SRT3109 is a CXCR2 ligand. CXCR2 ligands are potent chemoattractants for neutrophils and play a key role in the emigration of neutrophils from the blood to sites of tissue inflammation. Moreover, CXCR2 signaling may also regulate neutrophil mobilization from the bone marrow. Deletion of the chemokine receptor CXCR2 prevents the recruitment of neutrophils into tissues and subsequent development of experimental Lyme arthritis.