Overview

flowchart TD
    ELAVL4["ELAVL4"] -->|"activates"| Dementia["Dementia"]
    ELAVL4["ELAVL4"] -->|"activates"| Neurodegeneration["Neurodegeneration"]
    ELAVL4["ELAVL4"] -->|"activates"| Als["Als"]
    ELAVL4["ELAVL4"] -->|"activates"| Ms["Ms"]
    ELAVL4["ELAVL4"] -->|"activates"| Amyotrophic_Lateral_Sclerosis["Amyotrophic Lateral Sclerosis"]
    ELAVL4["ELAVL4"] -->|"activates"| Frontotemporal_Dementia["Frontotemporal Dementia"]
    ELAVL4["ELAVL4"] -->|"activates"| MAPT["MAPT"]
    ELAVL4["ELAVL4"] -->|"regulates"| MAPT["MAPT"]
    ELAVL4["ELAVL4"] -->|"activates"| TAU["TAU"]
    ELAVL4["ELAVL4"] -->|"participates in"| glutamate_signaling["glutamate signaling"]
    ELAVL4["ELAVL4"] -->|"associated with"| frontotemporal["frontotemporal"]
    ELAVL4["ELAVL4"] -->|"associated with"| neurodegeneration["neurodegeneration"]
    ELAVL4["ELAVL4"] -->|"activates"| Autophagy["Autophagy"]
    ELAVL4["ELAVL4"] -->|"activates"| PIKFYVE["PIKFYVE"]
    style ELAVL4 fill:#4fc3f7,stroke:#333,color:#000

ELAVL4 is a gene/protein that plays a critical role in neurodegenerative disease. It is located on chromosome 1p31.3 and catalogued as NCBI Gene ID 1992.

ELAVL4 (HuD) is an RNA-binding protein essential for neuronal development and function. It is implicated in ALS and neurodegenerative diseases. ^{1**Synaptic Plasticity**: Through regulation of synaptic protein expression, ELAVL4 contributes to long-term potentiation (LTP) and memory formation. Studies show that ELAVL4 knockout mice exhibit deficits in spatial memory and synaptic plasticitySynaptic Plasticity}

--- ^{2**Neuronal Development**: ELAVL4 is essential for neuronal differentiation and survival. It promotes expression of genes involved in neurogenesis, axon guidance, and synapse formationNeuronal Development}

ELAVL4 — ELAV-Like Protein 4

Introduction

Elavl4 Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes. ^{3**Axonal mRNA Transport**: ELAVL4 facilitates transport of target mRNAs along axons to distal synaptic terminals, where local translation occurs. This is critical for synaptic maintenance and plasticityAxonal mRNA Transport}

Function

ELAVL4 encodes ELAV-like protein 4 (also known as HU antigen D), a neuron-specific RNA-binding protein. Like other ELAVL family members, ELAVL4 regulates mRNA stability, splicing, and translation. It is particularly important for neuronal differentiation, synaptic plasticity, and has been implicated in various neurodegenerative diseases.

Expression

Neuron-specific expression with high levels in hippocampus, cortex, and cerebellum. Important for maintaining neuronal identity.

Disease Associations

Key Publications

1. 29023080: ELAVL4 in AD. Nat Neurosci, 2017.

2. 30150353: ELAVL4 neuronal function. J Neurosci, 2018.

See Also

• Alzheimer’s Disease

• Parkinson’s Disease

• RNA Metabolism Dysregulation

Background

The study of Elavl4 Gene 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

• PubMed - Biomedical literature

• Alzheimer’s Disease Neuroimaging Initiative - Research data

• Allen Brain Atlas - Brain gene expression data

Molecular Function and Mechanism

ELAVL4 (also known as HuD) is a member of the ELAV-like family of RNA-binding proteins that includes ELAVL1 (HuR), ELAVL2 (HuB), ELAVL3 (HuC), and ELAVL4 (HuD). These proteins are characterized by their ability to bind to adenine-uridine-rich elements (AU-rich elements, AREs) in the 3’ untranslated regions (3’UTRs) of target mRNAs, thereby regulating mRNA stability, localization, and translation.

In neurons, ELAVL4 plays several critical functions:

^{8**mRNA Stabilization**: ELAVL4 binds to AREs in neuronal mRNAs, protecting them from degradation and extending their half-life. Target mRNAs include those encoding synaptic proteins (synapsin I, GAP-43, tau), transcription factors (c-Fos, N-myc), and proteins involved in neuronal differentiationmRNA Stabilization}: mRNA Stabilization: ELAVL4 binds to AREs in neuronal mRNAs, protecting them from degradation and extending their half-life. Target mRNAs include those encoding synaptic proteins (synapsin I, GAP-43, tau), transcription factors (c-Fos, N-myc), and proteins involved in neuronal differentiation.

^{1**Synaptic Plasticity**: Through regulation of synaptic protein expression, ELAVL4 contributes to long-term potentiation (LTP) and memory formation. Studies show that ELAVL4 knockout mice exhibit deficits in spatial memory and synaptic plasticitySynaptic Plasticity}: Synaptic Plasticity: Through regulation of synaptic protein expression, ELAVL4 contributes to long-term potentiation (LTP) and memory formation. Studies show that ELAVL4 knockout mice exhibit deficits in spatial memory and synaptic plasticity.

^{2**Neuronal Development**: ELAVL4 is essential for neuronal differentiation and survival. It promotes expression of genes involved in neurogenesis, axon guidance, and synapse formationNeuronal Development}: Neuronal Development: ELAVL4 is essential for neuronal differentiation and survival. It promotes expression of genes involved in neurogenesis, axon guidance, and synapse formation.

^{2**Neuronal Development**: ELAVL4 is essential for neuronal differentiation and survival. It promotes expression of genes involved in neurogenesis, axon guidance, and synapse formationNeuronal Development}0: Axonal mRNA Transport: ELAVL4 facilitates transport of target mRNAs along axons to distal synaptic terminals, where local translation occurs. This is critical for synaptic maintenance and plasticity.

Expression Pattern

ELAVL4 is predominantly expressed in neurons of the central and peripheral nervous systems. High expression is observed in:

• Cerebral cortex (layer V pyramidal neurons)

• Hippocampus (CA1-CA3 pyramidal cells, dentate gyrus granule cells)

• Cerebellum (Purkinje cells)

• Dorsal root ganglia

• Spinal cord motor neurons

During development, ELAVL4 expression increases during neuronal differentiation and peaks in the adult brain, indicating its importance in mature neuronal function.

Disease Associations

Amyotrophic Lateral Sclerosis (ALS)

ELAVL4 is genetically and functionally linked to ALS pathogenesis:

• Genetic Variants: Rare missense mutations in ELAVL4 have been identified in ALS patients. These mutations may impair RNA binding or protein-protein interactions.

• RNA Dysregulation: Loss of ELAVL4 function leads to decreased stability of neuronal mRNAs, particularly those encoding synaptic proteins and survival factors.

• Stress Granules: ELAVL4 localizes to stress granules in response to cellular stress. Dysregulated stress granule dynamics are a hallmark of ALS.

• TDP-43 Pathology: ELAVL4 interacts with TDP-43 (encoded by TARDBP), a protein that forms inclusions in nearly all ALS cases. Disruption of this interaction may contribute to disease progression.

Parkinson’s Disease

ELAVL4 may contribute to PD pathogenesis through several mechanisms:

• Regulation of dopaminergic neuron survival genes

• Response to oxidative stress in substantia nigra neurons

• Potential interaction with alpha-synuclein mRNA

Alzheimer’s Disease

Evidence suggests ELAVL4 involvement in AD:

• Regulates expression of amyloid precursor protein (APP) and tau mRNAs

• Dysregulated in AD brain tissue

• May influence neuroplasticity deficits observed in AD

Therapeutic Implications

ELAVL4 represents a potential therapeutic target for neurodegenerative diseases:

Interactions and Pathway Overview

ELAVL4 participates in several key pathways:

• **RNA- Synaptic Transmission: Regulates expression of synaptic vesicle proteins, neurotransmitter receptors

• Cell Survival: Controls expression of anti-apoptotic proteins (Bcl-2, XIAP)

• Transcription Regulation: Interacts with transcription factors to modulate gene expression

Key protein interactions include:

• TDP-43 (TARDBP)

• FUS (Fused in Sarcoma)

• Ataxin-2 (ATXN2)

• Fragile X mental retardation protein (FMRP)

See Also

• ELAVL4 Protein

• ALS Genetics

• Parkinson’s Disease Genetics

• RNA Binding Proteins in Neurodegeneration

• TDP-43 Pathway

• Stress Granules in Neurodegeneration