Kassinin is primarily used in research settings to study the role of tachykinin receptors in various physiological processes. It is particularly valuable in neuroscience and pharmacology for investigating its effects on smooth muscle contraction, pain perception, and inflammation. Kassinin is also utilized in studies related to the central nervous system, where it helps in understanding the modulation of neurotransmitter release and receptor interactions. Additionally, it serves as a tool in exploring potential therapeutic targets for conditions like asthma, irritable bowel syndrome, and chronic pain disorders. Its application extends to in vitro and in vivo experiments aimed at elucidating the mechanisms of tachykinin-mediated signaling pathways.