Effects of pH Regulation Inhibitors on Tumors
Author Information
Author(s): K. Newell, P. Wood, I. Stratford, I. Tannock
Primary Institution: University of Toronto and Experimental Therapeutics Division, Ontario Cancer Institute
Hypothesis
Can agents that inhibit intracellular pH regulation effectively kill murine solid tumors?
Conclusion
The combination of nigericin and hydralazine can kill cells in rodent solid tumors by reducing their intracellular pH.
Supporting Evidence
- The mean extracellular pH of the KHT fibrosarcoma and the EMT-6 sarcoma were observed to be more acidic than normal muscle tissue.
- Nigericin combined with amiloride and hydralazine reduced the surviving fraction of cells in tumors.
- Hydralazine caused a decrease in tumor pH, which may enhance the effectiveness of other treatments.
Takeaway
This study found that certain drugs can help kill cancer cells by making the environment inside the cells more acidic.
Methodology
The study involved administering various agents to murine tumors and measuring their effects on cell survival and tumor growth.
Limitations
The study did not demonstrate significant in vivo toxicity of CCCP and the effects of hydralazine were limited to specific tumor types.
Participant Demographics
The study used inbred female C3H/HeJ and BALB/c BYJ mice.
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