Datzmann 2019 J Neurosurg

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Datzmann T, Kapapa T, Scheuerle A, McCook O, Merz T, Unmuth S, Hoffmann A, Mathieu R, Mayer S, Mauer UM, Roehrer S, Yilmazer-Hanke D, Moeller P, Nussbaum BL, Calzia E, Groeger M, Hartmann C, Radermacher P, Wepler M (2019) In-depth characterization of a long-term, resuscitated model of acute subdural hematoma-induced brain injury. J Neurosurg [Epub ahead of print].

» PMID: 31860806

Datzmann T, Kapapa T, Scheuerle A, McCook O, Merz T, Unmuth S, Hoffmann A, Mathieu R, Mayer S, Mauer UM, Roehrer S, Yilmazer-Hanke D, Moeller P, Nussbaum BL, Calzia E, Groeger M, Hartmann C, Radermacher P, Wepler M (2019) J Neurosurg

Abstract: Acute subdural hematoma (ASDH) is a leading entity in brain injury. Rodent models mostly lack standard intensive care, while large animal models frequently are only short term. Therefore, the authors developed a long-term, resuscitated porcine model of ASDH-induced brain injury and report their findings.

Anesthetized, mechanically ventilated, and instrumented pigs with human-like coagulation underwent subdural injection of 20 mL of autologous blood and subsequent observation for 54 hours. Continuous bilateral multimodal brain monitoring (intracranial pressure [ICP], cerebral perfusion pressure [CPP], partial pressure of oxygen in brain tissue [PbtO2], and brain temperature) was combined with intermittent neurological assessment (veterinary modified Glasgow Coma Scale [MGCS]), microdialysis, and measurement of plasma protein S100β, GFAP, neuron-specific enolase [NSE], nitrite+nitrate, and isoprostanes. Fluid resuscitation and continuous intravenous norepinephrine were targeted to maintain CPP at pre-ASDH levels. Immediately postmortem, the brains were taken for macroscopic and histological evaluation, immunohistochemical analysis for nitrotyrosine formation, albumin extravasation, NADPH oxidase 2 (NOX2) and GFAP expression, and quantification of tissue mitochondrial respiration.

Nine of 11 pigs survived the complete observation period. While ICP significantly increased after ASDH induction, CPP, PbtO2, and the MGCS score remained unaffected. Blood S100β levels significantly fell over time, whereas GFAP, NSE, nitrite+nitrate, and isoprostane concentrations were unaltered. Immunohistochemistry showed nitrotyrosine formation, albumin extravasation, NOX2 expression, fibrillary astrogliosis, and microglial activation.

The authors describe a clinically relevant, long-term, resuscitated porcine model of ASDH-induced brain injury. Despite the morphological injury, maintaining CPP and PbtO2 prevented serious neurological dysfunction. This model is suitable for studying therapeutic interventions during hemorrhage-induced acute brain injury with standard brain-targeted intensive care.

Keywords: GFAP, MAP-2, Mitochondrial respiration, Oxidative stress, Multimodal brain monitoring, Trauma Bioblast editor: Plangger M O2k-Network Lab: DE Ulm Radermacher P


Labels: MiParea: Respiration  Pathology: Other 

Organism: Pig  Tissue;cell: Nervous system  Preparation: Homogenate 


Coupling state: LEAK, OXPHOS, ET  Pathway: N, NS  HRR: Oxygraph-2k 

Labels, 2020-01