Amot-KO Mouse

Angiomotin (Amot), a membrane protein, is involved in multiple essential biological functions. It plays a role in regulating cell-cell contact, cellular polarity, and cell growth, and is associated with pathways like the Hippo signaling pathway. Amot's functions are crucial in various biological processes including development, angiogenesis, and neuronal function [2,3,4]. Genetic models, especially KO/CKO mouse models, have been instrumental in studying Amot's functions.

In mice, neuron-specific deletion of Wwc1 and Wwc2, which are related to Amot, leads to reduced Amot protein levels, lower dendritic spine density in the cortex and hippocampus, and impaired cognitive functions. Ectopic expression of Amot partially rescues these neuronal phenotypes, indicating its importance in spinogenesis and cognition [1]. Conditional deletion of Amot and Yap1 in neurons causes a decrease in Purkinje cell dendritic tree complexity, abnormal cerebellar morphology, and motor coordination impairments, suggesting their role in dendrite development [2]. Endothelial-specific deletion of Amot in mice inhibits vascular network migration and expansion, as Amot is required for tip cell migration and filopodia extension, and it functions in relaying forces between fibronectin and the cytoskeleton [4]. In zebrafish and mice, genetic inactivation of Amot cleavage regulators leads to defective angiogenesis, and this phenotype can be rescued by overexpressing a C-terminal Amot cleavage product, showing its role in angiogenesis [5].

In conclusion, Amot is a key regulator in multiple biological processes. Model-based research, especially using KO/CKO mouse models, has revealed its significance in neuronal development, including spinogenesis, dendrite growth, and cognitive function, as well as in vascular development and angiogenesis. Understanding Amot's functions provides insights into the mechanisms of related diseases and may offer potential therapeutic targets.