Mast Cells
Introduction
<table class="infobox infobox-cell">
<tr>
<th class="infobox-header" colspan="2">Mast Cells</th>
</tr>
<tr>
<td class="label">Category</td>
<td>Cell Types</td>
</tr>
<tr>
<td class="label">Brain Region</td>
<td>Meninges, Choroid Plexus, Perivascular Space</td>
</tr>
<tr>
<td class="label">Cell Type</td>
<td>Tissue-Resident Innate Immune Cells</td>
</tr>
<tr>
<td class="label">Neurotransmitter</td>
<td>Histamine, Serotonin, Heparin</td>
</tr>
<tr>
<td class="label">Key Markers</td>
<td>Tryptase, Chymase, FcεRI, c-Kit</td>
</tr>
<tr>
<td class="label">Vulnerability</td>
<td>Alzheimer's Disease, Parkinson's Disease, Multiple Sclerosis, Migraine</td>
</tr>
<tr>
<td class="label">Taxonomy</td>
<td>ID</td>
</tr>
<tr>
<td class="label">Cell Ontology (CL)</td>
<td>[CL:0000097](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0000097)</td>
</tr>
<tr>
<td class="label">Database</td>
<td>ID</td>
</tr>
<tr>
<td class="label">Cell Ontology</td>
<td>[CL:0000097](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0000097)</td>
</tr>
<tr>
<td class="label">Gene/Protein</td>
<td>Expression</td>
</tr>
<tr>
<td class="label">KIT</td>
<td>High</td>
</tr>
<tr>
<td class="label">TPSAB1</td>
<td>High</td>
</tr>
<tr>
<td class="label">TPSB2</td>
<td>High</td
...Mast Cells
Introduction
<table class="infobox infobox-cell">
<tr>
<th class="infobox-header" colspan="2">Mast Cells</th>
</tr>
<tr>
<td class="label">Category</td>
<td>Cell Types</td>
</tr>
<tr>
<td class="label">Brain Region</td>
<td>Meninges, Choroid Plexus, Perivascular Space</td>
</tr>
<tr>
<td class="label">Cell Type</td>
<td>Tissue-Resident Innate Immune Cells</td>
</tr>
<tr>
<td class="label">Neurotransmitter</td>
<td>Histamine, Serotonin, Heparin</td>
</tr>
<tr>
<td class="label">Key Markers</td>
<td>Tryptase, Chymase, FcεRI, c-Kit</td>
</tr>
<tr>
<td class="label">Vulnerability</td>
<td>Alzheimer's Disease, Parkinson's Disease, Multiple Sclerosis, Migraine</td>
</tr>
<tr>
<td class="label">Taxonomy</td>
<td>ID</td>
</tr>
<tr>
<td class="label">Cell Ontology (CL)</td>
<td>[CL:0000097](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0000097)</td>
</tr>
<tr>
<td class="label">Database</td>
<td>ID</td>
</tr>
<tr>
<td class="label">Cell Ontology</td>
<td>[CL:0000097](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0000097)</td>
</tr>
<tr>
<td class="label">Gene/Protein</td>
<td>Expression</td>
</tr>
<tr>
<td class="label">KIT</td>
<td>High</td>
</tr>
<tr>
<td class="label">TPSAB1</td>
<td>High</td>
</tr>
<tr>
<td class="label">TPSB2</td>
<td>High</td>
</tr>
<tr>
<td class="label">CPA3</td>
<td>High</td>
</tr>
<tr>
<td class="label">HDC</td>
<td>High</td>
</tr>
<tr>
<td class="label">FCER1A</td>
<td>High</td>
</tr>
<tr>
<td class="label">GATA2</td>
<td>High</td>
</tr>
<tr>
<td class="label">MRGPRX2</td>
<td>Medium</td>
</tr>
<tr>
<td class="label">Gene/Protein</td>
<td>Expression</td>
</tr>
<tr>
<td class="label">KIT</td>
<td>High</td>
</tr>
<tr>
<td class="label">TPSAB1</td>
<td>High</td>
</tr>
<tr>
<td class="label">TPSB2</td>
<td>High</td>
</tr>
<tr>
<td class="label">CPA3</td>
<td>High</td>
</tr>
<tr>
<td class="label">HDC</td>
<td>High</td>
</tr>
<tr>
<td class="label">FCER1A</td>
<td>High</td>
</tr>
<tr>
<td class="label">GATA2</td>
<td>High</td>
</tr>
<tr>
<td class="label">MRGPRX2</td>
<td>Medium</td>
</tr>
</table>
Mast Cells is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
Mast cells are tissue-resident immune cells that play crucial roles in allergy, inflammation, and innate immunity. In the central nervous system, mast cells reside in the meninges, choroid plexus, and perivascular spaces, where they contribute to neuroinflammation, blood-brain barrier regulation, and have been implicated in neurodegenerative diseases including Alzheimer's, Parkinson's, and multiple sclerosis. [@nautiyal2008]
Overview
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Multi-Taxonomy Classification
Taxonomy Database Cross-References
PanglaoDB Marker Cross-References
External Database Links
- [Cell Ontology (CL:0000097)](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0000097)
- [OBO Foundry (CL:0000097)](http://purl.obolibrary.org/obo/CL_0000097)
- [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
External Database Links
- [Cell Ontology (CL:0000097)](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0000097)
- [OBO Foundry (CL:0000097)](http://purl.obolibrary.org/obo/CL_0000097)
- [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/)
Morphology and Markers
Mast cells have distinctive features:
- Granules: Electron-dense cytoplasmic granules containing histamine, heparin, tryptase, chymase
- Receptors: FcεRI (IgE receptor), c-Kit (stem cell factor receptor)
- Size: 10-15 μm diameter
- Shape: Round to ovoid with short villous projections
- Tissue Distribution: Meninges > Choroid Plexus > Perivascular spaces
Key Genes and Proteins
Key Genes and Proteins
Normal Function
CNS mast cells serve important functions:
Allergic Response: IgE-mediated degranulation triggers inflammation
Blood-Brain Barrier: Regulate BBB permeability
Wound Healing: Release VEGF, FGF for angiogenesis
Innate Immunity: Recognize pathogens via TLRs
Neuroimmune Signaling: Communicate with microglia and neuronsDisease Involvement
Alzheimer's Disease
- Amyloid Interaction: Mast cells can internalize Aβ
- Neuroinflammation: Release pro-inflammatory cytokines
- Tau Pathology: Histamine may promote tau phosphorylation
- Therapeutic Target: Antihistamines as potential AD treatment
Parkinson's Disease
- Alpha-Synuclein: Mast cells may interact with α-syn
- Neuroinflammation: Contribute to dopaminergic neuron loss
- Gut-Brain Axis: Gut mast cells may influence PD progression
Multiple Sclerosis
- Demyelination: Mast cell proteases degrade myelin
- Relapse Severity: Mast cell counts correlate with disease activity
- Therapeutic Target: Mast cell stabilizers in MS treatment
Migraine
- CGRP Release: Mast cells release calcitonin gene-related peptide
- Vasodilation: Histamine contributes to migraine aura
- Therapeutic Target: Mast cell inhibitors for migraine prevention
Molecular Mechanisms
Neuroinflammatory Signaling
Mast cells are potent neuroinflammation mediators:
- Tryptase release: Mast cell tryptase activates PAR2 on neurons and astrocytes, triggering inflammatory cascades
- Histamine signaling: Mast cell histamine affects blood-brain barrier permeability
- Cytokine production: Mast cells produce TNF-α, IL-1β, IL-6, and CCL2, recruiting microglia
Oxidative Stress
Mast cells contribute to oxidative stress:
- NADPH oxidase: Mast cell NADPH oxidase produces reactive oxygen species
- Peroxidase activity: Myeloperoxidase generates hypochlorous acid
Blood-Brain Barrier Modulation
Mast cells directly affect BBB integrity:
- Tight junction disruption: MMP-9 and tryptase degrade claudin-5 and occludin
- Endothelial activation: VEGF from mast cells increases vascular permeability
Disease Involvement
Alzheimer's Disease
Mast cells play a role in Alzheimer's disease:
- Amyloid interaction: Mast cells bind amyloid-beta via RAGE receptors
- Neuroinflammation amplification: Mast cells amplify microglial IL-1β and TNF-α production
- Plaque remodeling: Mast cell tryptase can degrade amyloid deposits
Parkinson's Disease
In Parkinson's disease:
- BBB breakdown: Alpha-synuclein oligomers activate mast cells
- Dopaminergic vulnerability: Mast cell histamine promotes dopaminergic neuron death
- Gut-brain axis: Mast cells in the gut respond to alpha-synuclein aggregation
Multiple Sclerosis
Mast cells are implicated in multiple sclerosis:
- Demyelination: Mast cell tryptase damages myelin
- Autoimmune amplification: Mast cells present MOG antigens
Amyotrophic Lateral Sclerosis
Mast cells contribute to ALS:
- Motor neuron inflammation: Mast cells cluster around motor neurons
- Neuromuscular junction: Tryptase at the NMJ promotes axon degeneration
Therapeutic Implications
Drug Targets
- Mast Cell Stabilizers: Cromolyn, ketotifen
- Histamine Receptor Antagonists: H1R, H3R blockers
- Tryptase Inhibitors: Protect against protease effects
- c-Kit Inhibitors: Target mast cell survival
Clinical Applications
- Migraine Prevention: Montelukast, cromolyn
- MS Adjunct Therapy: Cromolyn in clinical trials
- AD Research: Antihistamine epidemiology studies
Background
The study of Mast Cells 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
- [Allen Brain Atlas: Mast Cells](https://mouse.brain-map.org/)
Pathway Diagram
The following diagram shows the key molecular relationships involving Mast Cells discovered through SciDEX knowledge graph analysis:
Mermaid diagram (expand to render)
Pathway Diagram
The following diagram shows the key molecular relationships involving Mast Cells discovered through SciDEX knowledge graph analysis:
Mermaid diagram (expand to render)