Drd4 Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
The DRD4 gene encodes the dopamine D4 receptor, a G protein-coupled receptor highly expressed in the prefrontal cortex, hippocampus, and hypothalamus[1][2]. This receptor has the highest dopamine affinity among D2-like receptors and is notable for its polymorphism in the promoter region, which has been extensively studied in relation to personality traits and neuropsychiatric disorders[^3].
| Attribute |
Value |
| Gene Symbol |
DRD4 |
| Full Name |
Dopamine Receptor D4 |
| Chromosome |
11p15.5 |
| NCBI Gene ID |
1819 |
| Ensembl ID |
ENSG00000169605 |
| UniProt |
P21970 |
The D4 receptor is coupled to Gi/o proteins, inhibiting adenylyl cyclase and reducing cAMP production[^4]. It is primarily expressed in postsynaptic neurons and modulates:
- Prefrontal cortex function: Working memory and executive function
- Attention modulation: ADHD pathophysiology
- Reward processing: Response to novelty and reinforcement
- DRD4 7-repeat allele associated with ADHD risk
- Linked to impaired response inhibition
- stimulant medications target this receptor indirectly
- D4 receptor density altered in PD prefrontal cortex
- May contribute to cognitive dysfunction
- D4 agonists investigated for neuroprotection[^5]
- Association with antipsychotic response
- Link to positive and negative symptoms
- 7-repeat allele may confer risk
- Personality traits (novelty seeking)
- Substance use disorders
- Pathological gambling
| Drug/Agent |
Mechanism |
Status |
| A-412997 |
D4-selective agonist |
Research |
| L-745,870 |
D4-selective antagonist |
Research |
| Clozapine |
D4 antagonist |
FDA approved for schizophrenia |
| Methylphenidate |
Indirect D4 modulation |
FDA approved for ADHD |
- Van Tol HH, et al. (1992). 'Cloning of the gene for a human dopamine D4 receptor with high affinity for the antipsychotic clozapine.' Nature. PMID:1326531
- Sunahara RK, et al. (1991). 'Cloning of the cDNA for a human dopamine D5 receptor with higher affinity for dopamine than D1.' Nature. PMID:1840644
- Oak JN, et al. (2000). 'Dopamine D4 receptors: from structure to function.' Cellular and Molecular Neurobiology. PMID:10696518
- Faraone SV, et al. (1999). 'Molecular genetics of attention-deficit/hyperactivity disorder.' Biological Psychiatry. PMID:10572216
- Seeman P, et al. (1995). 'Dopamine D4 receptors: role in psychiatry.' Neuropsychopharmacology. PMID:8573982
The study of Drd4 Gene has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
- Van Tol HH, et al. (1992). 'Cloning of the gene for a human dopamine D4 receptor with high affinity for the antipsychotic clozapine.' Nature. PMID:1326531
- Sunahara RK, et al. (1991). 'Cloning of the cDNA for a human dopamine D5 receptor with higher affinity for dopamine than D1.' Nature. PMID:1840644
- Oak JN, et al. (2000). 'Dopamine D4 receptors: from structure to function.' Cellular and Molecular Neurobiology. PMID:10696518
- Faraone SV, et al. (1999). 'Molecular genetics of attention-deficit/hyperactivity disorder.' Biological Psychiatry. PMID:10572216
- Seeman P, et al. (1995). 'Dopamine D4 receptors: role in psychiatry.' Neuropsychopharmacology. PMID:8573982