Influence of genetic background on tumor karyotypes: Evidence for breed-associated cytogenetic aberrations in canine appendicular osteosarcoma

Rachael Thomas, Huixia J. Wang, Pei Chien Tsai, Cordelia F. Langford, Susan P. Fosmire, Cristan M. Jubala, David M. Getzy, Gary R. Cutter, Jaime F. Modiano, Matthew Breen

Research output: Contribution to journalArticle

55 Scopus citations

Abstract

Recurrent chromosomal aberrations in solid tumors can reveal the genetic pathways involved in the evolution of a malignancy and in some cases predict biological behavior. However, the role of individual genetic backgrounds in shaping karyotypes of sporadic tumors is unknown. The genetic structure of purebred dog breeds, coupled with their susceptibility to spontaneous cancers, provides a robust model with which to address this question. We tested the hypothesis that there is an association between breed and the distribution of genomic copy number imbalances in naturally occurring canine tumors through assessment of a cohort of Golden Retrievers and Rottweilers diagnosed with spontaneous appendicular osteosarcoma. Our findings reveal significant correlations between breed and tumor karyotypes that are independent of gender, age at diagnosis, and histological classification. These data indicate for the first time that individual genetic backgrounds, as defined by breed in dogs, influence tumor karyotypes in a cancer with extensive genomic instability.

Original languageEnglish (US)
Pages (from-to)365-377
Number of pages13
JournalChromosome Research
Volume17
Issue number3
DOIs
StatePublished - Apr 2009

Keywords

  • Canine
  • Chromosome
  • Comparative genomic hybridization (CGH)
  • Microarray
  • Osteosarcoma

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