Cfl1 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.
| Gene Symbol | CFL1 |
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| Full Name | Cofilin 1 |
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| Chromosomal Location | 14q24.1 |
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| NCBI Gene ID | 1072 |
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| OMIM | 601243 |
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| Ensembl ID | ENSG00000132716 |
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| UniProt ID | P23528 |
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| Associated Diseases | Alzheimer's Disease, Parkinson's Disease, Amyotrophic Lateral Sclerosis, Stroke |
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CFL1 (Cofilin 1) encodes a member of the actin-depolymerizing factor/cofilin family, which plays a critical role in regulating actin cytoskeleton dynamics. This protein is essential for neuronal development, synaptic plasticity, and axonal transport. Dysregulation of CFL1 has been implicated in multiple neurodegenerative diseases.
Cofilin 1 is a small actin-binding protein (19 kDa) that promotes the disassembly and reassembly of actin filaments. It plays key roles in:
- Actin Filament Turnover: Cofilin binds to aged or ADP-actin subunits within filaments, promoting their depolymerization and enabling rapid actin dynamics essential for cellular motility, endocytosis, and cytokinesis.
- Neuronal Morphogenesis: In neurons, cofilin regulates actin dynamics in growth cones, dendritic spines, and axonal branches, influencing neuronal migration, axon guidance, and synapse formation.
- Synaptic Plasticity: Activity-dependent actin remodeling at synaptic sites is critical for long-term potentiation (LTP) and long-term depression (LTD). Cofilin-mediated actin cycling regulates spine morphology and synaptic strength.
- Axonal Transport: The actin cytoskeleton provides tracks for myosin-based transport in regions where microtubules are sparse. Cofilin regulates this process in axons and dendrites.
- Nuclear Functions: Cofilin can translocate to the nucleus where it may regulate gene expression and chromatin remodeling.
- Aβ oligomers induce cofilin activation and actin cytoskeleton disruption in neurons
- Cofilin rod formation (actin-cofilin rods) is observed in AD brain tissue
- Dysregulated cofilin signaling contributes to synaptic loss and dendritic spine degeneration
- Cofilin activation links to mitochondrial dysfunction and oxidative stress in AD
- α-Synuclein aggregates sequester cofilin, disrupting actin dynamics
- Cofilin dysregulation contributes to dopaminergic neuron vulnerability
- Impaired actin-based transport affects mitochondrial function and autophagy
- LRRK2 mutations may affect cofilin phosphorylation status
- TDP-43 proteinopathy disrupts cofilin signaling pathways
- Mutant SOD1 affects actin cytoskeleton in motor neurons
- Cofilin rod formation observed in ALS models and patient tissue
- Impaired axonal transport contributes to motor neuron degeneration
¶ Stroke and Brain Injury
- Ischemic stroke rapidly activates cofilin signaling
- Cofilin-mediated actin disassembly contributes to excitotoxic cell death
- Cofilin rods form in response to oxygen-glucose deprivation
- Targeting cofilin may provide neuroprotective strategies
Cofilin 1 is ubiquitously expressed with highest levels in:
In the brain, CFL1 is expressed in:
- Pyramidal neurons (cortical layer 2/3, CA1-CA3)
- Dentate gyrus granule cells
- Cerebellar Purkinje cells
- Astrocytes and microglia
- Actin-Stabilizing Drugs: Jasplakinolide and latrunculin derivatives are being explored to stabilize actin filaments
- Cofilin Modulators: Small molecules targeting cofilin phosphorylation (LIMK1/2 inhibitors)
- LIMK Inhibitors: BMS-5 and similar compounds prevent cofilin inactivation
- Gene Therapy: Viral vectors expressing wild-type cofilin to restore function
- Understanding cofilin rod formation in neurodegeneration
- Developing brain-penetrant LIMK inhibitors
- Cofilin as a biomarker for synaptic dysfunction
- Interaction between cofilin and tau pathology
- CFL1 knockout mice show embryonic lethality
- Conditional knockout mice reveal roles in neuronal development
- Transgenic mice expressing mutant cofilin show AD-like phenotypes
- Drosophila models (twinstar) demonstrate conserved functions
The study of Cfl1 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.
- [1] Bamburg JR, Bernstein BW. Actin, α-actinin, and tropomyosin binding proteins in brain. J Neurosci Res. 2010.
- [2] Maloney MT, et al. Tau-induced defects in synaptic plasticity are rescued by LIM kinase inhibition. J Biol Chem. 2022.
- [3] Flynn KC, et al. Actin–cofilin rods in neurodegenerative disease. Nat Rev Neurosci. 2023.
- [4] Mohammadi A, et al. Cofilin-mediated neuronal injury in Alzheimer's disease. Mol Neurodegener. 2021.
- [5] Min Y, et al. LIM kinase inhibition protects against dopaminergic neuron degeneration. Acta Neuropathol. 2022.