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Evaluation of Bioenergetic Function in Cerebral Vascular Endothelial Cells
Published on: November 19, 2016
Mitochondrial function and cerebral blood flow variable responses to middle cerebral artery occlusion
Amir Livnat1, Efrat Barbiro-Michaely, Avraham Mayevsky
1The Mina & Everard Goodman Faculty of Life-Sciences and the Gonda Multidisciplinary Brain Research Center Bar-Ilan University, Ramat-Gan, Israel. amirtolaat@yahoo.com
Journal of Neuroscience Methods
|January 30, 2010
Summary
The middle cerebral artery occlusion (MCAO) model for stroke research shows varied outcomes. A monitoring system revealed unexpected responses in 42% of experiments, highlighting MCAO complexity.
Area of Science:
- Neuroscience
- Ischemic Stroke Research
- Mitochondrial Physiology
Background:
- Middle cerebral artery occlusion (MCAO) is a common experimental model for focal cerebral ischemia and stroke.
- Variability in MCAO protocols can lead to inconsistent study outcomes.
- Understanding diverse physiological responses in MCAO is crucial for reliable stroke research.
Purpose of the Study:
- To compare diverse mitochondrial NADH and cerebral blood flow (CBF) responses in the MCAO model.
- To investigate the variability of outcomes in focal cerebral ischemia induced by MCAO.
- To evaluate the utility of a Multi-Site-Multi-Parametric (MSMP) system in monitoring MCAO experiments.
Main Methods:
- Ninety-six Wistar rats underwent MCAO to induce focal cerebral ischemia.
- A Multi-Site-Multi-Parametric (MSMP) system monitored mitochondrial NADH (fluorometric technique) and CBF (laser Doppler flowmetry).
- Measurements were taken in the ischemic core and penumbra regions.
Main Results:
- 58% of MCAO experiments showed expected responses (decreased CBF, increased NADH).
- 42% exhibited six alternative response profiles, including variations in CBF, NADH, and tissue reflectance (Ref).
- Observed varied responses included ischemia without reperfusion, reperfusion complications, minor parameter changes, penumbral CBF elevation, and diverse reperfusion timings.
Conclusions:
- The MCAO model exhibits complex and varied responses beyond typical outcomes of mitochondrial damage and reduced blood flow.
- The MSMP monitoring system aids in the early diagnosis of successful focal cerebral ischemia.
- Implementing the MSMP system can reduce the rate of unsuccessful MCAO experiments and improve research reliability.
