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Relevance to Autism

EPS8 levels were found to be reduced in brains of patients affected by autism compared to controls (Menna et al., 2013); in this same report, it was demonstrated that mice lacking Eps8 display immature spines, which are unable to undergo potentiation, and shows deficits in learning, memory, and social behavior.

Molecular Function

Signaling adapter that controls various cellular protrusions by regulating actin cytoskeleton dynamics and architecture. Acts as a regulator of axonal filopodia formation in neurons: in the absence of neurotrophic factors, negatively regulates axonal filopodia formation via actin-capping activity. Defects in EPS8 are associated with some cancers, such as pancreatic, oral squamous cell carcinomas or pituitary cancers.

External Links

        

References

Type
Title
Type of Disorder
Associated Disorders
Author, Year
Primary
Eps8 controls dendritic spine density and synaptic plasticity through its actin-capping activity.
ASD
No Rare Variants Available
Chromosome
CNV Locus
CNV Type
# of studies
Animal Model
12
Deletion-Duplication
 18
 
12
Deletion
 4
 
12
Deletion
 1
 
12
Deletion
 1
 
12
Deletion
 1
 
12
Duplication
 5
 
12
Deletion
 1
 
12
Duplication
 2
 
12
Duplication
 1
 
12
Duplication
 1
 

Model Summary

Mouse knock-outs of Eps8 display abnormal spine morphology and impaired potentiation.

References

Type
Title
Author, Year
Additional
Eps8 controls dendritic spine density and synaptic plasticity through its actin-capping activity.
Model Type: Genetic
Model Genotype: Homozygous
Mutation: A neomycin resistance cassette replaced one exon and part of a second exon.
Allele Type: Targeted (knock-out)
Strain of Origin: 129P2/OlaHsd
Genetic Background: B6.129P2-Eps8tm1Ppdf
ES Cell Line: E14 (ES Cell)
Mutant ES Cell Line:
Model Source:
Category
Entity
Quantity
Experimental Paradigm
Age at Testing
Structural dendritic plasticity1
Decreased
 Golgi-cox staining
 Adult
Dendritic architecture: spine density1
Increased
 NA
 Unreported
Event related potential (erp) in electroencephalography (eeg)1
Increased
 NA
 Adult
Social approach1
Decreased
 Three-chamber social approach test
 Unreported
Object recognition memory1
Decreased
 Novel object recognition test
 Unreported
Cued or contextual fear conditioning1
Decreased
 Passive avoidance test
 Adult
Spatial working memory1
Decreased
 T-maze test
 Adult
Spatial working memory1
Decreased
 Radial maze test
 Unreported
Size/growth1
 No change
 Body weight measurement
 Unreported
General locomotor activity1
 No change
 NA
 Unreported
Motor coordination and balance1
 No change
 Accelerating rotarod test
 Unreported
Motor coordination and balance1
 No change
 Wire hang test
 Unreported
Righting response1
 No change
 NA
 Unreported
Brain morphology1
 No change
 Immunohistochemistry
 Unreported
Synaptic morphology1
 No change
 Electron microscopy
 Unreported
Seizures1
 No change
 Observation of seizures
 Unreported
Hearing1
 No change
 Preyer's reflex test
 Unreported
Vision1
 No change
 Cliff avoidance test
 Unreported
Nest building behavior1
 No change
 Nest building assay
 Unreported
 Not Reported: Circadian sleep/wake cycle, Communications, Emotion, Immune response, Maternal behavior, Molecular profile, Physiological parameters, Repetitive behavior

 

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