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Published in: Molecular Cancer 1/2017

Open Access 01-12-2017 | Research

Clonal competition in BcrAbl-driven leukemia: how transplantations can accelerate clonal conversion

Authors: Kerstin Cornils, Lars Thielecke, Doreen Winkelmann, Tim Aranyossy, Mathias Lesche, Andreas Dahl, Ingo Roeder, Boris Fehse, Ingmar Glauche

Published in: Molecular Cancer | Issue 1/2017

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Abstract

Background

Clonal competition in cancer describes the process in which the progeny of a cell clone supersedes or succumbs to other competing clones due to differences in their functional characteristics, mostly based on subsequently acquired mutations. Even though the patterns of those mutations are well explored in many tumors, the dynamical process of clonal selection is underexposed.

Methods

We studied the dynamics of clonal competition in a BcrAbl-induced leukemia using a γ-retroviral vector library encoding the oncogene in conjunction with genetic barcodes. To this end, we studied the growth dynamics of transduced cells on the clonal level both in vitro and in vivo in transplanted mice.

Results

While we detected moderate changes in clonal abundancies in vitro, we observed monoclonal leukemias in 6/30 mice after transplantation, which intriguingly were caused by only two different BcrAbl clones. To analyze the success of these clones, we applied a mathematical model of hematopoietic tissue maintenance, which indicated that a differential engraftment capacity of these two dominant clones provides a possible explanation of our observations. These findings were further supported by additional transplantation experiments and increased BcrAbl transcript levels in both clones.

Conclusion

Our findings show that clonal competition is not an absolute process based on mutations, but highly dependent on selection mechanisms in a given environmental context.
Appendix
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Metadata
Title
Clonal competition in BcrAbl-driven leukemia: how transplantations can accelerate clonal conversion
Authors
Kerstin Cornils
Lars Thielecke
Doreen Winkelmann
Tim Aranyossy
Mathias Lesche
Andreas Dahl
Ingo Roeder
Boris Fehse
Ingmar Glauche
Publication date
01-12-2017
Publisher
BioMed Central
Published in
Molecular Cancer / Issue 1/2017
Electronic ISSN: 1476-4598
DOI
https://doi.org/10.1186/s12943-017-0668-x

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