Used as a research tool in neuroscience and ion channel studies, particularly as a selective blocker of Kv1.3 potassium channels. This property makes it valuable in studying T-cell activation and autoimmune diseases, where Kv1.3 channels play a regulatory role. It has also been investigated for potential applications in modulating immune responses and in the development of therapies for conditions such as multiple sclerosis and type 1 diabetes. Additionally, Psora-4 is employed in electrophysiology experiments to dissect the functional roles of specific potassium channels in cellular models.