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Updated: Mar 15, 2026
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Functional Manipulation of Maternal Gene Products Using In Vitro Oocyte Maturation in Zebrafish
Published on: April 22, 2017
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Maternal Rest/Nrsf Regulates Zebrafish Behavior through snap25a/b
Cara E Moravec1, John Samuel2, Wei Weng3
1Department of Neurobiology and Behavior and Genetics Gradate Program, Stony Brook University, Stony Brook, New York 11794.
Summary
Maternally supplied Rest (RE1-silencing transcription factor) is crucial for regulating larval behavior and has lifelong impacts. Zebrafish lacking maternal Rest show hyperactivity and altered spatial preferences, demonstrating its role in neural development.
Area of Science:
- Developmental Biology
- Neuroscience
- Genetics
Background:
- Maternal factors in oocytes significantly influence embryonic development.
- The RE1-silencing transcription factor (Rest) represses neural-specific genes via chromatin modification.
- Early life gene expression profoundly affects lifelong physiological and behavioral traits.
Purpose of the Study:
- To investigate the role of maternally supplied Rest in zebrafish larval development and lifelong behavior.
- To identify target genes regulated by maternal Rest during early development.
- To determine the necessity of maternal Rest for normal neural gene expression and behavior.
Main Methods:
- Zebrafish model system for studying maternal gene effects.
- Behavioral assays to assess larval and adult activity and spatial preferences.
- Transcriptome sequencing (RNA-Seq) to identify maternal Rest-regulated genes.
- Genetic manipulation (RE1 site disruption) to study gene function.
Main Results:
- Maternal Rest deficiency leads to hyperactivity and atypical spatial preferences in zebrafish larvae and adults.
- 158 genes, including synaptic genes like snap25a/b, were identified as repressed by maternal Rest.
- Maternal Rest is required for target gene repression until at least 6 days post-fertilization.
- Disruption of RE1 sites in snap25a/b recapitulated hyperactivity, and altered motor neuron architecture was observed.
Conclusions:
- Maternal Rest is essential for repressing key target genes, such as snap25a/b, to modulate larval behavior.
- Zygotic Rest cannot compensate for the loss of maternal Rest, highlighting temporal requirements for Rest activity.
- Early Rest-mediated gene repression has lasting impacts on behavior, with implications for neural development and disease.
