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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Clin+Med
2017 ; 6
(2
): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Effector Mechanisms of Neutrophils within the Innate Immune System in Response to
Mycobacterium tuberculosis Infection
#MMPMID28178208
Warren E
; Teskey G
; Venketaraman V
J Clin Med
2017[Feb]; 6
(2
): ä PMID28178208
show ga
Neutrophils have a significant yet controversial role in the innate immune
response to Mycobacterium tuberculosis (M. tb) infection, which is not yet fully
understood. In addition to neutrophils' well-known effector mechanisms, they may
also help control infection of M. tb through the formation of neutrophil
extracellular traps (NETs), which are thought to further promote the killing of
M. tb by resident alveolar macrophages. Cytokines such as IFN-? have now been
shown to serve an immunomodulatory role in neutrophil functioning in conjunction
to its pro-inflammatory function. Additionally, the unique transcriptional
changes of neutrophils may be used to differentiate between infection with M. tb
and other bacterial and chronic rheumatological diseases such as Systemic Lupus
Erythematosus. Adversely, during the innate immune response to M. tb,
inappropriate phagocytosis of spent neutrophils can result in nonspecific damage
to host cells due to necrotic lysis. Furthermore, some individuals have been
shown to be more genetically susceptible to tuberculosis (TB) due to a "Trojan
Horse" phenomenon whereby neutrophils block the ability of resident macrophages
to kill M. tb. Despite these aforementioned negative consequences, through the
scope of this review we will provide evidence to support the idea that
neutrophils, while sometimes damaging, can also be an important component in
warding off M. tb infection. This is exemplified in immunocompromised
individuals, such as those with human immunodeficiency virus (HIV) infection or
Type 2 diabetes mellitus. These individuals are at an increased risk of
developing tuberculosis (TB) due to a diminished innate immune response
associated with decreased levels of glutathione. Consequently, there has been a
worldwide effort to limit and contain M. tb infection through the use of
antibiotics and vaccinations. However, due to several significant limitations,
the current bacille Calmette-Guerin vaccine (BCG, vaccine against TB) does not
meet the criteria for universal utilization for all ages and populations across
the globe. New research involving neutrophils has yielded a new vaccine called M.
smegmatis-Ag85C-MPT51-HspX (mc²-CMX) that has been shown to elicit a humoral and
cellular response against M. tb in mice that is superior to the BCG vaccine.