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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Effect of lonidamine on the energy metabolism of Ehrlich ascites tumor cells.

The action of Lonidamine [1-(2,4-dichlorobenzyl)-1-H-indazol-3-carboxylic acid] on oxygen consumption and the rate of aerobic and anaerobic lactate production by Ehrlich ascites tumor cells has been investigated. The rate of oxygen consumption decreases exponentially with the increase of Lonidamine concentration, with maximal inhibition occurring at 0.40 mM Lonidamine. The rate of aerobic lactate production is inhibited to the same extent as is the oxygen consumption. However, the maximum effect is observed at 0.12 mM Lonidamine, and the decrease is linear with Lonidamine concentration. Anaerobic lactate production is more sensitive to Lonidamine, and complete inhibition can be observed by raising the concentration to 0.6 mM. The possibility that the decrease observed in lactate production was secondary to the inhibition of sodium- and potassium-containing adenosinetriphosphatase was excluded, because the drug has no effect on this enzyme. Mitochondrial adenosinetriphosphatase was not affected. Lonidamine was, however, shown to inhibit the activity of mitochondrially bound hexokinase to approximately the same extent as it inhibited aerobic glycolysis (approximately 70%). It is concluded that inhibition of the glycolysis of Ehrlich ascites tumor cells by Lonidamine results from an effect of the drug on the mitochondrially bound hexokinase.[1]


  1. Effect of lonidamine on the energy metabolism of Ehrlich ascites tumor cells. Floridi, A., Paggi, M.G., D'Atri, S., De Martino, C., Marcante, M.L., Silvestrini, B., Caputo, A. Cancer Res. (1981) [Pubmed]
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