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Potentiation of in vitro ara-C cytotoxicity by ribonucleotide reductase inhibitors, cyclin-dependent kinase modulators and the DNA repair inhibitor aphidicolin in paediatric acute myeloid leukaemia

  • I. Hubeek
  • , G. J. Peters
  • , A. J.F. Broekhuizen
  • , J. Sargent
  • , B. E.S. Gibson
  • , U. Creutzig
  • , G. J.L. Kaspers

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

To modulate in vitro cytarabine (ara-C) resistance we combined ara-C with six potential resistance modifiers in 10 paediatric acute myeloid leukaemia (AML) patient samples (methyl thiazol tetrazolium assay). Drug interactions were determined by median drug effect analysis. Co-incubation of ara-C/aphidicolin showed strong synergism. The combinations of ara-C/cladribine and ara-C/gemcitabine were synergistic. Nearly additive and moderately synergistic interactions were observed between ara-C/flavopiridol and ara-C/UCN-01. The combination of ara-C/decitabine was antagonistic. In conclusion, favourable interactions were observed between ara-C and aphidicolin, cladribine, gemcitabine and also with flavopiridol and UCN-01, supporting the evaluation of these combinations in clinical trials with AML patients.

Original languageEnglish
Pages (from-to)219-222
Number of pages4
JournalBritish journal of haematology
Volume131
Issue number2
DOIs
Publication statusPublished - Oct 2005
Externally publishedYes

Keywords

  • Acute myeloid leukaemia
  • Childhood leukaemia
  • Drug resistance

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