Cited by 285Cancer, Hypoxia, and MetabolismAnalytical Chemistry and SensorsOptical Imaging and Spectroscopy Techniques

Comparison of tumor and normal tissue oxygen tension measurements using OxyLite or microelectrodes in rodents

Braun, Rod D., Lanzen, Jennifer L., Snyder, Stacey A., Dewhirst, Mark W.·2001·American Journal of Physiology-Heart and Circulatory Physiology

Abstract

In this study we compare oxygen tension (Po 2) histograms measured with O 2 microelectrodes and a new optical Po 2 measurement device, the OxyLite, in normal tissues (mouse spleen and thymus) and in tumors (R3230Ac in rats) ( n = 5–6). The transient response to glucose infusion or 100% O 2 breathing (hyperoxia) was also measured in tumors. Po 2 histograms of spleen and thymus with the two devices were not different. The OxyLite tumor Po 2 histogram, however, was left-shifted compared with the microelectrode (median Po 2 1.0 vs. 4.0 mmHg, P = 0.016). Both probes responded to acute hyperglycemia with a mean increase of 3–6 mmHg, but the microelectrode change was not significant. The OxyLite consistently recorded large Po 2 increases (∼28 mmHg) with hyperoxia, whereas the microelectrode response was variable. The OxyLite averages Po 2 over an area that contains interstitial and vascular components, whereas the microelectrode measures a more local Po 2. This study demonstrates the importance of considering the features of the measurement device when studying tissues with heterogeneous Po 2 distributions (e.g., tumors).

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Crossref · 10.1152/ajpheart.2001.280.6.h2533

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Authors
Braun, R. D., Lanzen, J. L., Snyder, S. A., & Dewhirst, M. W.
Affiliations
Duke Medical Center (US)
Venue
American Journal of Physiology-Heart and Circulatory Physiology
Published
2001-06-01
Volume
280
Issue
6
Pages
H2533-H2544
ISSN
  • 0363-6135 (ISSN-L)
  • 1522-1539
OpenAlex
W1842875237
Cited by
285
References
40
Citations by year
2026: 5 · 2025: 4 · 2024: 11 · 2023: 5 · 2022: 16 · 2021: 14 · 2020: 19 · 2019: 8 · 2018: 4 · 2017: 8 · 2016: 8 · 2015: 10 · 2014: 14 · 2013: 18 · 2012: 19
FWCI
4.62
Type
journal article
Language
en
Open access
closed
Locations
  • American Journal of Physiology-Heart and Circulatory Physiology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Hypoxia, and Metabolism
  • Physical Sciences › Chemical Engineering › Bioengineering › Analytical Chemistry and Sensors
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Optical Imaging and Spectroscopy Techniques
Keywords
tissue oxygen tension, tumor hypoxia, oxygen microelectrodes, spleen, thymus, hyperoxia, glucose infusion
MeSH terms
Adenocarcinoma, Administration, Inhalation, Animals, Female, Glucose, Infusions, Intravenous, Mammary Neoplasms, Experimental, Mice, Inbred DBA, Microelectrodes, Neoplasm Transplantation, Oxygen, Partial Pressure, Polarography, Rats, Inbred F344, Spleen, Thymus Gland, Reproducibility of Results, Cell Hypoxia, Mice, Rats

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