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The Generation of Zebrafish Mariner Model Using the CRISPR/Cas9 System
Bing Zou1,2, Alexandra A Desmidt2, Rahul Mittal1
1Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, Florida.
Anatomical Record (Hoboken, N.J. : 2007)
|July 2, 2019
Summary
CRISPR/Cas9 gene editing quickly created zebrafish mutants with hearing loss, mimicking human genetic deafness. This rapid method aids in developing new therapies for hearing disorders.
Area of Science:
- Genetics and Genomics
- Developmental Biology
- Otolaryngology
Background:
- Clustered regularly interspaced short palindromic repeat (CRISPR)/CRISPR-associated nuclease 9 (Cas9) technology is a powerful tool for gene editing.
- CRISPR/Cas9 has broad applications in research and gene therapy, but its use in zebrafish hearing research models is limited.
- Zebrafish are valuable models for studying human genetic diseases, including hearing loss.
Purpose of the Study:
- To establish a rapid and effective method for generating zebrafish mutants using CRISPR/Cas9 technology.
- To create zebrafish models for studying the genetic basis of human deafness.
- To investigate the role of Myo7aa in inner ear development and function.
Main Methods:
- Targeted genome editing of the Myo7aa gene in zebrafish using CRISPR/Cas9.
- Phenotypic analysis of CRISPR/Cas9-generated mutants, including swimming behavior and inner ear hair cell morphology.
- Assessment of hearing function and stereociliary bundle development in F0 zebrafish larvae.
Main Results:
- Successfully generated zebrafish mutants by targeting the Myo7aa motor head domain.
- Mutants exhibited unbalanced swimming and disorganized sterocilia, characteristic of Myo7aa dysfunction.
- CRISPR/Cas9 mutants displayed reduced stereociliary bundles and significant hearing loss, validating the model.
Conclusions:
- CRISPR/Cas9 is a fast and efficient method for generating zebrafish models of genetic deafness.
- These zebrafish models accurately recapitulate phenotypes associated with human genetic hearing loss.
- The study provides a valuable platform for further research into the mechanisms and therapies for human genetic deafness.
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