CART Receptor Neurons

CART Receptor Neurons

Introduction

<table class="infobox infobox-cell">
<tr>
<th class="infobox-header" colspan="2">CART Receptor Neurons</th>
</tr>
<tr>
<td class="label">Category</td>
<td>Neuropeptide Receptor Neurons</td>
</tr>
<tr>
<td class="label">Location</td>
<td>Hypothalamus, Amygdala, Nucleus Accumbens, VTA</td>
</tr>
<tr>
<td class="label">Ligands</td>
<td>CART peptides (CART 55-102, CART 61-102)</td>
</tr>
<tr>
<td class="label">Receptor</td>
<td>Multiple (likely GPCR complex)</td>
</tr>
<tr>
<td class="label">Signaling</td>
<td>Gi/o-coupled, inhibits cAMP</td>
</tr>
<tr>
<td class="label">Taxonomy</td>
<td>ID</td>
</tr>
<tr>
<td class="label">Cell Ontology (CL)</td>
<td>[CL:0000197](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0000197)</td>
</tr>
</table>

Cart Receptor Neurons is an important cell type in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

Cocaine- and Amphetamine-Regulated Transcript (CART) peptides are major neurotransmitters involved in energy homeostasis, reward, and neurodegeneration. [@dominguez2010]

Overview

CART Receptor Neurons

Introduction

<table class="infobox infobox-cell">
<tr>
<th class="infobox-header" colspan="2">CART Receptor Neurons</th>
</tr>
<tr>
<td class="label">Category</td>
<td>Neuropeptide Receptor Neurons</td>
</tr>
<tr>
<td class="label">Location</td>
<td>Hypothalamus, Amygdala, Nucleus Accumbens, VTA</td>
</tr>
<tr>
<td class="label">Ligands</td>
<td>CART peptides (CART 55-102, CART 61-102)</td>
</tr>
<tr>
<td class="label">Receptor</td>
<td>Multiple (likely GPCR complex)</td>
</tr>
<tr>
<td class="label">Signaling</td>
<td>Gi/o-coupled, inhibits cAMP</td>
</tr>
<tr>
<td class="label">Taxonomy</td>
<td>ID</td>
</tr>
<tr>
<td class="label">Cell Ontology (CL)</td>
<td>[CL:0000197](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0000197)</td>
</tr>
</table>

Cart Receptor Neurons is an important cell type in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

Cocaine- and Amphetamine-Regulated Transcript (CART) peptides are major neurotransmitters involved in energy homeostasis, reward, and neurodegeneration. [@dominguez2010]

Overview

Multi-Taxonomy Classification

Taxonomy Database Cross-References

External Database Links

• [Cell Ontology (CL:0000197)](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0000197)
• [OBO Foundry (CL:0000197)](http://purl.obolibrary.org/obo/CL_0000197)
• [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/)

Molecular Properties

CART Peptides

• Precursor: CARTPT gene
• Active peptides: CART 55-102, CART 61-102
• Processing: PC1/3 and PC2 mediated
• Distribution: Brain-wide with highest hypothalamic expression

Receptor Characterization

• Identity: Not fully characterized (likely orphan GPCR)
• Candidate receptors: GPR10, GPR87
• Signaling pathways:
• Gi/o → ↓ cAMP
• MAPK activation
• PI3K/Akt pathway

Distribution in Brain

• Hypothalamus: Arcuate nucleus, paraventricular nucleus
• Amygdala: Central nucleus, basolateral complex
• Nucleus accumbens: Shell and core
• VTA: Dopaminergic neurons
• Hippocampus: CA1-CA3 regions

Functions

Energy Homeostasis

• Anorexigenic: Powerful appetite suppression
• Energy expenditure: Increases metabolic rate
• Glucose homeostasis: Modulates insulin signaling
• Body weight: Long-term weight regulation

Reward and Motivation

• Dopamine modulation: Inhibits dopamine release
• Reward processing: Antagonizes cocaine reward
• Addiction: Blocks cocaine and amphetamine effects
• Stress response: Modulates CRF signaling

Neuroprotection

• Anti-apoptotic: Activates pro-survival pathways
• Oxidative stress: Reduces ROS accumulation
• Mitochondrial function: Improves mitochondrial health
• Neuroinflammation: Modulates microglial activation

Clinical Significance in Neurodegeneration

Alzheimer's Disease

• Amyloid toxicity: CART protects against Aβ-induced neuronal death
• Tau pathology: Modulates tau phosphorylation via Akt/GSK3β
• Cholinergic dysfunction: Preserves cholinergic neuron viability
• Cognitive function: Improves learning and memory in preclinical models
• Neuroinflammation: Reduces Aβ-induced inflammatory responses
• Therapeutic potential: CART peptides as neuroprotective agents

Parkinson's Disease

• Dopaminergic protection: Prevents 6-OHDA and MPTP toxicity
• Alpha-synuclein: Modulates aggregation pathways
• Mitochondrial function: Enhances complex I activity
• Motor function: Improvesrotarod performance in models
• Levodopa-induced dyskinesia: May reduce LID severity

Other Neurodegenerative Conditions

• Huntington's Disease: Neuroprotective in Q175/HTT models
• Amyotrophic Lateral Sclerosis (ALS): Modulates excitotoxicity
• Stroke: Reduces ischemic brain injury

Therapeutic Implications

Peptide-Based Therapies

• CART 55-102: Stable analog for CNS delivery
• CART 61-102: Highly bioactive fragment
• Non-peptide analogs: Under development

Target Indications

• Obesity: Appetite suppression (historical)
• Addiction: Cocaine/amphetamine abuse treatment
• Neurodegeneration: AD and PD therapeutic potential
• Metabolic disorders: Type 2 diabetes

Research Compounds

• Anti-CART antibodies: Research tools
• CART receptor agonists: Limited availability

Research Methods

Experimental Approaches

• Knockout mice: CART-/- mice show obesity phenotype
• Viral vectors: AAV-mediated CART overexpression
• Cell culture: Primary neurons, SH-SY5Y cells

Detection

• IHC: CART peptide localization
• ELISA: Tissue and plasma CART levels
• Mass spectrometry: Peptide quantification
• Hypothalamic Neurons
• [Dopaminergic Neurons](/cell-types/dopaminergic-neurons)
• Amygdala Neurons
• Alzheimer's Disease Mechanisms
• Parkinson's Disease Mechanisms

External Links

• [UniProt: CARTPT](https://www.uniprot.org/uniprot/Q9H2P0)
• [GeneCards: CARTPT](https://www.genecards.org/cgi-bin/carddisp.pl?gene=CARTPT)
• [Wikipedia: CART peptide](https://en.wikipedia.org/wiki/Cocaine-_and_amphetamine-regulated_transcript)

Background

The study of Cart Receptor 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.

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 CART Receptor Neurons discovered through SciDEX knowledge graph analysis: