Abstract:
:This study demonstrates the use of optical spectroscopy for monitoring tumor oxygenation and metabolism in response to hyperoxic gas breathing. Hemoglobin saturation and redox ratio were quantified for a set of 14 and 9 mice, respectively, measured at baseline and during carbogen breathing (95% O(2), 5% CO(2)). In particular, significant increases in hemoglobin saturation and fluorescence redox ratio were observed upon carbogen breathing. These data were compared with data obtained concurrently using an established invasive technique, the OxyLite partial oxygen pressure (pO(2)) system, which also showed a significant increase in pO(2). It was found that the direction of changes were generally the same between all of the methods, but that the OxyLite system was much more variable in general, suggesting that optical techniques may provide a better assessment of global tumor physiology. Optical spectroscopy measurements are demonstrated to provide a reliable, reproducible indication of changes in tumor physiology in response to physiologic manipulation.
journal_name
J Biomed Optjournal_title
Journal of biomedical opticsauthors
Palmer GM,Viola RJ,Schroeder T,Yarmolenko PS,Dewhirst MW,Ramanujam Ndoi
10.1117/1.3103586subject
Has Abstractpub_date
2009-03-01 00:00:00pages
024010issue
2eissn
1083-3668issn
1560-2281journal_volume
14pub_type
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journal_title:Journal of biomedical optics
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