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Organ-specific Responses During Brain Death: Increased Aerobic Metabolism in the Liver and Anaerobic Metabolism with Decreased Perfusion in the Kidneys

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Journal Sci Rep
Specialty Science
Date 2018 Mar 15
PMID 29535334
Citations 13
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Abstract

Hepatic and renal energy status prior to transplantation correlates with graft survival. However, effects of brain death (BD) on organ-specific energy status are largely unknown. We studied metabolism, perfusion, oxygen consumption, and mitochondrial function in the liver and kidneys following BD. BD was induced in mechanically-ventilated rats, inflating an epidurally-placed Fogarty-catheter, with sham-operated rats as controls. A 9.4T-preclinical MRI system measured hourly oxygen availability (BOLD-related R2*) and perfusion (T1-weighted). After 4 hrs, tissue was collected, mitochondria isolated and assessed with high-resolution respirometry. Quantitative proteomics, qPCR, and biochemistry was performed on stored tissue/plasma. Following BD, the liver increased glycolytic gene expression (Pfk-1) with decreased glycogen stores, while the kidneys increased anaerobic- (Ldha) and decreased gluconeogenic-related gene expression (Pck-1). Hepatic oxygen consumption increased, while renal perfusion decreased. ATP levels dropped in both organs while mitochondrial respiration and complex I/ATP synthase activity were unaffected. In conclusion, the liver responds to increased metabolic demands during BD, enhancing aerobic metabolism with functional mitochondria. The kidneys shift towards anaerobic energy production while renal perfusion decreases. Our findings highlight the need for an organ-specific approach to assess and optimise graft quality prior to transplantation, to optimise hepatic metabolic conditions and improve renal perfusion while supporting cellular detoxification.

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References
1.
Weiss S, Kotsch K, Francuski M, Reutzel-Selke A, Mantouvalou L, Klemz R . Brain death activates donor organs and is associated with a worse I/R injury after liver transplantation. Am J Transplant. 2007; 7(6):1584-93. DOI: 10.1111/j.1600-6143.2007.01799.x. View

2.
Rudge C, Matesanz R, Delmonico F, Chapman J . International practices of organ donation. Br J Anaesth. 2011; 108 Suppl 1:i48-55. DOI: 10.1093/bja/aer399. View

3.
Green D, Galluzzi L, Kroemer G . Cell biology. Metabolic control of cell death. Science. 2014; 345(6203):1250256. PMC: 4219413. DOI: 10.1126/science.1250256. View

4.
Schonfeld P, Wojtczak L . Short- and medium-chain fatty acids in energy metabolism: the cellular perspective. J Lipid Res. 2016; 57(6):943-54. PMC: 4878196. DOI: 10.1194/jlr.R067629. View

5.
Herijgers P, Leunens V, Mubagwa K, Flameng W . Changes in organ perfusion after brain death in the rat and its relation to circulating catecholamines. Transplantation. 1996; 62(3):330-5. DOI: 10.1097/00007890-199608150-00005. View