Dynamic neutrophil lipidome remodeling during induction of NETosis

Abstract

Neutrophil extracellular trap formation (NETosis) affects a wide variety of clinically relevant human diseases. Al though lipid remodeling is essential for neutrophil function and membrane rupture during NETosis, the neutro phil lipidome and its dynamics have not been characterized. Thus, we establish a quantitative lipidome of human neutrophils comprising 1048 species across nine orders of magnitude and map its remodeling during NETosis. NET formation caused profound alterations in the phosphatidylinositol, phosphatidic acid, diacylglycerol (DG), and lyso-glycerophospholipid levels. Calcium- and reactive oxygen species–dependent NETosis pathways dis played distinct lipidomic trajectories yet converged on the significance of phospholipid lipase networks. Pharma cological inhibition of this networks altered lipid composition and markedly impaired NETosis, while DG treatment revoked the effect. Together, our findings reveal lipid remodeling as a fundamental determinant of NETosis and identify interconnected and dependent phospholipid lipase networks with downstream DG-dependent signaling as a potential therapeutic target in NET-associated diseases.