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2017 ; 7
(1
): 15003
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Particles of different sizes and shapes induce neutrophil necroptosis followed by
the release of neutrophil extracellular trap-like chromatin
#MMPMID29101355
Desai J
; Foresto-Neto O
; Honarpisheh M
; Steiger S
; Nakazawa D
; Popper B
; Buhl EM
; Boor P
; Mulay SR
; Anders HJ
Sci Rep
2017[Nov]; 7
(1
): 15003
PMID29101355
show ga
The human body is exposed to a wide range of particles of industrial,
environmental or internal origin such as asbestos, alum, silica or crystals of
urate, calcium phosphate, calcium oxalate, cystine or cholesterol. Phagocytic
clearance of such particles involves neutrophils and macrophages. Here we report
that neutrophils encountering such particles of diverse sizes and shapes undergo
necrotic cell death, a process associated with the formation of neutrophil
extracellular trap (NET)-like extracellular DNA. In human neutrophils
receptor-interacting protein kinase (RIPK)-1 inhibition with necrostatin-1s or
mixed lineage kinase domain-like (MLKL) inhibition with necrosulfonamide
abrogated cell death and associated-neutrophil extracellular DNA release induced
by all of the aforementioned particles. Similar results were obtained with
Mlkl-deficient mice neutrophils for all particles in vitro. Furthermore,
Mlkl-deficient mice lacked tophus formation upon injection of MSU crystals into
subcutaneous air pouches. These findings imply that nano- or
microparticle-induced neutrophil extracellular DNA release is the consequence of
neutrophil necroptosis, a regulated form of cell necrosis defined by
RIPK1-RIPK3-MLKL signaling. Interestingly, this finding was consistent across
different particle sizes and shapes. The RIPK1-RIPK3-MLKL signaling pathway may
represent a potential therapeutic target in nano- or microparticle-related
diseases (crystallopathies).