Document Detail


Intermittent ischemia enhances the uptake of indocyanine green to livers subject to ischemia and reperfusion.
MedLine Citation:
PMID:  22554202     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Background and Aim:   Intermittent ischemia is known to promote post perfusion bile flow, and hence recovery of liver function following ischemia reperfusion of the liver. However, the mechanisms involved are not well understood. The aim of this study was to identify the step(s) in the bile acid transport pathway altered by intermittent ischemia. Methods:  A rat model of segmental hepatic ischemia in which the bilateral median and left lateral lobes were made ischemic by clamping the blood vessels was employed. Indocyanine green (ICG), infrared spectroscopy, and compartmental kinetic analysis, were used to indirectly monitor the movement of bile acids across hepatocytes in situ. Rates of bile flow were measured gravimetrically. Results:  In control livers (not subjected to ischemia), the movement of ICG from the blood to bile fluid could be described by a three compartment model comprised of the blood, a rapidly-exchangeable compartment, and the hepatocyte cytoplasmic space. In livers subjected to continuous clamping, the rates of ICG uptake to the liver, and outflow from the liver, were greatly reduced compared with those in control livers. Intermittent clamping (three episodes of 15 min clamping) compared with continuous clamping substantially increased the rate of ICG uptake from the blood but had less effect on the rate of ICG outflow from hepatocytes. Conclusions:   It is concluded that intermittent ischemia promotes post reperfusion bile flow in the early phase of ischemia reperfusion injury principally by enhancing the movement of bile acids from the blood to hepatocytes. © 2012 Journal of Gastroenterology and Hepatology Foundation and Blackwell Publishing Asia Pty Ltd.
Authors:
Mathilde Steenks; Jeroen Peters; Willem Rademacher; Vincent B Nieuwenhuijs; Robert T A Padbury; Greg J Barritt
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-5-3
Journal Detail:
Title:  Journal of gastroenterology and hepatology     Volume:  -     ISSN:  1440-1746     ISO Abbreviation:  -     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-5-4     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8607909     Medline TA:  J Gastroenterol Hepatol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2012 Journal of Gastroenterology and Hepatology Foundation and Blackwell Publishing Asia Pty Ltd.
Affiliation:
Department of Medical Biochemistry, The HPB and Liver Transplant Unit, Flinders Medical Centre, and School of Medicine, Flinders University, Adelaide, South Australia, Australia; Department of Surgery, University Medical Centre, Groningen, The Netherlands.
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