PRNP promoter polymorphisms are associated with BSE susceptibility in Swiss and German cattle

Haase, Bianca; Doherr, Marcus G; Seuberlich, Torsten; Drogemuller, Cord; Dolf, Gaudenz; Nicken, Petra; Schiebel, Katrin; Ziegler, Ute; Groschup, Martin H; Zurbriggen, Andreas; Leeb, Tosso
January 2007
BMC Genetics;2007, Vol. 8, p1
Academic Journal
Background: Non-synonymous polymorphisms within the prion protein gene (PRNP) influence the susceptibility and incubation time for transmissible spongiform encephalopathies (TSE) in some species such as sheep and humans. In cattle, none of the known polymorphisms within the PRNP coding region has a major influence on susceptibility to bovine spongiform encephalopathy (BSE). Recently, however, we demonstrated an association between susceptibility to BSE and a 23 insertion/deletion (indel) polymorphism and a 12 bp indel polymorphism within the putative PRNP promoter region using 43 German BSE cases and 48 German control cattle. The objective of study was to extend this work by including a larger number of BSE cases and control cattle German and Swiss origin. Results: Allele, genotype and haplotype frequencies of the two indel polymorphisms were determined in 449 BSE cattle and 431 unaffected cattle from Switzerland and Germany including 43 German BSE and 16 German control animals from the original study. When breeds with similar allele and genotype distributions were compared, the 23 bp indel polymorphism again showed significant association with susceptibility to BSE. However, some additional breed-specific allele genotype distributions were identified, mainly related to the Brown breeds. Conclusion: Our study corroborated earlier findings that polymorphisms in the PRNP promoter region have an influence on susceptibility to BSE. However, breed-specific differences exist need to be accounted for when analyzing such data.


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