Moroz, T; Banaji, M; Robertson, NJ; Cooper, CE; Tachtsidis, I; (2012) Computational modelling of the piglet brain to simulate near-infrared spectroscopy and magnetic resonance spectroscopy data collected during oxygen deprivation. Journal of the Royal Society Interface , 9 (72) 1499 - 1509. 10.1098/rsif.2011.0766.
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We describe a computational model to simulate measurements from near-infrared spectroscopy (NIRS) and magnetic resonance spectroscopy (MRS) in the piglet brain. Piglets are often subjected to anoxic, hypoxic and ischaemic insults, as experimental models for human neonates. The model aims to help interpret measurements and increase understanding of physiological processes occurring during such insults. It is an extension of a previous model of circulation and mitochondrial metabolism. This was developed to predict NIRS measurements in the brains of healthy adults i.e. concentration changes of oxyhaemoglobin and deoxyhaemoglobin and redox state changes of cytochrome c oxidase (CCO). We altered and enhanced the model to apply to the anaesthetized piglet brain. It now includes metabolites measured by (31)P-MRS, namely phosphocreatine, inorganic phosphate and adenosine triphosphate (ATP). It also includes simple descriptions of glycolysis, lactate dynamics and the tricarboxylic acid (TCA) cycle. The model is described, and its simulations compared with existing measurements from piglets during anoxia. The NIRS and MRS measurements are predicted well, although this requires a reduction in blood pressure autoregulation. Predictions of the cerebral metabolic rate of oxygen consumption (CMRO(2)) and lactate concentration, which were not measured, are given. Finally, the model is used to investigate hypotheses regarding changes in CCO redox state during anoxia.
|Title:||Computational modelling of the piglet brain to simulate near-infrared spectroscopy and magnetic resonance spectroscopy data collected during oxygen deprivation.|
|Open access status:||An open access publication. A version is also available from UCL Discovery.|
|Additional information:||This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. PMCID: PMC3367814|
|Keywords:||Animals, Brain, Brain Chemistry, Brain Ischemia, Electron Transport Complex IV, Humans, Magnetic Resonance Spectroscopy, Models, Biological, Oxidation-Reduction, Oxygen Consumption, Spectroscopy, Near-Infrared, Swine|
|UCL classification:||UCL > School of Life and Medical Sciences > Faculty of Population Health Sciences > Institute for Women's Health > Neonatology|
UCL > School of BEAMS > Faculty of Engineering Science > Medical Physics and Bioengineering
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