Short-rib polydactyly and jeune syndromes are caused by mutations in WDR60
McInerney-Leo, Aideen M., Schmidts, Miriam, Cortés, Claudio R., Leo, Paul J., Gener, Blanca, Courtney, Andrew D., Gardiner, Brooke, Harris, Jessica A., Lu, Yeping, Marshall, Mhairi, Scambler, Peter J., Beales, Philip L., Brown, Matthew A., Zankl, Andreas, Mitchison, Hannah M., Duncan, Emma L., & Wicking, Carol (2013) Short-rib polydactyly and jeune syndromes are caused by mutations in WDR60. American Journal of Human Genetics, 93(3), pp. 515-523.
Short-rib polydactyly syndromes (SRPS I-V) are a group of lethal congenital disorders characterized by shortening of the ribs and long bones, polydactyly, and a range of extraskeletal phenotypes. A number of other disorders in this grouping, including Jeune and Ellis-van Creveld syndromes, have an overlapping but generally milder phenotype. Collectively, these short-rib dysplasias (with or without polydactyly) share a common underlying defect in primary cilium function and form a subset of the ciliopathy disease spectrum. By using whole-exome capture and massive parallel sequencing of DNA from an affected Australian individual with SRPS type III, we detected two novel heterozygous mutations in WDR60, a relatively uncharacterized gene. These mutations segregated appropriately in the unaffected parents and another affected family member, confirming compound heterozygosity, and both were predicted to have a damaging effect on the protein. Analysis of an additional 54 skeletal ciliopathy exomes identified compound heterozygous mutations in WDR60 in a Spanish individual with Jeune syndrome of relatively mild presentation. Of note, these two families share one novel WDR60 missense mutation, although haplotype analysis suggested no shared ancestry. We further show that WDR60 localizes at the base of the primary cilium in wild-type human chondrocytes, and analysis of fibroblasts from affected individuals revealed a defect in ciliogenesis and aberrant accumulation of the GLI2 transcription factor at the centrosome or basal body in the absence of an obvious axoneme. These findings show that WDR60 mutations can cause skeletal ciliopathies and suggest a role for WDR60 in ciliogenesis.
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|Item Type:||Journal Article|
|Keywords:||complementary DNA, transcription factor Gli2, article, axoneme, cartilage cell, centrosome, chondrodysplasia, clinical feature, congenital disorder, controlled study, DNA sequence, eukaryotic flagellum, exome, fibroblast, gene, gene mutation, haplotype, heterozygosity, human, human cell, jeune syndrome, kinetosome, missense mutation, mouse, nonhuman, phenotype, priority journal, wdr60 gene, Adaptor Proteins, Signal Transducing, Amino Acid Sequence, Animals, Base Sequence, Child, Preschool, Chondrocytes, Chromosome Segregation, Cilia, Ellis-Van Creveld Syndrome, Fatal Outcome, Female, Fetus, Fibroblasts, Humans, Infant, Infant, Newborn, Male, Mice, Molecular Sequence Data, Mutant Proteins, Mutation, Pedigree, Pregnancy, Short Rib-Polydactyly Syndrome|
|Divisions:||Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
|Deposited On:||24 Sep 2015 02:32|
|Last Modified:||28 Mar 2016 23:30|
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