IL1B and peritonitis: Finally, based on previous findings, Virzì et al. investigated the relationship between systemic eryptosis and specific biomarkers of peritonitis in the PD-effluent (PDE), including pWBC (peritoneal white blood cells), pNGAL (peritoneal Neutrophil Gelatinase-Associated Lipocalin), and the inflammatory cytokines IL-6 and IL-1β.