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Sökning: WFRF:(Grigelioniene G) > (2015-2019)

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  • Hammarsjo, A, et al. (författare)
  • Novel KIAA0753 mutations extend the phenotype of skeletal ciliopathies
  • 2017
  • Ingår i: Scientific reports. - : Springer Science and Business Media LLC. - 2045-2322. ; 7:1, s. 15585-
  • Tidskriftsartikel (refereegranskat)abstract
    • The skeletal ciliopathies are a heterogeneous group of disorders with a significant clinical and genetic variability and the main clinical features are thoracic hypoplasia and short tubular bones. To date, 25 genes have been identified in association with skeletal ciliopathies. Mutations in the KIAA0753 gene have recently been associated with Joubert syndrome (JBTS) and orofaciodigital (OFD) syndrome. We report biallelic pathogenic variants in KIAA0753 in four patients with short-rib type skeletal dysplasia. The manifestations in our patients are variable and ranging from fetal lethal to viable and moderate skeletal dysplasia with narrow thorax and abnormal metaphyses. We demonstrate that KIAA0753 is expressed in normal fetal human growth plate and show that the affected fetus, with a compound heterozygous frameshift and a nonsense mutation in KIAA0753, has an abnormal proliferative zone and a broad hypertrophic zone. The importance of KIAA0753 for normal skeletal development is further confirmed by our findings that zebrafish embryos homozygous for a nonsense mutation in kiaa0753 display altered cartilage patterning.
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  • Malmgren, B., et al. (författare)
  • Tooth agenesis in osteogenesis imperfecta related to mutations in the collagen type I genes
  • 2017
  • Ingår i: Oral Diseases. - : Wiley. - 1354-523X .- 1601-0825. ; 23:1, s. 42-49
  • Tidskriftsartikel (refereegranskat)abstract
    • BackgroundOsteogenesis imperfecta (OI) is a heterogeneous group of disorders of connective tissue, mainly caused by mutations in the collagen type I genes (COL1A1 and COL1A2). Tooth agenesis is a common feature of OI. We investigated the association between tooth agenesis and collagen type I mutations in individuals with OI. Subjects and methodsIn this cohort study, 128 unrelated individuals with OI were included. Panoramic radiographs were analyzed regarding dentinogenesis imperfecta (DGI) and congenitally missing teeth. The collagen I genes were sequenced in all individuals, and in 25, multiplex ligation-dependent probe amplification was performed. ResultsMutations in the COL1A1 and COL1A2 genes were found in 104 of 128 individuals. Tooth agenesis was diagnosed in 17% (hypodontia 11%, oligodontia 6%) and was more frequent in those with DGI (P=0.016), and in those with OI type III, 47%, compared to those with OI types I, 12% (P=0.003), and IV, 13% (P=0.017). Seventy-five percent of the individuals with oligodontia (6 missing teeth) had qualitative mutations, but there was no association with OI type, gender, or presence of DGI. ConclusionThe prevalence of tooth agenesis is high (17%) in individuals with OI, and OI caused by a qualitative collagen I mutation is associated with oligodontia.
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