Reanalysis of the involvement of γ-glutamyl transpeptidase in the cell activation process

Christophe Antczak, David R. Karp, Robert E. London, Brigitte Bauvois

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


The inhibitor of γ-glutamyl transpeptidase (γ-GT) acivicin modulates cellular responses including growth, myeloid maturation and apoptosis. Whether these effects result from the inhibition of γ-GT enzyme activity remains unclear. We compared the cellular effects of acivicin against a more potent and specific inhibitor of γ-GT (L-2-amino-4-boronobutanoic acid (L-ABBA)) in γ-GT-negative (B lymphoblastoid Ramos) and γ-GT-positive (myelomonocytic HL-60, γ-GT-transfected Ramos) cell lines. Under non-oxidative stress conditions, acivicin-induced cell growth arrest, apoptosis and macrophage maturation occurred independent of γ-GT while L-ABBA did not influence any of these processes. Acivicin triggered tyrosine phosphorylation and increased nuclear factor κB activity. Further insight into the role of γ-GT in cellular processes is needed.

Original languageEnglish (US)
Pages (from-to)226-230
Number of pages5
JournalFEBS Letters
Issue number2
StatePublished - Nov 16 2001


  • Acivicin
  • Apoptosis
  • Differentiation
  • Ectoprotease
  • Proliferation
  • Signaling

ASJC Scopus subject areas

  • Biophysics
  • Structural Biology
  • Biochemistry
  • Molecular Biology
  • Genetics
  • Cell Biology


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