Used in cell signaling research, particularly in studies related to immune response, inflammation, and cell migration. Plays a key role in regulating lymphocyte trafficking, making it relevant in autoimmune disease research. Investigated for its effects on vascular system development and endothelial cell function. Also studied in cancer biology due to its involvement in tumor progression and angiogenesis. Commonly used in in vitro assays to activate S1P receptors and examine downstream signaling pathways.