Not a chemical compound; it is a recombinant cell line expressing the human TREM1 protein, typically used in biomedical research. It serves as a model system to study TREM1 signaling pathways involved in inflammation and immune responses. Commonly applied in drug development for inflammatory diseases, sepsis, and cancer immunotherapy to screen and evaluate potential inhibitors or modulators of TREM1 activity. Also used in mechanistic studies to understand receptor-ligand interactions and downstream signaling events in immune cells.