9(S)-HODE cholesteryl ester is primarily studied for its role in biological systems, particularly in the context of inflammation and oxidative stress. It is known to be involved in signaling pathways that regulate immune responses and cellular functions. Researchers investigate its potential impact on atherosclerosis, as it may contribute to the formation of foam cells, which are critical in the development of plaque within arteries. Additionally, it is used in studies exploring lipid metabolism and its influence on diseases linked to oxidative damage, such as cardiovascular disorders. Its applications are largely confined to research settings, where it serves as a tool to understand the molecular mechanisms underlying inflammation and lipid-related pathologies.