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2014 ; 63
(9
): 741-56
Nephropedia Template TP
gab.com Text
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English Wikipedia
Effects of 5,14-HEDGE, a 20-HETE mimetic, on lipopolysaccharide-induced changes
in MyD88/TAK1/IKK?/I?B-?/NF-?B pathway and circulating miR-150, miR-223, and
miR-297 levels in a rat model of septic shock
#MMPMID24915805
Sari AN
; Korkmaz B
; Serin MS
; Kacan M
; Unsal D
; Buharalioglu CK
; Sahan Firat S
; Manthati VL
; Falck JR
; Malik KU
; Tunctan B
Inflamm Res
2014[Sep]; 63
(9
): 741-56
PMID24915805
show ga
OBJECTIVES: We have previously demonstrated that a stable synthetic analog of
20-hydroxyeicosatetraenoic acid (20-HETE),
N-(20-hydroxyeicosa-5[Z],14[Z]-dienoyl)glycine (5,14-HEDGE), which mimics the
effects of endogenously produced 20-HETE, prevents vascular hyporeactivity,
hypotension, tachycardia, inflammation, and mortality in a rodent model of septic
shock. The present study was performed to determine whether decreased renal and
cardiovascular expression and activity of myeloid differentiation factor 88
(MyD88)/transforming growth factor-activated kinase 1 (TAK1)/inhibitor of ?B
(I?B) kinase ? (IKK?)/I?B-?/nuclear factor-?B (NF-?B) pathway and reduced
circulating microRNA (miR)-150, miR-223, and miR-297 expression levels
participate in the protective effect of 5,14-HEDGE against hypotension,
tachycardia, and inflammation in response to systemic administration of
lipopolysaccharide (LPS). METHODS: Conscious male Wistar rats received saline
(4 ml/kg) or LPS (10 mg/kg) at time 0. Blood pressure and heart rate were
measured using a tail-cuff device. Separate groups of LPS-treated rats were given
5,14-HEDGE (30 mg/kg) 1 h after injection of saline or LPS. The rats were killed
4 h after LPS challenge and blood, kidney, heart, thoracic aorta, and superior
mesenteric artery were collected for measurement of the protein expression.
RESULTS: LPS-induced fall in blood pressure and rise in heart rate were
associated with increased MyD88 expression and phosphorylation of TAK1 and I?B-?
in cytosolic fractions of the tissues. LPS also caused an increase in both
unphosphorylated and phosphorylated NF-?B p65 proteins in the cytosolic and
nuclear fractions as well as nuclear translocation of NF-?B p65. In addition,
serum miR-150, miR-223, and miR-297 expression levels were increased in
LPS-treated rats. These effects of LPS were prevented by 5,14-HEDGE. CONCLUSIONS:
These results suggest that downregulation of MyD88/TAK1/IKK?/I?B-?/NF-?B pathway
as well as decreased circulating miR-150, miR-223, and miR-297 expression levels
participate in the protective effect of 5,14-HEDGE against hypotension,
tachycardia, and inflammation in the rat model of septic shock.
|Animals
[MESH]
|Aorta, Thoracic/drug effects/metabolism
[MESH]
|Arterial Pressure/drug effects
[MESH]
|Disease Models, Animal
[MESH]
|Heart Rate/drug effects
[MESH]
|Hydroxyeicosatetraenoic Acids
[MESH]
|I-kappa B Kinase/metabolism
[MESH]
|I-kappa B Proteins/metabolism
[MESH]
|Kidney/drug effects/metabolism
[MESH]
|Lipopeptides/*pharmacology/therapeutic use
[MESH]