Extracellular DNA in neutrophil extracellular traps (NET DNA)

Extracellular DNA within neutrophil extracellular traps (NETs) is a central structural and functional element of NETs, released by neutrophils during a specialized form of cell death called NETosis. This extracellular DNA forms a web-like backbone, decorated with histones and various neutrophil granule proteins (such as elastase, myeloperoxidase, and lactoferrin), which can trap and neutralize pathogens[1][2][5][6][7][8][9]. While NET-DNA helps confine infection and facilitate the host immune response, its persistence and accumulation are implicated in the pathogenesis of numerous diseases, including autoimmune and inflammatory conditions, thrombosis, and cancer[2][3][5][6][7][8]. Drugs such as DNase I target NET DNA to disrupt these extracellular structures, attenuating their pathological effects[5]. NET DNA can further serve as a biomarker in the circulation for disease activity or therapeutic monitoring[8]. The concept is a biofunctional extracellular nucleic acid, not a classic molecular target like a receptor or enzyme, and is part of a larger NET structure, so strict ontological accuracy considers "extracellular DNA in NETs" a functional disease mediator rather than a canonical molecular drug target[1][2][5].

Other names

Neutrophil extracellular trap DNANET-associated DNANETs (referring to the full structure, not just DNA)NET DNA fiber

Enzymatic degradation of extracellular DNA to disrupt NETs