Genetic Heterogeneity and Clonal Evolution in Neuroblastoma
Author Information
Author(s): Mora J, Cheung N-K V, Gerald W L
Primary Institution: Memorial Sloan-Kettering Cancer Center
Hypothesis
Tumour heterogeneity and clonal evolution at the genetic level may explain the development of malignant or resistant disease during clinical progression of neuroblastoma.
Conclusion
Neuroblastoma exhibits a high degree of clonal heterogeneity and clonal evolution occurs during therapy and clinical progression.
Supporting Evidence
- 66% of group 1 samples were heterogeneous, with distinct allelic patterns.
- 60% of group 2 showed different allelic patterns in post-chemotherapy specimens.
- Pre-chemotherapy samples contained 2 distinct ploidy clones, one diploid and one triploid.
- All post-chemotherapy tumor samples were 100% diploid.
Takeaway
Neuroblastoma tumors can be very different from each other, and they can change during treatment, which might make them harder to treat.
Methodology
The study used 1p allelic analysis and DNA ploidy to evaluate clonal heterogeneity and clonal selection in vivo.
Participant Demographics
The study involved 29 patients with neuroblastoma.
Digital Object Identifier (DOI)
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