Please note that we have stopped the regular imports of Gene Expression Omnibus (GEO) data into ArrayExpress. This may not be the latest version of this experiment.
E-GEOD-43366 - Transcription profiling by high throughput sequencing of acutely isolated microglia from an amyotrophic lateral sclerosis mouse model
Released on 15 July 2013, last updated on 15 June 2016
Purpose: We purified spinal cord microglia utilizing percoll gradients and magnetic beads, followed by transcriptome profiling (RNA-seq) to define microglia expression profiles against other neural, immune cell-types. We next observed how the microglial transcriptomes change during activation in the SOD1-G93A mouse model of motor neuron degeneration at 3 time points. We also compared these profiles with that induced by LPS injection. Results and conclusions: ALS microglia were found to differ substantially from those activated by LPS and from M1/M2 macrophages by comparison with published datasets. These ALS microglia showing substantial induction of a neurodegeneration-tailored phenotype, with induction of lysosomal, RNA splicing, and Alzheimer's disease pathway genes. Overall they express a mixture of neuroprotective and neurotoxic factors during activation in ALS mice, showing that neuro-immune activation in the spinal cord is a double-edged sword. We also detected the transcriptional nature of surface marker expression in microglia (CD11b, CD86, CD11c), and substantial T-cell microglia cross-talk using correlative microglia transcriptome/FACS analysis. 42 total RNA samples from purified spinal cord microglia were subjected to paired-end RNA-sequencing. Parallel flow cytometry data was collected from the same spinal cords.
RNA-seq of coding RNA
Isaac M Chiu, Sean O'Keeffe, Tom Maniatis
A neurodegeneration-specific gene-expression signature of acutely isolated microglia from an amyotrophic lateral sclerosis mouse model. Chiu IM, Morimoto ET, Goodarzi H, Liao JT, O'Keeffe S, Phatnani HP, Muratet M, Carroll MC, Levy S, Tavazoie S, Myers RM, Maniatis T. , PMID:23850290