Vasoactive Intestinal Peptide Neurons

Vasoactive Intestinal Peptide Neurons

Introduction

<table class="infobox infobox-cell">
<tr>
<th class="infobox-header" colspan="2">Vasoactive Intestinal Peptide Neurons</th>
</tr>
<tr>
<td class="label">Database</td>
<td>ID</td>
</tr>
<tr>
<td class="label">Cell Ontology</td>
<td>[CL:0002269](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0002269)</td>
</tr>
<tr>
<td class="label">Taxonomy</td>
<td>ID</td>
</tr>
<tr>
<td class="label">Cell Ontology (CL)</td>
<td>[CL:0002269](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0002269)</td>
</tr>
</table>

Vasoactive Intestinal Peptide [Neurons](/entities/neurons) is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

Overview

Vasoactive Intestinal Peptide Neurons

Introduction

<table class="infobox infobox-cell">
<tr>
<th class="infobox-header" colspan="2">Vasoactive Intestinal Peptide Neurons</th>
</tr>
<tr>
<td class="label">Database</td>
<td>ID</td>
</tr>
<tr>
<td class="label">Cell Ontology</td>
<td>[CL:0002269](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0002269)</td>
</tr>
<tr>
<td class="label">Taxonomy</td>
<td>ID</td>
</tr>
<tr>
<td class="label">Cell Ontology (CL)</td>
<td>[CL:0002269](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0002269)</td>
</tr>
</table>

Vasoactive Intestinal Peptide [Neurons](/entities/neurons) is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

Overview

Vasoactive Intestinal Peptide (VIP) neurons are a major class of cortical interneurons characterized by their expression of the neuropeptide VIP. These neurons play critical roles in regulating cortical circuitry, particularly in disinhibition and modulating sensory processing. VIP interneurons primarily inhibit other interneurons, creating a disinhibitory circuit that allows for focused processing of salient information. [@supsup2019]

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Taxonomy & Classification

External Database Links

• [Cell Ontology (CL:0002269)](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0002269)
• [OBO Foundry (CL:0002269)](http://purl.obolibrary.org/obo/CL_0002269)
• [Allen Brain Cell Atlas](https://portal.brain-map.org/atlases-and-data/bkp/abc-atlas)
• [CellxGene Census](https://cellxgene.cziscience.com/)

Multi-Taxonomy Classification

Taxonomy Database Cross-References

External Database Links

• [Cell Ontology (CL:0002269)](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0002269)
• [OBO Foundry (CL:0002269)](http://purl.obolibrary.org/obo/CL_0002269)
• [Allen Brain Cell Atlas](https://portal.brain-map.org/atlases-and-data/bkp/abc-atlas)
• [CellxGene Census](https://cellxgene.cziscience.com/)
• [Human Cell Atlas](https://www.humancellatlas.org/)

Neuroanatomy

Distribution

• [Cortex](/brain-regions/cortex): Primarily layers 2/3
• [Hippocampus](/brain-regions/hippocampus): CA1, CA3 regions
• Thalamus: Specific relay nuclei
• Subcortical structures: Striatum, hypothalamus

Morphology

• Bipolar cells: Elongated soma with two dendrites
• Bitufted cells: Two tufts of dendrites
• Axon projections: Local to other interneurons

Key Markers

• VIP (Vasoactive Intestinal Polypeptide): Primary marker
• Calretinin (CALB2): Often co-expressed
• [Acetylcholine](/entities/acetylcholine): May be co-released
• CCK: Sometimes co-expressed

Electrophysiology

Firing Properties

• Late-spiking: Characteristic delayed firing
• Adaptation: Accommodation to sustained input
• Frequency: Regular spiking, moderate rates
• Accommodation: Frequency adaptation over time

Ion Channel Expression

• HCN channels: Prominent Ih current
• T-type calcium: Low-threshold calcium spikes
• Sodium channels: StandardNav1.2/1.6

Circuit Functions

Disinhibition

• Inhibit SST neurons: Reduce dendritic inhibition
• Inhibit PV neurons: Reduce somatic inhibition
• Net effect: Disinhibit pyramidal cells
• Function: Enhance signal propagation

Modulatory Roles

• Attention: VIP involved in attention circuits
• Sensory processing: Modulate sensory responses
• Memory: Hippocampal VIP in memory circuits
• Arousal: VIP in cortical activation

Network Oscillations

• Theta oscillations: Phase relationship with VIP
• Gamma oscillations: Contribute to 40 Hz rhythms
• State-dependent: Changes with behavioral state

Role in Neurodegeneration

Alzheimer's Disease

• Early changes: VIP neuron alterations
• Disinhibition: May contribute to hyperexcitability
• Circuit dysfunction: Network oscillations impaired
• Memory circuits: Hippocampal VIP disruption

Parkinson's Disease

• Cortical changes: VIP expression altered
• Oscillations: Beta rhythm abnormalities
• Cognitive deficits: Prefrontal cortex dysfunction

Epilepsy

• VIP changes: May contribute to seizure activity
• Disinhibitory circuits: Uncontrolled excitation
• Therapeutic targets: VIP receptor modulators

VIP Receptor Signaling

VPAC1 (VIPR1)

• G protein: Gs-coupled
• Second messenger: cAMP increase
• Location: CNS neurons, glia
• Effects: Excitatory, trophic

VPAC2 (VIPR2)

• G protein: Gs-coupled
• Second messenger: cAMP increase
• Location: Widely expressed
• Effects: Circadian regulation

PAC1 (ADCYAP1R1)

• Also binds: Pituitary adenylate cyclase-activating polypeptide (PACAP)
• G protein: Multiple (Gs, Gq)
• Effects: Trophic, neuroprotective

Therapeutic Implications

Drug Development

• VIP analogs: Treatative potential
• PACAP: Neuroprotective effects
• Receptor agonists: VPAC2 selective

Research Applications

• Optogenetics: Cre-driver lines
• Chemogenetics: DREADDs
• Calcium imaging: GCaMP expression

Background

The study of Vasoactive Intestinal Peptide Neurons 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.

External Links

• [PubMed](https://pubmed.ncbi.nlm.nih.gov/) - Biomedical literature
• [Alzheimer's Disease Neuroimaging Initiative](https://adni.loni.usc.edu/) - Research data
• [Allen Brain Atlas](https://brain-map.org/) - Brain gene expression data

See Also

• [Principal Pars Compacta](/wiki/cell-types-principal-pars-compacta) — associated_with
• [Principal Pars Compacta](/wiki/cell-types-principal-pars-compacta) — expressed_in
• [Principal Pars Compacta](/wiki/cell-types-principal-pars-compacta) — inhibits
• [ADAM10 — A Disintegrin And Metalloproteinase Domain 10](/wiki/genes-adam10) — inhibits

Pathway Diagram

The following diagram shows the key molecular relationships involving Vasoactive Intestinal Peptide Neurons discovered through SciDEX knowledge graph analysis: