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alpha-tocopheryl succinate-induced apoptosis in Jurkat T cells involves caspase-3 activation, and both lysosomal and

J Neuzil1, I Svensson, T Weber

  • 1Institute for Prevention of Cardiovascular Diseases, Ludwig Maximilians University, Munich, Germany. jneuzil@klp.med.uni-muenchen.de

FEBS Letters
|March 27, 1999
PubMed

Insights

Alpha-Tocopheryl succinate (alpha-TOS) induces apoptosis in Jurkat T cells by activating caspase-3 and destabilizing lysosomes. This vitamin E derivative shows promise in eliminating malignant cells.

Area of Science:

  • Cell Biology
  • Biochemistry
  • Immunology

Background:

  • Vitamin E derivatives are investigated for therapeutic potential.
  • Apoptosis plays a crucial role in cellular homeostasis and disease.
  • Jurkat T cells are a relevant model for studying T cell apoptosis.

Purpose of the Study:

  • To investigate the apoptotic effects of alpha-Tocopheryl succinate (alpha-TOS) on Jurkat T cells.
  • To elucidate the mechanisms underlying alpha-TOS-induced apoptosis.

Main Methods:

  • Treatment of Jurkat T cells with varying concentrations of alpha-TOS.
  • Assessment of apoptosis using caspase-3 activation assays.
  • Evaluation of lysosomal membrane integrity via acridine orange uptake.
  • Measurement of mitochondrial membrane potential.

Main Results:

  • Alpha-TOS, but not alpha-tocopherol, induced apoptosis in a time- and concentration-dependent manner.
  • Caspase-3 activation was observed at 50 microM alpha-TOS.
  • Alpha-TOS treatment led to lysosomal destabilization and decreased mitochondrial membrane potential.
  • Apoptotic features mimicked those induced by Fas receptor cross-linking.

Conclusions:

  • Alpha-TOS effectively induces apoptosis in Jurkat T cells through lysosomal and mitochondrial pathways.
  • The findings support the role of vitamin E in cancer therapy via apoptosis induction.
  • Alpha-TOS-induced apoptosis may have significant (patho)physiological implications.

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