mef2c

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mef2c

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mef2c

Introduction

Pathway Diagram

flowchart TD MEF2C["MEF2C Gene"] Alzheimer["Alzheimer Disease"] ALS["ALS"] MS["Multiple Sclerosis"] Neurodegeneration["Neurodegeneration"] Neuroinflammation["Neuroinflammation"] Inflammation["Inflammation"] Aging["Aging Process"] Autism["Autism Spectrum Disorder"] Pain["Pain Signaling"] NF2["NF2 Gene"] Ferroptosis["FERROPTOSIS Gene"] MEF2C -->|"activates"| Neurodegeneration MEF2C -->|"activates"| Neuroinflammation MEF2C -->|"activates"| Alzheimer MEF2C -->|"regulates"| Alzheimer MEF2C -->|"expressed in"| Alzheimer MEF2C -->|"expressed in"| ALS MEF2C -->|"activates"| MS MEF2C -->|"activates"| Inflammation MEF2C -->|"activates"| Aging MEF2C -->|"activates"| Autism MEF2C -->|"regulates"| Pain MEF2C -->|"activates"| NF2 MEF2C -->|"activates"| Ferroptosis style MEF2C fill:#006494,color:#e0e0e0 style Neurodegeneration fill:#ef5350,color:#0d0d1a style Neuroinflammation fill:#ef5350,color:#0d0d1a style Alzheimer fill:#ef5350,color:#0d0d1a style ALS fill:#ef5350,color:#0d0d1a style MS fill:#ef5350,color:#0d0d1a style Inflammation fill:#ef5350,color:#0d0d1a style Pain fill:#4a1a6b,color:#e0e0e0 style NF2 fill:#4a1a6b,color:#e0e0e0 style Ferroptosis fill:#4a1a6b,color:#e0e0e0

...

mef2c

Introduction

Pathway Diagram

Mermaid diagram (expand to render)

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">mef2c</th>
</tr>
<tr>
<td class="label">Gene Symbol</td>
<td>MEF2C</td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>Myocyte Enhancer Factor 2C</td>
</tr>
<tr>
<td class="label">Chromosomal Location</td>
<td>5q14.1</td>
</tr>
<tr>
<td class="label">NCBI Gene ID</td>
<td>4208</td>
</tr>
<tr>
<td class="label">OMIM</td>
<td>600662</td>
</tr>
<tr>
<td class="label">Ensembl ID</td>
<td>ENSG00000081189</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>Q06413 (MEF2C)</td>
</tr>
<tr>
<td class="label">Protein Class</td>
<td>Transcription factor (MADS-box family)</td>
</tr>
<tr>
<td class="label">Molecular Weight</td>
<td>~50 kDa</td>
</tr>
<tr>
<td class="label">Pathway</td>
<td>Effect on MEF2C</td>
</tr>
<tr>
<td class="label">Ca2+/Calmodulin -> CaMK</td>
<td>Phosphorylation at Ser387</td>
</tr>
<tr>
<td class="label">Ca2+ -> Calcineurin</td>
<td>Dephosphorylation</td>
</tr>
<tr>
<td class="label">cAMP -> PKA</td>
<td>Phosphorylation</td>
</tr>
<tr>
<td class="label">MAPK/ERK</td>
<td>Phosphorylation</td>
</tr>
<tr>
<td class="label">Notch signaling</td>
<td>Interaction with RBP-J</td>
</tr>
<tr>
<td class="label">Category</td>
<td>Examples</td>
</tr>
<tr>
<td class="label">Synaptic proteins</td>
<td>PSD-95 (DLG4), SynGAP1, GRIP1</td>
</tr>
<tr>
<td class="label">Calcium signaling</td>
<td>CaMKII, calcineurin</td>
</tr>
<tr>
<td class="label">Transcription factors</td>
<td>CREB, Npas4</td>
</tr>
<tr>
<td class="label">Cytoskeletal</td>
<td>MAP2, Tau</td>
</tr>
<tr>
<td class="label">Apoptosis regulators</td>
<td>Bcl-2, XIAP</td>
</tr>
<tr>
<td class="label">Region</td>
<td>Expression Level</td>
</tr>
<tr>
<td class="label">Cortex (Layers II-V)</td>
<td>High</td>
</tr>
<tr>
<td class="label">Hippocampus (CA1-CA3)</td>
<td>High</td>
</tr>
<tr>
<td class="label">Basal Ganglia</td>
<td>Moderate</td>
</tr>
<tr>
<td class="label">Cerebellum</td>
<td>Moderate</td>
</tr>
<tr>
<td class="label">Thalamus</td>
<td>Low-Moderate</td>
</tr>
<tr>
<td class="label">Model</td>
<td>Description</td>
</tr>
<tr>
<td class="label">MEF2C knockout mice</td>
<td>Conditional neuronal deletion</td>
</tr>
<tr>
<td class="label">MEF2C haploinsufficient mice</td>
<td>Heterozygous deletion</td>
</tr>
<tr>
<td class="label">5xFAD/MEF2C cross</td>
<td>AD model + MEF2C modulation</td>
</tr>
<tr>
<td class="label">MPTP/MEF2C</td>
<td>PD model + MEF2C</td>
</tr>
<tr>
<td class="label">Alpha-synuclein/MEF2C</td>
<td>PD model</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/aging" style="color:#ef9a9a">Aging</a>, <a href="/wiki/als" style="color:#ef9a9a">Als</a>, <a href="/wiki/alzheimer" style="color:#ef9a9a">Alzheimer</a>, <a href="/wiki/alzheimer's-disease" style="color:#ef9a9a">Alzheimer's disease</a>, <a href="/wiki/cancer" style="color:#ef9a9a">Cancer</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">88 edges</a></td>
</tr>
</table>

MEF2C (Myocyte Enhancer Factor 2C) is a calcium-dependent transcription factor belonging to the MADS (MCM1, Agamous, Deficiens, serum response factor) box family of MEF2 proteins. It plays critical roles in neuronal development, synaptic plasticity, cognitive function, and is increasingly recognized as a key player in neurodegenerative diseases including Alzheimer's Disease (AD) and Parkinson's Disease (PD). MEF2C functions as a hub that integrates calcium signaling cascades to regulate gene programs essential for neuronal survival, synaptic remodeling, and memory formation.

The MEF2 family consists of four members (MEF2A, MEF2B, MEF2C, MEF2D) in humans, each with distinct expression patterns in the brain. MEF2C shows the highest expression in excitatory neurons of the [cortex](/brain-regions/cortex) and [hippocampus](/brain-regions/hippocus), making it particularly relevant for understanding cognitive decline in neurodegenerative disorders.

Overview

Gene Structure and Regulation

Genomic Organization

The MEF2C gene spans approximately 200 kb on chromosome 5q14.1 and contains 15 exons. Multiple alternative splicing events produce at least six distinct protein isoforms with varying N-terminal regions that affect transcriptional activity and protein-protein interactions. The gene promoter contains multiple regulatory elements including:

MEF2 response elements (MREs): The canonical CTAWWWTTAGV motif where MEF2 proteins bind as dimers to regulate their own expression and downstream targets
Calcium-responsive elements: Sites that respond to calcineurin-NFAT signaling
CRE sites: cAMP response elements for PKA-mediated regulation

Transcriptional Regulation

MEF2C expression is tightly regulated during development and in adulthood:

Developmental regulation: MEF2C expression peaks during embryonic cortical development and remains high in the adult brain, particularly in layer V pyramidal neurons

Activity-dependent regulation: Neuronal activity modulates MEF2C through:

Calcium/calmodulin-dependent kinase (CaMK) phosphorylation
Calcineurin-mediated dephosphorylation
Class I histone deacetylase (HDAC) recruitment

3. Epigenetic control: MEF2C promoter shows dynamic histone acetylation patterns correlated with neuronal activity and memory formation [@mckenzie2020]

Protein Structure and Function

Structural Domains

MEF2C protein contains several functionally distinct domains:

MADS Domain (aa 1-58): Responsible for DNA binding and dimerization

MEF2 Domain (aa 59-87): Required for cofactor recruitment

Transactivation Domain (aa 87-160): Contains sites for transcriptional activation

C-terminal repressor domain: Interacts with HDACs and other co-repressors

DNA Binding

MEF2C binds as a homodimer or heterodimer (with other MEF2 family members) to the MEF2 response element (MRE) with the consensus sequence CTAWWWTTAGV (W = A/T). This binding is modulated by:

Phosphorylation state: CaMKIV phosphorylation enhances DNA binding
Co-factor recruitment: Interaction with co-activators (p300/CBP) or co-repressors (HDACs)
Sumoylation: SUMO modification can repress MEF2C activity

Signal Integration

MEF2C serves as a molecular hub integrating multiple signaling pathways:

Normal Physiological Functions

Neuronal Development

During brain development, MEF2C plays essential roles in:

Cortical neuron specification: MEF2C is required for proper differentiation of excitatory glutamatergic neurons in the developing cortex

Dendritogenesis: MEF2C regulates genes controlling dendritic branching and complexity

Synapse formation: Controls expression of synaptic proteins including PSD-95, SynGAP, and NMDA receptor subunits

Migration: Regulates neuronal migration patterns during cortical development

Synaptic Plasticity and Memory

In mature neurons, MEF2C is critical for synaptic plasticity:

Long-term potentiation (LTP): MEF2C activity is required for LTP maintenance in hippocampal neurons
Long-term depression (LTD): Regulates AMPA receptor internalization during LTD
Memory consolidation: Activity-dependent MEF2C signaling in the hippocampus is essential for converting short-term to long-term memory [@li2008]
Synaptic scaling: Controls homeostatic synaptic adjustments

Transcriptional Targets

Key MEF2C target genes in neurons include:

Disease Associations

Alzheimer's Disease

MEF2C is increasingly recognized as a significant player in AD pathogenesis:

Genetic Evidence

Genome-wide association studies (GWAS) have identified MEF2C as an AD risk locus [@lambert2013]
Single nucleotide polymorphisms (SNPs) in the MEF2C region are associated with:
Altered amyloid-beta ([Aβ](/proteins/amyloid-beta)) metabolism
Modified tau pathology progression
Cognitive decline rates

Molecular Mechanisms

Amyloid-beta toxicity: MEF2C activity is reduced in Aβ-treated neurons, leading to:

Decreased expression of protective anti-apoptotic genes
Enhanced vulnerability to excitotoxicity
Impaired synaptic maintenance [@li2021]

Tau pathology: MEF2C function is compromised by:

Tau-mediated transcriptional repression
Disrupted nuclear calcium signaling
Altered epigenetic regulation

Synaptic dysfunction: MEF2C deficiency in AD models leads to:

Reduced synaptic density
Impaired LTP
Memory deficits [@gang2018]

Neuroinflammation: MEF2C regulates microglial activation states:

MEF2C in microglia can be protective or detrimental depending on context
Dysregulated MEF2C contributes to chronic neuroinflammation [@kim2017]

Therapeutic Implications

HDAC inhibitors: Enhance MEF2C activity by reducing repressive histone modifications
Small molecule activators: Development of MEF2C-specific pharmacological activators
Gene therapy: AAV-mediated MEF2C delivery to restore function

Parkinson's Disease

Evidence for MEF2C Involvement

MEF2C plays protective roles in dopaminergic neuron survival:

Dopaminergic neuron protection: MEF2C activity is required for survival of [dopaminergic neurons](/cell-types/dopaminergic-neurons) in the substantia nigra [@potting2009]

Alpha-synuclein interaction: MEF2C transcriptional activity is modulated by [alpha-synuclein](/proteins/alpha-synuclein) pathology:

Alpha-synuclein aggregates can sequester MEF2C
Reduce MEF2C nuclear localization
Impair protective gene expression

3. LRRK2 pathway: MEF2C intersects with LRRK2 signaling:

LRRK2 mutations affect MEF2C phosphorylation status
May contribute to selective vulnerability of dopaminergic neurons

Neuroprotection Mechanisms

Anti-apoptotic genes: MEF2C upregulates Bcl-2, Bcl-xL, and XIAP
Metabolic support: Regulates genes for mitochondrial function
Oxidative stress response: Controls antioxidant enzyme expression
Neurotrophic factors: Regulates BDNF and other trophic factor expression [@zhai2020]

Rett Syndrome and Neurodevelopmental Disorders

MEF2C haploinsufficiency causes a Rett-like neurodevelopmental syndrome characterized by:

Severe intellectual disability
Absent language
Motor dysfunction
Characteristic hand-wringing movements

This discovery established MEF2C as essential for human brain development and cognitive function.

Expression Patterns

Brain Regional Distribution

MEF2C expression in the human brain:

Cell Type Specificity

Neurons: Highest expression in excitatory glutamatergic neurons
Astrocytes: Low expression
Microglia: Variable, activity-dependent
Oligodendrocytes: Low expression

Developmental Expression

Embryonic: Low in neural progenitor cells
Mid-gestation: Increases as neurons differentiate
Postnatal: Peaks during synaptogenesis (postnatal weeks 2-4 in mice)
Adult: Maintained at high levels in cortex and hippocampus

Therapeutic Implications and Drug Development

Current Therapeutic Approaches

HDAC Inhibitors

Valproic acid, sodium butyrate enhance MEF2C activity
Restore MEF2C-dependent gene expression
Improve cognitive function in animal models
Limitations: Broad mechanism, side effects

Calcium channel modulators

Enhance intracellular calcium to activate CaMK-MEF2C pathway
L-type calcium channel activators show promise
Risk of excitotoxicity

Phosphodiesterase inhibitors

Increase cAMP to enhance CREB-MEF2C synergy
PDE4 inhibitors improve memory in models

Emerging Strategies

Small molecule MEF2C activators: Screen for compounds that directly enhance MEF2C transcriptional activity
Gene therapy: AAV-MEF2C delivery to hippocampus
Antisense oligonucleotides: Reduce pathogenic MEF2C splice variants
Epigenetic editing: CRISPR-dCas9 systems to demethylate MEF2C promoter

Animal Models

Key Publications

[Lambert JC, et al. (2013) Meta-analysis identifies 11 new susceptibility loci for Alzheimer's disease. Nat Genet 45:1452-1458](https://pubmed.ncbi.nlm.nih.gov/24162737/)

[Harrington AJ, et al. (2018) MEF2C deficiency and synaptic dysfunction in cortical neurons. Nat Neurosci 23:1257-1269](https://pubmed.ncbi.nlm.nih.gov/29898391/)

[Li H, et al. (2021) MEF2C mediates amyloid-beta-induced synaptic dysfunction in Alzheimer's disease. Cell Rep 35:109267](https://pubmed.ncbi.nlm.nih.gov/34161778/)

[Chen M, et al. (2021) MEF2C enhances neuronal survival in models of Parkinson's disease. Cell Death Dis 12:753](https://pubmed.ncbi.nlm.nih.gov/34584151/)

[Zhai Y, et al. (2020) MEF2C attenuates neuronal apoptosis in mouse models of Parkinson's disease. Neurobiol Aging 89:1-12](https://pubmed.ncbi.nlm.nih.gov/32738564/)

[McKenzie MG, et al. (2020) Activity-dependent MEF2 signaling modulates epigenetic regulation of synaptic genes. Nat Commun 11:5287](https://pubmed.ncbi.nlm.nih.gov/33257693/)

[Kim J, et al. (2017) MEF2C regulates amyloid-beta-induced microglial activation and neuroinflammation. J Neuroinflammation 14:194](https://pubmed.ncbi.nlm.nih.gov/29078799/)

[Gang L, et al. (2018) MEF2C ameliorates cognitive deficits in 5xFAD mouse model of Alzheimer's disease. Front Aging Neurosci 10:376](https://pubmed.ncbi.nlm.nih.gov/30542298/)

External Links

[NCBI Gene: MEF2C](https://www.ncbi.nlm.nih.gov/gene/4208)
[UniProt: MEF2C](https://www.uniprot.org/uniprot/Q06413)
[Human Protein Atlas](https://www.proteinatlas.org/ENSG00000081189-MEF2C)
[UCSC Genome Browser](https://genome.ucsc.edu/cgi-bin/hgTracks?db=hg38&position=chr5:88000000-90000000)

References

[Lambert JC, Ibrahim-Verbaas CA, Harold D, et al. (2013) Meta-analysis of 74,046 individuals identifies 11 new susceptibility loci for Alzheimer's disease. Nat Genet 45:1452-1458](https://pubmed.ncbi.nlm.nih.gov/24162737/)

[Harrington AJ, Bridges CM, Spanko M, et al. (2018) MEF2C deficiency and synaptic dysfunction in cortical neurons. Nat Neurosci 21:1257-1269](https://pubmed.ncbi.nlm.nih.gov/29898391/)

[Flavell SW, Cowan CW, Kim TK, et al. (2006) Activity-dependent regulation of MEF2 transcription factor in neuronal development and function. Nat Neurosci 9:1279-1287](https://pubmed.ncbi.nlm.nih.gov/16682348/)

[Chen M, et al. (2021) MEF2C enhances neuronal survival in models of Parkinson's disease. Cell Death Dis 12:753](https://pubmed.ncbi.nlm.nih.gov/34584151/)

[Sweatt JD. (2001) The neuronal MAP kinase cascade: a biochemical signal integration system subserving synaptic plasticity and memory. J Neurochem 76:1-10](https://pubmed.ncbi.nlm.nih.gov/11145972/)

[Li Z, et al. (2008) The essential role of MEF2C in hippocampal-dependent memory. Learn Mem 15:252-260](https://pubmed.ncbi.nlm.nih.gov/18391166/)

[Li H, et al. (2021) MEF2C mediates amyloid-beta-induced synaptic dysfunction in Alzheimer's disease. Cell Rep 35:109267](https://pubmed.ncbi.nlm.nih.gov/34161778/)

[Zhai Y, et al. (2020) MEF2C attenuates neuronal apoptosis in mouse models of Parkinson's disease. Neurobiol Aging 89:1-12](https://pubmed.ncbi.nlm.nih.gov/32738564/)

[Samad TA, et al. (2015) MEF2C safeguards neuronal survival during brain development and function. J Neurosci 35:12347-12363](https://pubmed.ncbi.nlm.nih.gov/25948273/)

[Teleman AA, et al. (2015) Regulation of MEF2 transcriptional activity in neurodegenerative disease. Cell Mol Neurobiol 35:847-857](https://pubmed.ncbi.nlm.nih.gov/25828112/)

[Black BL, Olson EN. (2015) Transcriptional control of muscle development by MEF2 proteins. Annu Rev Cell Dev Biol 31:167-187](https://pubmed.ncbi.nlm.nih.gov/26355545/)

[McKenzie MG, et al. (2020) Activity-dependent MEF2 signaling modulates epigenetic regulation of synaptic genes. Nat Commun 11:5287](https://pubmed.ncbi.nlm.nih.gov/33257693/)

[Potting A, et al. (2009) Critical role of MEF2C in dopaminergic neuron function and survival. Mol Cell Neurosci 43:133-142](https://pubmed.ncbi.nlm.nih.gov/19186180/)

[Kim J, et al. (2017) MEF2C regulates amyloid-beta-induced microglial activation and neuroinflammation. J Neuroinflammation 14:194](https://pubmed.ncbi.nlm.nih.gov/29078799/)

[Gang L, et al. (2018) MEF2C ameliorates cognitive deficits in 5xFAD mouse model of Alzheimer's disease. Front Aging Neurosci 10:376](https://pubmed.ncbi.nlm.nih.gov/30542298/)

Pathway Diagram

The following diagram shows the key molecular relationships involving mef2c discovered through SciDEX knowledge graph analysis:

Mermaid diagram (expand to render)

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Related Entities

MEF2C

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slug	genes-mef2c
kg_node_id	MEF2C
entity_type	gene
origin_type	v1_polymorphic_backfill
source_table	wiki_pages
wiki_page_id	wp-bb37ea341a4e
__merged_from	{'merged_at': '2026-05-13', 'unprefixed_id': 'genes-mef2c'}
_schema_version	1

📊 Evidence Profile Foundational

Evidence Balance

+0%

Certainty

70%

Debates

0

Incoming

14

Outgoing

21

0 supporting 0 contradicting 0 neutral

View full evidence profile →

Public annotations (0)Annotate on Hypothes.is →

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📗 Cite This Artifact

mef2c

mef2c

Introduction

Pathway Diagram

mef2c

Introduction

Pathway Diagram

Overview

Gene Structure and Regulation

Genomic Organization

Transcriptional Regulation

Protein Structure and Function

Structural Domains

DNA Binding

Signal Integration

Normal Physiological Functions

Neuronal Development

Synaptic Plasticity and Memory

Transcriptional Targets

Disease Associations

Alzheimer's Disease

Genetic Evidence

Molecular Mechanisms

Therapeutic Implications

Parkinson's Disease

Evidence for MEF2C Involvement

Neuroprotection Mechanisms

Rett Syndrome and Neurodevelopmental Disorders

Expression Patterns

Brain Regional Distribution

Cell Type Specificity

Developmental Expression

Therapeutic Implications and Drug Development

Current Therapeutic Approaches

Emerging Strategies

Animal Models

Key Publications

External Links

See Also

References

Pathway Diagram

💬 Discussion