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Rest mutant zebrafish swim erratically and display atypical spatial preferences.

Cara E Moravec1, Edward Li2, Hans Maaswinkel3

  • 1Department of Neurobiology and Behavior, Stony Brook University, Stony Brook, NY 11794, USA; Genetics Gradate Program Stony Brook University, Stony Brook, NY 11794, USA.

Behavioural Brain Research
|February 26, 2015
PubMed
Summary

The Rest transcriptional repressor impacts neural gene expression. Zebrafish rest mutants exhibit altered swimming behaviors and reduced activity, revealing Rest

Keywords:
Erratic swimmingLocomotionNovel environmentRest/NrsfZebrafish

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Area of Science:

  • Neuroscience
  • Genetics
  • Behavioral Science

Background:

  • The Rest/Nrsf transcriptional repressor regulates numerous neural-specific genes involved in nervous system development, plasticity, and synaptogenesis.
  • The role of Rest-mediated transcriptional regulation in behavior remains understudied, partly due to embryonic lethality in mouse models.

Purpose of the Study:

  • To investigate the behavioral requirements for Rest using a zebrafish rest mutant model.
  • To analyze the impact of Rest dysfunction on adult and larval behaviors.

Main Methods:

  • Utilized zebrafish (Danio rerio) rest mutants to assess a spectrum of behaviors in adult and larval stages.
  • Observed adult behaviors in novel environments, including swimming patterns and reproductive success.
  • Evaluated larval activity and sensory responses at 6 days post fertilization (dpf).

Main Results:

  • Adult male and female rest mutants displayed abnormal behaviors in novel environments, such as increased vertical swimming, erratic swimming, and thigmotaxis (staying near tank walls).
  • Adult male rest mutants exhibited diminished reproductive success.
  • Rest mutant larvae at 6 dpf were hypoactive but showed normal responses to light and sound stimuli.

Conclusions:

  • Rest dysfunction leads to atypical swimming patterns and environmental preferences in adult zebrafish.
  • Rest mutation results in reduced locomotor activity in zebrafish larvae.
  • This study presents the first behavioral analysis of rest mutants, identifying specific behaviors modulated by Rest.