WASF1, also known as WAVE1, is a key component of the WAVE regulatory complex (WRC) and plays a crucial role in actin polymerization. It acts as a mediator between Rac-GTPase and actin, regulating the dynamics of the actin cytoskeleton, which is essential for many routine physiological functions such as cell motility [3,4].

De novo truncating and missense mutations in WASF1 have been linked to neurodevelopmental disorders. In humans, these mutations can lead to moderate-to-profound intellectual disability, autistic features, and epilepsy. For instance, functional studies using fibroblast cells from affected individuals with specific WASF1 mutations showed a truncated WASF1 and a defect in actin remodeling, providing evidence that de novo heterozygous mutations in WASF1 cause a rare form of intellectual disability [3]. Multiple case reports have identified various WASF1 variants in patients with developmental delay, microcephaly, early-onset seizures, and other neurodevelopmental issues, expanding the understanding of the genotypic and phenotypic spectrum of WASF1-related neurodevelopmental disorder [1,2,5].

In conclusion, WASF1 is vital for actin polymerization and normal cell motility. Research on WASF1-related mutations in human patients has significantly contributed to understanding its role in neurodevelopmental disorders. These findings highlight the importance of WASF1 in normal neurodevelopment and the consequences of its genetic disruption, providing insights into the underlying mechanisms of such disorders.