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Related Experiment Video

Updated: Mar 2, 2026

Droplet Barcoding-Based Single Cell Transcriptomics of Adult Mammalian Tissues
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Droplet Barcoding-Based Single Cell Transcriptomics of Adult Mammalian Tissues

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Cell fixation and preservation for droplet-based single-cell transcriptomics.

Jonathan Alles1, Nikos Karaiskos1, Samantha D Praktiknjo1

  • 1Systems Biology of Gene Regulatory Elements, Berlin Institute for Medical Systems Biology (BIMSB), Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC), 13125, Berlin, Germany.

BMC Biology
|May 21, 2017
PubMed
Summary
This summary is machine-generated.

Methanol fixation preserves cells for weeks, enabling reliable single-cell RNA sequencing. This method overcomes challenges in collecting rare cells and analyzing samples from different locations, advancing transcriptional profiling.

Keywords:
Alcohol-based fixationDrop-seqDroplet-based single-cell transcriptomicsFixationFluorescent activated cell sorting (FACS)Gene expression profilingMethanolPrimary cellsTissue

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Area of Science:

  • Molecular Biology
  • Genomics
  • Microfluidics

Background:

  • Droplet-based microfluidics enables high-throughput single-cell transcriptional profiling.
  • Cell preparation for single-cell RNA sequencing is limited by stress, aging, and the need for immediate processing.
  • Challenges include handling rare cells and samples collected over extended periods or from diverse locations.

Purpose of the Study:

  • To develop a chemical fixation method for stabilizing cells for single-cell RNA sequencing.
  • To overcome limitations in cell preparation and sample handling for droplet-based microfluidics.

Main Methods:

  • Chemical fixation using methanol to stabilize dissociated cells.
  • Single-cell RNA sequencing (scRNA-seq) of fixed and unfixed cells.
  • Analysis of mixed human and mouse cells to validate species assignment.
  • Application of fixation to primary cells from complex tissues (Drosophila embryos, mouse brain).

Main Results:

  • Methanol fixation allows cell preservation for weeks without compromising scRNA-seq data quality.
  • Transcriptome data from fixed and live cells showed good correlation with bulk mRNA sequencing.
  • Successful transcriptional profiling of primary cells from complex tissues, including identification of neuronal subtypes.
  • Development of 'dropbead' R package for Drop-seq data analysis.

Conclusions:

  • Chemical fixation, specifically methanol fixation, provides a robust method for preserving cells for scRNA-seq.
  • This technique addresses critical challenges in single-cell analysis, enabling broader applications.
  • The method facilitates the study of transcriptional dynamics in diverse biological contexts at single-cell resolution.