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Identification of genetic variation in 11 candidate genes of canine mammary tumour
Author(s) -
Borge K. S.,
BørresenDale A. L.,
Lingaas F.
Publication year - 2011
Publication title -
veterinary and comparative oncology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.864
H-Index - 34
eISSN - 1476-5829
pISSN - 1476-5810
DOI - 10.1111/j.1476-5829.2010.00250.x
Subject(s) - biology , genetics , single nucleotide polymorphism , gene , genetic variation , allele , chek2 , germline , inbreeding , germline mutation , genotype , mutation , population , medicine , environmental health
The incidence of canine mammary tumours (CMTs) differs significantly between breeds, strongly supporting an influence of genetic risk factors. We aimed at identifying germline genetic variations in mammary tumour‐associated genes in dogs and survey whether these might alter the encoded proteins. We sequenced 11 genes ( BRCA1 , BRCA2 , BRIP1 , CDH1 , CHEK2 , EGFR , ESR1 , HER2 , PTEN , STK11 and TP53 ) and screened for genetic variations. Sixty‐four single nucleotide polymorphisms (SNPs) were identified. Nine of the coding SNPs were non‐synonymous, of which four were located in gene regions conserved across four species. Three of the non‐synonymous SNPs might be damaging according to PolyPhen predictions. One of the indels identified has previously been associated with CMTs. Because of the founder effects, genetic drift and inbreeding in many dog breeds the allele frequencies of the genes studied are likely to vary significantly between breeds and contribute to the considerable difference in genetic risk associated with cancer.