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Cerebral hypoperfusion exacerbates traumatic brain injury in male mice

ABSTRACT: Cerebral hypoperfusion exacerbates traumatic brain injury in male mice

PROVIDER: PRJNA1009119 | ENA |

REPOSITORIES: ENA

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Cerebral hypoperfusion exacerbates traumatic brain injury in male mice

Project description:Traumatic brain injury (TBI) has been postulated to initiate a disease process that interacts with vascular dysfunction. However, the combined effects of preexisting cerebral hypoperfusion and TBI remain poorly explored. This study aimed to investigate the combined effects of bilateral carotid artery stenosis (BCAS) and mild-moderate TBI on cerebral blood flow (CBF), cognitive function, histology, and transcriptomics in Swiss-Webster mice. Male and female mice underwent BCAS using steel microcoils around the carotid arteries, followed by TBI 30 days post coil implantation. CBF, spatial learning and memory, axonal damage, and gene expression profiles were assessed. BCAS led to a ~10% reduction in CBF, while TBI caused a similar decrease. However, mice exposed to both BCAS and TBI exhibited more pronounced reductions in CBF, associated with marked spatial learning and memory deficits, particularly in males. Axonal damage in male mice was also exacerbated by the combination of BCAS and TBI. Notably, females demonstrated differential vascular and cognitive responses to BCAS and TBI, suggesting sex-specific protective mechanisms. Single nuclei RNA sequencing revealed unique, cell type-specific gene expression alterations due to BCAS, TBI, or the combination. Moreover, BCAS and TBI induced significant gene expression changes in various cell types, hinting at complex cellular interactions following vascular challenges and trauma. The cellular and molecular interplay between hypoperfusion and TBI points to intricate vascular-neuronal interactions and potential avenues for targeted interventions.

2024-08-14 | GSE241690 | GEO

RNAseq of mouse corpus callosum from WT or TRPA1-KO animals under chronic cerebral hypoperfusion

Project description:Chronic cerebral hypoperfusion is manifested in various CNS diseases accompanied by cognitive impairment, such as dementia, however the precise mechanism of chronic cerebral hypoperfusion-induced cognitive impairment remains unknown. Recently, transient receptor potential ankyrin 1 (TRPA1), activated by oxidative stress, was reported to be involved in the cerebrovascular diseases, therefore we investigated the pathophysiological role of TRPA1 in chronic cerebral hypoperfusion using a mouse bilateral common carotid artery stenosis (BCAS) model. Early cognitive impairment and white matter injury was induced by BCAS in TRPA1-knockout (TRPA1-KO) but not wild-type (WT) mice. For further investigation into the involvement of TRPA1 in chronic cerebral hypoperfusion, we conducted RNA sequence (RNAseq) in the corpus callosum from sham- and BCAS-operated WT and TRPA1-KO mice.

2023-08-08 | GSE201513 | GEO

Cortex-specific transcriptome profiling after deeper cerebral hypoperfusion in mice

Project description:Little is understood about the underlying cellular and molecular mechanisms related to cerebral cortex damage and glial activation after severe cerebral hypoperfusion.Efforts to explore the relationship between neuropathological and gene expression changes support a role for identifying novel molecular pathways by transcriptomic mechanisms. To investigate cortex-specific transcriptome profiling after severe cerebral hypoperfusion in mice

2023-03-09 | GSE210666 | GEO

Meningeal lymphatic dysfunction exacerbates traumatic brain injury pathogenesis

Project description:Meningeal lymphatic dysfunction exacerbates traumatic brain injury pathogenesis

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Hippocampus-specific transcriptome profiling after severe cerebral hypoperfusion in mice

Project description:Little is understood about the underlying cellular and molecular mechanisms related to hippocampus damage and glial activation after severe cerebral hypoperfusion.Efforts to explore the relationship between neuropathological and gene expression changes support a role for identifying novel molecular pathways by transcriptomic mechanisms. To investigate hippocampus-specific transcriptome profiling after severe cerebral hypoperfusion in mice

2023-07-26 | GSE223580 | GEO

Cortex-specific epigenetic profiling of chromatin accessibility after deeper cerebral hypoperfusion in mice

Project description:Efforts to understand genetic variability involved in cortex damage and glial activation support a role for upstream regulation by epigenetic mechanisms. To investigate cortex-specific epigenetic profiling after severe cerebral hypoperfusion in mice

2023-10-17 | GSE215893 | GEO

Comprehensive analysis of circRNA expression profiles in rat cerebral cortex after moderate traumatic brain injury

Project description:Background: Traumatic brain injury is a medical event of global concern, and a growing body of research suggests that circular RNA can play very important roles in traumatic brain injury. To explore the functions of more novel and valuable circular RNA in traumatic brain injury response, a moderate traumatic brain injury in rat was established and a comprehensive analysis of circular RNA expression profiles in rat cerebral cortex was done. Results: As a result, 301 up-regulated and 284 down-regulated circular RNAs were obtained in moderate traumatic brain injury rats, the Gene Ontology and Kyoto Encyclopedia of Genes and Genomes enrichment analysis were performed based on the circular RNA’s host genes, and a circRNA-miRNA interaction network based on differentially expressed circular RNAs was constructed. Also, four circular RNAs were validated by RT-qPCR and sanger sequencing. Conclusion: This study showed that differentially expressed circular RNAs existed between rat cerebral cortex after moderate traumatic brain injury and control. And this will provide valuable information for circular RNA research in the field of traumatic brain injury.

2022-01-15 | GSE193521 | GEO

Hippocampus miRNA profiles in chronic cerebral-hypoperfusion rats

Project description:Hippocampus miRNA profiles in chronic cerebral-hypoperfusion rats

| PRJNA595889 | ENA

Gene expression profile at single cell level of microglia sorted from rats brain with chronic cerebral hypoperfusion

Project description:Microglia are considered as a heterogenous population in the brain tissues. We used single-cell RNA sequencing (scRNA-seq) to analyze the diversity of microglia in the rats with chronic cerebral hypoperfusion.

2024-08-26 | GSE234247 | GEO

Transcription profiling of rat model of nonischemic cerebral hypoperfusion to investigate molecular mechanisms of early response in adaptive cerebral arteriogenesis

Project description:This study aims at a comprehensive understanding of the genomic program activated during early-phase of collateral vessel growth in a rat model for cerebral adaptive arteriogenesis (3-VO). While arteriogenesis constitutes a promising therapeutic concept for cerebrovascular ischemia, genomic profiles essential for therapeutic target identification were analysed solely for collateral arteries of the heart and periphery. Despite challenging anatomical conditions of the brain the 3-VO model allows identification of differentially expressed genes during adaptive cerebral arteriogenesis by selective removal of the posterior cerebral artery (PCA). Experiment Overall Design: Using an established rat model of nonischemic cerebral hypoperfusion (3-VO) (Busch, Buschmann; 2003), RNA was extracted from isolated ipsilateral PCA. Pooled RNAs from groups of intact (0h), sham and 3-VO animals 24h and 3 days after surgery, were hybridised repeatedly for an extensive genome screen of 15866 genes applying standardized Affymetrix technology. For each Array total RNA from 8 animals was processed, pooled and hybridized to a Rat230A GeneChip per group. These groups were classified as follows: intact control (N=3), 24h3VO (N=3); 24h sham (N=3), 3days3VO (N=3); and 3days sham(N=3). Hybridization, washing, antibody amplification, staining, and scanning of probe arrays were performed according to the Affymetrix Technical Manual. Probe arrays were scanned using the GeneChip System (Hewlett-Packard, Santa Cruz, CA)(Affymetrix) and raw data were processed using GCOS and normalized to a global intensity of 500.

2008-10-25 | E-GEOD-6189 | biostudies-arrayexpress

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