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2014 ; 42
(5
): 448-55
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A sphingosine-1 phosphate agonist (FTY720) limits trauma/hemorrhagic
shock-induced multiple organ dysfunction syndrome
#MMPMID25004059
Bonitz JA
; Son JY
; Chandler B
; Tomaio JN
; Qin Y
; Prescott LM
; Feketeova E
; Deitch EA
Shock
2014[Nov]; 42
(5
): 448-55
PMID25004059
show ga
BACKGROUND: Trauma/hemorrhagic shock (T/HS) is one of the major consequences of
battlefield injury as well as civilian trauma. FTY720 (sphingosine-1-phosphate
agonist) has the capability to decrease the activity of the innate and adaptive
immune systems and, at the same time, maintain endothelial cell barrier function
and vascular homeostasis during stress. For this reason, we hypothesize that
FTY720, as part of resuscitation therapy, would limit T/HS-induced multiple organ
dysfunction syndrome in a rodent T/HS model. METHODS: Rats subjected to
trauma/sham shock (T/SS) or T/HS (30 mm Hg × 90 min) were administered FTY720 (1
mg/kg) post-T/HS during volume resuscitation. Lung injury (permeability to Evans
blue dye), polymorphonuclear leukocyte (PMN) priming (respiratory burst
activity), and red blood cell (RBC) rigidity were measured. In addition, lymph
duct-cannulated rats were used to quantify the effect of FTY720 on gut injury
(permeability and morphology) and the biologic activity of T/HS versus T/SS lymph
on PMN-RBC and RBC deformability. RESULTS: Trauma/hemorrhagic shock-induced
increased lung permeability, PMN priming, and RBC rigidity were all abrogated by
FTY720. The systemic protective effect of FTY720 was only partially at the gut
level, because FTY720 did not prevent T/HS-induced gut injury (morphology or
permeability); however, it did abrogate T/HS lymph-induced increased respiratory
burst and RBC rigidity. CONCLUSIONS: FTY720 limited T/HS-induced multiple organ
dysfunction syndrome (lung injury, red cell injury, and neutrophil priming) as
well as T/HS lymph bioactivity, although it did not limit gut injury.
|Acute Lung Injury/etiology/prevention & control
[MESH]