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Prostaglandin E(1) protects human liver sinusoidal endothelial cell from apoptosis induced by hypoxia reoxygenation

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Published in Microvascular Research. 2002, vol. 64, no. 1, p. 94-103
Abstract Hepatic ischemia-reperfusion injury is an important cause of graft dysfunction after liver transplantation. Liver sinusoidal endothelial cells (LSECs) are particularly sensitive to ischemia-reperfusion injury and undergo apoptosis. This study investigates the protective role of PGE(1) on apoptosis of LSEC during hypoxia-reoxygenation in vitro. Hypothermia-hypoxia followed by reoxygenation triggered LSEC apoptosis, and prostaglandin PGE(1) protected LSEC from apoptosis in a dose-dependent manner. The release of matrix metalloproteinases (MMPs) and nitric oxide (NO) by LSECs were increased after hypoxia reoxygenation. Both the MMP inhibitor BB3103 and the NO inhibitor LNAM effectively decreased LSEC apoptosis, suggesting a separate role of MMPs and NO in hypoxia-reoxygenation-induced LSEC apoptosis. PGE(1) down-regulated NO production by inhibiting the expression of inducible NO synthase in LSEC. PGE(1) also inhibited MMP-2 release from LSEC during hypoxia reoxygenation. These results indicate that the protection of LSECs from apoptosis by PGE(1) in hepatic ischemia-reperfusion injury is mediated by inhibiting inducible NO synthase and MMP release.
Keywords Alprostadil/pharmacologyAnoxiaApoptosisCell LineDNA FragmentationDose-Response Relationship, DrugEndothelium, Vascular/metabolismHumansImmunohistochemistryIn Situ Nick-End LabelingLiver/drug effects/pathologyMatrix Metalloproteinase 2/metabolismMatrix Metalloproteinases/metabolismNitric Oxide/metabolismNitric Oxide Synthase/metabolismOxygen/metabolismReperfusion Injury
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PMID: 12074635
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Article (Published version) (163 Kb) - document accessible for UNIGE members only Limited access to UNIGE
Structures
Research groups Hépatologie chirurgicale (327)
Chirurgie viscérale (104)
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YANG, Hong et al. Prostaglandin E(1) protects human liver sinusoidal endothelial cell from apoptosis induced by hypoxia reoxygenation. In: Microvascular Research, 2002, vol. 64, n° 1, p. 94-103. https://archive-ouverte.unige.ch/unige:38187

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Deposited on : 2014-06-26

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