Targeted next-generation sequencing (NGS) analysis of mutations in nonsyndromic tooth agenesis candidate genes Analysis of a Turkish cohort

• Published in: Journal of orofacial orthopedics Vol. 83; no. Suppl 1; pp. 65 - 74
• Main Authors: Keskin, Gül, Karaer, Kadri, Uçar Gündoğar, Zübeyde
• Format: Journal Article
• Language: English
• Published: Heidelberg Springer Medizin 01.10.2022
• Subjects: Anodontia - diagnosis; Anodontia - epidemiology; Anodontia - genetics; Calcium-Binding Proteins - genetics; Cysteine - genetics; Dentistry; High-Throughput Nucleotide Sequencing; Humans; Keratin-17 - genetics; Medicine; Mutation - genetics; Oral and Maxillofacial Surgery; Original Article; Receptors, Lipoprotein - genetics; Turkey; Turkey; Oligodontie; Hypodontie; Hypodontia; Amino acid sequence; Aminosäuresequenz; MSX1; AXIN2; Oligodontia
• ISSN: 1434-5293; 1615-6714; 1615-6714
• DOI: 10.1007/s00056-021-00284-4

Purpose The goal of this study was to assess genes known to be associated with tooth agenesis with next-generation sequencing (NGS) and analyze the relationship between these mutations and tooth agenesis phenotypes. Methods The study included 49 individuals aged between 6 and 13 years. A total of 14 genes related to nonsyndromic tooth agenesis were selected for targeted NGS. Mutations in Msh homeobox 1 ( MSX1 ), Wnt family member 10A ( WNT10A ), axis inhibition protein 2 ( AXIN2 ), keratin 17 ( KRT17 ), lipoprotein receptor 6 ( LRP6 ), and secreted protein, acidic and rich in cysteine (SPARC)-related modular calcium-binding protein 2 ( SMOC2 ) genes were investigated. Results Mutations in six genes were detected in 12 of 49 subjects. Fifteen variants were identified, including the unknown variants c.657G > C in MSX1 , c.2029C > T in AXIN2 , and c.1603A > T in LRP6 . Second premolar tooth agenesis was observed in 43.3% of all tooth agenesis cases with mutations, and it was the predominant phenotype observed for each mutated gene, followed by tooth agenesis of the lateral incisors (20%). Conclusions Variations in MSX1, WNT10A, AXIN2, KRT17, LRP6 , and SMOC2 may be a risk factor for hypodontia or oligodontia in the Turkish population.