Rho GTPases are crucial regulators of neuronal development, influencing processes such as neurite outgrowth, axon pathfinding, and dendritic spine formation. These proteins, including RhoA, Rac1, and Cdc42, regulate the actin and microtubule cytoskeletons, which are essential for neuronal morphology and function. Rho GTPases function as binary switches, cycling between GTP-bound (active) and GDP-bound (inactive) states, and their activity is regulated by various proteins such as GEFs, GAPs, and GDIs. Key effectors of Rho GTPases include PAK kinases, which regulate actin dynamics and gene expression, and the WAVE family, which mediate actin-based processes. The Rho-kinase family and Diaphanous formins also play roles in cytoskeletal remodeling. Rho GTPases are involved in neurite initiation and outgrowth, with Rac and Cdc42 promoting neurite formation while RhoA antagonizes it. NGF signaling activates Rac and Cdc42, leading to neurite outgrowth, while RhoA activity inhibits this process. The interplay between these GTPases is tightly regulated to ensure proper neuronal development. Rho-kinase and other downstream effectors mediate neurite retraction, often in response to signals such as LPA or thrombin. Rho-kinase also regulates microtubule and intermediate filament dynamics, which are important for cell structure and neurite retraction. Other Rho GTPases, such as RhoG, Rnd1/2, TC10, and RhoT, also contribute to neurite formation and retraction. RhoG activates Rac and Cdc42, promoting neurite outgrowth, while Rnd proteins, with low intrinsic GTPase activity, may function as antagonists of RhoA signaling. The regulation of Rho GTPases is essential for proper neuronal development, and dysregulation can lead to cognitive impairments and neurological diseases. Understanding the roles of Rho GTPases and their effectors in neuronal development provides insights into the molecular mechanisms underlying neuronal function and disease.Rho GTPases are crucial regulators of neuronal development, influencing processes such as neurite outgrowth, axon pathfinding, and dendritic spine formation. These proteins, including RhoA, Rac1, and Cdc42, regulate the actin and microtubule cytoskeletons, which are essential for neuronal morphology and function. Rho GTPases function as binary switches, cycling between GTP-bound (active) and GDP-bound (inactive) states, and their activity is regulated by various proteins such as GEFs, GAPs, and GDIs. Key effectors of Rho GTPases include PAK kinases, which regulate actin dynamics and gene expression, and the WAVE family, which mediate actin-based processes. The Rho-kinase family and Diaphanous formins also play roles in cytoskeletal remodeling. Rho GTPases are involved in neurite initiation and outgrowth, with Rac and Cdc42 promoting neurite formation while RhoA antagonizes it. NGF signaling activates Rac and Cdc42, leading to neurite outgrowth, while RhoA activity inhibits this process. The interplay between these GTPases is tightly regulated to ensure proper neuronal development. Rho-kinase and other downstream effectors mediate neurite retraction, often in response to signals such as LPA or thrombin. Rho-kinase also regulates microtubule and intermediate filament dynamics, which are important for cell structure and neurite retraction. Other Rho GTPases, such as RhoG, Rnd1/2, TC10, and RhoT, also contribute to neurite formation and retraction. RhoG activates Rac and Cdc42, promoting neurite outgrowth, while Rnd proteins, with low intrinsic GTPase activity, may function as antagonists of RhoA signaling. The regulation of Rho GTPases is essential for proper neuronal development, and dysregulation can lead to cognitive impairments and neurological diseases. Understanding the roles of Rho GTPases and their effectors in neuronal development provides insights into the molecular mechanisms underlying neuronal function and disease.