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Article

MIA3 Splice Defect in Cane Corso Dogs with Dental-Skeletal-Retinal Anomaly (DSRA)

1
Institute of Genetics, Vetsuisse Faculty, University of Bern, 3001 Bern, Switzerland
2
Department of Clinical Sciences of Companion Animals, General Surgery, Faculty of Veterinary Medicine, Utrecht University, 3584 CM Utrecht, The Netherlands
3
Kengaraga Veterinary Clinic, LV-1035 Riga, Latvia
4
Laboklin GmbH & Co. KG, Steubenstraße 4, 97688 Bad Kissingen, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Benjamin N. Sacks
Received: 3 September 2021 / Revised: 24 September 2021 / Accepted: 24 September 2021 / Published: 25 September 2021
(This article belongs to the Special Issue Canine Genetics 2)
We investigated a hereditary syndrome in Cane Corso dogs. Affected dogs developed dental-skeletal-retinal anomaly (DSRA), clinically characterized by brittle, discolored, translucent teeth, disproportionate growth and progressive retinal degeneration resulting in vision loss. Combined linkage and homozygosity mapping delineated a 5.8 Mb critical interval. The comparison of whole genome sequence data of an affected dog to 789 control genomes revealed a private homozygous splice region variant in the critical interval. It affected the MIA3 gene encoding the MIA SH3 domain ER export factor 3, which has an essential role in the export of collagen and other secreted proteins. The identified variant, XM_005640835.3:c.3822+3_3822+4del, leads to skipping of two exons from the wild type transcript, XM_005640835.3:r.3712_3822del. Genotypes at the variant were consistent with monogenic autosomal recessive mode of inheritance in a complete family and showed perfect genotype-phenotype association in 18 affected and 22 unaffected Cane Corso dogs. MIA3 variants had previously been shown to cause related phenotypes in humans and mice. Our data in dogs together with the existing functional knowledge of MIA3 variants in other mammalian species suggest the MIA3 splice defect and a near complete loss of gene function as causative molecular pathomechanism for the DSRA phenotype in the investigated dogs. View Full-Text
Keywords: Canis lupus familiaris; animal model; endoplasmic reticulum; TANGO1; collagen; precision medicine; non-coding; splicing Canis lupus familiaris; animal model; endoplasmic reticulum; TANGO1; collagen; precision medicine; non-coding; splicing
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MDPI and ACS Style

Christen, M.; Booij-Vrieling, H.; Oksa-Minalto, J.; de Vries, C.; Kehl, A.; Jagannathan, V.; Leeb, T. MIA3 Splice Defect in Cane Corso Dogs with Dental-Skeletal-Retinal Anomaly (DSRA). Genes 2021, 12, 1497. https://0-doi-org.brum.beds.ac.uk/10.3390/genes12101497

AMA Style

Christen M, Booij-Vrieling H, Oksa-Minalto J, de Vries C, Kehl A, Jagannathan V, Leeb T. MIA3 Splice Defect in Cane Corso Dogs with Dental-Skeletal-Retinal Anomaly (DSRA). Genes. 2021; 12(10):1497. https://0-doi-org.brum.beds.ac.uk/10.3390/genes12101497

Chicago/Turabian Style

Christen, Matthias, Henriëtte Booij-Vrieling, Jelena Oksa-Minalto, Cynthia de Vries, Alexandra Kehl, Vidhya Jagannathan, and Tosso Leeb. 2021. "MIA3 Splice Defect in Cane Corso Dogs with Dental-Skeletal-Retinal Anomaly (DSRA)" Genes 12, no. 10: 1497. https://0-doi-org.brum.beds.ac.uk/10.3390/genes12101497

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