Shared hotspot mutations in spontaneously arising cancers position dog as an unparalleled comparative model for precision therapeutics
Rodrigues, L. C.; Watson, J.; Feng, Y.; Lewis, B.; Harvey, G.; Post, G.; MEGQUIER, K. J.; Lambert, L.; Miller, A.; Lopes, C.; Zhao, S.
Show abstract
Naturally occurring canine cancers have remarkable similarities to their human counterparts. In order to determine whether these similarities occur at the molecular level, we investigated hotspot mutations in a variety of spontaneously arising canine cancers and found high concordance in oncogenic drivers between cancers in both species. These findings suggest that canines may present a powerful and complementary model for preclinical investigations for targeted cancer therapeutics. Through analysis of 708 client-owned dogs from 96 breeds (plus mixed breeds) with 23 common tumor types, we discovered mutations in 50 well-established oncogenes and tumor suppressors, and compared them to those reported in human cancers. TP53 is the most commonly mutated gene, detected in 30.81% of canine tumors overall and >40% in hemangiosarcoma and osteosarcoma. Canine tumors share mutational hotspots with human tumors in oncogenes including PIK3CA, KRAS, NRAS, BRAF, KIT and EGFR. Hotspot mutations with significant (P<0.0001) association to tumor type include NRAS G61R and PIK3CA H1047R in hemangiosarcoma, ERBB2 V659E in pulmonary carcinoma, and BRAF V588E in urothelial carcinoma. This work positions canines as excellent spontaneous models of human cancers that can help to investigate a wide spectrum of targeted therapies.
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