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Transcriptomics and Phenotypic Analysis of gpr56 Knockout in Zebrafish.
Luning Sun1,2, Boyu Yang3, Zheng Peng3
1Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, Laboratory of Animal Nutrition and Human Health, College of Life Sciences, Hunan Normal University, Changsha 410081, China.
International Journal of Molecular Sciences
|May 13, 2023
Summary
GPR56 deficiency in zebrafish disrupts innate immunity and digestive enzyme gene expression, leading to hyperactive juvenile fish. This study reveals systemic effects of GPR56 mutation on zebrafish development.
Area of Science:
- Developmental Biology
- Genetics
- Neuroscience
Background:
- Adhesion G-protein-coupled receptor GPR56 is crucial for human brain development.
- GPR56 mutations are linked to intellectual disability and motor dysfunction.
- Previous zebrafish studies on GPR56 focused solely on the nervous system.
Purpose of the Study:
- To investigate the systemic effects of GPR56 deficiency in juvenile zebrafish.
- To characterize gene expression changes and behavioral alterations in GPR56-knockout zebrafish.
Main Methods:
- CRISPR/Cas9 gene editing was used to create GPR56-knockout zebrafish.
- RNA sequencing (RNA-seq) analyzed differential gene expression in 3 days post fertilization (dpf) homozygotes.
- Quantitative PCR (qPCR) and in situ hybridization validated gene expression patterns.
- Motor ability tests assessed behavioral changes in mutant zebrafish.
Main Results:
- GPR56 deficiency led to disordered expression of innate immunity-related genes.
- Genes encoding pancreatic exocrine digestive enzymes were significantly downregulated in mutants.
- GPR56-knockout zebrafish exhibited increased motor activity, especially under cold and additional stimuli.
Conclusions:
- GPR56 plays a role in regulating innate immunity and digestive functions in juvenile zebrafish.
- GPR56 deficiency results in hyperactive behavior in zebrafish.
- These findings provide insights into the developmental mechanisms of GPR56.
