Abstract:
:Circulating tumor DNA (ctDNA) has become an attractive biomarker in human oncology, and its use may be informative in canine cancer. Thus, we used droplet digital PCR or PCR for antigen receptor rearrangement, to explore tumor-specific point mutations, copy number alterations, and chromosomal rearrangements in the plasma of cancer-affected dogs. We detected ctDNA in 21/23 (91.3%) of histiocytic sarcoma (HS), 2/8 (25%) of oral melanoma, and 12/13 (92.3%) of lymphoma cases. The utility of ctDNA in diagnosing HS was explored in 133 dogs, including 49 with HS, and the screening of recurrent PTPN11 mutations in plasma had a specificity of 98.8% and a sensitivity between 42.8 and 77% according to the clinical presentation of HS. Sensitivity was greater in visceral forms and especially related to pulmonary location. Follow-up of four dogs by targeting lymphoma-specific antigen receptor rearrangement in plasma showed that minimal residual disease detection was concordant with clinical evaluation and treatment response. Thus, our study shows that ctDNA is detectable in the plasma of cancer-affected dogs and is a promising biomarker for diagnosis and clinical follow-up. ctDNA detection appears to be useful in comparative oncology research due to growing interest in the study of natural canine tumors and exploration of new therapies.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Prouteau A,Denis JA,De Fornel P,Cadieu E,Derrien T,Kergal C,Botherel N,Ulvé R,Rault M,Bouzidi A,François R,Dorso L,Lespagnol A,Devauchelle P,Abadie J,André C,Hédan Bdoi
10.1038/s41598-020-80332-ysubject
Has Abstractpub_date
2021-01-13 00:00:00pages
877issue
1issn
2045-2322pii
10.1038/s41598-020-80332-yjournal_volume
11pub_type
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