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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 PLoS+One
2016 ; 11
(5
): e0155723
Nephropedia Template TP
gab.com Text
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Twit Text #
English Wikipedia
Receptor Interacting Protein 3-Mediated Necroptosis Promotes
Lipopolysaccharide-Induced Inflammation and Acute Respiratory Distress Syndrome
in Mice
#MMPMID27195494
Wang L
; Wang T
; Li H
; Liu Q
; Zhang Z
; Xie W
; Feng Y
; Socorburam T
; Wu G
; Xia Z
; Wu Q
PLoS One
2016[]; 11
(5
): e0155723
PMID27195494
show ga
Necrosis amplifies inflammation and plays important roles in acute respiratory
distress syndrome (ARDS). Necroptosis is a newly identified programmed necrosis
that is mediated by receptor interacting protein 3 (RIP3). However, the potential
involvement and impact of necroptosis in lipopolysaccharide (LPS)-induced ARDS
remains unknown. We therefore explored the role and mechanism of RIP3-mediated
necroptosis in LPS-induced ARDS. Mice were instilled with increasing doses of LPS
intratracheally to induce different degrees of ARDS. Lung tissues were harvested
for histological and TUNEL staining and western blot for RIP3, p-RIP3, X-linked
inhibitor of apoptosis protein (XIAP), mixed lineage kinase domain-like protein
(MLKL), total and cleaved caspases-3/8. Then, wild-type and RIP3 knock-out mice
were induced ARDS with 30 mg/kg LPS. Pulmonary cellular necrosis was labeled by
the propidium Iodide (PI) staining. Levels of TNF-a, Interleukin (IL)-1?, IL-6,
IL-1?, IL-10 and HMGB1, tissue myeloperoxidase (MPO) activity, neutrophil counts
and total protein concentration were measured. Results showed that in high dose
LPS (30mg/kg and 40mg/kg) -induced severe ARDS, RIP3 protein was increased
significantly, accompanied by increases of p-RIP3 and MLKL, while in low dose LPS
(10mg/kg and 20mg/kg) -induced mild ARDS, apoptosis was remarkably increased. In
LPS-induced severe ARDS, RIP3 knock-out alleviated the hypothermia symptom,
increased survival rate and ameliorated the lung tissue injury RIP3 depletion
also attenuated LPS-induced increase in IL-1?/?, IL-6 and HMGB1 release,
decreased tissue MPO activity, and reduced neutrophil influx and total protein
concentration in BALF in severe ARDS. Further, RIP3 depletion reduced the
necrotic cells in the lung and decreased the expression of MLKL, but had no
impact on cleaved caspase-3 in LPS-induced ARDS. It is concluded that
RIP3-mediated necroptosis is a major mechanism of enhanced inflammation and lung
tissue injury in high dose LPS- induced severe ARDS in mice.
|*Apoptosis
[MESH]
|*Necrosis
[MESH]
|Animals
[MESH]
|Bronchoalveolar Lavage Fluid
[MESH]
|Disease Models, Animal
[MESH]
|Inflammation/chemically induced
[MESH]
|Inhibitor of Apoptosis Proteins/metabolism
[MESH]
|Lipopolysaccharides
[MESH]
|Lung Injury/metabolism
[MESH]
|Lung/drug effects/metabolism
[MESH]
|Male
[MESH]
|Mice
[MESH]
|Mice, Inbred C57BL
[MESH]
|Mice, Knockout
[MESH]
|Neutrophils/metabolism
[MESH]
|Peroxidase/metabolism
[MESH]
|Receptor-Interacting Protein Serine-Threonine Kinases/genetics/*metabolism
[MESH]