title: Intermittent selective clamping improves rat liver regeneration by attenuating oxidative and endoplasmic reticulum stress.
abstract: Intermittent clamping of the portal trial is an effective method to avoid excessive blood loss during hepatic resection, but this procedure may cause ischemic damage to liver. Intermittent selective clamping of the lobes to be resected may represent a good alternative as it exposes the remnant liver only to the reperfusion stress. We compared the effect of intermittent total or selective clamping on hepatocellular injury and liver regeneration. Entire hepatic lobes or only lobes to be resected were subjected twice to 10 min of ischemia followed by 5 min of reperfusion before hepatectomy. We provided evidence that the effect of intermittent clamping can be damaging or beneficial depending to its mode of application. Although transaminase levels were similar in all groups, intermittent total clamping impaired liver regeneration and increased apoptosis. In contrast, intermittent selective clamping improved liver protein secretion and hepatocyte proliferation when compared with standard hepatectomy. This beneficial effect was linked to better adenosine-5'-triphosphate (ATP) recovery, nitric oxide production, antioxidant activities and endoplasmic reticulum adaptation leading to limit mitochondrial damage and apoptosis. Interestingly, transient and early chaperone inductions resulted in a controlled activation of the unfolded protein response concomitantly to endothelial nitric oxide synthase, extracellular signal-regulated kinase-1/2 (ERK1/2) and p38 MAPK activation that favors liver regeneration. Endoplasmic reticulum stress is a central target through which intermittent selective clamping exerts its cytoprotective effect and improves liver regeneration. This procedure could be applied as a powerful protective modality in the field of living donor liver transplantation and liver surgery.
authors.affiliation: 1] Inserm, UMR 991, Liver, Metabolisms and Cancer, CHU Pontchaillou, F-35033 Rennes, France [2] Université de Rennes 1, F-35043 Rennes, France.
authors.forename: I
authors.initials: I
authors.lastname: Ben Mosbah
authors.affiliation: 1] Inserm, UMR 991, Liver, Metabolisms and Cancer, CHU Pontchaillou, F-35033 Rennes, France [2] Université de Rennes 1, F-35043 Rennes, France.
authors.forename: H
authors.initials: H
authors.lastname: Duval
authors.affiliation: 1] Inserm, UMR 991, Liver, Metabolisms and Cancer, CHU Pontchaillou, F-35033 Rennes, France [2] Université de Rennes 1, F-35043 Rennes, France.
authors.forename: S-F
authors.initials: SF
authors.lastname: Mbatchi
authors.affiliation: 1] Inserm, UMR 991, Liver, Metabolisms and Cancer, CHU Pontchaillou, F-35033 Rennes, France [2] Université de Rennes 1, F-35043 Rennes, France.
authors.forename: C
authors.initials: C
authors.lastname: Ribault
authors.affiliation: 1] Inserm, UMR 991, Liver, Metabolisms and Cancer, CHU Pontchaillou, F-35033 Rennes, France [2] Université de Rennes 1, F-35043 Rennes, France [3] Service de Chirurgie Hépatobiliaire et Digestive, CHU Pontchaillou, Rennes, France.
authors.forename: S
authors.initials: S
authors.lastname: Grandadam
authors.affiliation: 1] Inserm, UMR 991, Liver, Metabolisms and Cancer, CHU Pontchaillou, F-35033 Rennes, France [2] Université de Rennes 1, F-35043 Rennes, France.
authors.forename: J
authors.initials: J
authors.lastname: Pajaud
authors.affiliation: 1] Inserm, UMR 991, Liver, Metabolisms and Cancer, CHU Pontchaillou, F-35033 Rennes, France [2] Université de Rennes 1, F-35043 Rennes, France.
authors.forename: F
authors.initials: F
authors.lastname: Morel
authors.affiliation: 1] Inserm, UMR 991, Liver, Metabolisms and Cancer, CHU Pontchaillou, F-35033 Rennes, France [2] Université de Rennes 1, F-35043 Rennes, France [3] Service de Chirurgie Hépatobiliaire et Digestive, CHU Pontchaillou, Rennes, France.
authors.forename: K
authors.initials: K
authors.lastname: Boudjema
authors.affiliation: 1] Inserm, UMR 991, Liver, Metabolisms and Cancer, CHU Pontchaillou, F-35033 Rennes, France [2] Université de Rennes 1, F-35043 Rennes, France [3] Service de Chirurgie Hépatobiliaire et Digestive, CHU Pontchaillou, Rennes, France.
authors.forename: P
authors.initials: P
authors.lastname: Compagnon
authors.affiliation: 1] Inserm, UMR 991, Liver, Metabolisms and Cancer, CHU Pontchaillou, F-35033 Rennes, France [2] Université de Rennes 1, F-35043 Rennes, France.
authors.forename: A
authors.initials: A
authors.lastname: Corlu
mesh_terms: D000255:Adenosine Triphosphate / Q000378:metabolism; D000818:Animals; D000975:Antioxidants / Q000378:metabolism; D017209:Apoptosis; D049109:Cell Proliferation; D003250:Constriction; D004721:Endoplasmic Reticulum / Q000378:metabolism* / Q000473:pathology; D059865:Endoplasmic Reticulum Stress; D006498:Hepatectomy; D015227:Lipid Peroxidation; D008099:Liver / Q000098:blood supply* / Q000378:metabolism / Q000473:pathology / Q000503:physiopathology / Q000601:surgery*; D008102:Liver Circulation; D008115:Liver Regeneration; D008297:Male; D020928:Mitogen-Activated Protein Kinases / Q000378:metabolism; D009569:Nitric Oxide / Q000378:metabolism; D018384:Oxidative Stress; D051381:Rats; D017207:Rats, Sprague-Dawley; D017382:Reactive Oxygen Species / Q000378:metabolism; D015427:Reperfusion Injury / Q000378:metabolism / Q000473:pathology / Q000503:physiopathology / Q000517:prevention & control*; D015398:Signal Transduction; D013997:Time Factors; D056811:Unfolded Protein Response
chemical_list: D000975:Antioxidants; D017382:Reactive Oxygen Species; D009569:Nitric Oxide; D000255:Adenosine Triphosphate; D020928:Mitogen-Activated Protein Kinases