Molecular profile of the rat peri-infarct region four days after stroke: Study with MANF

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Teppo , J , Vaikkinen , A , Stratoulias , V , Mätlik , K , Anttila , J E , Smolander , O-P , Pöhö , P , Harvey , B K , Kostiainen , R & Airavaara , M 2020 , ' Molecular profile of the rat peri-infarct region four days after stroke: Study with MANF ' , Experimental Neurology , vol. 329 , 113288 . https://doi.org/10.1016/j.expneurol.2020.113288

Title: Molecular profile of the rat peri-infarct region four days after stroke: Study with MANF
Author: Teppo, Jaakko; Vaikkinen, Anu; Stratoulias, Vassilis; Mätlik, Kert; Anttila, Jenni E.; Smolander, Olli-Pekka; Pöhö, Päivi; Harvey, Brandon K.; Kostiainen, Risto; Airavaara, Mikko
Other contributor: University of Helsinki, Division of Pharmaceutical Chemistry and Technology
University of Helsinki, Division of Pharmaceutical Chemistry and Technology
University of Helsinki, Neuroscience Center
University of Helsinki, Department of Pharmacology
University of Helsinki, Institute of Biotechnology
University of Helsinki, Division of Pharmaceutical Chemistry and Technology
University of Helsinki, Drug Research Program
University of Helsinki, Neuroscience Center







Date: 2020-07
Language: eng
Number of pages: 19
Belongs to series: Experimental Neurology
ISSN: 0014-4886
DOI: https://doi.org/10.1016/j.expneurol.2020.113288
URI: http://hdl.handle.net/10138/316267
Abstract: The peri-infarct region after ischemic stroke is the anatomical location for many of the endogenous recovery processes, and the molecular events in the peri-infarct region remain poorly characterized. In this study, we examine the molecular profile of the peri-infarct region on post-stroke day four, time when reparative processes are ongoing. We used a multiomics approach, involving RNA sequencing, and mass spectrometry-based proteomics and metabolomics to characterize molecular changes in the peri-infarct region. We also took advantage of our previously developed method to express transgenes in the peri-infarct region where self-complementary adeno-associated virus (AAV) vectors were injected into the brain parenchyma on post-stroke day 2. We have previously used this method to show that mesencephalic astrocyte-derived neurotrophic factor (MANF) enhances functional recovery from stroke and recruits phagocytic cells to the peri-infarct region. Here, we first analyzed the effects of stroke to the peri-infarct region on post-stroke day 4 in comparison to sham-operated animals, finding that stroke induced changes in 3345 transcripts, 341 proteins, and 88 metabolites. We found that after stroke genes related to inflammation, proliferation, apoptosis, and regeneration were upregulated, whereas genes encoding neuroactive ligand receptors and calcium-binding proteins were downregulated. In proteomics, we detected upregulation of proteins related to protein synthesis and downregulation of neuronal proteins. Metabolomic studies indicated that in after stroke tissue there is increase in saccharides, sugar phosphates, ceramides and free fatty acids and decrease of adenine, hypoxantine, adenosine and guanosine. We then compared the effects of post-stroke delivery AAV1-MANF delivery to AAV1-eGFP (enhanced green fluorescent protein). MANF administration increased the expression of 77 genes, most of which were related to immune response. In proteomics, MANF administration reduced S100A8 and S100A9 protein levels. In metabolomics, no significant differences between MANF and eGFP treatment were detected, but relative to sham surgery group, most of the changes in lipids were significant in the AAV-eGFP group only. This work describes the molecular profile of the peri-infarct region during recovery from ischemic stroke, and establishes a resource for further stroke studies. These results provide further support for parenchymal MANF as a modulator of phagocytic function.
Subject: 3112 Neurosciences
Stroke
Peri-infarct
MANF
Transcriptomics
Proteomics
Metabolomics
Multiomics
ER STRESS
ENDOPLASMIC-RETICULUM STRESS
MICE REVEALS
FOCAL ISCHEMIA
UNFOLDED PROTEIN RESPONSE
FREE FATTY-ACIDS
N-ACETYLASPARTATE
CEREBRAL-ARTERY OCCLUSION
GENE-EXPRESSION
ISCHEMIC-STROKE
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