Explaining the in vitro and in vivo differences in leukemia therapy

Tom Lenaerts, Fausto Castagnetti, Arne Traulsen, Jorge M. Pacheco, Gianantonio Rosti, David Dingli

Research output: Contribution to journalReview articlepeer-review

7 Scopus citations


The majority of patients with chronic myeloid leukemia in early chronic phase (CML-ECP) who are treated with imatinib achieve a complete cytogenetic response with a significant reduction in the risk of progression to advanced phases. Recent studies show that therapy of CML-ECP with nilotinib leads to a faster and deeper response compared to imatinib. However, in vitro data indicates that there is no detectable difference in inhibition of signaling downstream of Bcr-Abl between the two agents and that neither drug induces apoptosis of CML CD34+ cells. We use a computational model of hematopoiesis and CML, combined with serial quantitative data of disease burden under imatinib and nilotinib therapy to explain this apparent disconnect between in vivo and in vitro responses. We show how a subtle difference in the differentiation rate of CML cells under therapy with either agent, with marginal impact onto the in vitro studies, translates into a significantly different reproductive fitness of treated cells in vivo, providing a sizeable difference, hence providing an explanation for the superior response observed with nilotinib.

Original languageEnglish (US)
Pages (from-to)1540-1544
Number of pages5
JournalCell Cycle
Issue number10
StatePublished - May 15 2011


  • Evolution
  • Hematopoiesis
  • Reproductive fitness
  • Selection
  • Self-renewal

ASJC Scopus subject areas

  • Molecular Biology
  • Developmental Biology
  • Cell Biology


Dive into the research topics of 'Explaining the in vitro and in vivo differences in leukemia therapy'. Together they form a unique fingerprint.

Cite this