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Target intelligence / Profile preview
Dopamine receptor D3 (DRD3)
- Target
- DRD3
- Molecular classification
- G protein-coupled receptor, GPCR, Receptor
01
Overview
The dopamine receptor D3 (DRD3) is a G protein-coupled receptor primarily expressed in the ventral striatum, thalamus, hippocampus, and cortex. It modulates dopamine synthesis and release, regulates cognition, emotion, and motivation, and is implicated in schizophrenia, drug addiction, Parkinson's disease, and depression. It is a target for antipsychotics and drugs used to treat Parkinson's disease and addiction.
- Other names
- D3 receptorDRD3 receptor
02
Mechanism of action
Inhibition of adenylyl cyclase via Gi/o proteins upon dopamine binding. Acts as an autoreceptor on dopaminergic neurons to modulate dopamine synthesis and release; also present postsynaptically where it influences neuronal signaling pathways.
03
Biological functions
Signal transductionModulation of dopamine synthesis and releaseRegulation of adenylyl cyclase activityCognitive function modulationEmotional regulationMotivational processes
04
Disease associations
SchizophreniaDrug addictionParkinson's diseaseDepressionHepatocellular carcinoma
05
Safety considerations
Potential for off-target effects due to similarity to other dopamine receptors (e.g., D2 receptor)Risk of dyskinesiaSide effects associated with antipsychotic medicationsPotential for paradoxical effects depending on the context (e.g., cell proliferation inhibition or promotion)
06
Interacting drugs
Pramipexole
4 more in the full profile.
07
Biomarkers
DRD3 expression levelsDRD3 polymorphisms
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