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Differentially expressed lncRNAs profile between ischemic stroke patients and non-stroke patients in South China

ABSTRACT: Differentially expressed lncRNAs profile between ischemic stroke patients and non-stroke patients in South China

PROVIDER: PRJNA816528 | ENA |

REPOSITORIES: ENA

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Differentially expressed lncRNAs profile between ischemic stroke patients and non-stroke patients in South China

Project description:To evaluate lncRNA expression and changes in whole blood samples of patients during the acute cerebral ischemia phase, we have employed whole genome microarray expression profiling as a discovery platform to identify dysregulated genes to put forth predicted connections and functions of the differentially expressed lncRNAs.There were 1123 differentially expressed lncRNAs (Fold change ≥2.0, p<0.05) between stroke patients and the control group. Among these, 371 lncRNAs were upregulated, and 752 lncRNAs were downregulated. Expression of nine lncRNAs (ENST00000452599, ENST00000527450, ENST00000608826, T013651, T029143, T131416, T294865, ENST00000530525 and T058035) from this signature was quantified in the same RNA samples by real-time PCR, confirming our gene chip performance.

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Project description:Our study reveals that ischemic stroke can influence the expression of LncRNAs and mRNAs in the peripheral blood at both the acute and subacute stages

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Gene expression analysis of peripheral whole blood RNA following ischemic stroke

Project description:The purpose of this project was to elucidate gene expression in the peripheral whole blood of acute ischemic stroke patients to identify a panel of genes for the diagnosis of acute ischemic stroke. Peripheral blood samples were collected in Paxgene Blood RNA tubes from stroke patients who were >18 years of age with MRI diagnosed ischemic stroke and controls who were non-stroke neurologically healthy. The results suggest a panel of genes can be used to diagnose ischemic stroke, and provide information about the biological pathways involved in the response to acute ischemic stroke in humans. Total RNA extracted from whole blood in n=39 ischemic stroke patients compared to n=24 healthy control subjects.

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Project description:Genome wide DNA methylation profiling of normal and ischemic stroke patients blood samples. The Illumina Infinium 850k Human DNA methylation Beadchip was used to obtain DNA methylation profiles across approximately 850,000 CpGs in liquid. Samples included 3 healthy people blood samples, 3 ischemic stroke patients blood samples.

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Project description:We performed a genome-wide methylation study in whole-blood DNA from 404 ischemic stroke patient cohort, distributed across 3 ischemic stroke subtypes: Large-artery atherosclerosis (n=132), Small-artery disease (n=141) and Cardio embolic (n=127) . Illumina HumanMethylation450 BeadChip array was used to measure DNA methylation in CpG sites. We performed a genome-wide methylation study in whole-blood DNA from 185 ischemic stroke patient cohort. Illumina HumanMethylation450 BeadChip array was used to measure DNA methylation in CpG sites.

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The role of microglial lnc-U90926 in ischemic stroke

Project description:Dysregulated long non-coding RNAs (lncRNAs) have been shown to contribute to the pathogenesis of ischemic stroke. However, the potential role of lncRNAs in post-stroke microglial reactivation remains largely unknown. Here, we uncovered that lncRNA-U90926 was significantly increased in the microglia exposed to ischemia/reperfusion in vivo and in vitro. In addition, adenovirus associated virus (AAV)-mediated microglial U90926 silencing alleviated neurological deficits and reduced infarct volume in experimental stroke mice. Microglial U90926 knockdown could reduce the infiltration of neutrophils into ischemic lesion site, which might be attributed to the downregulation of C-X-C motif ligand 2 (CXCL2). Mechanistically, U90926 directly bound to malate dehydrogenase (MDH2) and competitively inhibited MDH2-mediated decay of CXCL2 mRNA. Taken together, our study demonstrated that microglial U90926 aggravated ischemic brain injury via facilitating neutrophil infiltration, suggesting that U90926 might be a potential biomarker and therapeutic target for ischemic stroke.

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