Summary
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1.
Proliferation of in vitro grown Ehrlich ascites tumor cells is completely inhibited by 0.2–0.4 mM methylglyoxal and 1–2mM glucosone or galactosone without severely affecting viability (dye exclusion test); no phase-specific arrest of cell growth is observed.
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2.
Incorporation of [14C] thymidine into the acid-insoluble fraction of the cells decreases within a few minutes to less than 50% of that in controls in the presence of 0.4 mM methylglyoxal, and 2 mM glucosone or galactosone causes a comparable inhibition of DNA synthesis after 2 h or 4 h, respectively.
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3.
The action of 0.4 mM methylglyoxal inhibits incorporation of [14C] leucine within a few minutes by more than 70%, while 2 mM glucosone and galactosone are significantly less effective (50%–60% inhibition after 12 h).
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4.
While methylglyoxal and galactosone do not severely affect lactate production of the cells, 2 mM glucosone reduces glycolysis by 60%–70%; ATP/ADP ratios did not fall below 3.5 in the presence of the inhibitors (controls 4–6).
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5.
It is suggested that the reaction potentialities of the oxaldehyde function of the inhibitors play an important role in their growth-inhibitory acitivity, besides exerting a specific effect on hexokinase (glucosone) and UTP-trapping activity.
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Dedicated to Prof. H. Witzel on the occasion of his 60th birthday
This work was supported by the Deutsche Forschungsgemeinschaft, Sonderforschungsbereich “Zellenergetik und Zelldifferenzierung”
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Reiffen, K.A., Schneider, F. A comparative study on proliferation, macromolecular synthesis and energy metabolism of in vitro-grown ehrlich ascites tumor cells in the presence of glucosone, galactosone and methylglyoxal. J Cancer Res Clin Oncol 107, 206–210 (1984). https://doi.org/10.1007/BF01032608
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DOI: https://doi.org/10.1007/BF01032608