When injected into a monkey model of endometriosis with its long-acting recovery antibody (AMY109), IL-8, a potent chemoattractant for angiogenic factors and immune cells, can inhibit neutrophil recruitment to endometrial lesions and suppress their production of monocyte chemotactic protein-1, thereby ameliorating endometriosis inflammation and fibrosis (59). The gene discussed is CXCL8; the disease is endometriosis.