The Modified Shields Classification and 12 Families with Defined DSPP Mutations
Tarih
2022Yazar
Lee, Kevin Y.
KORUYUCU, Mine
Wu, Suwei
Chan, Hui-Chen
Hu, Jan C-C
Simmer, James P.
Zhang, Hong
Moon, Sophie J. H.
Donnelly, Lori A-J
Lee, Yuan-Ling
Seymen, Figen
Shields, Edward D.
Wang, Shih-Kai
Morrow, Melissa
Slayton, Rebecca L.
Tsai, Anthony T. P.
Hsiang, Chia-Lan
Üst veri
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Mutations in Dentin Sialophosphoprotein (DSPP) are known to cause, in order of increasing severity, dentin dysplasia type-II (DD-II), dentinogenesis imperfecta type-II (DGI-II), and dentinogenesis imperfecta type-III (DGI-III). DSPP mutations fall into two groups: a 5 '-group that affects protein targeting and a 3 '-group that shifts translation into the -1 reading frame. Using whole-exome sequence (WES) analyses and Single Molecule Real-Time (SMRT) sequencing, we identified disease-causing DSPP mutations in 12 families. Three of the mutations are novel: c.53T>C/p.(Val18Ala); c.3461delG/p.(Ser1154Metfs*160); and c.3700delA/p.(Ser1234Alafs*80). We propose genetic analysis start with WES analysis of proband DNA to identify mutations in COL1A1 and COL1A2 causing dominant forms of osteogenesis imperfecta, 5 '-DSPP mutations, and 3 '-DSPP frameshifts near the margins of the DSPP repeat region, and SMRT sequencing when the disease-causing mutation is not identified. After reviewing the literature and incorporating new information showing distinct differences in the cell pathology observed between knockin mice with 5 '-Dspp or 3 '-Dspp mutations, we propose a modified Shields Classification based upon the causative mutation rather than phenotypic severity such that patients identified with 5 '-DSPP defects be diagnosed as DGI-III, while those with 3 '-DSPP defects be diagnosed as DGI-II.
Bağlantı
http://hdl.handle.net/20.500.12627/182810https://doi.org/10.3390/genes13050858
https://avesis.istanbul.edu.tr/api/publication/558fcd41-618a-4fcc-a979-da845de52373/file
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