Adherens junctions (AJs) are critical for maintaining the barrier function of endothelial cells, which regulate vascular permeability. VE-cadherin, a key component of AJs, is essential for endothelial cell-cell adhesion and vascular integrity. The dynamic regulation of VE-cadherin and other AJ proteins is crucial for controlling vascular permeability, which is essential for maintaining tissue homeostasis. Pathological conditions such as inflammation, sepsis, and diabetes can disrupt AJ function, leading to increased vascular permeability and organ dysfunction. VE-cadherin is regulated by various signaling pathways, including tyrosine phosphorylation, which can weaken AJs and increase permeability. Factors such as histamine, thrombin, and VEGF induce tyrosine phosphorylation of VE-cadherin, leading to increased vascular permeability and leukocyte diapedesis. Additionally, the internalization and cleavage of VE-cadherin can disrupt AJs, further increasing permeability. The regulation of VE-cadherin is also influenced by other proteins, such as p120, β-catenin, and plakoglobin, which interact with VE-cadherin to maintain AJ stability. The phosphorylation of VE-cadherin at specific residues, such as Ser665, is crucial for its internalization and the subsequent increase in vascular permeability. Phosphorylation of VE-cadherin can be modulated by various kinases, including SRC, and phosphatases such as VE-PTP. The balance between these enzymes determines the stability of AJs and vascular permeability. Additionally, the activity of small GTPases like RAP1 and its regulators, such as EPAC1, also influences AJ organization and vascular permeability. Understanding the molecular mechanisms that regulate VE-cadherin and AJ function is essential for developing pharmacological strategies to control vascular permeability. Potential therapeutic approaches include the use of SRC inhibitors, agents that increase cAMP levels, and inhibitors of lytic enzymes. These strategies aim to modulate AJ function and maintain vascular integrity in pathological conditions. The study of these mechanisms provides insights into the complex interplay between AJ organization, vascular permeability, and tissue homeostasis.Adherens junctions (AJs) are critical for maintaining the barrier function of endothelial cells, which regulate vascular permeability. VE-cadherin, a key component of AJs, is essential for endothelial cell-cell adhesion and vascular integrity. The dynamic regulation of VE-cadherin and other AJ proteins is crucial for controlling vascular permeability, which is essential for maintaining tissue homeostasis. Pathological conditions such as inflammation, sepsis, and diabetes can disrupt AJ function, leading to increased vascular permeability and organ dysfunction. VE-cadherin is regulated by various signaling pathways, including tyrosine phosphorylation, which can weaken AJs and increase permeability. Factors such as histamine, thrombin, and VEGF induce tyrosine phosphorylation of VE-cadherin, leading to increased vascular permeability and leukocyte diapedesis. Additionally, the internalization and cleavage of VE-cadherin can disrupt AJs, further increasing permeability. The regulation of VE-cadherin is also influenced by other proteins, such as p120, β-catenin, and plakoglobin, which interact with VE-cadherin to maintain AJ stability. The phosphorylation of VE-cadherin at specific residues, such as Ser665, is crucial for its internalization and the subsequent increase in vascular permeability. Phosphorylation of VE-cadherin can be modulated by various kinases, including SRC, and phosphatases such as VE-PTP. The balance between these enzymes determines the stability of AJs and vascular permeability. Additionally, the activity of small GTPases like RAP1 and its regulators, such as EPAC1, also influences AJ organization and vascular permeability. Understanding the molecular mechanisms that regulate VE-cadherin and AJ function is essential for developing pharmacological strategies to control vascular permeability. Potential therapeutic approaches include the use of SRC inhibitors, agents that increase cAMP levels, and inhibitors of lytic enzymes. These strategies aim to modulate AJ function and maintain vascular integrity in pathological conditions. The study of these mechanisms provides insights into the complex interplay between AJ organization, vascular permeability, and tissue homeostasis.