SCN8A encephalopathy – and how it differs from Dravet Syndrome

Nav1.6. For some reason, SCN8A always met some resistance. In contrast to other epilepsy genes, it took a while for the community to embrace this gene as a genuine cause of epileptic encephalopathies. A recent publication in Neurology now investigates the phenotypic spectrum of SCN8A encephalopathy – and points out important features that distinguish this condition from Dravet Syndrome. Continue reading

STRADA mutations, mTOR activation and personalized medicine using rapamycin

Rapamycin. The mTOR pathway, known through its role in Tuberous Sclerosis Complex (TSC), becomes increasingly important in epilepsy. A wide range of epilepsies caused by brain malformations are due to mutations in genes involved in this pathway, and several neurodevelopmental disorders associated with macrocephaly, intellectual disability and epilepsy are known, where components of this pathway are altered due to germline mutations. For one of these disorders named PMSE (polyhydramnios, megalencephaly and symptomatic epilepsy), a recent paper in Science Translational Medicine reports the effects of treatment with rapamycin, an mTOR inhibitor. The results demonstrate that personalized medicine might in part be promising, asexisting drugs can be used in rare genetic diseases. Continue reading