Project description:Metabolic dysfunction is considered a key event after ischemic stroke. However, the underlying mechanisms of metabolic disorders in cerebral ischemia is unknown. Circular RNA SCMH1 (circSCMH1), a circular RNA that has been reported to function in brain repair after stroke, was confirmed to be involved in metabolic disorders. circSCMH1 was delivered by rabies virus glycoprotein (RVG)-modified sxtracellular vesicle. Mechanistically, circSCMH1 decreased kynurenine 3-monooxygenase (KMO) expression, a key enzyme in kynurenine metabolism. Our findings suggested that circSCMH1 inhibited KMO expression, providing insight into the mechanism by which circSCMH1 promotes stroke recovery.
Project description:We investigated the functional recovery of in ischemic stroke by Photothrombotic stroke (PT) model. RNA-Seq of the peri-infarct cortex at 28 day after PT to clarify the potential mechanisms of pushen capsule against ischemic stroke. Pushen (drug approval number: Z20040074; batch number: 20082403; Suzhong pharma) was dissolved in the vehicle of ultrapure water, and it was administered by oral gavage at 24 hours after surgery continuously for 28 days. Mice in the Sham and Vehicle group were administered with a vehicle of ultrapure water equal to the Pushen group. By applying the cutoffs of P <0.05 and |log2 (fold change)|>1, 2369 differentially expressed genes (DEGs) were identified between sham vs PT, and 231 differentially expressed genes (DEGs) were identified between PT vs Pushen.
Project description:Stroke is a prevalent disorder representing the third leading cause of death and major cause of disability. Post-stroke epilepsy (PSE) has been recognized as a common clinical issue after stroke, accounting for 30-40% of the causes of epilepsy among older adults. In this study, we determined GABAA receptor-mediated seizure susceptibility after PT cerebral stroke in aged mice. Young adult mice around 10 weeks of age are widely used in stroke experiments. However, as most strokes are diagnosed in the elderly and PSE has been recognized as a common clinical incidence after stroke, we utilized photothrombosis (PT) model of cerebral ischemia and examined seizure susceptibility and brain injury using combined behavioral (video) and EEG monitoring and histological (MRI) assessments. To investigate GABAA receptor-mediated convulsive/non-convulsive seizures, lower-doses of pentylenetetrazol (PTZ) was injected. PTZ susceptibility in aging mice increased compared to young adults. One month after PT stroke, aged PT stroke mice exhibited severe convulsive seizures (late-onset). These findings exhibited the increase of GABAA receptor-mediated seizures susceptibility in PT stroke aging mice, but not in young adults.
Project description:The transcriptomes of focal region in C57BL/6 mice after photothrombotic internal ischemia stroke generated by RNA-sequencing, using Illumina
Project description:The transcriptomes of focal region in C57BL/6 mice after photothrombotic cerebral ischemia stroke generated by RNA-sequencing, using Illumina
Project description:Current study aims to study the gene expression change after photothrombotic strokes, and the potential beneficial effects of whole-body X-ray irradiation on stroke mice
Project description:Stroke is a prevalent disorder representing the third leading cause of death and major cause of disability. Post-stroke epilepsy (PSE) has been recognized as a common clinical issue after stroke, accounting for 30-40% of the causes of epilepsy among older adults. In this study, we determined GABAA receptor-mediated seizure susceptibility after PT cerebral stroke in aged mice. Young adult mice around 10 weeks of age are widely used in stroke experiments. However, as most strokes are diagnosed in the elderly and PSE has been recognized as a common clinical incidence after stroke, we utilized photothrombosis (PT) model of cerebral ischemia and examined seizure susceptibility. To investigate in vitro drug-induced seizure susceptibility (E/I imbalance) of GABAA receptor antagonist, gabazine (GZ), voltage-sensitive dye (VSD) imaging techniques were used in hippocampal brain slices. One month after PT stroke, in vivo aged PT stroke mice exhibited severe convulsive seizures (late-onset). in vitro GZ-induced E/I imbalance in hippocampus of aging mice increased compared to young adults. In addition, Anti-seizure medication (levetiracetam) normalized in vitro GZ-induced E/I imbalance in hippocampus of aging mice. These findings exhibited that GABAA receptor-mediated seizures susceptibility (E/I imbalance) in hippocampus after cortical PT stroke in aging mice, but not in young adults.