Neutrophils: innate effectors of TB resistance?
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Published version
Author(s)
Type
Journal Article
Abstract
Certain individuals are able to resist Mycobacterium tuberculosis infection despite persistent and intense exposure. These persons do not exhibit adaptive immune priming as measured by tuberculin skin test (TST) and interferon-γ (IFN-γ) release assay (IGRA) responses, nor do they develop active tuberculosis (TB). Genetic investigation of individuals who are able to resist M. tuberculosis infection shows there are likely a combination of genetic variants that contribute to the phenotype. The contribution of the innate immune system and the exact cells involved in this phenotype remain incompletely elucidated. Neutrophils are prominent candidates for possible involvement as primers for microbial clearance. Significant variability is observed in neutrophil gene expression and DNA methylation. Furthermore, inter-individual variability is seen between the mycobactericidal capacities of donor neutrophils. Clearance of M. tuberculosis infection is favored by the mycobactericidal activity of neutrophils, apoptosis, effective clearance of cells by macrophages, and resolution of inflammation. In this review we will discuss the different mechanisms neutrophils utilize to clear M. tuberculosis infection. We discuss the duality between neutrophils' ability to clear infection and how increasing numbers of neutrophils contribute to active TB severity and mortality. Further investigation into the potential role of neutrophils in innate immune-mediated M. tuberculosis infection resistance is warranted since it may reveal clinically important activities for prevention as well as vaccine and treatment development.
Date Issued
2018-11-14
Date Acceptance
2018-10-26
Citation
Frontiers in Immunology, 2018, 9
ISSN
1664-3224
Publisher
Frontiers Media
Journal / Book Title
Frontiers in Immunology
Volume
9
Copyright Statement
© 2018 Kroon, Coussens, Kinnear, Orlova,Möller, Seeger,Wilkinson, Hoal
and Schurr. This is an open-access article distributed under the terms of the Creative
Commons Attribution License (CC BY). The use, distribution or reproduction in
other forums is permitted, provided the original author(s) and the copyright owner(s)
are credited and that the original publication in this journal is cited, in accordance
with accepted academic practice. No use, distribution or reproduction is permitted
which does not comply with these terms.
and Schurr. This is an open-access article distributed under the terms of the Creative
Commons Attribution License (CC BY). The use, distribution or reproduction in
other forums is permitted, provided the original author(s) and the copyright owner(s)
are credited and that the original publication in this journal is cited, in accordance
with accepted academic practice. No use, distribution or reproduction is permitted
which does not comply with these terms.
Sponsor
Wellcome Trust
Grant Number
104803/Z/14/ZR
Subjects
Science & Technology
Life Sciences & Biomedicine
Immunology
Mycobacterium
tuberculosis
inflammation
NETs
antimicrobial
protection
necrosis
CHRONIC GRANULOMATOUS-DISEASE
MYCOBACTERIUM-TUBERCULOSIS INFECTION
COLONY-STIMULATING FACTOR
HUMAN POLYMORPHONUCLEAR LEUKOCYTES
PHAGOCYTE NADPH OXIDASE
NECROSIS-FACTOR-ALPHA
EXTRACELLULAR TRAPS
G-CSF
ANTIMICROBIAL PEPTIDES
HUMAN MACROPHAGES
Publication Status
Published
Article Number
ARTN 2637
Date Publish Online
2018-11-14