RPGR is mutated in patients with a complex X linked phenotype combining primary ciliary dyskinesia and retinitis pigmentosa
| Autor: | Maciej Geremek, B. Pelosse, Annick Clement, Estelle Escudier, Aline Tamalet, Michał Witt, Gilles Roger, Bénédicte Duriez, Anne-Marie Bridoux, Sandrine Marlin, Serge Amselem, Anne Moore, Bertrand Delaisi, André Coste |
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| Rok vydání: | 2005 |
| Předmět: |
Adult
Male Adolescent Genotype DNA Mutational Analysis Dynein Respiratory Mucosa Biology Autosomal recessive trait Retinitis pigmentosa otorhinolaryngologic diseases Genetics medicine Humans Cilia Eye Proteins Genetics (clinical) X chromosome Primary ciliary dyskinesia Kartagener Syndrome Cilium Genetic Diseases X-Linked Retinitis pigmentosa GTPase regulator medicine.disease Phenotype Pedigree Mutation Original Article Female Retinitis Pigmentosa Microsatellite Repeats |
| Zdroj: | Journal of Medical Genetics. 43:326-333 |
| ISSN: | 1468-6244 |
| DOI: | 10.1136/jmg.2005.034868 |
| Popis: | Introduction: Primary ciliary dyskinesia (PCD) is a rare disease classically transmitted as an autosomal recessive trait and characterised by recurrent airway infections due to abnormal ciliary structure and function. To date, only two autosomal genes, DNAI1 and DNAH5 encoding axonemal dynein chains, have been shown to cause PCD with defective outer dynein arms. Here, we investigated one non-consanguineous family in which a woman with retinitis pigmentosa (RP) gave birth to two boys with a complex phenotype combining PCD, discovered in early childhood and characterised by partial dynein arm defects, and RP that occurred secondarily. The family history prompted us to search for an X linked gene that could account for both conditions. Results: We found perfect segregation of the disease phenotype with RP3 associated markers (Xp21.1). Analysis of the retinitis pigmentosa GTPase regulator gene ( RPGR ) located at this locus revealed a mutation (631_IVS6+9del) in the two boys and their mother. As shown by study of RPGR transcripts expressed in nasal epithelial cells, this intragenic deletion, which leads to activation of a cryptic donor splice site, predicts a severely truncated protein. Conclusion: These data provide the first clear demonstration of X linked transmission of PCD. This unusual mode of inheritance of PCD in patients with particular phenotypic features (that is, partial dynein arm defects and association with RP), which should modify the current management of families affected by PCD or RP, unveils the importance of RPGR in the proper development of both respiratory ciliary structures and connecting cilia of photoreceptors. |
| Databáze: | OpenAIRE |
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