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Shank3 mutant mice display autistic-like behaviours and striatal dysfunction.
João Peça1, Cátia Feliciano, Jonathan T Ting
1Department of Neurobiology, Duke University Medical Center, Durham, North Carolina 27710, USA.
Nature
|March 23, 2011
Summary
SHANK3 gene disruption causes autistic-like behaviors in mice, including social deficits and repetitive actions. This study highlights SHANK3
Area of Science:
- Neuroscience
- Genetics
- Developmental Biology
Background:
- Autism spectrum disorders (ASDs) are neurodevelopmental conditions characterized by social and communication deficits, alongside repetitive behaviors.
- The precise neurological underpinnings and circuitry mechanisms of ASDs remain largely unknown.
- Genetic disruptions in the SHANK3 gene are implicated in 22q13 deletion syndrome (Phelan-McDermid syndrome) and some non-syndromic ASDs.
Purpose of the Study:
- To investigate the role of the SHANK3 gene in the development of autistic-like behaviors.
- To elucidate the cellular and circuit-level defects associated with Shank3 gene disruption.
Main Methods:
- Utilized Shank3 gene deletion in mice to model genetic disruptions.
- Conducted cellular, electrophysiological, and biochemical analyses.
- Assessed behavioral phenotypes including social interaction and repetitive grooming.
Main Results:
- Shank3 mutant mice displayed significant deficits in social interaction.
- Mutant mice exhibited self-injurious repetitive grooming behaviors.
- Analysis revealed defects in striatal synapses and cortico-striatal circuits.
Conclusions:
- The SHANK3 gene plays a critical role in the normal development of neuronal connectivity.
- Disruption of the Shank3 gene causally links to the emergence of autistic-like behaviors in a mouse model.
- These findings provide insights into the molecular and circuit basis of ASDs.
