Localization and Expression of Sirtuins 1, 2, 6 and Plasticity- Related Proteins in the Recovery Period after a Photothrombotic Stroke in Mice

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Demyanenko , S , Gantsgorn , E , Rodkin , S & Sharifulina , S 2020 , ' Localization and Expression of Sirtuins 1, 2, 6 and Plasticity- Related Proteins in the Recovery Period after a Photothrombotic Stroke in Mice ' , Journal of Stroke & Cerebrovascular Diseases , vol. 29 , no. 10 , 105152 . https://doi.org/10.1016/j.jstrokecerebrovasdis.2020.105152

Title: Localization and Expression of Sirtuins 1, 2, 6 and Plasticity- Related Proteins in the Recovery Period after a Photothrombotic Stroke in Mice
Author: Demyanenko, Svetlana; Gantsgorn, Elena; Rodkin, Stanislav; Sharifulina, Svetlana
Contributor: University of Helsinki, Neuroscience Center
Date: 2020-10
Language: eng
Number of pages: 13
Belongs to series: Journal of Stroke & Cerebrovascular Diseases
ISSN: 1052-3057
URI: http://hdl.handle.net/10138/332692
Abstract: Sirtuins, class III histone deacetylases, are involved in the regulation of tissue repair processes and brain functions after a stroke. The ability of some isoforms of sirtuins to circulate between the nucleus and cytoplasm may have various pathophysiological effects on the cells. In present work, we focused on the role of non-mitochondrial sirtuins SIRT1, SIRT2, and SIRT6 in the restoration of brain cells following ischemic stroke. Here, using a photothrombotic stroke (PTS) model in mice, we studied whether local stroke affects the level and intracellular localization of SIRT1, SIRT2, and SIRT6 in neurons and astrocytes of the intact cerebral cortex adjacent to the ischemic ipsilateral hemisphere and in the analogous region of the contralateral hemisphere at different time points during the recovery period after a stroke. We evaluated the co-localization of sirtuins with growth-associated protein-43 (GAP 43), the presynaptic marker synaptophysin (SYN) and acetylated a-tubulin (Aca-Tub), that are associated with brain plasticity and are known to be involved in brain repair after a stroke. The results show that during the recovery period, an increase in SIRT1 and SIRT2 levels occurred. The increase of SIRT1 level was associated with an increase in synaptic plasticity proteins, whereas the increase of SIRT2 level was associated with an acetylated of a-tubulin, that can reduce the mobility of neurites. SIRT6 co-localized with GAP-43, but not with SYN. Moreover, we showed that SIRT1, SIRT2, and SIRT6 are not involved in the PTS-induced apoptosis of pen umbra cells. Taken together, our results suggest that sirtuins functions differ depending on cell type, intracellular localization, specificity of sirtuins isoforms to different substrates and nature of post-translational modifications of enzymes.
Subject: Histone deacetylases
Sirtuins
Stroke
Brain regeneration
GAP-43
Synaptophysin
Tubulin acetylation
FOCAL CEREBRAL-ISCHEMIA
HISTONE DEACETYLASE
NEURITE OUTGROWTH
PREMOTOR CORTEX
BRAIN
SIRT2
SYNAPTOPHYSIN
STRESS
DAMAGE
3112 Neurosciences
3124 Neurology and psychiatry
3121 General medicine, internal medicine and other clinical medicine
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