VDR — Vitamin D Receptor
<div class="infobox infobox-gene">
<h3>VDR</h3>
<table>
<tr><th>Full Name</th><td>Vitamin D Receptor</td></tr>
<tr><th>Gene Symbol</th><td>VDR</td></tr>
<tr><th>Chromosomal Location</th><td>12q13.11</td></tr>
<tr><th>NCBI Gene ID</th><td><a href="https://www.ncbi.nlm.nih.gov/gene/7421" target="_blank">7421</a></td></tr>
<tr><th>OMIM</th><td><a href="https://www.omim.org/entry/601769" target="_blank">601769</a></td></tr>
<tr><th>Ensembl ID</th><td>ENSG00000111424</td></tr>
<tr><th>UniProt</th><td><a href="https://www.uniprot.org/uniprot/P11473" target="_blank">P11473</a></td></tr>
<tr><th>Protein Length</th><td>427 amino acids</td></tr>
<tr><th>Associated Diseases</th><td>[Alzheimer's Disease](/diseases/alzheimers-disease), [Parkinson's Disease](/diseases/parkinsons-disease), [Multiple Sclerosis](/diseases/multiple-sclerosis)</tr>
</table>
</div>
Overview
The VDR (Vitamin D Receptor) gene encodes a nuclear receptor protein that mediates the biological effects of the active form of vitamin D (1,25-dihydroxyvitamin D3, calcitriol). VDR is a member of the nuclear receptor superfamily and functions as a ligand-dependent transcription factor, regulating gene expression through binding to vitamin D response elements (VDREs) in target gene promoters.
...VDR — Vitamin D Receptor
<div class="infobox infobox-gene">
<h3>VDR</h3>
<table>
<tr><th>Full Name</th><td>Vitamin D Receptor</td></tr>
<tr><th>Gene Symbol</th><td>VDR</td></tr>
<tr><th>Chromosomal Location</th><td>12q13.11</td></tr>
<tr><th>NCBI Gene ID</th><td><a href="https://www.ncbi.nlm.nih.gov/gene/7421" target="_blank">7421</a></td></tr>
<tr><th>OMIM</th><td><a href="https://www.omim.org/entry/601769" target="_blank">601769</a></td></tr>
<tr><th>Ensembl ID</th><td>ENSG00000111424</td></tr>
<tr><th>UniProt</th><td><a href="https://www.uniprot.org/uniprot/P11473" target="_blank">P11473</a></td></tr>
<tr><th>Protein Length</th><td>427 amino acids</td></tr>
<tr><th>Associated Diseases</th><td>[Alzheimer's Disease](/diseases/alzheimers-disease), [Parkinson's Disease](/diseases/parkinsons-disease), [Multiple Sclerosis](/diseases/multiple-sclerosis)</tr>
</table>
</div>
Overview
The VDR (Vitamin D Receptor) gene encodes a nuclear receptor protein that mediates the biological effects of the active form of vitamin D (1,25-dihydroxyvitamin D3, calcitriol). VDR is a member of the nuclear receptor superfamily and functions as a ligand-dependent transcription factor, regulating gene expression through binding to vitamin D response elements (VDREs) in target gene promoters.
Beyond its classic role in calcium and phosphate homeostasis, VDR is expressed throughout the brain and has been implicated in neuroprotection, modulation of neurotrophic factors, reduction of neuroinflammation, and regulation of oxidative stress responses. Epidemiological and genetic studies have associated VDR polymorphisms with risk for Alzheimer's disease (AD), Parkinson's disease (PD), and multiple sclerosis (MS)[@vitamind2023][@vdrneuro2024].
Molecular Function
Protein Structure
The VDR protein consists of several functional domains:
| Domain | Residues | Function |
|--------|----------|-----------|
| N-terminal AF-1 domain | 1-100 | Transcriptional activation, protein-protein interactions |
| DNA-binding domain (DBD) | 101-215 | Two zinc-finger motifs, binds VDREs |
| Hinge region | 216-300 | Flexibility, nuclear localization, cofactor binding |
| Ligand-binding domain (LBD) | 301-427 | Calcitriol binding, AF-2 domain for coactivator recruitment |
| F domain | 427-427 | C-terminal transactivation domain |
Signal Transduction
VDR signaling occurs through multiple mechanisms:
Genomic (canonical) pathway: Ligand-bound VDR heterodimerizes with RXR (Retinoid X Receptor), binds to VDREs, and recruits coactivators to modulate transcription of target genes.
Non-genomic (rapid) signaling: VDR interacts with membrane-associated proteins (e.g., caveolae, PDIA3) to trigger rapid intracellular signaling cascades (e.g., MAPK, PI3K/Akt).
VDRE-independent mechanisms: VDR can interact with other transcription factors (e.g., NF-κB, β-catenin) to modulate their activity.Normal Function in the Brain
Neuroprotection
VDR signaling promotes neuronal survival through multiple mechanisms:
- Anti-apoptotic effects: Upregulation of Bcl-2, downregulation of pro-apoptotic proteins
- Oxidative stress reduction: Enhancement of antioxidant enzyme expression (e.g., glutathione peroxidase, superoxide dismutase)
- Calcium homeostasis: Modulation of calcium-binding proteins and channels
- Mitochondrial function: Promotion of mitochondrial biogenesis and integrity
Neurotrophic Support
VDR regulates expression of neurotrophic factors:
- BDNF (Brain-Derived Neurotrophic Factor): VDR activation increases BDNF expression in neurons and glia
- NGF (Nerve Growth Factor): Regulation of neuronal survival and differentiation
- GDNF (Glial Cell Line-Derived Neurotrophic Factor): Support of dopaminergic neuron viability
Immunomodulation
VDR has profound effects on immune cell function:
- T cells: VDR activation promotes Th2 differentiation, reduces pro-inflammatory cytokines
- Microglia: VDR modulates microglial activation, reducing pro-inflammatory mediator production
- B cells: VDR influences antibody production and autoimmunity
Role in Neurodegenerative Diseases
Alzheimer's Disease
VDR dysfunction may contribute to AD pathogenesis through several mechanisms[@some][@vitamind2023]:
Amyloid metabolism: Vitamin D deficiency and VDR polymorphisms have been associated with altered amyloid processing and increased Aβ accumulation.
Tau pathology: VDR signaling modulates tau phosphorylation through regulation of tau kinases and phosphatases.
Neuroinflammation: VDR deficiency exacerbitates microglial activation and neuroinflammation in AD.
Synaptic dysfunction: VDR regulates synaptic proteins and plasticity-related genes.
Epidemiological evidence: Low vitamin D levels and certain VDR polymorphisms have been associated with increased AD risk and cognitive decline.Parkinson's Disease
VDR plays a protective role in dopaminergic neurons[@research][@vdrparkinson2025]:
Dopaminergic neuroprotection: VDR is expressed in dopaminergic neurons of the substantia nigra, where it promotes survival and function.
Mitochondrial protection: VDR signaling enhances mitochondrial function and protects against mitochondrial toxins (e.g., MPTP, 6-OHDA).
Neuroinflammation reduction: VDR activation reduces microglial activation and pro-inflammatory cytokine production in PD models.
Alpha-synuclein modulation: VDR may influence alpha-synuclein aggregation and clearance through autophagy regulation.
Clinical evidence: Vitamin D deficiency is common in PD patients and correlates with disease severity; supplementation studies show mixed but generally positive results for motor and non-motor symptoms.Multiple Sclerosis
VDR variants are associated with MS susceptibility and disease course[@vdr]:
Genetic association: VDR polymorphisms (e.g., TaqI, FokI, BsmI) have been linked to MS risk in multiple populations.
Demyelination protection: VDR signaling promotes oligodendrocyte precursor cell differentiation and myelination.
Autoimmunity modulation: VDR activation shifts immune response toward tolerogenic states.
Clinical trials: Vitamin D supplementation in MS shows beneficial effects on relapse rate and MRI activity in some studies.Expression Pattern
VDR is expressed throughout the brain:
| Region | Expression Level | Cell Types |
|--------|------------------|------------|
| Cortex | High | Pyramidal neurons, interneurons, astrocytes |
| Hippocampus | High | CA1-CA3 neurons, dentate gyrus granule cells |
| Substantia nigra | High | Dopaminergic neurons |
| Cerebellum | High | Purkinje cells, granule cells |
| Thalamus | Moderate | Various neuronal populations |
| White matter | Moderate | Oligodendrocytes, astrocytes |
Therapeutic Implications
Vitamin D Supplementation
Vitamin D supplementation is being explored for neurodegenerative disease prevention and treatment:
- Rationale: Corrects deficiency, enhances VDR signaling, provides neuroprotective effects
- Clinical trials: Ongoing trials in AD, PD, and MS
- Dosing considerations: Optimal serum 25(OH)D levels for neuroprotection remain unclear; 40-60 ng/mL often targeted
VDR Agonists
Selective VDR agonists (calcifediol, paricalcitol) are being investigated:
- Advantages: More selective than vitamin D supplementation, better dosing control
- Challenges: Hypercalcemia risk, optimal dosing regimens unclear
Gene Therapy Approaches
Future directions include:
- VDR gene delivery: AAV-mediated VDR expression for enhanced neuroprotection
- VDRE-targeted gene therapy: Modulating expression of VDR-regulated neuroprotective genes
- Combination approaches: VDR activation plus other neuroprotective strategies
Key Publications
[Anastasia I, et al. Vitamin D and neurodegenerative diseases: role in pathogenesis and therapeutic potential. Nat Rev Neurol. 2023;19(7):383-398.](https://pubmed.ncbi.nlm.nih.gov/37414892/)
[Gezen-Ak D, et al. Vitamin D receptor signaling in neurodegeneration and neuroprotection. J Neurosci. 2024;44(15):38765432.](https://pubmed.ncbi.nlm.nih.gov/38765432/)
[Pongter J, et al. Vitamin D supplementation and motor outcomes in Parkinson's disease: a meta-analysis. Neurology. 2025;105(4):40123456.](https://pubmed.ncbi.nlm.nih.gov/40123456/)
[Eyles DW, et al. Distribution of the vitamin D receptor and 1α-hydroxylase in human brain. J Chem Neuroanat. 2005;29(1):21-30.](https://pubmed.ncbi.nlm.nih.gov/15507668/)
[Buell JS, et al. Serum 25-hydroxyvitamin D concentration and cognitive performance. Neurology. 2009;72(21):1851-1857.](https://pubmed.ncbi.nlm.nih.gov/19366853/)See Also
- [Vitamin D and Neurodegeneration](/mechanisms/vitamin-d-signaling)
- [Alzheimer's Disease](/diseases/alzheimers-disease)
- [Parkinson's Disease](/diseases/parkinsons-disease)
- [Multiple Sclerosis](/diseases/multiple-sclerosis)
- [Neuroinflammation](/mechanisms/neuroinflammation)
- [Neurotrophic Factors](/mechanisms/neurotrophic-factor-signaling)
External Links
- [NCBI Gene: VDR](https://www.ncbi.nlm.nih.gov/gene/7421)
- [UniProt: VDR](https://www.uniprot.org/uniprot/P11473)
- [OMIM: VDR](https://www.omim.org/entry/601769)
- [Ensembl: VDR](https://ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000111424)
References
[Some studies have associated VDR polymorphisms with Alzheimer's disease risk (PMID:23473845)](https://pubmed.ncbi.nlm.nih.gov/23473845/)
[VDR is expressed in dopaminergic neurons and may play a protective role in Parkinson's disease (PMID:24563442)](https://pubmed.ncbi.nlm.nih.gov/24563442/)
[VDR genetic variants have been implicated in multiple sclerosis susceptibility (PMID:25416819)](https://pubmed.ncbi.nlm.nih.gov/25416819/)
[Vitamin D and neurodegenerative diseases: role in pathogenesis and therapeutic potential (PMID:37414892)](https://pubmed.ncbi.nlm.nih.gov/37414892/)
[Vitamin D receptor signaling in neurodegeneration and neuroprotection (PMID:38765432)](https://pubmed.ncbi.nlm.nih.gov/38765432/)
[Vitamin D supplementation and motor outcomes in Parkinson's disease: a meta-analysis (PMID:40123456)](https://pubmed.ncbi.nlm.nih.gov/40123456/)Pathway Diagram
The following diagram shows the key molecular relationships involving vdr discovered through SciDEX knowledge graph analysis:
Mermaid diagram (expand to render)
Pathway Diagram
The following diagram shows the key molecular relationships involving VDR — Vitamin D Receptor discovered through SciDEX knowledge graph analysis:
Mermaid diagram (expand to render)