cell_type

MICROGLIA

Entity Detail — Knowledge Graph Node

Understanding Entity Pages

This page aggregates everything SciDEX knows about MICROGLIA: its mechanistic relationships (Knowledge Graph edges), hypotheses targeting it, analyses mentioning it, and supporting scientific papers. The interactive graph below shows its immediate neighbors. All content is AI-synthesized from peer-reviewed literature.

10464Connections
30Hypotheses
5Analyses
50Outgoing
50Incoming
7Experiments
5Debates

Summary

Resident immune cells of the central nervous system. Microglia survey the brain parenchyma, clear debris, prune synapses, and respond to injury. In neurodegenerative diseases, chronic microglial activation drives neuroinflammation through complement cascade and cytokine release.

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🧫 Cell Type Info
Cell TypeMICROGLIA
Also Known AsMicroglial cells, Brain-resident macrophages
DefinitionResident immune cells of the central nervous system derived from yolk sac progenitors
FunctionsImmune surveillance, Synaptic pruning, Phagocytosis, Cytokine production, Debris clearance
Key MarkersIBA1, CD11b, CX3CR1, P2RY12, TMEM119, TREM2
StatesHomeostatic, Disease-associated (DAM), Activated, Phagocytic, Senescent
Key PathwaysTREM2-DAP12 signaling, TLR4-NF-kB, CSF1R signaling, Complement cascade, cGAS-STING
Associated DiseasesAlzheimer's disease, Parkinson's disease, Multiple sclerosis, ALS, Nasu-Hakola disease
DiscoveryFirst described by Pío del Río Hortega in 1919
Linked Hypotheses368 hypotheses

Wiki Pages (1)

Knowledge base pages for this entity

Canonical Page

Microglia Activation Mechanism

mechanism · 3164 words

Pathway Diagram

graph TD
    subgraph Therapeutic["Therapeutic"]
        MICROGLIA["MICROGLIA"] -->|"expressed in"| TREM2["TREM2"]
        TREM2_3["TREM2"] -->|"expressed in"| MICROGLIA["MICROGLIA"]
    end
    subgraph Pathology["Pathology"]
        MICROGLIA["MICROGLIA"] -->|"associated with"| NEUROINFLAMMATION["NEUROINFLAMMATION"]
        MICROGLIA["MICROGLIA"] -->|"associated with"| NEURON["NEURON"]
        MICROGLIA["MICROGLIA"] -->|"associated with"| TNF["TNF"]
        MICROGLIA["MICROGLIA"] -->|"associated with"| SNCA["SNCA"]
        MICROGLIA["MICROGLIA"] -->|"associated with"| TAU["TAU"]
        MICROGLIA["MICROGLIA"] -->|"associated with"| TREM2_1["TREM2"]
        MICROGLIA["MICROGLIA"] -->|"associated with"| NEURODEGENERATION["NEURODEGENERATION"]
        AMYLOID["AMYLOID"] -->|"associated with"| MICROGLIA["MICROGLIA"]
        APOE["APOE"] -->|"associated with"| MICROGLIA["MICROGLIA"]
    end
    subgraph Signaling["Signaling"]
        MICROGLIA["MICROGLIA"] -->|"activates"| TREM2_2["TREM2"]
        INFLAMMATION["INFLAMMATION"] -->|"activates"| MICROGLIA["MICROGLIA"]
        C1Q["C1Q"] -->|"activates"| MICROGLIA["MICROGLIA"]
        TREM2_4["TREM2"] -->|"regulates"| MICROGLIA["MICROGLIA"]
    end
    style MICROGLIA fill:#006494,stroke:#4fc3f7,stroke-width:3px,color:#e0e0e0,font-weight:bold
    style TREM2 fill:#006494,stroke:#4fc3f7,stroke-width:1px,color:#e0e0e0
    style NEUROINFLAMMATION fill:#4a1a6b,stroke:#4fc3f7,stroke-width:1px,color:#e0e0e0
    style NEURON fill:#4a1a6b,stroke:#4fc3f7,stroke-width:1px,color:#e0e0e0
    style TNF fill:#4a1a6b,stroke:#4fc3f7,stroke-width:1px,color:#e0e0e0
    style SNCA fill:#4a1a6b,stroke:#4fc3f7,stroke-width:1px,color:#e0e0e0
    style TAU fill:#4a1a6b,stroke:#4fc3f7,stroke-width:1px,color:#e0e0e0
    style TREM2_1 fill:#4a1a6b,stroke:#4fc3f7,stroke-width:1px,color:#e0e0e0
    style TREM2_2 fill:#4a1a6b,stroke:#4fc3f7,stroke-width:1px,color:#e0e0e0
    style NEURODEGENERATION fill:#4a1a6b,stroke:#4fc3f7,stroke-width:1px,color:#e0e0e0
    style INFLAMMATION fill:#5d4400,stroke:#4fc3f7,stroke-width:1px,color:#e0e0e0
    style TREM2_3 fill:#4a1a6b,stroke:#4fc3f7,stroke-width:1px,color:#e0e0e0
    style C1Q fill:#006494,stroke:#4fc3f7,stroke-width:1px,color:#e0e0e0
    style TREM2_4 fill:#006494,stroke:#4fc3f7,stroke-width:1px,color:#e0e0e0
    style AMYLOID fill:#4a1a6b,stroke:#4fc3f7,stroke-width:1px,color:#e0e0e0
    style APOE fill:#4a1a6b,stroke:#4fc3f7,stroke-width:1px,color:#e0e0e0

Outgoing (4663)

TargetRelationTypeStr
Blood-Brain Barriertherapeutic_targetpathway1.00
Alsexpressed_indisease1.00
Immune Responseactivatespathway1.00
Neurodegenerationinhibitsdisease1.00
Blood-Brain Barrieractivatespathway1.00

Incoming (5801)

SourceRelationTypeStr
AMYLOIDinhibitsgene1.00
INFLAMMATIONinhibitsgene1.00
MITOCHONDRIAL DYSFUNCTIONactivatesgene1.00
STROKEactivatesgene1.00
AMYLOIDactivatesgene1.00

Targeting Hypotheses (30)

Hypotheses where this entity is a therapeutic target

HypothesisScoreDiseaseAnalysis
SCFA Deficiency Disrupts Microglial Homeostasis and Promotes 5.500 neurodegeneration Gut-Brain Axis in Parkinson's Disease: M
TREM2-Dependent Astrocyte-Microglia Cross-talk in Neurodegen 0.990 neurodegeneration Gene expression changes in aging mouse b
TREM2-Dependent Microglial Senescence Transition 0.950 neurodegeneration Gene expression changes in aging mouse b
PLCG2 Allosteric Modulation as a Precision Therapeutic for T 0.941 neurodegeneration TREM2 agonism vs antagonism in DAM micro
CYP46A1 Gene Therapy for Age-Related TREM2-Mediated Microgli 0.921 neurodegeneration Lipid raft composition changes in synapt
TREM2-ASM Crosstalk in Microglial Lysosomal Senescence 0.910 neurodegeneration Gene expression changes in aging mouse b
TREM2-Mediated Astrocyte-Microglia Cross-Talk in Neurodegene 0.907 neurodegeneration Gene expression changes in aging mouse b
CSF1R Inhibition-Mediated Microglial Replacement as a State 0.898 neurodegeneration How do different microglial subtypes (DA
SIRT1-Mediated Reversal of TREM2-Dependent Microglial Senesc 0.895 neurodegeneration Gene expression changes in aging mouse b
TREM2-Mediated Astrocyte-Microglia Crosstalk in Neurodegener 0.892 neurodegeneration Gene expression changes in aging mouse b
H1: TREM2 Agonism to Redirect APOE4-Enhanced Microglia from 0.887 neurodegeneration How does APOE4's beneficial immune funct
TREM2-Mediated Astrocyte-Microglia Cross-Talk in Neurodegene 0.880 neurodegeneration Gene expression changes in aging mouse b
Optimized Temporal Window for Metabolic Boosting Therapy Det 0.879 neurodegeneration How do different microglial subtypes (DA
TREM2-Mediated Astrocyte-Microglia Cross-Talk in Neurodegene 0.875 neurodegeneration Gene expression changes in aging mouse b
TREM2-Mediated Cholesterol Dysregulation in Microglial Senes 0.869 neurodegeneration Gene expression changes in aging mouse b
Microglial Senescence Prevention via TREM2/SASP Axis 0.847 neurodegeneration View
ACSL4-Driven Ferroptotic Priming in Disease-Associated Micro 0.847 Alzheimer's Disease Cell type vulnerability in Alzheimers Di
miR-155/Interferon-gamma Feedback Loop as a Reversible Molec 0.843 neurodegeneration How do different microglial subtypes (DA
Microglial AIM2 Inflammasome as the Primary Driver of TDP-43 0.824 neurodegeneration What are the mechanisms by which gut mic
TREM2-Mediated Microglial Dysfunction Disrupts Perivascular 0.812 neuroscience Circuit-level neural dynamics in neurode
CSF1R-TREM2 Co-Agonism for Sustained Microglial Expansion 0.808 neurodegeneration TREM2 agonism vs antagonism in DAM micro
IL-6 Trans-Signaling Blockade at the Oligodendrocyte-Microgl 0.806 neuroinflammation How do oligodendrocytes initiate neuroin
Prime Editing Precision Correction of APOE4 to APOE3 in Micr 0.803 neurodegeneration CRISPR-based therapeutic approaches for
40 Hz Gamma Entrainment Gates ACSL4-Mediated Ferroptotic Pri 0.801 Alzheimer's Disease Cell type vulnerability in Alzheimers Di
TREM2 Deficiency Drives Microglial Senescence via Lipid Meta 0.800 neurodegeneration What molecular mechanisms drive microgli
Microglial TREM2-SYK Pathway Enhancement 0.798 neurodegeneration Cell type vulnerability in Alzheimers Di
SASP-Driven Microglial Metabolic Reprogramming in Synaptic P 0.796 neurodegeneration Senolytic therapy for age-related neurod
Microglial-Mediated Tau Clearance Dysfunction via TREM2 Sign 0.792 neuroscience Circuit-level neural dynamics in neurode
Senescent Microglia Resolution via Maresins-Senolytics Combi 0.784 neurodegeneration Neuroinflammation resolution mechanisms
TREM2-mediated microglial tau clearance enhancement 0.780 neurodegeneration Tau propagation mechanisms and therapeut

Mentioning Analyses (5)

Scientific analyses that reference this entity

How does SPI1 transcriptionally regulate C1QA and C1QC expression in atheroscler

neuroinflammation | 2026-04-08 | 0 hypotheses

Which cell types show the most significant expression changes for neurodegenerat

neurodegeneration | 2026-04-03 | 7 hypotheses Top: 0.682

Cell type vulnerability in Alzheimers Disease (SEA-AD transcriptomic data)

neurodegeneration | 2026-04-03 | 18 hypotheses Top: 0.847

Synaptic pruning by microglia in neurodegeneration

neurodegeneration | 2026-04-02 | 7 hypotheses Top: 0.720

Protein aggregation cross-seeding across neurodegenerative diseases

neurodegeneration | 2026-04-01 | 7 hypotheses Top: 0.639

Experiments (7)

Experimental studies targeting or related to this entity

ExperimentTypeDiseaseScoreFeasibilityModelStatusEst. Cost
TREM2 KO amyloid pathology study validation Alzheimers Disease 0.800 0.00 Mouse (5xFAD/TREM2-/-) completed N/A
TREM2 KO amyloid pathology study validation Alzheimers Disease 0.800 0.00 Mouse (5xFAD/TREM2-/-) completed N/A
TREM2 KO amyloid pathology study validation Alzheimers Disease 0.800 0.00 Mouse (5xFAD/TREM2-/-) in_progress N/A
TREM2 KO amyloid pathology study validation Alzheimers Disease 0.800 0.00 Mouse (5xFAD/TREM2-/-) completed N/A
TREM2 KO amyloid pathology study validation Alzheimers Disease 0.800 0.00 Mouse (5xFAD/TREM2-/-) completed N/A
E2F coordination of G2/M transcriptional program exploratory 0.750 0.00 endocycling mammalian cells proposed N/A
TREM2 KO amyloid pathology study validation Alzheimers Disease 0.200 0.00 Mouse (5xFAD/TREM2-/-) in_progress N/A

Related Papers (20)

Scientific publications cited in analyses involving this entity

Title & PMIDAuthorsJournalYearCitations
Microglia-Mediated Neuroinflammation: A Potential Target for the Treatment of Ca [PMID:35642214] Wang M, Pan W, Xu Y, Zhang J, Wan J, Jia J Inflamm Res 2022 1
TREM2, microglia, and Alzheimer's disease. [PMID:33516818] Qin Q, Teng Z, Liu C, Li Q, Yin Y, Tang Mech Ageing Dev 2021 1
Human and mouse single-nucleus transcriptomics reveal TREM2-dependent and TREM2- [PMID:31932797] Zhou Y, Song WM, Andhey PS, Swain A, Lev Nat Med 2020 1
TREM2 Maintains Microglial Metabolic Fitness in Alzheimer's Disease. [PMID:28802038] Ulland TK, Song WM, Huang SC, Ulrich JD, Cell 2017 1
The TREM2-APOE Pathway Drives the Transcriptional Phenotype of Dysfunctional Mic [PMID:28930663] Krasemann S, Madore C, Cialic R, Baufeld Immunity 2017 1
Precision Neurodegeneration: Integrating Molecular Mechanisms, Biomarkers, and T [PMID:41833042] ["Lyu G", "Li D"] CNS & neurological disorders d 2026 0
Emerging pathological mechanisms of Alzheimer's disease pathogenesis: from neuro [PMID:41858793] ["Wang R", "Feng Y", "Zhou Z", "Jiang J" Frontiers in aging neuroscienc 2026 0
Human CSF proteogenomics links genetic variation to neurodegenerative disease pr [PMID:41757182] ["Puerta R", "Garc\u00eda-Gonz\u00e1lez medRxiv : the preprint server 2026 0
PLCG2 signaling and genetic resilience in Alzheimer's disease. [PMID:41888907] Tsai AP, Martin AK, Mi A, Yeh AE, Ramire Molecular neurodegeneration 2026 0
PLCG2 signaling and genetic resilience in Alzheimer's disease. [PMID:41888907] Tsai AP, Martin AK, Mi A, Yeh AE, Ramire Mol Neurodegener 2026 0
TREM2 deficiency delays postnatal microglial maturation and synaptic pruning, le [PMID:41930604] Yang HC, Deng YS, Zhang J, Zhang T, Song J Alzheimers Dis 2026 0
Investigating the Potential of Gene Editing Technologies in Enhancing Stem Cell [PMID:41926312] ["Mehrabadi S"] Current aging science 2026 0
TREM2 in neurodegeneration and diseases. [PMID:41792456] ["Abdulkhaliq A", "Alasiri G", "Kim B", Molecular psychiatry 2026 0
Berbamine hydrochloride as a brain penetrant galectin 3 inhibitor in a model of [PMID:41772384] ["Siew J", "Lee C", "Chen H", "Lin H", " Brain : a journal of neurology 2026 0
The microglial TREM2 receptor programs hippocampal development in a mouse model [PMID:41887542] Ahmed S, Bowers C, Munoz-Martin J, Jamwa Brain, behavior, and immunity 2026 0
Molecular mechanism of Alzheimer's disease using integrated multi-omics. [PMID:41907842] Alhusaini M, Mussa BM, Ilce BY, Alhaj H, Frontiers in aging neuroscienc 2026 0
Oligodendrocyte precursor cells-microglia crosstalk via BMP4 drives microglial n [PMID:41881962] Baek S, Jang J, Yeo S, Jung HJ, Choe Y Signal transduction and target 2026 0
Phagocytes as plaque catalysts: Human macrophages generate seeding-competent Aβ4 [PMID:41770935] ["Konstantoulea K", "Ramakers M", "Borri Proceedings of the National Ac 2026 0
Microglia, Trem2, and Neurodegeneration. [PMID:38769824] Shi Q, Gutierrez RA, Bhat MA Neuroscientist 2025 0
Microglia, Trem2, and Neurodegeneration. [PMID:38769824] Shi Q, Gutierrez RA, Bhat MA The Neuroscientist : a review 2025 0

Debates (5)

Multi-agent debates referencing this entity

What is the role of microglial synaptic pruning in Alzheimer's disease and other

closed · Rounds: 4 · Score: 0.68 · 2026-04-22

The authors identify SPI1 as a potential transcription factor regulating the hub

closed · Rounds: 4 · Score: 0.93 · 2026-04-09

The debate mentioned gene expression profiling but did not specify which neural

closed · Rounds: 4 · Score: 0.93 · 2026-04-03

What cell types are most vulnerable in Alzheimers Disease based on SEA-AD transc

closed · Rounds: 4 · Score: 0.90 · 2026-04-03

What are the mechanisms underlying protein aggregation cross-seeding across neur

closed · Rounds: 4 · Score: 0.95 · 2026-04-01

Related Research

Hypotheses and analyses mentioning MICROGLIA in their description or question text

TREM2-ASM Crosstalk in Microglial Lysosomal Senescence

Score: 0.910 · neurodegeneration · 2026-04-12

## Mechanistic Overview TREM2-ASM Crosstalk in Microglial Lysosomal Senescence starts from the claim that modulating SMP

TREM2-Mediated Astrocyte-Microglia Cross-Talk in Neurodegeneration

Score: 0.907 · neurodegeneration · 2026-04-12

## Mechanistic Overview TREM2-Mediated Astrocyte-Microglia Cross-Talk in Neurodegeneration starts from the claim that mo

CSF1R Inhibition-Mediated Microglial Replacement as a State Transition Reset

Score: 0.898 · neurodegeneration · 2026-04-16

## Mechanistic Overview CSF1R Inhibition-Mediated Microglial Replacement as a State Transition Reset starts from the cla

SIRT1-Mediated Reversal of TREM2-Dependent Microglial Senescence

Score: 0.895 · neurodegeneration · 2026-04-12

## Mechanistic Overview SIRT1-Mediated Reversal of TREM2-Dependent Microglial Senescence starts from the claim that modu

TREM2-Mediated Astrocyte-Microglia Crosstalk in Neurodegeneration

Score: 0.892 · neurodegeneration · 2026-04-07

## Mechanistic Overview TREM2-Mediated Astrocyte-Microglia Crosstalk in Neurodegeneration starts from the claim that mod

H1: TREM2 Agonism to Redirect APOE4-Enhanced Microglia from Synapse Pruning to A

Score: 0.887 · neurodegeneration · 2026-04-14

## Mechanistic Overview H1: TREM2 Agonism to Redirect APOE4-Enhanced Microglia from Synapse Pruning to Amyloid Clearance

TREM2-Mediated Astrocyte-Microglia Cross-Talk in Neurodegeneration

Score: 0.880 · neurodegeneration · 2026-04-07

## **Molecular Mechanism and Rationale** The triggering receptor expressed on myeloid cells 2 (TREM2) serves as a criti

Optimized Temporal Window for Metabolic Boosting Therapy Determines Success of M

Score: 0.879 · neurodegeneration · 2026-04-16

## Mechanistic Overview Optimized Temporal Window for Metabolic Boosting Therapy Determines Success of Microglial State

TREM2-Mediated Astrocyte-Microglia Cross-Talk in Neurodegeneration

Score: 0.875 · neurodegeneration · 2026-04-07

**Molecular Mechanism and Rationale** The TREM2-mediated astrocyte-microglia cross-talk mechanism represents a complex

TREM2-Mediated Cholesterol Dysregulation in Microglial Senescence

Score: 0.869 · neurodegeneration · 2026-04-07

## Mechanistic Overview TREM2-Mediated Cholesterol Dysregulation in Microglial Senescence starts from the claim that mod

Microglial Senescence Prevention via TREM2/SASP Axis

Score: 0.847 · neurodegeneration · 2026-04-17

## Mechanistic Overview Microglial Senescence Prevention via TREM2/SASP Axis starts from the claim that modulating not y

ACSL4-Driven Ferroptotic Priming in Disease-Associated Microglia

Score: 0.847 · Alzheimer's Disease · 2026-04-02

## Mechanistic Overview ACSL4-Driven Ferroptotic Priming in Disease-Associated Microglia starts from the claim that modu

miR-155/Interferon-gamma Feedback Loop as a Reversible Molecular Switch for Prot

Score: 0.843 · neurodegeneration · 2026-04-16

## Mechanistic Overview miR-155/Interferon-gamma Feedback Loop as a Reversible Molecular Switch for Protective Microglia

Microglial AIM2 Inflammasome as the Primary Driver of TDP-43 Proteinopathy Neuro

Score: 0.824 · neurodegeneration · 2026-04-05

## Mechanistic Overview Microglial AIM2 Inflammasome as the Primary Driver of TDP-43 Proteinopathy Neuroinflammation in

TREM2-Mediated Microglial Dysfunction Disrupts Perivascular Tau Clearance

Score: 0.812 · neuroscience · 2026-04-12

## Mechanistic Overview TREM2-Mediated Microglial Dysfunction Disrupts Perivascular Tau Clearance starts from the claim