Abstract:
:Hypophosphatasia (HPP) is a rare inherited skeletal dysplasia due to loss of function mutations in the ALPL gene. The disease is subject to an extremely high clinical heterogeneity ranging from a perinatal lethal form to odontohypophosphatasia affecting only teeth. Up to now genetic diagnosis of HPP is performed by sequencing the ALPL gene by Sanger methodology. Osteogenesis imperfecta (OI) and campomelic dysplasia (CD) are the main differential diagnoses of severe HPP, so that in case of negative result for ALPL mutations, OI and CD genes had often to be analyzed, lengthening the time before diagnosis. We report here our 18-month experience in testing 46 patients for HPP and differential diagnosis by targeted NGS and show that this strategy is efficient and useful. We used an array including ALPL gene, genes of differential diagnosis COL1A1 and COL1A2 that represent 90% of OI cases, SOX9, responsible for CD, and 8 potentially modifier genes of HPP. Seventeen patients were found to carry a mutation in one of these genes. Among them, only 10 out of 15 cases referred for HPP carried a mutation in ALPL and 5 carried a mutation in COL1A1 or COL1A2. Interestingly, three of these patients were adults with fractures and/or low BMD. Our results indicate that HPP and OI may be easily misdiagnosed in the prenatal stage but also in adults with mild symptoms for these diseases.
journal_name
Mol Genet Metabjournal_title
Molecular genetics and metabolismauthors
Taillandier A,Domingues C,De Cazanove C,Porquet-Bordes V,Monnot S,Kiffer-Moreira T,Rothenbuhler A,Guggenbuhl P,Cormier C,Baujat G,Debiais F,Capri Y,Cohen-Solal M,Parent P,Chiesa J,Dieux A,Petit F,Roume J,Isnard M,Codoi
10.1016/j.ymgme.2015.09.010subject
Has Abstractpub_date
2015-11-01 00:00:00pages
215-20issue
3eissn
1096-7192issn
1096-7206pii
S1096-7192(15)30056-1journal_volume
116pub_type
杂志文章abstract::Human reproductive function is regulated mainly by luteinizing hormone (LH) and follicle-stimulating hormone (FSH). Mutations of the human LH/ chorionic gonadotropin receptor (LHR) and the FSH receptor (FSHR) leading to either constitutive activation or inactivation of the receptors have been identified. All activatin...
journal_title:Molecular genetics and metabolism
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pub_type: 杂志文章,多中心研究
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更新日期:2012-11-01 00:00:00
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更新日期:2001-11-01 00:00:00
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更新日期:2017-03-01 00:00:00
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pub_type: 杂志文章,meta分析
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journal_title:Molecular genetics and metabolism
pub_type: 共识发展会议,杂志文章,实务指引
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