Abstract
Objective
Amelogenesis imperfecta (AI) is a rare hereditary disorder affecting the quality and quantity of the tooth enamel. The purpose of this study was to identify the genetic etiology of hypoplastic AI families based on the candidate gene approach.
Materials and methods
We recruited three Turkish families with hypoplastic AI and performed a candidate gene screening based on the characteristic clinical feature to find the pathogenic genetic etiology.
Results
The candidate gene sequencing of the LAMB3 gene for family 1 revealed a heterozygous nonsense mutation in the last exon [c.3431C > A, p.(Ser1144*)]. FAM20A gene sequencing for families 2 and 3 identified a homozygous deletion [c.34_35delCT, p.(Leu12Alafs*67)] and a homozygous deletion-insertion (c.1109 + 3_1109 + 7delinsTGGTC) mutation, respectively.
Conclusion
The candidate gene approach can be successfully used to identify the genetic etiology of the AI in some cases with characteristic clinical features.
Clinical relevance
Identification of the genetic etiology of the AI will help both the family members and dentist understand the nature of the disorder. Characteristic clinical feature can suggest possible genetic causes.
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Acknowledgements
We thank the participants in this study for their cooperation.
Funding
This work was supported by grants by the National Research Foundation of Korea (NRF) grant funded by the Korea government (NRF-2017R1A2A2A05069281) and NIDCR/NIH grant DE015846.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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Informed consent was obtained from all individual participants included in the study. The study protocol was reviewed and approved by the Institutional Review Board at Seoul National University Dental Hospital (CRI05003G) and at the University of Istanbul (IRB00009905).
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Kim, Y.J., Seymen, F., Kang, J. et al. Candidate gene sequencing reveals mutations causing hypoplastic amelogenesis imperfecta. Clin Oral Invest 23, 1481–1487 (2019). https://doi.org/10.1007/s00784-018-2577-9
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DOI: https://doi.org/10.1007/s00784-018-2577-9