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Updated: Jun 28, 2026
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Comprehensive Profiling of Dopamine Regulation in Substantia Nigra and Ventral Tegmental Area
Published on: August 10, 2012
Altered striatal dopamine regulation in Adgrl3 knockout mice
Nicole A Perry-Hauser1,2,3,4, Arturo Torres-Herraez1,2,3, Siham Boumhaouad1,2,3,5,6
1Department of Psychiatry, Columbia University Vagelos College of Physicians and Surgeons, New York, NY, USA.
Summary
The adhesion G protein-coupled receptor 3 (ADGRL3) influences dopamine release in the striatum. Loss of ADGRL3 alters dopamine signaling, impacting reward processing and behavior, potentially explaining links to ADHD.
Area of Science:
- Neuroscience
- Molecular Biology
- Genetics
Background:
- Dopamine signaling is crucial for movement, learning, and reward, with dysregulation linked to ADHD and substance use disorder.
- ADGRL3, a brain-enriched adhesion G protein-coupled receptor, is genetically associated with these neuropsychiatric conditions.
- Previous studies show Adgrl3 knockout mice exhibit altered dopaminergic markers and behaviors, but the precise impact on dopamine dynamics is unclear.
Purpose of the Study:
- To investigate the role of ADGRL3 in regulating striatal dopamine release and dynamics.
- To characterize dopamine release in Adgrl3 knockout mice using both ex vivo and in vivo methods.
Main Methods:
- Fast-scan cyclic voltammetry in acute brain slices to measure electrically evoked dopamine release.
- In vivo fiber photometry with the dLight1.2 sensor during an operant fixed interval task.
- Amphetamine challenge experiments to assess dopamine release capacity.
Main Results:
- Adgrl3 knockout mice showed increased electrically evoked dopamine release in dorsal and ventral striatum ex vivo.
- In vivo, Adgrl3 knockout mice exhibited reduced cue-induced dopamine signals in the ventral striatum during a task.
- Behaviorally, knockout mice displayed longer latencies for reward acquisition, suggesting impaired cue-guided responses.
Conclusions:
- ADGRL3 plays a significant role in regulating striatal dopamine release.
- The findings suggest ADGRL3 loss impacts dopamine dynamics, potentially contributing to ADHD-like behavioral deficits.
- Further research is needed to understand how ADGRL3 loss affects the spatial organization of dopaminergic terminals.
