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Kinsey N, Belanger JM, Mandigers PJJ, Leegwater PA, Heinonen T, Hytönen MK, Lohi H, Ostrander EA, Oberbauer AM. Idiopathic Epilepsy Risk Allele Trends in Belgian Tervuren: A Longitudinal Genetic Analysis. Genes (Basel) 2024; 15:114. [PMID: 38255002 PMCID: PMC10815166 DOI: 10.3390/genes15010114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 01/11/2024] [Accepted: 01/17/2024] [Indexed: 01/24/2024] Open
Abstract
Idiopathic epilepsy (IE) has been known to be inherited in the Belgian Tervuren for many decades. Risk genotypes for IE in this breed have recently been identified on Canis familiaris chromosomes (CFA) 14 and 37. In the current study, the allele frequencies of these loci were analyzed to determine whether dog breeders had employed a purposeful selection against IE, leading to a reduction in risk-associated allele frequency within the breed over time. The allele frequencies of two generational groupings of Belgian Tervuren with and without IE were compared. Allele frequencies for risk-associated alleles on CFA14 were unchanged between 1985 and 2015, whereas those on CFA37 increased during that time in the control population (p < 0.05). In contrast, dogs with IE showed a decrease (p < 0.05) in the IE risk-associated allele frequency at the CFA37 locus. Seizure prevalence in the Belgian Tervuren appears to be increasing. These results suggest that, despite awareness that IE is inherited, selection against IE has not been successful.
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Affiliation(s)
- Nathan Kinsey
- Department of Animal Science, University of California, Davis, CA 95616, USA; (N.K.); (J.M.B.)
| | - Janelle M. Belanger
- Department of Animal Science, University of California, Davis, CA 95616, USA; (N.K.); (J.M.B.)
| | - Paul J. J. Mandigers
- Department of Clinical Sciences, Utrecht University, Yalelaan 108, 3584 CM Utrecht, The Netherlands; (P.J.J.M.); (P.A.L.)
| | - Peter A. Leegwater
- Department of Clinical Sciences, Utrecht University, Yalelaan 108, 3584 CM Utrecht, The Netherlands; (P.J.J.M.); (P.A.L.)
| | - Tiina Heinonen
- Department of Medical and Clinical Genetics, University of Helsinki, 00014 Helsinki, Finland; (T.H.); (M.K.H.); (H.L.)
- Department of Veterinary Biosciences, University of Helsinki, 00014 Helsinki, Finland
- Folkhälsan Research Center, 00290 Helsinki, Finland
| | - Marjo K. Hytönen
- Department of Medical and Clinical Genetics, University of Helsinki, 00014 Helsinki, Finland; (T.H.); (M.K.H.); (H.L.)
- Department of Veterinary Biosciences, University of Helsinki, 00014 Helsinki, Finland
- Folkhälsan Research Center, 00290 Helsinki, Finland
| | - Hannes Lohi
- Department of Medical and Clinical Genetics, University of Helsinki, 00014 Helsinki, Finland; (T.H.); (M.K.H.); (H.L.)
- Department of Veterinary Biosciences, University of Helsinki, 00014 Helsinki, Finland
- Folkhälsan Research Center, 00290 Helsinki, Finland
| | - Elaine A. Ostrander
- National Human Genome Research Institute, National Institutes of Health, Bethesda, MD 20892, USA;
| | - Anita M. Oberbauer
- Department of Animal Science, University of California, Davis, CA 95616, USA; (N.K.); (J.M.B.)
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