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Translated Mutant DSPP mRNA Expression Level Impacts the Severity of Dentin Defects

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Issue Date
2022-06
Publisher
MDPI AG
Citation
Journal of Personalized Medicine, Vol.12 No.6, p. 1002
Abstract
Hereditary dentin defects are conventionally classified into three types of dentinogenesis imperfecta (DGI) and two types of dentin dysplasia (DD). Mutations in the dentin sialophosphoprotein (DSPP) gene have been identified to cause DGI type II and III and DD type II; therefore, these are not three different conditions, but rather allelic disorders. In this study, we recruited three families with varying clinical phenotypes from DGI-III to DD-II and performed mutational analysis by candidate gene analysis or whole-exome sequencing. Three novel mutations including a silent mutation (NM 014208.3: c.52-2del, c.135+1G>C, and c.135G>A; p.(G1n45=)) were identified, all of which affected pre-mRNA splicing. Comparison of the splicing assay results revealed that the expression level of the DSPP exon 3 deletion transcript correlated with the severity of the dentin defects. This study did not only expand the mutational spectrum of DSPP gene, but also advanced our understanding of the molecular pathogenesis impacting the severity of hereditary dentin defects.
ISSN
2075-4426
URI
https://hdl.handle.net/10371/184512
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College of Dentistry/School of Dentistry (치과대학/치의학대학원)Dept. of Dental Science(치의과학과)Journal Papers (저널논문_치의과학과)
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