Project description:We report the miRNA-Seq and Nanostring mRNA data from regional brain samples after neonatal hypoxic-ischemic brain injury (induced by unilateral carotid artery ligation and 30 minutes at 8% oxygen in CD1 mice at postnatal day 9). Analyses are perfomed in the cerebellum, striatum/thalamus, and whole cortex. Examination of regional small RNA expression between four postnatal day 9 mouse pups after hypoxic-ischemic brain injury versus four sham surgery controls
Project description:Astrocytes are one of the most abundant cell types in the mammalian central nervous system. Their diversity was widely investigated in the adult brain recently. However, the heterogeneity of astrocyte progenitors in their early developmental stage is still not clear. In this study, we dissected the subpopulations of neural progenitor cells at the neurogenesis and the early gliogenesis stages by single-cell RNA sequencing analysis. Interestingly, we identified two astrocyte progenitor subgroups from the cerebral cortex. The astrocyte subgroups highly express Sparc or Sparcl1, which were reported have contrary functions in astrocytes to regulate synapse formation. Further analysis for subpopulations of neural progenitors from the ventral forebrain also identified two astrocyte progenitor subgroups, showing similar gene expression patterns as in the cortex. Surprisingly, clustering analysis between the subpopulations from the dorsal and the ventral forebrains showed that the astrocyte progenitors expressing Sparc or Sparcl1 were clustered together, irrespective of their derived regions. These results showed an early divergence of astrocyte progenitors and their cross-regional conservation at the start of gliogenesis during brain development.
Project description:Astrocytes were purified from fetal and adult human brain tissue using an immunopanning method with the HepaCAM antibody. Samples were taken from otherwise 'healthy' pieces of tissue, unless otherwise specified. 6 fetal astrocyte samples, 12 adult astrocyte samples, 8 GBM or sclerotic hippocampal samples, 4 whole human cortex samples, 4 adult mouse astrocyte samples, and 11 human samples of other purified CNS cell types
Project description:This pilot metabolomic study will evaluate brain specimens from an established mouse model of AD, the tq2576 mouse model of cerebral amyloid overexpression (APP), in comparison to their non-transgenic (NTG) littermates. These animals were either on a CR or ad libitum (AL) diet, and specimens were collected at two time points (5 and 15 months of age). Tissue from this cohorts of mice have already undergone microbiome analysis, and await coordinated brain and peripheral tissue assessments. Future analysis will include metabolomics, RNA-seq, and microarray data to assess the gut-brain microbiome system in neurodegenerative disorders.
Project description:Aiming to gain brain region- and cell type-specific resolution in gene expression profiling during PD pathogenesis, we applied the translating ribosome affinity purification (TRAP) technique to enrich the ribosome-bound mRNA of DaNs, microglia and astrocyte, for RNA-Seq and analysis in a mouse MPTP model of PD.
