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Related Experiment Video

Updated: May 18, 2026

Evaluation of Bioenergetic Function in Cerebral Vascular Endothelial Cells

Evaluation of Bioenergetic Function in Cerebral Vascular Endothelial Cells

Published on: November 19, 2016

Cerebral energy metabolism during induced mitochondrial dysfunction.

T H Nielsen¹, T T Bindslev, S M Pedersen

¹Department of Anaesthesiology, Odense University Hospital, Odense C, Denmark.

Acta Anaesthesiologica Scandinavica

|September 29, 2012

Summary

Mitochondrial dysfunction in the brain can be detected at the bedside by monitoring brain oxygen and lactate levels. This method distinguishes dysfunction from cerebral ischemia in piglets.

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Evaluation of Bioenergetic Function in Cerebral Vascular Endothelial Cells

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Published on: November 19, 2016

Analysis of Brain Mitochondria Using Serial Block-Face Scanning Electron Microscopy

Analysis of Brain Mitochondria Using Serial Block-Face Scanning Electron Microscopy

Published on: July 9, 2016

Area of Science:

Neuroscience
Metabolism Research
Critical Care Medicine

Background:

Impaired cerebral oxidative energy metabolism is implicated in tissue damage following traumatic brain injury and stroke.
Mitochondrial dysfunction may be a key factor in neurological damage.
Bedside diagnosis of mitochondrial dysfunction could improve patient outcomes.

Purpose of the Study:

To investigate the potential of simultaneous monitoring of brain tissue oxygen tension (PbtO(2)) and cerebral cytoplasmatic redox state for diagnosing mitochondrial dysfunction.
To describe cerebral energy metabolism during sevoflurane-induced mitochondrial dysfunction in piglets.

Main Methods:

Ten piglets were used: seven in the sevoflurane-induced experimental group and three in the midazolam-anesthetized control group.
Intracerebral microdialysis was employed to monitor bilateral PbtO(2), glucose, lactate, and pyruvate levels.
Cerebral energy metabolism was assessed under conditions of induced mitochondrial dysfunction.

Main Results:

Mitochondrial dysfunction was observed in the sevoflurane group, evidenced by significantly lower cerebral glucose and higher lactate and lactate/pyruvate ratio compared to controls.
Pyruvate and PbtO(2) remained within normal ranges in both groups.
Early detection of mitochondrial dysfunction was possible, with metabolic changes present from the start of monitoring.

Conclusions:

Intracerebral microdialysis can diagnose mitochondrial dysfunction by detecting increased cerebral lactate and lactate/pyruvate ratio with normal pyruvate and PbtO(2).
This metabolic signature differs from cerebral ischemia, which shows decreased PbtO(2) and pyruvate.
The findings suggest a novel bedside diagnostic approach for mitochondrial dysfunction in neurological conditions.