An Open-Label Extension Study of STK-001 for Patients With Dravet Syndrome

This study is a multi-center, open-label, multiple-dose, safety extension study for patients who have completed another study of zorevunersen and meet study eligibility criteria. zorevunersen is an investigational new medicine for the treatment of Dravet syndrome. Zorevunersen is an antisense oligonucleotide (ASO) that is intended to increase the level of productive SCN1A messenger RNA (mRNA) and consequently increase the expression of the sodium channel Nav1.1 protein. This RNA-based approach is not gene therapy, but rather RNA modulation, as it does not manipulate nor insert genetic deoxyribonucleic acid (DNA). Zorevunersen is designed to upregulate Nav1.1 protein expression from the nonmutant (wild-type) copy of the SCN1A gene to restore physiological Nav1.1 levels. Nav1.1 levels are reduced in people with Dravet syndrome. Stoke has generated preclinical data demonstrating proof-of-mechanism for zorevunersen.