MARK4 inhibitor 1 is primarily used in research settings to study the role of microtubule affinity-regulating kinase 4 (MARK4) in cellular processes. It is particularly valuable in investigating MARK4's involvement in neurodegenerative diseases, such as Alzheimer's, where abnormal tau protein phosphorylation is a key factor. By inhibiting MARK4, researchers can better understand its impact on tau pathology and neuronal function. Additionally, this inhibitor is utilized in cancer research to explore MARK4's role in cell cycle regulation and tumor progression, providing insights into potential therapeutic targets. Its application extends to studying metabolic disorders, as MARK4 is implicated in insulin signaling and glucose metabolism. Overall, MARK4 inhibitor 1 serves as a critical tool for probing the biological functions of MARK4 and its implications in various diseases.