Chronic stress exposure following photothrombotic stroke is associated with increased levels of Amyloid beta accumulation and altered oligomerisation at sites of thalamic secondary neurodegeneration in mice

Article


Ong, Lin Kooi, Zhao, Zidan, Kluge, Murielle, Walker, Frederick R. and Nilsson, Michael. 2017. "Chronic stress exposure following photothrombotic stroke is associated with increased levels of Amyloid beta accumulation and altered oligomerisation at sites of thalamic secondary neurodegeneration in mice." Journal of Cerebral Blood Flow and Metabolism. 37 (4), pp. 1338-1348. https://doi.org/10.1177/0271678X16654920
Article Title

Chronic stress exposure following photothrombotic stroke is associated with increased levels of Amyloid beta accumulation and altered oligomerisation at sites of thalamic secondary neurodegeneration in mice

ERA Journal ID16327
Article CategoryArticle
AuthorsOng, Lin Kooi, Zhao, Zidan, Kluge, Murielle, Walker, Frederick R. and Nilsson, Michael
Journal TitleJournal of Cerebral Blood Flow and Metabolism
Journal Citation37 (4), pp. 1338-1348
Number of Pages11
YearApr 2017
Place of PublicationUnited States
ISSN0271-678X
1559-7016
Digital Object Identifier (DOI)https://doi.org/10.1177/0271678X16654920
Web Address (URL)https://journals.sagepub.com/doi/10.1177/0271678X16654920
Abstract

Exposure to severe stress following stroke is recognised to complicate the recovery process. We have identified that stress can exacerbate the severity of post-stroke secondary neurodegeneration in the thalamus. In this study, we investigated whether exposure to stress could influence the accumulation of the neurotoxic protein Amyloid-b. Using an experimental model of focal cortical ischemia in adult mice combined with exposure to chronic restraint stress, we examined changes within the contra-and ipsilateral thalamus at six weeks post-stroke using Western blotting and immunohistochemical approaches. Western blotting analysis indicated that stroke was associated with a significant enhancement of the 25 and 50 kDa oligomers within the ipsilateral hemisphere and the 20 kDa oligomer within the contralateral hemisphere. Stroked animals exposed to stress exhibited an additional increase in multiple forms of Amyloid-beta oligomers. Immunohistochemistry analysis confirmed that stroke was associated with a significant accumulation of Amyloid-beta within the thalami of both hemispheres, an effect that was exacerbated in stroke animals exposed to stress. Given that Amyloid-beta oligomers, most notably the 30-40 and 50 kDa oligomers, are recognised to correlate with accelerated cognitive decline, our results suggest that monitoring stress levels in patients recovering from stroke may merit consideration in the future.

KeywordsAmyloid beta; chronic stress; post-stroke; secondary neurodegeneration; thalamus
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Byline AffiliationsUniversity of Newcastle
Hunter Medical Research Institute, Australia
NHMRC Centre of Research Excellence Stroke Rehabilitation and Brain Recovery, Australia
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https://research.usq.edu.au/item/y830w/chronic-stress-exposure-following-photothrombotic-stroke-is-associated-with-increased-levels-of-amyloid-beta-accumulation-and-altered-oligomerisation-at-sites-of-thalamic-secondary-neurodegeneration

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Ong, Lin Kooi, Guan, Liying, Damanhuri, Hanafi, Goodchild, Ann K., Bobrovskaya, Larisa, Dickson, Phillip W. and Dunkley, Peter R.. 2014. "Neurobiological consequences of acute footshock stress: effects on tyrosine hydroxylase phosphorylation and activation in the rat brain and adrenal medulla." Journal of Neurochemistry. 128 (4), pp. 547-560. https://doi.org/10.1111/jnc.12482
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
Bobrovskaya, Larisa, Maniam, Jayanthi, Ong, Lin Kooi, Dunkley, Peter R. and Morris, Margaret J.. 2013. "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." Neurochemical Research. 38 (4), pp. 826-833. https://doi.org/10.1007/s11064-013-0985-4
Functional Programming of the Autonomic Nervous System by Early Life Immune Exposure: Implications for Anxiety
Sominsky, Luba, Fuller, Erin A., Bondarenko, Evgeny, Ong, Lin Kooi, Averell, Lee, Nalivaiko, Eugene, Dunkley, Peter R., Dickson, Phillip W. and Hodgson, Deborah M.. 2013. "Functional Programming of the Autonomic Nervous System by Early Life Immune Exposure: Implications for Anxiety." PLoS One. 8 (3), pp. 1-13. https://doi.org/10.1371/journal.pone.0057700
Tyrosine Hydroxylase Phosphorylation in Catecholaminergic Brain Regions: A Marker of Activation following Acute Hypotension and Glucoprivation
Damanhuri, Hanafi A., Burke, Peter G. R., Ong, Lin K., Bobrovskaya, Larisa, Dickson, Phillip W., Dunkley, Peter R. and Goodchild, Ann K.. 2012. "Tyrosine Hydroxylase Phosphorylation in Catecholaminergic Brain Regions: A Marker of Activation following Acute Hypotension and Glucoprivation." PLoS One. 7 (11), pp. 1-19. https://doi.org/10.1371/journal.pone.0050535
The Sustained Phase of Tyrosine Hydroxylase Activation In vivo
Ong, Lin Kooi, Sominsky, Luba, Dickson, Phillip W., Hodgson, Deborah M. and Dunkley, Peter R.. 2012. "The Sustained Phase of Tyrosine Hydroxylase Activation In vivo." Neurochemical Research. 37 (9), pp. 1938-1943. https://doi.org/10.1007/s11064-012-0812-3
Increased microglial activation in the rat brain following neonatal exposure to a bacterial mimetic
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