Psychopharmacology

, Volume 71, Issue 2, pp 159–163 | Cite as

The influence of external sodium and potassium on lithium uptake by primary brain cell cultures at ‘therapeutic’ lithium concentration

  • Z. Janka
  • I. Szentistvanyi
  • A. Rimanoczy
  • A. Juhasz
Original Investigations

Abstract

The ionic regulating of lithium homeostasis and steady-state intra: extracellular lithium distribution in the brain can be approached by experimental methods using intact nerve cells in vitro. Primary cultures prepared from chick embryonic brain were applied to study the effect of extracellular sodium and potassium on the lithium uptake of nerve cells at ‘therapeutic’ lithium concentration (1.5 mM). Lithium influx and the level of steady-state intracellular lithium were significantly reduced by increasing the external sodium concentration. At physiological extracellular sodium level, the steady-state content of lithium in the brain cells was about half of that observed in the presence of 10 mM sodium in the incubation media and the value of the intra: extracellular lithium distribution ratio was below 1. External potassium (0.5–3 mM) strongly inhibited lithium uptake of the nerve cells. Ouabain (10-4M) had no effect on this potassiumsensitive lithium uptake in Tyrode media. Sodium influx studied by isotope tracer methodology was higher in cultures preloaded with lithium as compared to that of the controls. It can be concluded that sodium and potassium ions, at physiological concentrations, significantly influence lithium uptake as well as the intra: extracellular lithium distribution in brain cell cultures.

Key words

Lithium uptake Brain cell cultures Sodium and potassium effect Lithium homeostasis Lithium therapy 

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Copyright information

© Springer-Verlag 1980

Authors and Affiliations

  • Z. Janka
    • 1
  • I. Szentistvanyi
    • 1
  • A. Rimanoczy
    • 1
  • A. Juhasz
    • 1
  1. 1.Department of Neurology and PsychiatryUniversity Medical SchoolSzegedHungary

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