More than motor impairment: A spatiotemporal analysis of cognitive impairment and associated neuropathological changes following cortical photothrombotic stroke

Article

Sanchez-Bezanilla, Sonia, Hood, Rebecca J., Collins-Praino, Lyndsey E., Turner, Renee J., Walker, Frederick R., Nilsson, Michael and Ong, Lin Kooi. 2021. "More than motor impairment: A spatiotemporal analysis of cognitive impairment and associated neuropathological changes following cortical photothrombotic stroke." Journal of Cerebral Blood Flow and Metabolism. 41 (9), pp. 2439-2455. https://doi.org/10.1177/0271678X211005877
Article Title

More than motor impairment: A spatiotemporal analysis of cognitive impairment and associated neuropathological changes following cortical photothrombotic stroke

ERA Journal ID16327
Article CategoryArticle
AuthorsSanchez-Bezanilla, Sonia (Author), Hood, Rebecca J. (Author), Collins-Praino, Lyndsey E. (Author), Turner, Renee J. (Author), Walker, Frederick R. (Author), Nilsson, Michael (Author) and Ong, Lin Kooi (Author)
Journal TitleJournal of Cerebral Blood Flow and Metabolism
Journal Citation41 (9), pp. 2439-2455
Number of Pages17
Year2021
Place of PublicationUnited Kingdom
ISSN0271-678X
1559-7016
Digital Object Identifier (DOI)https://doi.org/10.1177/0271678X211005877
Web Address (URL)https://journals.sagepub.com/doi/10.1177/0271678X211005877
Abstract

There is emerging evidence suggesting that a cortical stroke can cause delayed and remote hippocampal dysregulation, leading to cognitive impairment. In this study, we aimed to investigate motor and cognitive outcomes after experimental stroke, and their association with secondary neurodegenerative processes. Specifically, we used a photothrombotic stroke model targeting the motor and somatosensory cortices of mice. Motor function was assessed using the cylinder and grid walk tasks. Changes in cognition were assessed using a mouse touchscreen platform. Neuronal loss, gliosis and amyloid-β accumulation were investigated in the peri-infarct and ipsilateral hippocampal regions at 7, 28 and 84 days post-stroke. Our findings showed persistent impairment in cognitive function post-stroke, whilst there was a modest spontaneous motor recovery over the investigated period of 84 days. In the peri-infarct region, we detected a reduction in neuronal loss and decreased neuroinflammation over time post-stroke, which potentially explains the spontaneous motor recovery. Conversely, we observed persistent neuronal loss together with concomitant increased neuroinflammation and amyloid-β accumulation in the hippocampus, which likely accounts for the persistent cognitive dysfunction. Our findings indicate that cortical stroke induces secondary neurodegenerative processes in the hippocampus, a region remote from the primary infarct, potentially contributing to the progression of post-stroke cognitive impairment.

Keywordsamyloid-β; Cognitive impairment; neuroinflammation; secondary neurodegeneration; stroke
ANZSRC Field of Research 2020320905. Neurology and neuromuscular diseases
320902. Cellular nervous system
520401. Cognition
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Byline AffiliationsUniversity of Newcastle
University of Adelaide
Institution of OriginUniversity of Southern Queensland
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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