Hippocampal CA1 Pyramidal Neurons in Alzheimer's Disease

Hippocampal CA1 Pyramidal Neurons in Alzheimer's Disease

Introduction

<table class="infobox infobox-cell">
<tr>
<th class="infobox-header" colspan="2">Hippocampal CA1 Pyramidal Neurons in Alzheimer's Disease</th>
</tr>
<tr>
<td class="label">Taxonomy</td>
<td>ID</td>
</tr>
<tr>
<td class="label">Cell Ontology (CL)</td>
<td>[CL:0000598](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0000598)</td>
</tr>
<tr>
<td class="label">Database</td>
<td>ID</td>
</tr>
<tr>
<td class="label">Cell Ontology</td>
<td>[CL:0000598](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0000598)</td>
</tr>
<tr>
<td class="label">Cell Ontology</td>
<td>[CL:4023060](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_4023060)</td>
</tr>
</table>

Hippocampal Ca1 Pyramidal Neurons In Alzheimer'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

Hippocampal CA1 Pyramidal Neurons in Alzheimer's Disease

Introduction

<table class="infobox infobox-cell">
<tr>
<th class="infobox-header" colspan="2">Hippocampal CA1 Pyramidal Neurons in Alzheimer's Disease</th>
</tr>
<tr>
<td class="label">Taxonomy</td>
<td>ID</td>
</tr>
<tr>
<td class="label">Cell Ontology (CL)</td>
<td>[CL:0000598](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0000598)</td>
</tr>
<tr>
<td class="label">Database</td>
<td>ID</td>
</tr>
<tr>
<td class="label">Cell Ontology</td>
<td>[CL:0000598](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0000598)</td>
</tr>
<tr>
<td class="label">Cell Ontology</td>
<td>[CL:4023060](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_4023060)</td>
</tr>
</table>

Hippocampal Ca1 Pyramidal Neurons In Alzheimer'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

The CA1 pyramidal neurons of the hippocampus are among the most vulnerable neuronal populations in Alzheimer's disease (AD). These neurons are critical for memory formation and spatial navigation, and their degeneration is a hallmark of AD pathology. [@palop2010]

<!-- taxonomy-enrichment --> [@ballatore2007]

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

Multi-Taxonomy Classification

Taxonomy Database Cross-References

Morphology & Electrophysiology

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

PanglaoDB Marker Cross-References

• Unknown (PanglaoDB):

External Database Links

• [Cell Ontology (CL:0000598)](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0000598)
• [OBO Foundry (CL:0000598)](http://purl.obolibrary.org/obo/CL_0000598)
• [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:0000598)](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0000598)
• [OBO Foundry (CL:0000598)](http://purl.obolibrary.org/obo/CL_0000598)
• [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/)

Vulnerability in Alzheimer's Disease

CA1 pyramidal neurons show early and severe pathology in AD:

• Neurofibrillary tangles: CA1 neurons develop tau pathology early in disease progression
• Synaptic loss: Memory-relevant synapses degenerate before cell death
• Metabolic compromise: Reduced glucose metabolism and mitochondrial dysfunction
• Calcium dysregulation: Excitability changes and calcium homeostasis disruption

Molecular Mechanisms

Tau Pathology

CA1 neurons are particularly susceptible to tau aggregation:

• Hyperphosphorylated tau accumulates in the soma and dendrites
• Neurofibrillary tangle formation correlates with cognitive decline
• Tau spreads trans-synaptically to connected neurons

Synaptic Dysfunction

Key synaptic changes include:

• Loss of dendritic spines on CA1 apical dendrites
• Impaired long-term potentiation (LTP) in CA1
• Disruption of Schaffer collateral inputs
• Reduced NMDA and AMPA receptor function

Calcium Dysregulation

Calcium-related vulnerabilities:

• Elevated resting calcium levels
• Dysregulated calcium-induced calcium release
• Impaired mitochondrial calcium handling
• Activation of calcium-dependent proteases

Clinical Relevance

Memory Impairment

CA1 degeneration directly contributes to:

• Episodic memory deficits (earliest symptom)
• Spatial navigation impairment
• Contextual memory disruption
• Temporal ordering memory problems

Diagnostic Markers

Potential biomarkers include:

• CSF tau levels (reflects neuronal damage)
• Structural MRI (hippocampal atrophy)
• FDG-PET (hypometabolism in CA1)

Therapeutic Targets

Neuroprotective Strategies

Promising interventions:

• Tau aggregation inhibitors
• Calcium channel modulators
• Antioxidant therapies
• Synaptic protective agents

Regenerative Approaches

Research directions:

• Stem cell-derived CA1 neurons
• Gene therapy for tau
• Neurotrophic factor delivery

Background

The study of Hippocampal Ca1 Pyramidal Neurons In Alzheimer'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

• [NIH - Alzheimer's Disease](https://www.nia.nih.gov/health/alzheimers)
• [Alzheimer's Association](https://www.alz.org/)
• [UniProt - Tau Protein](https://www.uniprot.org/uniprot/P10636)tau)
• [OMIM - Alzheimer's Disease](https://www.omim.org/entry/104300)

Pathway Diagram

The following diagram shows the key molecular relationships involving Hippocampal CA1 Pyramidal Neurons in Alzheimer's Disease discovered through SciDEX knowledge graph analysis: