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Febrile seizures and generalized epilepsy associated with a mutation in the Na+-channel ß1 subunit gene SCN1B
TLDR
It is shown that co-expression of the mutant ß1 subunit with a brain Na+-channel ß subunit in Xenopus laevis oocytes demonstrates that the mutation interferes with the ability of the subunit to modulate channel-gating kinetics consistent with a loss-of-function allele, developing the theme that idiopathic epilepsies are a family of channelopathies.
A missense mutation in the neuronal nicotinic acetylcholine receptor α4 subunit is associated with autosomal dominant nocturnal frontal lobe epilepsy
TLDR
A missense mutation that replaces serine with phenylalanine at codon 248, a strongly conserved amino acid residue in the second transmembrane domain is found in all 21 available affected family members and in four obligate carriers, but not in 333 healthy control subjects.
Incidence and origin of "null" alleles in the (AC)n microsatellite markers.
TLDR
The presence of a null allele may generate misleading data when individuals are haplotyped to determine the presence of linkage disequilibrium with a disease gene.
KCNQ2 encephalopathy: Emerging phenotype of a neonatal epileptic encephalopathy
TLDR
This study investigated whether KCNQ2/3 mutations are a frequent cause of epileptic encephalopathies with an early onset and whether a recognizable phenotype exists.
Mutant GABA(A) receptor gamma2-subunit in childhood absence epilepsy and febrile seizures.
TLDR
It is found that the mutation in GABRG2 (encoding the gamma2-subunit) abolished in vitro sensitivity to diazepam, raising the possibility that endozepines do in fact exist and have a physiological role in preventing seizures.
Mutations in the human ortholog of Aristaless cause X-linked mental retardation and epilepsy
TLDR
This work has identified mutations in an X chromosome–linked, Aristaless-related, homeobox gene (ARX), in nine families with mental retardation, various forms of epilepsy, including infantile spasms and myoclonic seizures, and dystonia.
X-linked protocadherin 19 mutations cause female-limited epilepsy and cognitive impairment
TLDR
Seven protocadherin 19 (PCDH19) gene mutations in seven families with EFMR resulted in the introduction of a premature termination codon and two missense mutations were predicted to affect adhesiveness of PCDH19 through impaired calcium binding.
PAK3 mutation in nonsyndromic X-linked mental retardation
TLDR
Impaired individuals in a multiplex pedigree with MRX (MRX30), previously mapped to Xq22, show a point mutation in the PAK3 (p21-activated kinase) gene, which encodes a serine-threonine kinase, which is critical for human cognitive function.
Mutant GABAA receptor γ2-subunit in childhood absence epilepsy and febrile seizures
TLDR
It is found that the mutation in GABRG2 (encoding the γ2-subunit) abolished in vitro sensitivity to diazepam, raising the possibility that endozepines do in fact exist and have a physiological role in preventing seizures.
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