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Title

Primary ciliary dyskinesia associated with normal axoneme ultrastructure is caused by DNAH11 mutations

Authors
Schwabe, Georg C.
Hoffmann, Katrin
Loges, Niki Tomas
Birker, Daniel
de Santi, Margherita M.
Olbrich, Heike
Fliegauf, Manfred
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Published in Human Mutation. 2008, vol. 29, no. 2, p. 289-98
Abstract Primary ciliary dyskinesia (PCD) is an inherited disorder characterized by perturbed or absent beating of motile cilia, which is referred to as Kartagener syndrome (KS) when associated with situs inversus. We present a German family in which five individuals have PCD and one has KS. PCD was confirmed by analysis of native and cultured respiratory ciliated epithelia with high-speed video microscopy. Respiratory ciliated cells from the affected individuals showed an abnormal nonflexible beating pattern with a reduced cilium bending capacity and a hyperkinetic beat. Interestingly, the axonemal ultrastructure of these respiratory cilia was normal and outer dynein arms were intact, as shown by electron microscopy and immunohistochemistry. Microsatellite analysis indicated genetic linkage to the dynein heavy chain DNAH11 on chromosome 7p21. All affected individuals carried the compound heterozygous DNAH11 mutations c.12384C>G and c.13552_13608del. Both mutations are located in the C-terminal domain and predict a truncated DNAH11 protein (p.Y4128X, p.A4518_A4523delinsQ). The mutations described here were not present in a cohort of 96 PCD patients. In conclusion, our findings support the view that DNAH11 mutations indeed cause PCD and KS, and that the reported DNAH11 nonsense mutations are associated with a normal axonemal ultrastructure and are compatible with normal male fertility.
Keywords AdolescentAdultAllelesAmino Acid SequenceAxoneme/ultrastructureCilia/ultrastructureDynein ATPase/chemistry/genetics/metabolismEpithelial Cells/metabolism/pathologyFemaleHumansImmunohistochemistryInfantKartagener Syndrome/geneticsMaleMiddle AgedMolecular Sequence DataMutant Proteins/chemistryMutation/geneticsPedigreePhenotypePolymorphism, Single Nucleotide/genetics
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PMID: 18022865
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Research group Pathologie Moléculaire de la Trisomie 21 et le Génome Humain (248)
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SCHWABE, Georg C. et al. Primary ciliary dyskinesia associated with normal axoneme ultrastructure is caused by DNAH11 mutations. In: Human Mutation, 2008, vol. 29, n° 2, p. 289-98. https://archive-ouverte.unige.ch/unige:1798

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Deposited on : 2009-05-28

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