Related Experiment Video
Updated: Mar 9, 2026
07:38
Strategies for Assessing Autistic-Like Behaviors in Mice
Published on: September 20, 2024
2.6K
Mice lacking GRIP1/2 show increased social interactions and enhanced phosphorylation at GluA2-S880
Mei Han1, Rebeca Mejias1, Shu-Ling Chiu2
1McKusick-Nathans Institute of Genetic Medicine and Department of Pediatrics, Johns Hopkins University, School of Medicine, Baltimore, MD, 21205, USA.
Behavioural Brain Research
|January 9, 2017
Summary
Glutamate receptor interacting proteins 1 and 2 (GRIP1/2) regulate AMPA receptor trafficking. Deleting GRIP1/2 in mice increased social interaction, suggesting a role in autism-related social deficits.
Area of Science:
- Neuroscience
- Molecular Biology
- Behavioral Science
Background:
- Glutamate receptor interacting proteins 1 and 2 (GRIP1/2) are crucial for AMPA receptor trafficking and synaptic strength.
- GRIP1 mutations are linked to social deficits observed in autism spectrum disorder (ASD).
Purpose of the Study:
- To investigate the role of GRIP1/2 in regulating social behaviors.
- To explore the molecular mechanisms underlying GRIP1/2-mediated AMPA signaling in social behavior regulation.
Main Methods:
- Generated neuron-specific GRIP1/2-double knockout (DKO) mice and compared their social behavior to wild-type (WT) littermates.
- Assessed social behaviors using modified three-chamber and dyadic male-male interaction tests.
- Analyzed protein expression and phosphorylation in key signaling pathways (AMPAR, mGluR, mTOR, GABA) in brain regions of DKO and WT mice.
Main Results:
- DKO mice exhibited significantly increased sociability compared to WT mice in behavioral tests.
- Increased phosphorylation of GluA2-Serine 880 (GluA2-pS880) was observed in the frontal cortex of DKO mice.
- Reduced GABAβ3 expression was found in the striatum of DKO mice.
Conclusions:
- GRIP1/2 play a critical role in modulating social behaviors, likely through regulating AMPA receptor trafficking and synaptic plasticity.
- Disruptions in glutamate and GABA signaling in specific brain regions, as observed in DKO mice, may contribute to social behavioral deficits in autism.
