Project description:The subventricular zone (SVZ) is a neurogenetic niche that contributes to homeostasis and repair after brain injury. However, effects of mild traumatic brain injury (mTBI) on genomewide gene expression in the SVZ remain largely unexplored. To address this issue, we investigated the single-nucleus transcriptomic profiles of the SVZ after mTBI. 18 distinct clusters were yielded via unsupervised clustering of the transcriptomic profiles. Cell type specific gene expression responding to mTBI were revealed, some of which were closely associated with pathogenesis post-injury. Furthermore, the diverse cell to cell interaction networks uncovered an array of cellular processes under mTBI. Also, we reported novel lineage trajectories and molecular hallmarks that govern the neurogenesis. Our gene expression atlas provides extensive resources for future researches regarding mTBI induced pathogenesis, its therapeutic interventions or diagnostic tests.
Project description:Here, we examined the molecular landscape of Traumatic Brain Injury by employing Visium Spatial Transcriptomics on CHIMERA TBI mice.
Project description:Primary blast-induced mild traumatic brain injury (mTBI) represents a common injury experienced during modern warfare. With virtually no apparent physical damage or symptoms presented, an effective source with minimum-invasion for mTBI biomarker discovery is required. In this study, we measure the transcriptomic sensitivity of the hair follicles in relation to the severity of primary blast-derived TBI.
Project description:Female ICR mice 6-8 weeks old and weighing 23-28 grams received a mild traumatic brain injury via weight drop model. 48 hours after trauma, the mice were sacrificed and RNA was extracted from lungs to examine what pulmonary gene expression changes may have been triggered by the brain injury using microarray analysis.
Project description:Traumatic brain injury (TBI) is an under-recognizedpublic healththreat. Even mild brain injuries can lead to long-term neurologic impairment.Microgliaplay a fundamental role in the development and progression of this ensuing neurologic impairment. Despite this, a microglia-specific injury signature has yet to be identified. We hypothesized that TBI would lead to long-term changes in the transcriptional profile of microglial pathways associated with the development of subsequent neurologic impairment.
Project description:In this study, we examined if the composition of plasma miRNAs is altered in patients with traumatic brain injury (TBI), and if these changes can be used as diagnostic markers. A microarray containing 875 human miRNAs was used to compare the miRNA profile of plasma collected from severe TBI patients (GCS M-bM-^IM-$ 8) to that of age-, gender-, and race-matched healthy volunteers. This screen identified 108 miRNAs in the plasma of healthy volunteers. Of these, 52 were found to be altered in plasma samples from persons with severe TBI, and an additional 8 miRNAs were detected only in the plasma of TBI patients. Plasma samples from 10 patients from either severe TBI (experimental group) or healthy volunteers (reference group; age-, gender-, and race-matched ) were pooled, the total RNA extracted in parallel, eluted in 100ul, and dried to 30 ul. Equal volumes of extracted plasma RNAs were assayed for global miRNA content using a service provider (LC Sciences, Houston, TX). There were no replicates performed for this screen. Healthy volunteer group served as the reference.