Kcnh1, also known as potassium voltage-gated channel subfamily H member 1, encodes a member of the EAG (ether-à-go-go) family. It controls potassium flux regulating resting membrane potential in both excitable and non-excitable cells, and is involved in intracellular signaling, cell proliferation, and tumorigenesis [3].

Kcnh1 missense variants have been associated with multiple syndromic neurodevelopmental disorders. In Temple-Baraitser syndrome (TMBTS), a patient was found with a pathogenic missense mutation in Kcnh1 (c. 1529 A > C; Asn510Thr), presenting with features like severe mental retardation, anomalies of thumb and great toe with nail absence/hypoplasia [1]. Mutations in Kcnh1 are also related to Zimmermann-Laband syndrome 1 (ZLS1), and epilepsy is a key phenotypic feature in most individuals with Kcnh1-related syndromes [4]. Additionally, in osteosarcoma, circ_0016347 promotes tumor progression through the miR-1225-3p/Kcnh1 axis [2].

In conclusion, Kcnh1 is crucial for regulating potassium flux and is involved in various biological processes. Its mutations are associated with multiple neurodevelopmental disorders and diseases like osteosarcoma. Understanding Kcnh1 through genetic models can provide insights into the molecular mechanisms underlying these conditions, potentially leading to new therapeutic strategies for related diseases.