Abstract
Gaucher disease, an autosomal recessive lysosomal storage disorder caused by mutations in the β-glucocerebrosidase gene, was recently discovered in sheep on a “Southdown” sheep stud in Victoria, Australia. Clinical signs include neuropathy, thickened leathery skin, and ichthyosis, with lambs unable to stand from birth. Affected lambs were found to be deficient in glucocerebrosidase activity, and mutational analysis found them to be homozygous for the missense mutations c.1142G>A (p.C381Y) and c.1400C>T (p.P467L). In addition, four silent mutations were detected (c.777C>A [p.Y259Y], c1203A>G [p.Q401Q], c.1335T>C [p.I445I], c.1464C>G [p.L488L]). The human equivalent [C342Y] to the C381Y mutation leads to an acute neuronopathic phenotype in patients. Identification of an acute neuronopathic form of Gaucher disease in sheep provides a large animal model that will enable studies of pathology and evaluation of therapies to treat this common lysosomal storage disorder.
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Abbreviations
- GD:
-
Gaucher disease
- GBA:
-
β-glucocerebrosidase
- NCBI:
-
National Center for Biotechnology Information
- PCR:
-
polymerase chain reaction
- mRNA:
-
messenger RNA
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Acknowledgements
We acknowledge funding support from the National Health and Medical Research Council of Australia for this study. We are grateful to Bev Fong at SA Pathology, Women's and Children's Hospital in Adelaide for the lysosomal enzyme assays, Kathy Nelson at SA Pathology, Women's and Children's Hospital in Adelaide for her assistance in culturing skin fibroblasts, and Dr. Phil Whitfield for the glucocerebroside assay.
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Communicated by: Gregory Pastores
References to electronic databases: Gaucher disease: non-neuronopathic OMIM 230800. Acute neuronopathic OMIM 230900. Subacute neuronopathic OMIM 231000. β-glucocerebrosidase: EC 3.2.1.45. β-glucocerebrosidase HUGO-approved gene symbol: GBA. Human β-glucocerebrosidase gene: OMIM 606463. GenBank/EMBL accession number J03059. Human glucocerebrosidase mRNA: GenBank: M16328. Human β-glucocerebrosidase protein: Swiss-Prot: P04062
Competing interests: None to declare
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Karageorgos, L., Lancaster, M.J., Nimmo, J.S. et al. Gaucher disease in sheep. J Inherit Metab Dis 34, 209–215 (2011). https://doi.org/10.1007/s10545-010-9230-3
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DOI: https://doi.org/10.1007/s10545-010-9230-3