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01.09.2009 | Laboratory Investigation - Human/animal tissue

‘Putting our heads together’: insights into genomic conservation between human and canine intracranial tumors

verfasst von: Rachael Thomas, Shannon E. Duke, Huixia J. Wang, Tessa E. Breen, Robert J. Higgins, Keith E. Linder, Peter Ellis, Cordelia F. Langford, Peter J. Dickinson, Natasha J. Olby, Matthew Breen

Erschienen in: Journal of Neuro-Oncology | Ausgabe 3/2009

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Abstract

Numerous attributes render the domestic dog a highly pertinent model for cancer-associated gene discovery. We performed microarray-based comparative genomic hybridization analysis of 60 spontaneous canine intracranial tumors to examine the degree to which dog and human patients exhibit aberrations of ancestrally related chromosome regions, consistent with a shared pathogenesis. Canine gliomas and meningiomas both demonstrated chromosome copy number aberrations (CNAs) that share evolutionarily conserved synteny with those previously reported in their human counterpart. Interestingly, however, genomic imbalances orthologous to some of the hallmark aberrations of human intracranial tumors, including chromosome 22/NF2 deletions in meningiomas and chromosome 1p/19q deletions in oligodendrogliomas, were not major events in the dog. Furthermore, and perhaps most significantly, we identified highly recurrent CNAs in canine intracranial tumors for which the human orthologue has been reported previously at low frequency but which have not, thus far, been associated intimately with the pathogenesis of the tumor. The presence of orthologous CNAs in canine and human intracranial cancers is strongly suggestive of their biological significance in tumor development and/or progression. Moreover, the limited genetic heterogenity within purebred dog populations, coupled with the contrasting organization of the dog and human karyotypes, offers tremendous opportunities for refining evolutionarily conserved regions of tumor-associated genomic imbalance that may harbor novel candidate genes involved in their pathogenesis. A comparative approach to the study of canine and human intracranial tumors may therefore provide new insights into their genetic etiology, towards development of more sophisticated molecular subclassification and tailored therapies in both species.

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Titel: ‘Putting our heads together’: insights into genomic conservation between human and canine intracranial tumors
verfasst von: Rachael Thomas
Shannon E. Duke
Huixia J. Wang
Tessa E. Breen
Robert J. Higgins
Keith E. Linder
Peter Ellis
Cordelia F. Langford
Peter J. Dickinson
Natasha J. Olby
Matthew Breen
Publikationsdatum: 01.09.2009
Verlag: Springer US
Erschienen in: Journal of Neuro-Oncology / Ausgabe 3/2009
Print ISSN: 0167-594X
Elektronische ISSN: 1573-7373
DOI: https://doi.org/10.1007/s11060-009-9877-5

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