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Title: Neutrophil-Mediated Immunopathology and Matrix Metalloproteinases in Central Nervous System – Tuberculosis
Authors: Poh, Xuan Ying
Loh, Fei Kean 
Friedland, Jon S
Ong, Catherine WM 
Issue Date: 2021
Publisher: Frontiers Media SA
Citation: Poh, Xuan Ying, Loh, Fei Kean, Friedland, Jon S, Ong, Catherine WM (2021). Neutrophil-Mediated Immunopathology and Matrix Metalloproteinases in Central Nervous System – Tuberculosis. Frontiers in Immunology 12. ScholarBank@NUS Repository.
Abstract: Tuberculosis (TB) remains one of the leading infectious killers in the world, infecting approximately a quarter of the world’s population with the causative organism Mycobacterium tuberculosis (M. tb). Central nervous system tuberculosis (CNS-TB) is the most severe form of TB, with high mortality and residual neurological sequelae even with effective TB treatment. In CNS-TB, recruited neutrophils infiltrate into the brain to carry out its antimicrobial functions of degranulation, phagocytosis and NETosis. However, neutrophils also mediate inflammation, tissue destruction and immunopathology in the CNS. Neutrophils release key mediators including matrix metalloproteinase (MMPs) which degrade brain extracellular matrix (ECM), tumor necrosis factor (TNF)-α which may drive inflammation, reactive oxygen species (ROS) that drive cellular necrosis and neutrophil extracellular traps (NETs), interacting with platelets to form thrombi that may lead to ischemic stroke. Host-directed therapies (HDTs) targeting these key mediators are potentially exciting, but currently remain of unproven effectiveness. This article reviews the key role of neutrophils and neutrophil-derived mediators in driving CNS-TB immunopathology.
Source Title: Frontiers in Immunology
ISSN: 16643224
DOI: 10.3389/fimmu.2021.788976
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