Glyoxal as an alternative fixative for single-cell RNA sequencing

Area of Science:

• Molecular Biology
• Genomics
• Cell Biology

Background:

• Single-cell RNA sequencing (scRNA-seq) is crucial for cell type identification, differentiation trajectory analysis, and understanding cellular heterogeneity.
• Current cell isolation protocols often alter transcriptomes, posing a significant challenge for scRNA-seq experiments.
• Preserving cellular states during sample processing is essential for accurate scRNA-seq analysis.

Purpose of the Study:

• To develop and evaluate glyoxal-based fixation protocols for single-cell RNA sequencing applications.
• To assess the efficacy of glyoxal fixation in preserving cellular transcriptomes for scRNA-seq.
• To determine if glyoxal fixation introduces significant changes in gene expression profiles.

Main Methods:

• Development and benchmarking of glyoxal fixation protocols.
• Application of Drop-seq methodology for single-cell RNA sequencing.
• Comparative analysis of gene expression data between glyoxal-fixed and unfixed cells.

Main Results:

• High transcript and gene detection in glyoxal-fixed Drosophila cells using Drop-seq.
• Strong correlation in gene expression data between glyoxal-fixed and unfixed Drosophila and human cells.
• Minimal induction of considerable gene expression changes by the glyoxal fixation protocol.

Conclusions:

• Glyoxal serves as a suitable fixative for preserving transcriptomes in Drosophila cells for high-quality scRNA-seq.
• The developed protocol effectively conserves cellular transcriptomes, enabling reliable downstream single-cell isolation and analysis.
• Glyoxal fixation shows potential for application in scRNA-seq across various species.