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The influence of hyperbaric oxygenation on leukocyte viability and surface protein expression
K M McIntyre1, P S Dixon, L P Krock
1Davis Hyperbaric Laboratory, Brooks AFB, Texas, USA.
Aviation, Space, and Environmental Medicine
|December 31, 1997
Summary
Hyperbaric oxygenation reduced HL60 cell proliferation and viability. It also altered cell surface markers, indicating a role for oxygen tension in regulating cell cycle and protein expression.
Area of Science:
- Cell Biology
- Hematology
- Biochemistry
Background:
- Hyperbaric oxygenation (HBO) involves breathing pure oxygen at higher than atmospheric pressure.
- Oxygen tension is known to influence cell cycle regulation and protein expression.
- Promyelocytic leukemic HL60 cells are a standard model for studying myeloid differentiation.
Purpose of the Study:
- To investigate the effects of hyperbaric oxygenation on the growth and differentiation of HL60 cells.
- To analyze changes in cell proliferation, viability, and surface marker expression under HBO conditions.
Main Methods:
- HL60 cells were exposed to hyperbaric oxygen, normal oxygen, or carbon dioxide for 72 hours.
- Cell proliferation and viability were assessed.
- Expression levels of various cell surface markers (CD markers and HLA-DR) were analyzed using flow cytometry.
Main Results:
- Hyperbaric oxygenation significantly decreased the proliferation rate and viability of HL60 cells compared to controls (p < 0.05).
- HBO treatment led to decreased expression of CD13 and CD38.
- HBO treatment increased the expression of CD11b, CD14, and CD16, while CD10, CD15, and HLA-DR remained unchanged.
Conclusions:
- Hyperbaric oxygenation negatively impacts HL60 cell proliferation and viability.
- HBO induces specific changes in cell surface marker expression, suggesting modulation of myeloid differentiation.
- These findings reinforce the critical role of oxygen tension in regulating cellular processes like cell cycle and protein expression.