Related Experiment Videos

Ouabain induces apoptosis on PHA-activated lymphocytes

B Olej1, N F dos Santos, L Leal

  • 1Departamento de Bioquímica Médica, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Brazil.

Bioscience Reports
|July 8, 1998
PubMed

Insights

Ouabain, a Na+K(+)-ATPase inhibitor, increases c-myc mRNA expression and triggers apoptosis in stimulated lymphocytes. This effect is independent of interleukin-2 (IL-2).

Area of Science:

  • Immunology
  • Cell Biology
  • Pharmacology

Background:

  • Apoptotic cell death is crucial for immune system homeostasis.
  • Deregulated c-myc protooncogene expression is linked to programmed cell death.
  • Modulating lymphocyte apoptosis has significant therapeutic potential.

Purpose of the Study:

  • To investigate the effect of ouabain on c-myc expression and apoptosis in lymphocytes.
  • To determine if interleukin-2 (IL-2) can counteract ouabain-induced apoptosis.

Main Methods:

  • Lymphocytes were stimulated with phytohemagglutinin (PHA).
  • Cells were treated with ouabain, a specific inhibitor of Na+K(+)-ATPase.
  • c-myc mRNA expression was measured.
  • Apoptosis was assessed.
  • The effect of exogenous IL-2 was evaluated.

Main Results:

  • Ouabain treatment led to increased c-myc mRNA expression.
  • Ouabain induced apoptosis in PHA-stimulated lymphocytes.
  • Exogenous IL-2 did not prevent ouabain-induced apoptosis.

Conclusions:

  • Ouabain promotes apoptosis in lymphocytes via c-myc upregulation.
  • The Na+K(+)-ATPase pathway is involved in regulating lymphocyte apoptosis.
  • IL-2 does not inhibit ouabain-induced lymphocyte apoptosis.

Related Concept Videos