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Strategies for Assessing Autistic-Like Behaviors in Mice
Published on: September 20, 2024
Social approach in genetically engineered mouse lines relevant to autism
S S Moy1, J J Nadler, N B Young
1Neurodevelopmental Disorders Research Center, University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA. ssmoy@med.unc.edu
Genes, Brain, and Behavior
|November 20, 2008
Summary
Loss of Fmr1 or Slc6a4 gene function in mice impairs social interaction, a core autism symptom. Genetic background influences Fmr1 mutation effects on sociability.
Area of Science:
- Neuroscience
- Genetics
- Developmental Biology
Background:
- Social interaction impairment is a core symptom of autism spectrum disorder (ASD).
- Mouse models are crucial for understanding the genetic underpinnings of ASD.
- Genes implicated in ASD include Fmr1, Slc6a4, Igf-1, En2, and Dhcr7.
Purpose of the Study:
- To evaluate sociability and social novelty preference in mouse models of ASD.
- To investigate the impact of specific gene mutations (Fmr1, Slc6a4, Igf-1) on social behavior.
- To explore the influence of genetic background on the behavioral consequences of Fmr1 mutations.
Main Methods:
- Utilized a three-chambered choice task to assess social behavior in mice.
- Tested Fmr1 mutant mice on C57BL/6J and FVB/129 genetic backgrounds.
- Examined mice with targeted disruption of Slc6a4 and conditional overexpression of Igf-1.
Main Results:
- Fmr1 mutations led to reduced sociability on the FVB/129 background.
- Slc6a4 gene disruption significantly decreased sociability compared to wild-type controls.
- Igf-1 overexpression did not alter social approach levels.
- En2 and Dhcr7 mutant mice showed low exploration, limiting behavioral interpretation.
Conclusions:
- Loss of Fmr1 or Slc6a4 gene function can cause social deficits relevant to autism.
- The FVB/129 genetic background increases susceptibility to Fmr1 mutation effects on social behavior.
- These findings highlight the role of specific genes and genetic background in ASD-related social impairments.
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