Sodium channel protein type 1 subunit alpha gene regulatory region (SCN1A regulatory region)

The SCN1A gene regulatory region comprises the promoter, enhancers, and non-coding sequences that control the expression of the SCN1A gene, which encodes the alpha subunit of the voltage-gated sodium channel Nav1.1. This channel is primarily expressed in GABAergic inhibitory interneurons and is critical for maintaining the balance of excitation and inhibition in the brain. Mutations in SCN1A, particularly those leading to haploinsufficiency where only one functional allele remains, are the primary cause of Dravet syndrome, a severe form of childhood epilepsy. Therapeutic strategies targeting this regulatory region aim to upregulate the expression of the remaining healthy allele to restore normal Nav1.1 levels. Modern approaches include antisense oligonucleotides (ASOs) like STK-001 that target regulatory splicing events and gene therapies like ETX101 that utilize cell-specific enhancers to drive expression specifically in inhibitory neurons. By modulating the regulatory landscape of SCN1A, these treatments seek to address the underlying genetic cause of the disease rather than just managing symptoms.

Other names

SCN1A promoterSCN1A enhancerSCN1A non-coding regionSCN1A 5' untranslated regionSCN1A cis-regulatory elements

Targeted augmentation of gene expression through antisense oligonucleotides (ASOs) that prevent non-productive splicing (TANGO technology) or viral-mediated delivery of engineered transcription factors and cell-specific enhancers to increase wild-type SCN1A mRNA production.