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. 1984 May;49(5):587–593. doi: 10.1038/bjc.1984.93

Modulation of tumour cell colony growth in soft agar by oxygen and its mechanism.

V Gupta, R Eberle
PMCID: PMC1976732  PMID: 6326792

Abstract

A simple technique for maintaining low oxygen concentrations (0.1-20%) is described. These conditions were then used to study the effect of oxygen on colony growth of neoplastic cells in soft-agar. Physiologically low oxygen concentrations (0.1-10%) compared to 20% O2 were found to enhance plating efficiency and colony size of tumour cells. The optimal oxygen concentration for plating efficiency varied with tumour studied and may be as low as 0.1%. Having established that tumour cell colonies will grow better at 0.1-10% O2 compared to 20% O2, the mechanism by which this enhancement occurs was investigated. Observations on the effect of free radical scavengers and superoxide dismutase on plating efficiency of Ehrlich's ascites tumour cells suggests that this phenomenon occurs through oxygen toxicity mediated by superoxide anion.

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Selected References

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