CXCR1 is a G protein-coupled chemokine receptor that serves as the primary receptor for interleukin-8 (CXCL8), functioning as a critical mediator of neutrophil recruitment and activation during inflammatory responses 1. Upon CXCL8 binding, CXCR1 activates G protein-mediated signaling pathways that trigger neutrophil chemotaxis, calcium mobilization, and respiratory burst responses essential for antimicrobial defense 1. The receptor plays a dual role in pathophysiology: while necessary for immune defense, excessive CXCR1 signaling contributes to inflammatory diseases and cancer progression 2. In sepsis, CXCR1 signaling promotes neutrophil extracellular trap (NET) formation, leading to thrombosis and organ injury 3. CXCR1+ neutrophils are associated with resistance to EGFR-targeted therapy in lung cancer and promote tumor progression in hepatocellular carcinoma through activation of NF-κB signaling 45. Additionally, CXCR1 signaling facilitates viral replication by activating MAPK pathways that enhance viral RNA recognition 6. Therapeutic targeting of CXCR1/2 shows promise for treating inflammatory conditions, cancer, and hyperoxia-induced lung injury, though careful evaluation is needed to avoid compromising antimicrobial immunity 71.