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Stroke Dysbiosis index (SDI) predicts stroke severity and early outcome.(Validation)

ABSTRACT: Clinical experiment: gut microbiota pattern in stroke patients (stroke dysbiosis index, SDI) was an independent predictor for early outcome of ischemic stroke patients

PROVIDER: PRJEB31562 | ENA |

REPOSITORIES: ENA

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Stroke Dysbiosis index (SDI) predicts stroke severity and early outcome.(Training)

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Coagulopathy signature precedes and predicts severity of end-organ heat stroke pathology in a mouse model

Project description:Heat stroke is a life-threatening condition characterized by loss of thermoregulation and severe elevation of core body temperature, which can cause organ failure and damage to the central nervous system. While no definitive test exists to measure heat stroke severity, immune challenge is known to increase heat stroke risk, although the mechanism of this increased risk is unclear. In this study, we used a mouse model of classic heat stroke to test the effect of immune challenge on pathology. Employing multivariate supervised machine learning to identify patterns of molecular and cellular markers associated with heat stroke, we found that prior viral infection simulated with poly I:C injection resulted in heat stroke presenting with high levels of factors indicating coagulopathy. Despite a decreased number of platelets in the blood, platelets are large and non-uniform in size, suggesting younger, more active platelets. Levels of D-dimer and soluble thrombomodulin were increased in more severe heat stroke, and in cases presenting with the highest level of organ damage markers D-dimer levels dropped, indicating potential fibrinolysis-resistant thrombosis. Genes corresponding to immune response, coagulation, hypoxia, and vessel repair were up-regulated in kidneys of heat-challenged animals, and these increases correlated with both viral treatment and distal organ damage while appearing before discernible tissue damage to the kidney itself. We conclude that heat stroke-induced coagulopathy may be a driving mechanistic force in heat stroke pathology, especially when exacerbated by prior infection, and that coagulation markers may serve as an accessible biomarker for heat stroke severity and therapeutic strategies.

2020-05-15 | GSE129188 | GEO

Gene expression in brain following stroke

Project description:We have used microarrays to investigate the changes in gene expression at various times after stroke. Our findings reported that gene expression screening can detect known and unknown transcriptional features of stroke. Brain samples were obtained from 9 patients who died from stroke, with the approval of the local Ethics Committee. The patients were aged between 51 and 86 years and had survived between 2-37 days following stroke. Tissue samples were taken from infarct and peri-infarcted zones while controls were obtained from the contralateral hemisphere. We established mRNA expression profiles of the damaged brain tissues between 2 to 6 days, 9 to 20 days, and 26 to 37 days after stroke. RNA from three stroke patients was pooled for each patient survival group.

2010-06-25 | E-GEOD-9391 | biostudies-arrayexpress

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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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