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. 1981 Mar;43(3):350–354. doi: 10.1038/bjc.1981.55

Cytotoxicity of metronidazole (Flagyl) and misonidazole (Ro-07-0582): enhancement by lactate.

J S Mahood, R L Willson
PMCID: PMC2010608  PMID: 7225286

Abstract

The cytotoxic activity of metronidazole (Flagyl) and misonidazole (MISO) to hypoxic Chinese hamster ovary (CHO) cells suspended in standard medium in sealed vials and in gassed spinner flasks has been investigated. Flagyl (5 mM) was only cytotoxic at high initial cell densities. However, when lactate (20 mM) was included in the medium the cytotoxicity of Flagyl at low cell densities was considerable, and similar to that of misonidazole under the same conditions. The relevance of this "lactate effect" to in vivo systems, and the possible mechanisms involved, are discussed.

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Selected References

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