Enteric Neurons in Parkinson's Disease

Enteric Neurons in Parkinson's Disease

<table class="infobox infobox-cell">
<tr>
<th class="infobox-header" colspan="2">Enteric Neurons in Parkinson's Disease</th>
</tr>
<tr>
<td class="label">Taxonomy</td>
<td>ID</td>
</tr>
<tr>
<td class="label">Cell Ontology (CL)</td>
<td>[CL:0007011](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0007011)</td>
</tr>
<tr>
<td class="label">Database</td>
<td>ID</td>
</tr>
<tr>
<td class="label">Cell Ontology</td>
<td>[CL:0007011](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0007011)</td>
</tr>
<tr>
<td class="label">Cell Ontology</td>
<td>[CL:4040002](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_4040002)</td>
</tr>
</table>

Introduction

Enteric Neurons In Parkinson'S Disease is a cell type relevant to neurodegenerative disease research. This page covers its role in brain function, involvement in disease processes, and significance for therapeutic strategies.

Overview

Enteric neurons are neurons located in the gastrointestinal tract that form the enteric nervous system (ENS), often called the "second brain." These neurons are critically involved in Parkinson's disease (PD) due to the presence of alpha-synuclein pathology in the gut years before motor symptoms appear—the brain-gut axis hypothesis of PD pathogenesis. [@klingelhoefer2015]

<!-- taxonomy-enrichment --> [@sampson2016]

...

Enteric Neurons in Parkinson's Disease

<table class="infobox infobox-cell">
<tr>
<th class="infobox-header" colspan="2">Enteric Neurons in Parkinson's Disease</th>
</tr>
<tr>
<td class="label">Taxonomy</td>
<td>ID</td>
</tr>
<tr>
<td class="label">Cell Ontology (CL)</td>
<td>[CL:0007011](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0007011)</td>
</tr>
<tr>
<td class="label">Database</td>
<td>ID</td>
</tr>
<tr>
<td class="label">Cell Ontology</td>
<td>[CL:0007011](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0007011)</td>
</tr>
<tr>
<td class="label">Cell Ontology</td>
<td>[CL:4040002](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_4040002)</td>
</tr>
</table>

Introduction

Enteric Neurons In Parkinson'S Disease is a cell type relevant to neurodegenerative disease research. This page covers its role in brain function, involvement in disease processes, and significance for therapeutic strategies.

Overview

Enteric neurons are neurons located in the gastrointestinal tract that form the enteric nervous system (ENS), often called the "second brain." These neurons are critically involved in Parkinson's disease (PD) due to the presence of alpha-synuclein pathology in the gut years before motor symptoms appear—the brain-gut axis hypothesis of PD pathogenesis. [@klingelhoefer2015]

<!-- taxonomy-enrichment --> [@sampson2016]

<!-- multi-taxonomy-enrichment -->

Multi-Taxonomy Classification

Taxonomy Database Cross-References

Morphology & Electrophysiology

• Morphology: enteric neuron (source: Cell Ontology)
• Morphology can be inferred from Cell Ontology classification

PanglaoDB Marker Cross-References

• Unknown (PanglaoDB):

External Database Links

• [Cell Ontology (CL:0007011)](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0007011)
• [OBO Foundry (CL:0007011)](http://purl.obolibrary.org/obo/CL_0007011)
• [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/)
• [PanglaoDB](https://panglaodb.se/)

Taxonomy & Classification

PanglaoDB Marker Cross-References

• Unknown (PanglaoDB):

External Database Links

• [Cell Ontology (CL:0007011)](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0007011)
• [OBO Foundry (CL:0007011)](http://purl.obolibrary.org/obo/CL_0007011)
• [Allen Brain Cell Atlas](https://portal.brain-map.org/atlases-and-data/bkp/abc-atlas)
• [CellxGene Census](https://cellxgene.cziscience.com/)
• [PanglaoDB](https://panglaodb.se/)

Anatomy of the Enteric Nervous System

Major Plexuses

The ENS contains two primary neural networks:

Myenteric plexus (Auerbach's plexus)

• Located between longitudinal and circular muscle layers
• Controls gut motility
• Primary coordinator of peristalsis

Submucosal plexus (Meissner's plexus)

• Located in the submucosa
• Regulates secretion and blood flow
• Sensory functions

Neuron Types

Enteric neurons include:

• Cholinergic neurons: Excitatory, promote motility
• Nitric oxide (NO) neurons: Inhibitory, relax smooth muscle
• VIP neurons: Secretion modulation
• 5-HT neurons: Sensory signaling
• Primary afferent neurons: Gut-brain communication

Alpha-Synuclein in the Gut

The Braak Hypothesis

According to the Braak hypothesis:

Pathogenic agents enter via the gut

Alpha-synuclein pathology begins in enteric neurons

Pathology spreads via the vagus nerve to the brainstem

Later progresses to midbrain and cortex

Evidence

• Lewy bodies found in enteric neurons pre-mortem
• Colon biopsies detect phosphorylated alpha-synuclein
• Constipation often precedes motor symptoms by years
• Vagotomy reduces PD risk

Gut Dysfunction in PD

Gastrointestinal Symptoms

PD patients commonly experience:

• Constipation: Most common GI symptom
• Gastroparesis: Delayed gastric emptying
• Small intestinal bacterial overgrowth (SIBO)
• Dysphagia: Swallowing difficulties

Mechanisms

Alpha-synuclein pathology: Direct neuronal damage

Autonomic dysfunction: Vagal nerve impairment

Medication effects: Dopaminergic drugs affect gut motility

Microbiome changes: Altered gut flora

Microbiome-Gut-Brain Axis

Dysbiosis in PD

PD patients show:

• Reduced microbial diversity
• Increased pro-inflammatory species
• Decreased anti-inflammatory bacteria
• Reduced short-chain fatty acid (SCFA) producers

Implications

• Inflammation: Systemic inflammation affects brain
• Metabolites: SCFAs modulate microglial activity
• Pathogen transmission: Potential for prion-like spread

Clinical Implications

Biomarker Potential

• Rectal biopsy: Detection of alpha-synuclein
• Colonoscopy: Early pathology detection
• Gut microbiome: Potential diagnostic marker

Therapeutic Approaches

Probiotics: Modulate gut microbiome

Antibiotics: Treat SIBO

Laxatives: Manage constipation

Dietary interventions: Fiber, Mediterranean diet

See Also

• [Parkinson's Disease](/diseases/parkinsons-disease)
• [Gut-Brain Axis](/brain-regions/gut-brain-axis)
• [Alpha-Synuclein](/proteins/alpha-synuclein)
• [Microbiome](/entities/microbiome)
• [Vagus Nerve](/brain-regions/vagus-nerve)
• [Autophagy](/mechanisms/autophagy-lysosome-neurodegeneration)

Background

The study of Enteric Neurons In Parkinson'S Disease 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