Clonal dynamics in osteosarcoma defined by RGB marking

Stefano Gambera, Ander Abarrategi, Fernando González-Camacho, Álvaro Morales-Molina, Josep Roma, Arantzazu Alfranca and Javier García-Castro ()
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Stefano Gambera: Instituto de Salud Carlos III (ISCIII)
Ander Abarrategi: Instituto de Salud Carlos III (ISCIII)
Fernando González-Camacho: Instituto de Salud Carlos III (ISCIII)
Álvaro Morales-Molina: Instituto de Salud Carlos III (ISCIII)
Josep Roma: Vall d’Hebron Hospital
Arantzazu Alfranca: Instituto de Salud Carlos III (ISCIII)
Javier García-Castro: Instituto de Salud Carlos III (ISCIII)

Nature Communications, 2018, vol. 9, issue 1, 1-13

Abstract: Abstract Osteosarcoma is a type of bone tumour characterized by considerable levels of phenotypic heterogeneity, aneuploidy, and a high mutational rate. The life expectancy of osteosarcoma patients has not changed during the last three decades and thus much remains to be learned about the disease biology. Here, we employ a RGB-based single-cell tracking system to study the clonal dynamics occurring in a de novo-induced murine osteosarcoma model. We show that osteosarcoma cells present initial polyclonal dynamics, followed by clonal dominance associated with adaptation to the microenvironment. Interestingly, the dominant clones are composed of subclones with a similar tumour generation potential when they are re-implanted in mice. Moreover, individual spontaneous metastases are clonal or oligoclonal, but they have a different cellular origin than the dominant clones present in primary tumours. In summary, we present evidence that osteosarcomagenesis can follow a neutral evolution model, in which different cancer clones coexist and propagate simultaneously.

Date: 2018
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DOI: 10.1038/s41467-018-06401-z

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