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Proceedings Paper

Changes in quantitative oxygen uptake rate and redox state of cytochromes as a function of normal, critical, and anoxic conditions
Author(s): Klaus H. Frank; Valerie Steinbach; Marc Dammann; Manfred D. Kessler
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Paper Abstract

Isolated mitochondria were used to investigate quantitative oxygen uptake rate during oxidative phosphorylation. At the PO2 of 70 mmHg the reaction was initiated. During the initial part of oxidative phosphorylation the turnover rate increased. The recorded PO2 slope decayed linearly over time from 60 to about 10 mmHg, which is correlated to a constant oxygen uptake rate. Below 10 mmHg the PO2 deviated from linearity indicating a decreasing O2 uptake of mitochondria. No change in redox state of respiratory enzymes was observed. At very low PO2 values the scattering of mitochondria decreased and finally at total anoxia a very fast drop of backscattered light intensity and a total reduction of cytochrome was observed.

Paper Details

Date Published: 5 June 2002
PDF: 7 pages
Proc. SPIE 4623, Functional Monitoring and Drug-Tissue Interaction, (5 June 2002); doi: 10.1117/12.469463
Show Author Affiliations
Klaus H. Frank, Dornier MedTech America (United States)
Valerie Steinbach, Friedrich-Alexander-Univ. Erlangen-Nuernberg (Germany)
Marc Dammann, Friedrich-Alexander-Univ. Erlangen-Nuernberg (Germany)
Manfred D. Kessler, Friedrich-Alexander-Univ. Erlangen-Nuernberg (Germany)

Published in SPIE Proceedings Vol. 4623:
Functional Monitoring and Drug-Tissue Interaction
Manfred D. Kessler; Gerhard J. Mueller, Editor(s)

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