Neurotensin Receptor 2 Neurons

Neurotensin Receptor 2 Neurons

Introduction

<table class="infobox infobox-cell">
<tr>
<th class="infobox-header" colspan="2">Neurotensin Receptor 2 Neurons</th>
</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>
<tr>
<td class="label">Gene Symbol</td>
<td>NTSR2</td>
</tr>
<tr>
<td class="label">Chromosomal Location</td>
<td>2p16.3</td>
</tr>
<tr>
<td class="label">Protein Name</td>
<td>Neurotensin receptor 2</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>P0DHF6</td>
</tr>
<tr>
<td class="label">Protein Class</td>
<td>G protein-coupled receptor (GPCR), Class A</td>
</tr>
</table>

Neurotensin Receptor 2 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.

Overview

Neurons expressing neurotensin receptor 2 (NTSR2), also known as the neurotensin receptor 2 or NTS2, represent an important population in the central nervous system that mediates the effects of the neuropeptide neurotensin. While less studied than the high-affinity NTS1 receptor, NTSR2 plays crucial roles in stress response, pain modulation, and maintainance of neuronal homeostasis. [@neurotensin2020]

Neurotensin Receptor 2 Neurons

Introduction

<table class="infobox infobox-cell">
<tr>
<th class="infobox-header" colspan="2">Neurotensin Receptor 2 Neurons</th>
</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>
<tr>
<td class="label">Gene Symbol</td>
<td>NTSR2</td>
</tr>
<tr>
<td class="label">Chromosomal Location</td>
<td>2p16.3</td>
</tr>
<tr>
<td class="label">Protein Name</td>
<td>Neurotensin receptor 2</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>P0DHF6</td>
</tr>
<tr>
<td class="label">Protein Class</td>
<td>G protein-coupled receptor (GPCR), Class A</td>
</tr>
</table>

Neurotensin Receptor 2 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.

Overview

Neurons expressing neurotensin receptor 2 (NTSR2), also known as the neurotensin receptor 2 or NTS2, represent an important population in the central nervous system that mediates the effects of the neuropeptide neurotensin. While less studied than the high-affinity NTS1 receptor, NTSR2 plays crucial roles in stress response, pain modulation, and maintainance of neuronal homeostasis. [@neurotensin2020]

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

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/)

Gene and Protein

The NTSR2 gene encodes a 416-amino acid GPCR that shares 64% sequence homology with NTS1. Unlike NTS1, NTSR2 has lower affinity for neurotensin and is primarily coupled to Gi/o proteins.

Structure

NTSR2 possesses the canonical seven transmembrane domain structure:

Key structural features:

• Lacks the proline in TM7 that characterizes NTS1
• Different ligand-binding pocket architecture
• Constitutively active in some cell types

Distribution in the Brain

NTSR2 has a distinct regional distribution:

• Hippocampus: CA1-CA3 pyramidal cells, dentate gyrus granule cells
• Cerebral cortex: Layer 2/3 and layer 5 pyramidal neurons
• Hypothalamus: Supraoptic nucleus, paraventricular nucleus
• Thalamus: Midline and intralaminar nuclei
• Brainstem: Periaqueductal gray, dorsal raphe
• Cerebellum: Purkinje cells, deep cerebellar nuclei
• Olfactory bulb: Mitral and tufted cells

Normal Physiological Functions

Stress Response

NTSR2 neurons mediate key aspects of stress reactivity:

Pain Modulation

NTSR2 contributes to pain processing:

Homeostatic Functions

• Thermoregulation: Fever generation and body temperature control
• Food intake: Modulation of feeding behavior
• Water balance: Osmoregulation
• Cardiovascular control: Blood pressure regulation

Cognitive Functions

• Learning and memory: Hippocampal NTSR2 in memory consolidation
• Synaptic plasticity: LTPmechanisms/long-term-potentiation) and LTD modulation
• Neuroprotection: Trophic effects of neurotensin

Role in Neurodegenerative Diseases

Alzheimer's Disease

Involvement:

• NTSR2 expression altered in AD hippocampus
• Neurotensin levels reduced in AD brain
• Potential neuroprotective role
• Relationship to cholinergic dysfunction

• Modulation of amyloid-beta toxicity
• Influence on tau phosphorylation
• Effects on neuroinflammation

Parkinson's Disease

Involvement:

• NTSR2 in basal ganglia circuits
• Potential for motor symptom modulation
• Relationship to non-motor symptoms
• Stress and mood in PD

Major Depression

Involvement:

• NTSR2 expression changes in depression
• Relationship to stress-diathesis model
• Antidepressant effects of NTSR2 modulation
• Neurotensin as biomarker

• Reduced neurotensin in CSF of depressed patients
• NTSR2 knockout mice show depressive-like behavior
• SSRIs affect NTSR2 expression

Chronic Pain States

Involvement:

• NTSR2 in chronic pain pathophysiology
• Potential analgesic drug target
• Neuropathic pain models show NTSR2 changes
• Relationship to opioid system

Schizophrenia

Involvement:

• NTSR2 in dopaminergic pathways
• Relationship to positive symptoms
• Antipsychotic effects of neurotensin
• Genetic associations

Molecular Interactions

Signaling Pathways

NTSR2 activates multiple intracellular cascades:

Receptor Interactions

• NTS1: Potential cross-talk and heterodimerization
• D2R: Dopamine D2 receptor interactions
• opioid receptors: Functional interactions in pain modulation

Therapeutic Implications

Drug Development

• Analgesic potential
• Anxiolytic effects

• Antidepressant potential
• Applications in stress disorders

Clinical Applications

• Chronic pain: NTSR2 agonists as analgesics
• Depression: NTSR2-targeting antidepressants
• Anxiety disorders: Anxiolytic NTSR2 modulators
• Neurodegeneration: Neuroprotective strategies

Biomarkers

• CSF neurotensin as psychiatric biomarker
• NTSR2 expression in blood cells

Research Directions

Background

The study of Neurotensin Receptor 2 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

• [UniProt: P0DHF6 (NTSR2)](https://www.uniprot.org/uniprot/P0DHF6)
• [NCBI Gene: NTSR2](https://www.ncbi.nlm.nih.gov/gene/23625)
• [PubMed: NTSR2](https://pubmed.ncbi.nlm.nih.gov/?term=NTSR2)
• [IUPHAR: Neurotensin receptors](https://www.guidetopharmacology.org/GRAC/ObjectDetailsForward?familyId=37&objectId=79)