Related Experiment Video

Updated: Jul 8, 2025

Isolation of Region-specific Microglia from One Adult Mouse Brain Hemisphere for Deep Single-cell RNA Sequencing
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Published on: December 3, 2019

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Long-read RNA-seq atlas of novel microglia isoforms elucidates disease-associated genetic regulation of splicing

Jack Humphrey1,2,3,4,5, Erica Brophy1,2,3,4,5, Roman Kosoy1,2,4,6,7

  • 1Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, USA.

Medrxiv : the Preprint Server for Health Sciences
|December 11, 2023
PubMed

Insights

Researchers created a new atlas of microglia gene isoforms using long-read sequencing, revealing novel variants linked to Alzheimer's and Parkinson's disease risk. This atlas enhances understanding of neurodegenerative disease genetics.

Area of Science:

  • Neuroscience
  • Genomics
  • Immunology

Background:

  • Microglia, the brain's immune cells, are genetically linked to neurodegenerative diseases.
  • Previous studies faced challenges identifying genetic effects on splicing due to short sequencing reads.

Approach:

  • Developed the isoform-centric microglia genomic atlas (isoMiGA) using long-read RNA-seq.
  • Identified 35,879 novel microglia isoforms, revealing their role in stimulation response and brain region specificity.
  • Conducted a large-scale meta-analysis of 555 human microglia RNA-seq samples.

Key Points:

  • Novel microglia isoforms are involved in stimulation response and brain region specificity.
  • The study identified associations between microglia isoforms and genetic risk loci for Alzheimer's and Parkinson's diseases.
  • Several loci may influence disease through complex changes in isoform and splice site usage.

Conclusions:

  • The isoMiGA atlas provides a comprehensive resource for studying microglia genomics.
  • This work deepens the understanding of genetic contributions to neurodegenerative diseases.
  • Future research can leverage isoMiGA to explore therapeutic targets in microglia.

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