VAP-1/SSAO (gene symbol AOC3) is an endothelial bound adhesion molecule with amine oxidase activity that is reported to be involved in neutrophil egress from the microvasculature during inflammation. The primary reference [3
] indicates the potential of inhibiting this enzyme using PXS-4728A, as a therapeutic approach in lung diseases that are characterized by a neutrophilic pattern of inflammation. A more recent paper reports PXS-4728A-mediated suppression of airway inflammation and fibrosis, as well as improved lung function in experimental COPD [1
]. Thirty nine analogues are exemplified in [2
] but without discrete activity values.