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2015 ; 17
(6
): 775-87
Nephropedia Template TP
gab.com Text
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English Wikipedia
Synergistic Action of Staphylococcus aureus ?-Toxin on Platelets and Myeloid
Lineage Cells Contributes to Lethal Sepsis
#MMPMID26067604
Powers ME
; Becker RE
; Sailer A
; Turner JR
; Bubeck Wardenburg J
Cell Host Microbe
2015[Jun]; 17
(6
): 775-87
PMID26067604
show ga
Multi-organ failure contributes to mortality in bacterial sepsis. Platelet and
immune cell activation contribute to organ injury during sepsis, but the
mechanisms by which bacterial virulence factors initiate these responses remain
poorly defined. We demonstrate that during lethal sepsis, Staphylococcus aureus
?-toxin simultaneously alters platelet activation and promotes neutrophil
inflammatory signaling through interactions with its cellular receptor ADAM10.
Platelet intoxication prevents endothelial barrier repair and facilitates
formation of injurious platelet-neutrophil aggregates, contributing to lung and
liver injury that is mitigated by ADAM10 deletion on platelets and myeloid
lineage cells. While platelet- or myeloid-specific ADAM10 knockout does not alter
sepsis mortality, double-knockout animals are highly protected. These results
define a pathway by which a single bacterial toxin utilizes a widely expressed
receptor to coordinate progressive, multi-organ disease in lethal sepsis. As an
expression-enhancing ADAM10 polymorphism confers susceptibility to severe human
sepsis, these studies highlight the importance of understanding molecular
host-microbe interactions.
|*Host-Pathogen Interactions
[MESH]
|ADAM Proteins/genetics/*metabolism
[MESH]
|ADAM10 Protein
[MESH]
|Acute Lung Injury/physiopathology
[MESH]
|Amyloid Precursor Protein Secretases/genetics/*metabolism
[MESH]