Nifedipine and Tumor Blood Flow
Author Information
Author(s): Thews O, Hummel M, Kelleher D K, Lecher B, Vaupel P
Primary Institution: Institute of Physiology and Pathophysiology, University of Mainz
Hypothesis
Can nifedipine improve blood flow and oxygenation status of tumors during isolated limb perfusion?
Conclusion
Nifedipine significantly improves tumor perfusion but does not substantially reduce tumor hypoxia.
Supporting Evidence
- Nifedipine increased perfusion rate by 100% and RBC flux by 60%.
- Despite increased oxygen availability, tumor hypoxia was not significantly reduced.
- Application of nifedipine did not lead to 'steal phenomena' favoring normal tissue.
Takeaway
Nifedipine helps blood flow to tumors but doesn't make them get more oxygen.
Methodology
Isolated limb perfusion was performed on rats with DS-sarcoma, and nifedipine was infused to assess its effects on blood flow and oxygenation.
Limitations
The study was conducted on a small animal model, which may not fully represent human responses.
Participant Demographics
Male Sprague Dawley rats, body weight 200–320 g.
Digital Object Identifier (DOI)
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