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Type I IFN-mediated NET Release Promotes Mycobacterium Tuberculosis Replication and is Associated with Granuloma Caseation

Abstract

Neutrophils are the most abundant cell type in the airways of tuberculosis patients. Mycobacterium tuberculosis (Mtb) infection induces the release of neutrophil extracellular traps (NETs); however, the molecular regulation and impact of NET release on Mtb pathogenesis are unknown. We find that during Mtb infection in neutrophils, PAD4 citrullinates histones to decondense chromatin that gets released as NETs in a manner that can maintain neutrophil viability and promote Mtb replication. Type I interferon promotes the formation of chromatin-containing vesicles that allow NET release without compromising plasma membrane integrity. Analysis of nonhuman primate granulomas supports a model where neutrophils are exposed to type I interferon from macrophages as they migrate into the granuloma, thereby enabling the release of NETs associated with necrosis and caseation. Our data reveal NET release as a promising target to inhibit Mtb pathogenesis.

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Adduri S, Bohorquez J, Adejare O, Rincon D, Tucker T, Konduru N bioRxiv. 2025; .

PMID: 39975088 PMC: 11838271. DOI: 10.1101/2025.01.29.635571.

References
1.
Li P, Li M, Lindberg M, Kennett M, Xiong N, Wang Y . PAD4 is essential for antibacterial innate immunity mediated by neutrophil extracellular traps. J Exp Med. 2010; 207(9):1853-62. PMC: 2931169. DOI: 10.1084/jem.20100239. View

2.
Fuchs T, Brill A, Duerschmied D, Schatzberg D, Monestier M, Myers Jr D . Extracellular DNA traps promote thrombosis. Proc Natl Acad Sci U S A. 2010; 107(36):15880-5. PMC: 2936604. DOI: 10.1073/pnas.1005743107. View

3.
Smith C, Baker R, Proulx M, Mishra B, Long J, Park S . Host-pathogen genetic interactions underlie tuberculosis susceptibility in genetically diverse mice. Elife. 2022; 11. PMC: 8846590. DOI: 10.7554/eLife.74419. View

4.
Parker H, Dragunow M, Hampton M, Kettle A, Winterbourn C . Requirements for NADPH oxidase and myeloperoxidase in neutrophil extracellular trap formation differ depending on the stimulus. J Leukoc Biol. 2012; 92(4):841-9. DOI: 10.1189/jlb.1211601. View

5.
Subbian S, Tsenova L, OBrien P, Yang G, Koo M, Peixoto B . Phosphodiesterase-4 inhibition combined with isoniazid treatment of rabbits with pulmonary tuberculosis reduces macrophage activation and lung pathology. Am J Pathol. 2011; 179(1):289-301. PMC: 3123788. DOI: 10.1016/j.ajpath.2011.03.039. View