TH) in the adrenal medulla in vivo was determined between 1 day and 6 months after LPS injection. The plasma levels of eleven cytokines were reduced 1 day after LPS injection, whereas the level for interleukin-10 was increased. The levels of all cytokines remained at control levels until 6 months when the levels of interleukin-6 and -4 were increased. One day after LPS injection, there was a decrease in TH-specific activity that may be due to decreased phosphorylation of serine 31 and 40. This decreased phosphorylation of serine 31 and 40 may be due to an increased activation of the protein phosphatase PP2A. One week after LPS injection, there was increased TH protein and increased phosphorylation of serine 40 that this was not accompanied by an increase in TH-specific activity. All TH parameters measured returned to basal levels between 1 month and 3 months. Six months after injection there was an increase in TH protein. This was associated with increased levels of the extracellular regulated kinase isoforms 1 and 2. This work shows that a single inflammatory event has the capacity to generate both short-term and long-term changes in TH regulation in the adrenal medulla of the adult animal.

KeywordsPeripheral inflammation; Cytokines; Tyrosine Hydroxylase; Protein kinases; Protein Phosphatase 2A; Adrenal Medulla
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Byline AffiliationsUniversity of Newcastle
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Ong, L., Guan, L., Stutz, B., Dickson, P., Dunkley, P. and Bobrovskaya, L.. 2010. "Tyrosine hydroxylase phosphorylation in response to footshock and restraint stress." Journal of Neurochemistry. 115, pp. 77-77.
Signal transduction pathways and tyrosine hydroxylase regulation in the adrenal medulla following glucoprivation: An in vivo analysis
Bobrovskaya, Larisa, Damanhuri, Hanafi A., Ong, Lin Kooi, Schneider, Jennifer J., Dickson, Phillip W., Dunkley, Peter R. and Goodchild, Ann K.. 2010. "Signal transduction pathways and tyrosine hydroxylase regulation in the adrenal medulla following glucoprivation: An in vivo analysis." Neurochemistry International: the journal for the publication of cellular and molecular aspects of neurochemistry. 57 (2), pp. 162-167. https://doi.org/10.1016/j.neuint.2010.05.009
The effect of social conflict on tyrosine hydroxylase phosphorylation in catecholamine-producing cells from sprague-dawley rats
Ong, L., Bobrovskaya, L., Walker, F., Day, Trevor, Dickson, P. and Dunkley, P.. 2009. "The effect of social conflict on tyrosine hydroxylase phosphorylation in catecholamine-producing cells from sprague-dawley rats." 22nd Biennial Meeting of the International Society for Neurochemistry & Asian Pacific Society for Neurochemistry (2009). South Korea 23 - 29 Aug 2009 United Kingdom.
Cross-neutralisation of Australian brown and tiger snake venoms with commercial antivenoms: Cross-reactivity or antivenom mixtures?
O’Leary, Margaret A., Schneider, Jennifer J., Prakash Krishnan, Brian, Lavis, Christopher, McKendry, Amy, Ong, Lin Kooi and Isbister, Geoffrey K.. 2007. "Cross-neutralisation of Australian brown and tiger snake venoms with commercial antivenoms: Cross-reactivity or antivenom mixtures?" Toxicon. 50 (2), pp. 206-213. https://doi.org/10.1016/j.toxicon.2007.03.014