Peripheral inflammation induces long-term changes in tyrosine hydroxylase activation in the substantia nigra

Article

Ong, Lin Kooi, Briggs, Gabrielle D., Guan, Liying, Dunkley, Peter R. and Dickson, Phillip W.. 2021. "Peripheral inflammation induces long-term changes in tyrosine hydroxylase activation in the substantia nigra." Neurochemistry International: the journal for the publication of cellular and molecular aspects of neurochemistry. 146, pp. 1-10. https://doi.org/10.1016/j.neuint.2021.105022
Article Title

Peripheral inflammation induces long-term changes in tyrosine hydroxylase activation in the substantia nigra

ERA Journal ID14490
Article CategoryArticle
AuthorsOng, Lin Kooi (Author), Briggs, Gabrielle D. (Author), Guan, Liying (Author), Dunkley, Peter R. (Author) and Dickson, Phillip W. (Author)
Journal TitleNeurochemistry International: the journal for the publication of cellular and molecular aspects of neurochemistry
Journal Citation146, pp. 1-10
Article Number105022
Number of Pages10
Year2021
Place of PublicationUnited Kingdom
ISSN0197-0186
1872-9754
Digital Object Identifier (DOI)https://doi.org/10.1016/j.neuint.2021.105022
Web Address (URL)https://www.sciencedirect.com/science/article/pii/S0197018621000681
Abstract

Inflammation plays a role in neuropathology. We hypothesised that inflammation, induced by a single intraperitoneal injection of lipopolysaccharide (LPS), would induce long-term changes in the regulation of tyrosine hydroxylase (TH) in the rat midbrain. The level of 12 cytokines was initially analysed from one day to six months after LPS injection to confirm that peripheral inflammation led to neuroinflammatory changes in the midbrain. In the substantia nigra (SN), the levels of 8 of the 12 measured cytokines was significantly increased at one day. Granulocyte-macrophage colony-stimulating factor showed a threefold increased level at 6 months. The ventral tegmental area (VTA) showed a completely different pattern, with no increases in the levels of the 12 cytokines at one day and no changes beyond one week. TH activity was determined using a tritiated water release assay, TH protein and phosphorylation levels (Ser19, Ser31 and Ser40) were determined using western blotting. TH-specific activity in the SN was unchanged at one day but was substantially increased at one week and one month with no concomitant increase in TH phosphorylation. Substantial changes in TH activation without changes in TH phosphorylation have not previously been observed in the brain in response to a range of stressors. TH-specific activity was increased in the SN, and in the caudate putamen, at 6 months and was associated with increased TH phosphorylation at Ser19 and Ser40 at both locations. TH-specific activity in the VTA showed only a transient increase at day one associated with increased phosphorylation at Ser19 and Ser31 but thereafter showed no changes. This study shows that inflammation induced by LPS generated two distinct long-term changes in TH activity in the SN that are caused by different mechanisms, but there were no long-term changes in the adjacent VTA.

KeywordsActivity; Inflammation; Lipopolysaccharide; Phosphorylation; Substantia nigra; Tyrosine hydroxylase
ANZSRC Field of Research 2020320499. Immunology not elsewhere classified
320506. Medical biochemistry - proteins and peptides (incl. medical proteomics)
320902. Cellular nervous system
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Byline AffiliationsUniversity of Newcastle
Institution of OriginUniversity of Southern Queensland
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Sominsky, L., Walker, A. K., Ong, L. K., Tynan, R. J., Walker, F. R. and Hodgson, D. M.. 2012. "Increased microglial activation in the rat brain following neonatal exposure to a bacterial mimetic." Behavioural Brain Research. 226 (1), pp. 351-356. https://doi.org/10.1016/j.bbr.2011.08.038
The effects of footshock and immobilization stress on tyrosine hydroxylase phosphorylation in the rat locus coeruleus and adrenal gland
Ong, L. K., Guan, L., Stutz, B., Dickson, P. W., Dunkley, P. R. and Bobrovskaya, L.. 2011. "The effects of footshock and immobilization stress on tyrosine hydroxylase phosphorylation in the rat locus coeruleus and adrenal gland." Neuroscience. 192, pp. 20-27. https://doi.org/10.1016/j.neuroscience.2011.06.087
Epigenetic Inheritance of Anxiety-Like Behaviour in Rats - Role of Early Life Exposure to a Bacterial Mimetic
Sominsky, L., Walker, A. K., Ong, L., Tynan, R. J., Walker, F. R. and Hodgson, D. M.. 2011. "Epigenetic Inheritance of Anxiety-Like Behaviour in Rats - Role of Early Life Exposure to a Bacterial Mimetic." Journal of Developmental Origins of Health and Disease. 2, pp. S109-S109.
Neonatal respiratory infection and adult re-infection: Effect on glucocorticoid and mineralocorticoid receptors in the hippocampus in BALB/c mice
Wynne, O., Horvat, J. C., Kim, R. Y., Ong, L. K., Smith, R., Hansbro, P. M., Clifton, V. L. and Hodgson, D. M.. 2011. "Neonatal respiratory infection and adult re-infection: Effect on glucocorticoid and mineralocorticoid receptors in the hippocampus in BALB/c mice." Brain, Behavior, and Immunity. 25 (6), pp. 1214-1222. https://doi.org/10.1016/j.bbi.2011.03.014
Sustained Phosphorylation of Tyrosine Hydroxylase at Serine 40 in VIVO
Ong, L. K., Sominsky, L., Walker, A. K., Hodgson, D. M., Goodchild, A. K., Bobrovskaya, L., Dickson, P. W. and Dunkley, P. R.. 2011. "Sustained Phosphorylation of Tyrosine Hydroxylase at Serine 40 in VIVO." 23rd Biennial Meeting of the International Society for Neurochemistry (2011). Athen, Greece 28 Aug - 01 Sep 2011 United Kingdom.
The Effect of Social Defeat on Tyrosine Hydroxylase Phosphorylation in the Rat Brain and Adrenal Gland
Ong, Lin Kooi, Bobrovskaya, Larisa, Walker, Frederick R., Day, Trevor A., Dickson, Phillip W. and Dunkley, Peter R.. 2011. "The Effect of Social Defeat on Tyrosine Hydroxylase Phosphorylation in the Rat Brain and Adrenal Gland." Neurochemical Research. 36 (1), pp. 27-33. https://doi.org/10.1007/s11064-010-0255-7
Tyrosine hydroxylase phosphorylation in response to footshock and restraint stress
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