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Background

Hepatic ischemia-reperfusion (I/R) injury is a serious clinical complication that may compromise liver function because of extensive hepatocyte loss. Therefore, the development of novel and effective therapies for hepatic I/R is critical for the improvement of patient outcome. It has been previously shown that administration of milk fat globule-EGF factor VIII (MFG-E8), a membrane-associated secretory glycoprotein, exerts significant beneficial effects under acute inflammatory conditions through multiple physiological processes associated with tissue remodeling.

Methods

To determine whether administration of recombinant human (rh) MFG-E8 attenuates liver injury in an animal model of hepatic I/R, male adult rats were subjected to 70% hepatic ischemia for 90 min, followed by reperfusion. At the beginning of reperfusion, rats were treated intravenously with normal saline (vehicle) or rhMFG-E8 (160 μg/kg) over a period of 30 min. MFG-E8 levels and various measurements were assessed 4 h after reperfusion. In addition, survival study was conducted in MFG-E8(-/-) and rhMFG-E8-treated wild-type (WT) mice using a total hepatic ischemia model.

Results

Liver and plasma MFG-E8 protein levels were significantly decreased after hepatic I/R. Administration of rhMFG-E8 significantly improved liver injury, suppressed apoptosis, attenuated inflammation and oxidative stress, and downregulated NF-κB pathway. We also noticed that rhMFG-E8 treatment restored the downregulated PPAR-γ expression after hepatic I/R. MFG-E8(-/-) mice showed deterioration on survival and, in contrast, rhMFG-E8-treated WT mice showed a significant improvement of survival compared with vehicle-treated WT mice.

Conclusions

MFG-E8-mediated multiple physiological events may represent an effective therapeutic option in tissue injury following an episode of hepatic I/R."xsd:string
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http://purl.uniprot.org/citations/22487387http://purl.uniprot.org/core/author"Wang P."xsd:string
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http://purl.uniprot.org/citations/22487387http://purl.uniprot.org/core/name"J Surg Res"xsd:string
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http://purl.uniprot.org/citations/22487387http://purl.uniprot.org/core/title"Milk fat globule--EGF factor VIII ameliorates liver injury after hepatic ischemia-reperfusion."xsd:string
http://purl.uniprot.org/citations/22487387http://purl.uniprot.org/core/volume"180"xsd:string
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