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Nuclei isolation of multiple brain cell types for omics interrogation.

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Summary

We developed a simple 2-day protocol to isolate nuclei from human and rodent brain cells. This method enables cell type-specific genomic and epigenomic analysis for neuroscience research.

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Area of Science:

  • Neuroscience
  • Genomics
  • Epigenomics
  • Molecular Biology

Background:

  • Understanding cell type-specific genomic and epigenomic alterations in the brain is crucial for neuroscience research.
  • Existing methods for nuclei isolation may be complex, time-consuming, or incompatible with various sample types (fresh/frozen, resected/postmortem).

Purpose of the Study:

  • To present a robust and accessible nuclei isolation protocol for cell type-specific genomic and epigenomic interrogation of human and rodent brain tissue.
  • To enable detailed molecular profiling of distinct brain cell populations, including neurons, microglia, oligodendrocytes, and astrocytes.

Main Methods:

  • A 2-day procedure involving tissue homogenization with fixation, nuclei extraction, and antibody staining.
  • Utilizes fluorescence-activated nuclei sorting (FANS) for precise cell population isolation.
  • Compatible with both fresh and frozen brain samples from resected or postmortem tissue.

Main Results:

  • Successfully isolated specific nuclei populations from multiple brain cell types.
  • The protocol is straightforward, requiring no specialized skillsets.
  • Isolated nuclei are suitable for downstream omic-scale sequencing, particularly for epigenomic analyses (histone modifications, TF binding, chromatin accessibility, chromosome architecture).

Conclusions:

  • This nuclei isolation protocol provides a versatile tool for cell type-specific genomic and epigenomic studies in the brain.
  • Facilitates translational research by enabling analysis of archived brain specimens from medical biorepositories.
  • Supports in-depth examination of healthy and diseased brain states at a cellular resolution.