KCNB1, encoding the α subunit of the delayed rectifier voltage-dependent potassium channel Kv 2.1, is a key player in multiple biological processes. It conducts a major delayed rectifier current in the brain, pancreas, and cardiovascular system and is involved in apoptotic programs associated with oxidative stress [1].

In animal models, KCNB1 null mice showed impaired neuronal migration of glutamatergic neurons in the neocortex, with persistent migratory defects in adulthood, along with disrupted morphology and synaptic connectivity. These mice also developed a seizure phenotype, anxiety, and compulsive behavior [3]. In zebrafish, a Kcnb1 loss-of-function mutation affected inner ear development at multiple levels, including otic vesicle expansion, otolith formation, and the proliferation and differentiation of mechanosensory cells [2].

In conclusion, KCNB1 is essential for normal neuronal and inner ear development. The study of KCNB1 knockout mouse models has revealed its crucial role in the development of neurological phenotypes such as epilepsy and behavioral disorders, providing important insights into the underlying mechanisms of these diseases [2,3].