An Optimized Protocol for the Mapping of Cell Type-Specific Ribosome-Associated Transcript Isoforms from Small Mouse...

Area of Science:

• Molecular Biology
• Neuroscience
• Genetics

Background:

• Technological advances in transcriptomics offer deep insights into gene expression.
• Ribosome-associated transcript isolation is a powerful method for cell type-specific transcript profiling and isoform analysis.

Purpose of the Study:

• To describe the application of RiboTag for identifying the transcriptome of excitatory neurons in the mouse olfactory bulb.
• To leverage conditional ribosome epitope-tagging for targeted mRNA isolation.

Main Methods:

• Utilized conditional ribosome epitope-tagging in genetically defined cell types.
• Employed affinity isolation of ribosome-associated messenger RNAs (mRNAs).
• Applied RiboTag isolation in the vGlut2-IRES-cre mouse line for targeted ribosome tagging.

Main Results:

• Successfully identified the transcriptome of mitral and tufted cells (excitatory neurons) in the mouse olfactory bulb.
• Demonstrated the method's ability to retrieve mRNAs without tissue dissociation or cell sorting.
• Enriched for actively translated transcripts, approximating the cellular translatome.

Conclusions:

• RiboTag is an effective method for profiling cell type-specific transcriptomes, particularly for actively translated mRNAs.
• The approach facilitates rapid mRNA retrieval and quantitative analysis of transcript isoforms.
• This technique provides valuable insights into the molecular mechanisms of neuronal function.