Leucine-rich glioma inactivated 2 (LGI2) like LIG1, is neuronally secreted and acts on ADAM (a-disintegrin-and-metalloproteinase) family of neuronal membrane proteins, which function in synapse remodelling. Based on the experiments performed in canine and rat brain it proves that LGI2 interacts with ADAM22 and ADAM23 following secretion. Truncation of Lgi2 prevents its secretion and ADAM interactions causing remitting focal-onset epilepsy in dogs between ages one and four months, which is equivalent to human two to eight years. It has been suggested that LGI2 participates in protecting the brain against seizures during the pruning phase of neurodevelopment (Seppala et al. 2011).