The mechanism of glycolysis inhibition by x-rays in ascites-tumour cells: I. 
Alteration in steady-state concentrations of some intermediate nucleotides and 
in electrolyte equilibrium under various conditions of incubation

Dose, Klaus; Dose, Ursula

doi:10.1080/09553006114550971

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The mechanism of glycolysis inhibition by x-rays in ascites-tumour cells: I. Alteration in steady-state concentrations of some intermediate nucleotides and in electrolyte equilibrium under various conditions of incubation

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Dose, Ursula
Max Planck Institute of Biophysics, Max Planck Society;

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Citation

Dose, K., & Dose, U. (1961). The mechanism of glycolysis inhibition by x-rays in ascites-tumour cells: I. Alteration in steady-state concentrations of some intermediate nucleotides and in electrolyte equilibrium under various conditions of incubation. International Journal of Radiation Biology, 4(1), 85-95. doi:10.1080/09553006114550971.

Cite as: https://hdl.handle.net/21.11116/0000-0008-FA99-2

Abstract

The anaerobic glycolysis of Ehrlich ascites-tumour cells is inhibited in vitro by x-rays. For lower doses (25 kr) this inhibition is reversible, and an increase of triose and hexose phosphates has been found. With increasing dose (over 50 kr) the resulting inhibition becomes more irreversible, and the triose and hexose phosphate concentrations fall far below the normal values. In all cases, we observed a dose-dependent decrease in ATP and DPN with a slightly S-shaped dose-effect curve, as well as an increase in the potassium-diffusion. The effect of irradiation on the alteration of transport equilibria, and the corresponding decrease of Q^N2_LA values, can be greatly reduced if metabolism is increased by adding inorganic phosphate, ATP and ADP. However, the relative alterations in triose and hexose phosphates, ATP and DPN concentrations caused by x-irradiation, remain largely unchanged by this increase. With increasing x-ray doses, phosphate-splitting enzymes are activated. A large part of DPN is already radiation-chemically destroyed.