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Genetic Epilepsy v0.998 FGF13 Zornitza Stark gene: FGF13 was added
gene: FGF13 was added to Genetic Epilepsy. Sources: Literature
Mode of inheritance for gene: FGF13 was set to X-LINKED: hemizygous mutation in males, biallelic mutations in females
Publications for gene: FGF13 were set to 33245860
Phenotypes for gene: FGF13 were set to Intellectual disability; epilepsy
Review for gene: FGF13 was set to GREEN
Added comment: Two sibling pairs and three unrelated males reported who presented in infancy with intractable focal seizures and severe developmental delay. The variants were located in the N-terminal domain of the A isoform of FGF13/FHF2 (FHF2A). The X-linked FHF2 gene (also known as FGF13) has alternative first exons which produce multiple protein isoforms that differ in their N-terminal sequence. The variants were located at highly conserved residues in the FHF2A inactivation particle that competes with the intrinsic fast inactivation mechanism of Nav channels. Functional characterization of mutant FHF2A co-expressed with wild-type Nav1.6 (SCN8A) revealed that mutant FHF2A proteins lost the ability to induce rapid-onset, long-term blockade of the channel while retaining pro-excitatory properties. These gain-of-function effects are likely to increase neuronal excitability consistent with the epileptic potential of FHF2 variants.
Sources: Literature
Genetic Epilepsy v0.664 SCN8A Zornitza Stark Publications for gene: SCN8A were set to 31625145; 30842224
Genetic Epilepsy v0.663 SCN8A Zornitza Stark Publications for gene: SCN8A were set to 31625145
Genetic Epilepsy v0.657 SCN8A Ain Roesley reviewed gene: SCN8A: Rating: AMBER; Mode of pathogenicity: None; Publications: PMID: 30842224; Phenotypes: Rett syndrome, Rett-like phenotypes; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Genetic Epilepsy v0.130 SCN8A Zornitza Stark Marked gene: SCN8A as ready
Genetic Epilepsy v0.130 SCN8A Zornitza Stark Gene: scn8a has been classified as Green List (High Evidence).
Genetic Epilepsy v0.130 SCN8A Zornitza Stark Phenotypes for gene: SCN8A were changed from to Epileptic encephalopathy, early infantile, 13, MIM# 614558; dominant and recessive
Genetic Epilepsy v0.129 SCN8A Zornitza Stark Publications for gene: SCN8A were set to
Genetic Epilepsy v0.128 SCN8A Zornitza Stark Mode of pathogenicity for gene: SCN8A was changed from to Other
Genetic Epilepsy v0.127 SCN8A Zornitza Stark Mode of inheritance for gene: SCN8A was changed from Unknown to BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Genetic Epilepsy v0.126 SCN8A Zornitza Stark reviewed gene: SCN8A: Rating: GREEN; Mode of pathogenicity: Other; Publications: 31625145; Phenotypes: Epileptic encephalopathy, early infantile, 13, MIM# 614558, dominant and recessive; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Genetic Epilepsy v0.0 SCN8A Zornitza Stark gene: SCN8A was added
gene: SCN8A was added to Genetic Epilepsy_AustralianGenomics_VCGS. Sources: Australian Genomics Health Alliance Epilepsy Flagship,Expert Review Green,Victorian Clinical Genetics Services
Mode of inheritance for gene: SCN8A was set to Unknown