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Related Experiment Videos

Ehrlich tumour cells: Ca(2+)-uptake modification by aluminium lactate.

L J Anghileri1

  • 1Biophysics Laboratory, Faculty of Medicine, University of Nancy, France.

Cell Calcium
|May 1, 1992
PubMed
Summary

Aluminium lactate increases calcium uptake in tumor cells, similar to ferric lactate. This effect, linked to plasma membrane changes, differs from chromic lactate, which has no impact.

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Toxicology

Background:

  • Calcium (Ca2+) uptake is crucial for cellular functions.
  • Metal lactate complexes can influence cellular processes.
  • Ehrlich ascites tumor cells are a model for studying cellular responses to compounds.

Purpose of the Study:

  • To investigate the effect of aluminium lactate on 45Ca2+ uptake by Ehrlich ascites tumor cells.
  • To compare the effects of aluminium lactate with ferric lactate and chromic lactate.
  • To elucidate the mechanism behind aluminium lactate's influence on calcium uptake.

Main Methods:

  • Utilizing 45Ca2+ as a tracer to quantify calcium uptake.
  • Employing Ehrlich ascites tumor cells as the experimental model.
  • Varying metal-complex concentrations and assessing inhibition by albumin.

Main Results:

  • Aluminium lactate significantly modified 45Ca2+ uptake in a concentration-dependent manner.
  • The effect of aluminium lactate was partially inhibited by albumin, unlike ferric lactate.
  • Chromic lactate did not alter 45Ca2+ uptake under the tested conditions.
  • A likely mechanism involves increased plasma membrane rigidity due to aluminium binding to phospholipids.

Conclusions:

  • Aluminium lactate alters calcium homeostasis in tumor cells.
  • The mechanism involves plasma membrane alterations, suggesting potential toxicological relevance.
  • Differential effects of metal lactates highlight the importance of metal speciation in biological interactions.

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