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Transcriptomic Profiling of Zebrafish Hair Cells Using RiboTag
Maggie S Matern1, Alisha Beirl2, Yoko Ogawa1
1Department of Otorhinolaryngology Head and Neck Surgery, University of Maryland School of Medicine, Baltimore, MD, United States.
Frontiers in Cell and Developmental Biology
|May 17, 2018
Summary
Researchers developed a new transgenic zebrafish model to study gene expression in hair cells without altering gene activity. This method allows for the analysis of actively translated messenger RNA in intact tissues, aiding in the discovery of novel hair cell genes.
Area of Science:
- Developmental Biology
- Genetics
- Molecular Biology
Background:
- Zebrafish hair cells are evolutionarily homologous to mammalian hair cells, serving as a model for development and function.
- Studying hair cell gene expression is challenging due to cell scarcity and difficulties in dissection.
- Existing methods like cell sorting and single-cell RNA-Seq require tissue dissociation, potentially altering gene expression.
Purpose of the Study:
- To develop a transgenic zebrafish model for analyzing the translatome of inner ear and lateral line hair cells in their native environment.
- To overcome technical challenges in hair cell-specific gene expression profiling.
- To identify novel hair cell-expressed genes without artifacts from tissue processing.
Main Methods:
- Development of a transgenic zebrafish line (Tg(myo6b:RiboTag)) expressing HA-tagged ribosomes specifically in hair cells.
- Utilizing HA-tagged ribosome immunoprecipitation to enrich for actively translated hair cell mRNA from intact zebrafish larvae.
- Performing RNA-sequencing on immunoprecipitated mRNA and whole fish input for translatome analysis.
Main Results:
- The Tg(myo6b:RiboTag) model reliably enriches for actively translated hair cell mRNA.
- RNA-Seq analysis shows enrichment of known hair cell transcripts and depletion of non-hair cell transcripts in the immunoprecipitated material.
- The method successfully identifies novel hair cell-expressed genes in intact zebrafish.
Conclusions:
- The developed transgenic zebrafish model enables accurate hair cell translatome analysis in native tissue.
- This approach avoids gene expression changes associated with tissue dissociation and cell sorting.
- The model is a valuable tool for studying zebrafish hair cell gene expression in various conditions, including development, mutations, and damage.
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