Area Postrema Neurons

Area Postrema Neurons

Overview

<table class="infobox infobox-cell">
<tr>
<th class="infobox-header" colspan="2">Area Postrema Neurons</th>
</tr>
<tr>
<td class="label">Database</td>
<td>ID</td>
</tr>
<tr>
<td class="label">Cell Ontology</td>
<td>[CL:0008044](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0008044)</td>
</tr>
<tr>
<td class="label">Taxonomy</td>
<td>ID</td>
</tr>
<tr>
<td class="label">Cell Ontology (CL)</td>
<td>[CL:0008044](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0008044)</td>
</tr>
<tr>
<td class="label">Marker</td>
<td>Function</td>
</tr>
<tr>
<td class="label">NK1R</td>
<td>Substance P receptor</td>
</tr>
<tr>
<td class="label">CGRP</td>
<td>Calcitonin gene-related peptide</td>
</tr>
<tr>
<td class="label">TH</td>
<td>Tyrosine hydroxylase</td>
</tr>
<tr>
<td class="label">5-HT3R</td>
<td>Serotonin receptor type 3</td>
</tr>
<tr>
<td class="label">Neurokinin-1</td>
<td>Substance P receptor</td>
</tr>
</table>

Area Postrema Neurons are chemoreceptor trigger zone cells located in the caudal medulla oblongata. They detect emetic substances in the blood and initiate vomiting reflexes.

Area Postrema Neurons

<!-- multi-taxonomy-enrichment --> [@jellinger2018]

<!-- taxonomy-enrichment --> [@cersosimo2020]

Taxonomy & Classification

External Database Links

Area Postrema Neurons

Overview

<table class="infobox infobox-cell">
<tr>
<th class="infobox-header" colspan="2">Area Postrema Neurons</th>
</tr>
<tr>
<td class="label">Database</td>
<td>ID</td>
</tr>
<tr>
<td class="label">Cell Ontology</td>
<td>[CL:0008044](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0008044)</td>
</tr>
<tr>
<td class="label">Taxonomy</td>
<td>ID</td>
</tr>
<tr>
<td class="label">Cell Ontology (CL)</td>
<td>[CL:0008044](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0008044)</td>
</tr>
<tr>
<td class="label">Marker</td>
<td>Function</td>
</tr>
<tr>
<td class="label">NK1R</td>
<td>Substance P receptor</td>
</tr>
<tr>
<td class="label">CGRP</td>
<td>Calcitonin gene-related peptide</td>
</tr>
<tr>
<td class="label">TH</td>
<td>Tyrosine hydroxylase</td>
</tr>
<tr>
<td class="label">5-HT3R</td>
<td>Serotonin receptor type 3</td>
</tr>
<tr>
<td class="label">Neurokinin-1</td>
<td>Substance P receptor</td>
</tr>
</table>

Area Postrema Neurons are chemoreceptor trigger zone cells located in the caudal medulla oblongata. They detect emetic substances in the blood and initiate vomiting reflexes.

Area Postrema Neurons

<!-- multi-taxonomy-enrichment --> [@jellinger2018]

<!-- taxonomy-enrichment --> [@cersosimo2020]

Taxonomy & Classification

External Database Links

• [Cell Ontology (CL:0008044)](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0008044)
• [OBO Foundry (CL:0008044)](http://purl.obolibrary.org/obo/CL_0008044)
• [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:0008044)](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0008044)
• [OBO Foundry (CL:0008044)](http://purl.obolibrary.org/obo/CL_0008044)
• [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/)

Introduction

Area Postrema 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.

Area Postrema neurons are chemoreceptor cells located in the caudal medulla oblongata, at the floor of the fourth ventricle. As part of the circumventricular organs, the Area Postrema lacks a complete blood-brain barrier and detects circulating toxins and hormones, making it critical for nausea/vomiting reflex and with significant implications for neurodegeneration.

Morphology

• Cell Type: Neuronal and glial elements
• Location: Dorsal medulla, caudal to the obex
• Structure: Lacks blood-brain barrier (fenestrated capillaries)
• Connections: Nucleus of the solitary tract (NTS), dorsal motor nucleus of vagus
• Marker Proteins: Tachykinin, CGRP, TH (tyrosine hydroxylase)

Molecular Markers

Normal Function

Chemoreceptor Function

• Toxin Detection: Senses circulating emetic substances
• Vomiting Reflex: Triggers emesis in response to toxins
• Autonomic Integration: Coordinates with NTS and DMNV

Hormonal Sensing

• CCK Detection: Responds to cholecystokinin
• Amine Detection: Serotonin, dopamine
• Immune Signals: Cytokine sensing

Autonomic Control

• Vagal Output: Controls GI motility and secretion
• Cardiovascular: Blood pressure regulation
• Respiratory: Coordination of breathing with vomiting

Disease Vulnerability in Neurodegeneration

Parkinson's Disease

• Early Pathology: Area Postrema affected early in PD
• Lewy Bodies: α-Syn inclusion in AP neurons
• Autonomic Symptoms: Nausea, vomiting in PD
• Research: AP as early biomarker site

Alzheimer's Disease

• Tau Pathology: Early tau deposition in AP
• Autonomic Dysfunction: GI symptoms in AD
• Immune Sensing: Altered cytokine detection

Multiple System Atrophy

• Severe Involvement: Early and severe AP degeneration
• Autonomic Failure: Orthostatic hypotension, vomiting
• Pathology: Neuronal loss, gliosis

ALS

• Respiratory Control: AP involved in breathing regulation
• Dysphagia: Vomiting reflex abnormalities

Transcriptomic Profile

Area Postrema neurons express:

• TAC1 (Tachykinin)
• CALCA (CGRP)
• TH (Tyrosine hydroxylase)
• HTR3A (5-HT3 receptor)
• NK1R (Substance P receptor)
• CCR5 (Cytokine receptors)

Therapeutic Implications

Clinical Applications

Research Directions

• Early Biomarker: AP as PD diagnostic target
• Neural Circuits: AP-NTS-DMNV connections
• Gene Expression: Single-cell profiling of AP neurons

Background

The study of Area Postrema 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

• [Area Postrema - Wikipedia](https://en.wikipedia.org/wiki/Area_postrema)