Bcl-2 over-expression and activation of protein kinase C suppress the trail-induced apoptosis in Jurkat T cells

Cell Res. 2001 Jun;11(2):101-6. doi: 10.1038/sj.cr.7290074.

Abstract

Trail, a tumor necrosis factor-related apoptosis-inducing ligand, is a novel potent endogenous activator of the cell death pathway through the activation of cell surface death receptors Trail-R1 and Trail-R2. Its role, like FasL in activation-induced cell death (AICD), has been demonstrated in immune system. However the mechanism of Trail induced apoptosis remains unclear. In this report, the recombinant Trail protein was expressed and purified. The apoptosis-inducing activity and the regulation mechanism of recombinant Trail on Jurkat T cells were explored in vitro. Trypan blue exclusion assay demonstrated that the recombinant Trail protein actively killed Jurkat T cells in a dose-dependent manner. Trail-induced apoptosis in Jurkat T cells were remarkably reduced by Bcl-2 over expression in Bcl-2 gene transfected cells. Treatment with PMA (phorbol 12-myristate 13-acetate), a PKC activator, suppressed Trail-induced apoptosis in Jurkat T cells. The inhibition of apoptosis by PMA was abolished by pretreatment with Bis, a PKC inhibitor. Taken together, it was suggested that Bcl-2 over-expression and PMA activated PKC actively down-regulated the Trail-mediated apoptosis in Jurkat T cell.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Apoptosis / drug effects
  • Apoptosis / physiology*
  • Apoptosis Regulatory Proteins
  • Carcinogens / pharmacology
  • Gene Expression Regulation / drug effects
  • Gene Expression Regulation / physiology*
  • Humans
  • Interleukin-2 / pharmacology
  • Jurkat Cells / cytology
  • Jurkat Cells / drug effects
  • Jurkat Cells / metabolism*
  • Lipopolysaccharides / pharmacology
  • Membrane Glycoproteins / genetics
  • Membrane Glycoproteins / isolation & purification
  • Membrane Glycoproteins / pharmacology*
  • Protein Kinase C / antagonists & inhibitors
  • Protein Kinase C / metabolism*
  • Proto-Oncogene Proteins c-bcl-2 / genetics*
  • Recombinant Proteins / genetics
  • Recombinant Proteins / isolation & purification
  • Recombinant Proteins / pharmacology
  • TNF-Related Apoptosis-Inducing Ligand
  • Tetradecanoylphorbol Acetate / pharmacology
  • Transfection
  • Tumor Necrosis Factor-alpha / genetics
  • Tumor Necrosis Factor-alpha / isolation & purification
  • Tumor Necrosis Factor-alpha / pharmacology*

Substances

  • Apoptosis Regulatory Proteins
  • Carcinogens
  • Interleukin-2
  • Lipopolysaccharides
  • Membrane Glycoproteins
  • Proto-Oncogene Proteins c-bcl-2
  • Recombinant Proteins
  • TNF-Related Apoptosis-Inducing Ligand
  • TNFSF10 protein, human
  • Tumor Necrosis Factor-alpha
  • Protein Kinase C
  • Tetradecanoylphorbol Acetate