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Detection of Microregional Hypoxia in Mouse Cerebral Cortex by Two-photon Imaging of Endogenous NADH Fluorescence
Published on: February 21, 2012
Cerebral microcirculation and oxygen tension in the human secondary cortex
A A Linninger1, I G Gould, T Marrinan
1Department of Bioengineering, University of Illinois at Chicago, 851 S. Morgan St, 218 SEO, M/C 063, Chicago, IL, 60607-7000, USA, linninge@uic.edu.
Annals of Biomedical Engineering
|July 12, 2013
Summary
This study created a 3D computer model of the human cortex microcirculation to simulate oxygen exchange. The model accurately predicts oxygen tension and gradients in blood vessels and brain tissue, validating against real-world data.
Area of Science:
- Neuroscience
- Biophysics
- Computational Biology
Background:
- The three-dimensional structure of the cortical microcirculation is vital for understanding oxygen transport between blood and brain cells.
- Accurate modeling of this system is essential for comprehending brain metabolism and function.
Purpose of the Study:
- To develop a comprehensive 3D computer model of the human secondary cortex microcirculation.
- To quantify oxygen advection, tissue perfusion, and consumption within the cortical microvasculature.
- To validate the model's predictions against established morphometric and physiological data.
Main Methods:
- Construction of a 3D computer model representing a 3x3x3 mm(3) human cortical subsection.
- Inclusion of all arterial, capillary, and venous blood vessels, and extravascular brain tissue.
- Utilizing optimization algorithms for microvessel assembly mimicking angiogenic growth and space-filling procedures for capillary beds.
- Modeling extravascular tissue as a porous medium with oxygen supply via advection-diffusion.
Main Results:
- The generated network accurately replicates measured morphometrics and fractal patterns of cortical microvasculature.
- The model successfully predicts oxygen exchange between cortical blood vessels and surrounding gray matter.
- Computed oxygen tension and gradients in blood and tissue align with in vivo imaging study trends.
Conclusions:
- The developed 3D computational network provides a physiologically consistent and morphologically accurate representation of cerebral microcirculation.
- This model enables accurate prediction of oxygen exchange dynamics in the human cortex.
- The findings support the use of such models for understanding brain oxygen metabolism and validating experimental observations.
