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Ouyang T, Chen D, Ma Z, Li X, Cao G, Lin L, Zeng M, Chen T. Treatment strategy for patient with non-syndromic tooth agenesis: a case report and literature review. BMC Oral Health 2024; 24:840. [PMID: 39048976 PMCID: PMC11270777 DOI: 10.1186/s12903-024-04613-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2023] [Accepted: 07/16/2024] [Indexed: 07/27/2024] Open
Abstract
BACKGROUND Non-syndromic tooth agenesis (NSTA) is a type of ectodermal dysplasia (ED) in which patients with non-syndromic oligodontia may only affect teeth. No pathological findings were found in other tissues of the ectodermal. Herein, we report a case of a NSTA patient with severe dental anxiety and poor oral health. CASE PRESENTATION A 5-year-old boy without systemic diseases presented as a patient with oligodontia, extensive caries, and periapical periodontitis. Molecular genetic analysis found a mutation in the Ectodysplasin A (EDA) gene, confirming the diagnosis of NSTA. CONCLUSION Tooth agenesis (TA) is the most common ectodermal developmental abnormality in humans. Non-syndromic oligodontia patients often seek treatment in the department of stomatology. Because of their complex oral conditions, these patients should be provided with a systematic and personalized treatment plan.
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Affiliation(s)
- Tianfeng Ouyang
- Department of Stomatology, Nanfang Hospital, Southern Medical University, 1838 N Guangzhou RD, Guangzhou, 510080, Guangdong, People's Republic of China
| | - Dong Chen
- Department of Stomatology, Nanfang Hospital, Southern Medical University, 1838 N Guangzhou RD, Guangzhou, 510080, Guangdong, People's Republic of China
| | - Zeli Ma
- Department of Stomatology, Nanfang Hospital, Southern Medical University, 1838 N Guangzhou RD, Guangzhou, 510080, Guangdong, People's Republic of China
| | - Xin Li
- Department of Stomatology, Nanfang Hospital, Southern Medical University, 1838 N Guangzhou RD, Guangzhou, 510080, Guangdong, People's Republic of China
| | - Ge Cao
- Department of Stomatology, Nanfang Hospital, Southern Medical University, 1838 N Guangzhou RD, Guangzhou, 510080, Guangdong, People's Republic of China
| | - Lin Lin
- Department of Stomatology, Nanfang Hospital, Southern Medical University, 1838 N Guangzhou RD, Guangzhou, 510080, Guangdong, People's Republic of China
| | - Ming Zeng
- Department of Stomatology, Nanfang Hospital, Southern Medical University, 1838 N Guangzhou RD, Guangzhou, 510080, Guangdong, People's Republic of China
| | - Ting Chen
- Department of Stomatology, Nanfang Hospital, Southern Medical University, 1838 N Guangzhou RD, Guangzhou, 510080, Guangdong, People's Republic of China.
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Yang Y, Qin M, Zhao Y, Wang X. Digenic inheritance accounts for phenotypic variability in amelogenesis imperfecta. Clin Genet 2024; 105:243-253. [PMID: 37937686 DOI: 10.1111/cge.14449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 10/17/2023] [Accepted: 10/18/2023] [Indexed: 11/09/2023]
Abstract
Amelogenesis imperfecta (AI) represents a group of clinically and genetically heterogeneous disorders that affect enamel formation and mineralization. Although AI is commonly considered a monogenic disorder, digenic inheritance is rarely reported. In this study, we recruited two nonconsanguineous Chinese families exhibiting diverse phenotypes of enamel defects among affected family members. Digenic variants were discovered in both probands. In family 1, the proband inherited a paternal frameshift variant in LAMA3 (NM_198129.4:c.3712dup) and a maternal deletion encompassing the entire AMELX gene. This resulted in a combined hypoplastic and hypomineralized AI phenotype, which was distinct from the parents' manifestations. In family 2, whole-exome sequencing analysis revealed the proband carried a maternal heterozygous splicing variant in COL17A1 (NC_000010.11 (NM_000494.3): c.4156 + 2dup) and compound heterozygous variants in RELT (paternal: NM_032871.4:c.260A > T; maternal: NM_032871.4:c.521 T > G). These genetic changes caused the abundant irregular enamel defects observed in the proband, whereas other affected family members carrying heterozygous variants in both COL17A1 and RELT displayed only horizontal grooves as their phenotype. The pathogenicity of the novel COL17A1 splice site variant was confirmed through RT-PCR and minigene assay. This study enhances our understanding by highlighting the potential association between the co-occurrence of variants in two genes and variable phenotypes observed in AI patients.
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Affiliation(s)
- Yi Yang
- Department of Pediatric Dentistry, Peking University School and Hospital of Stomatology, Beijing, People's Republic of China
| | - Man Qin
- Department of Pediatric Dentistry, Peking University School and Hospital of Stomatology, Beijing, People's Republic of China
| | - Yuming Zhao
- Department of Pediatric Dentistry, Peking University School and Hospital of Stomatology, Beijing, People's Republic of China
| | - Xin Wang
- Department of Pediatric Dentistry, Peking University School and Hospital of Stomatology, Beijing, People's Republic of China
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Liu Y, Sun J, Zhang C, Wu Y, Ma S, Li X, Wu X, Gao Q. Compound heterozygous WNT10A missense variations exacerbated the tooth agenesis caused by hypohidrotic ectodermal dysplasia. BMC Oral Health 2024; 24:136. [PMID: 38280992 PMCID: PMC10822191 DOI: 10.1186/s12903-024-03888-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Accepted: 01/12/2024] [Indexed: 01/29/2024] Open
Abstract
BACKGROUND The aim of this study was to analyse the differences in the phenotypes of missing teeth between a pair of brothers with hypohidrotic ectodermal dysplasia (HED) and to investigate the underlying mechanism by comparing the mutated gene loci between the brothers with whole-exome sequencing. METHODS The clinical data of the patients and their mother were collected, and genomic DNA was extracted from peripheral blood samples. By Whole-exome sequencing filtered for a minor allele frequency (MAF) ≤0.05 non-synonymous single-nucleotide variations and insertions/deletions variations in genes previously associated with tooth agenesis, and variations considered as potentially pathogenic were assessed by SIFT, Polyphen-2, CADD and ACMG. Sanger sequencing was performed to detect gene variations. The secondary and tertiary structures of the mutated proteins were predicted by PsiPred 4.0 and AlphaFold 2. RESULTS Both brothers were clinically diagnosed with HED, but the younger brother had more teeth than the elder brother. An EDA variation (c.878 T > G) was identified in both brothers. Additionally, compound heterozygous variations of WNT10A (c.511C > T and c.637G > A) were identified in the elder brother. Digenic variations in EDA (c.878 T > G) and WNT10A (c.511C > T and c.637G > A) in the same patient have not been reported previously. The secondary structure of the variant WNT10A protein showed changes in the number and position of α-helices and β-folds compared to the wild-type protein. The tertiary structure of the WNT10A variant and molecular simulation docking showed that the site and direction where WNT10A binds to FZD5 was changed. CONCLUSIONS Compound heterozygous WNT10A missense variations may exacerbate the number of missing teeth in HED caused by EDA variation.
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Affiliation(s)
- Yiting Liu
- The Stomatology Center of Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan, 410008, China
- Academician Workstation for Oral & Maxillofacial Regenerative Medicine, Central South University, Changsha, Hunan Province, China
- Research Center of Oral and Maxillofacial Development and Regeneration, Xiangya Hospital, Central South University, Changsha, Hunan Province, China
- National Clinical Research Center for Geriatric Diseases, Xiangya Hospital, Central South University, Changsha, Hunan Province, China
| | - Jing Sun
- The Stomatology Center of Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan, 410008, China
- Academician Workstation for Oral & Maxillofacial Regenerative Medicine, Central South University, Changsha, Hunan Province, China
- Research Center of Oral and Maxillofacial Development and Regeneration, Xiangya Hospital, Central South University, Changsha, Hunan Province, China
- National Clinical Research Center for Geriatric Diseases, Xiangya Hospital, Central South University, Changsha, Hunan Province, China
| | - Caiqi Zhang
- The Stomatology Center of Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan, 410008, China
- Academician Workstation for Oral & Maxillofacial Regenerative Medicine, Central South University, Changsha, Hunan Province, China
- Research Center of Oral and Maxillofacial Development and Regeneration, Xiangya Hospital, Central South University, Changsha, Hunan Province, China
- National Clinical Research Center for Geriatric Diseases, Xiangya Hospital, Central South University, Changsha, Hunan Province, China
| | - Yi Wu
- The Stomatology Center of Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan, 410008, China
- Academician Workstation for Oral & Maxillofacial Regenerative Medicine, Central South University, Changsha, Hunan Province, China
- Research Center of Oral and Maxillofacial Development and Regeneration, Xiangya Hospital, Central South University, Changsha, Hunan Province, China
- National Clinical Research Center for Geriatric Diseases, Xiangya Hospital, Central South University, Changsha, Hunan Province, China
| | - Siyuan Ma
- The Stomatology Center of Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan, 410008, China
- Academician Workstation for Oral & Maxillofacial Regenerative Medicine, Central South University, Changsha, Hunan Province, China
- Research Center of Oral and Maxillofacial Development and Regeneration, Xiangya Hospital, Central South University, Changsha, Hunan Province, China
- National Clinical Research Center for Geriatric Diseases, Xiangya Hospital, Central South University, Changsha, Hunan Province, China
| | - Xuechun Li
- The Stomatology Center of Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan, 410008, China
- Academician Workstation for Oral & Maxillofacial Regenerative Medicine, Central South University, Changsha, Hunan Province, China
- Research Center of Oral and Maxillofacial Development and Regeneration, Xiangya Hospital, Central South University, Changsha, Hunan Province, China
- National Clinical Research Center for Geriatric Diseases, Xiangya Hospital, Central South University, Changsha, Hunan Province, China
| | - Xiaoshan Wu
- The Stomatology Center of Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan, 410008, China.
- Academician Workstation for Oral & Maxillofacial Regenerative Medicine, Central South University, Changsha, Hunan Province, China.
- Research Center of Oral and Maxillofacial Development and Regeneration, Xiangya Hospital, Central South University, Changsha, Hunan Province, China.
- National Clinical Research Center for Geriatric Diseases, Xiangya Hospital, Central South University, Changsha, Hunan Province, China.
- Beijing Laboratory of Oral Health, Capital Medical University, Beijing, China.
| | - Qingping Gao
- The Stomatology Center of Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan, 410008, China.
- Academician Workstation for Oral & Maxillofacial Regenerative Medicine, Central South University, Changsha, Hunan Province, China.
- Research Center of Oral and Maxillofacial Development and Regeneration, Xiangya Hospital, Central South University, Changsha, Hunan Province, China.
- National Clinical Research Center for Geriatric Diseases, Xiangya Hospital, Central South University, Changsha, Hunan Province, China.
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Wu Y, Sun J, Zhang C, Ma S, Liu Y, Wu X, Gao Q. The oligodontia phenotype in a X-linked hypohidrotic ectodermal dysplasia patient with a novel EVC2 variant. Heliyon 2024; 10:e23056. [PMID: 38163170 PMCID: PMC10756976 DOI: 10.1016/j.heliyon.2023.e23056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 10/27/2023] [Accepted: 11/24/2023] [Indexed: 01/03/2024] Open
Abstract
Objectives To analyse the pathogenic genes in a patient with hypohidrotic ectodermal dysplasia (HED) and explore the relationship between pathogenic genes and the oligodontia phenotype. Methods Clinical data and peripheral blood were collected from a patient with HED. Pathogenic genes were analysed by whole-exon sequencing (WES) and verified by Singer sequencing. The secondary and tertiary structures of the variant proteins were predicted to analyse their toxicity. Results The patient exhibited a severe oligodontia phenotype, wherein only two deciduous canines were left in the upper jaw. WES revealed a hemizygous EDA variant c.466C > T p.(Arg156Cys) and a novel heterozygous EVC2 variant c.1772T > C p.(Leu591Ser). Prediction of the secondary and tertiary structures of the EDA variant p.(Arg156Cys) and EVC2 variant p.(Leu591Ser) indicated impaired function of both molecules. Conclusion The patient demonstrated a more severe oligodontia phenotype when compared with the other patients caused by the EDA variant c.466C > T. Since Evc2 is a positive regulator of the Sonic Hedgehog (Shh) signal pathway, we speculated that the EVC2 variant p.(Leu591Ser) may play a synergistic role in the oligodontia phenotype of HED, thereby exacerbating the oligodontia phenotype. Knowledge of oligodontia caused by multiple gene variants is of great significance for understanding individual differences in oligodontia phenotypes.
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Affiliation(s)
- Yi Wu
- The Stomatology Center of Xiangya Hospital, Academician Workstation for Oral & Maxillofacial Regenerative Medicine, Research Center of Oral and Maxillofacial Development and Regeneration, National Clinical Research Center for Geriatric Diseases, Central South Universtiy, Changsha, Hunan Province, China
| | - Jing Sun
- The Stomatology Center of Xiangya Hospital, Academician Workstation for Oral & Maxillofacial Regenerative Medicine, Research Center of Oral and Maxillofacial Development and Regeneration, National Clinical Research Center for Geriatric Diseases, Central South Universtiy, Changsha, Hunan Province, China
| | - Caiqi Zhang
- The Stomatology Center of Xiangya Hospital, Academician Workstation for Oral & Maxillofacial Regenerative Medicine, Research Center of Oral and Maxillofacial Development and Regeneration, National Clinical Research Center for Geriatric Diseases, Central South Universtiy, Changsha, Hunan Province, China
| | - Siyuan Ma
- The Stomatology Center of Xiangya Hospital, Academician Workstation for Oral & Maxillofacial Regenerative Medicine, Research Center of Oral and Maxillofacial Development and Regeneration, National Clinical Research Center for Geriatric Diseases, Central South Universtiy, Changsha, Hunan Province, China
| | - Yiting Liu
- The Stomatology Center of Xiangya Hospital, Academician Workstation for Oral & Maxillofacial Regenerative Medicine, Research Center of Oral and Maxillofacial Development and Regeneration, National Clinical Research Center for Geriatric Diseases, Central South Universtiy, Changsha, Hunan Province, China
| | - Xiaoshan Wu
- The Stomatology Center of Xiangya Hospital, Academician Workstation for Oral & Maxillofacial Regenerative Medicine, Research Center of Oral and Maxillofacial Development and Regeneration, National Clinical Research Center for Geriatric Diseases, Central South Universtiy, Changsha, Hunan Province, China
- Hunan Key Laboratory of Aging Biology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Qingping Gao
- The Stomatology Center of Xiangya Hospital, Academician Workstation for Oral & Maxillofacial Regenerative Medicine, Research Center of Oral and Maxillofacial Development and Regeneration, National Clinical Research Center for Geriatric Diseases, Central South Universtiy, Changsha, Hunan Province, China
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Chen SC, Zhou XY, Li SY, Zhao MM, Huang HF, Jia J, Xu CM. Carrier burden of over 300 diseases in Han Chinese identified by expanded carrier testing of 300 couples using assisted reproductive technology. J Assist Reprod Genet 2023; 40:2157-2173. [PMID: 37450097 PMCID: PMC10440320 DOI: 10.1007/s10815-023-02876-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 06/22/2023] [Indexed: 07/18/2023] Open
Abstract
BACKGROUND Expanded carrier screening (ECS) has become a common practice for identifying carriers of monogenic diseases. However, existing large gene panels are not well-tailored to Chinese populations. In this study, ECS testing for pathogenic variants of both single-nucleotide variants (SNVs) and copy number variants (CNVs) in 330 genes implicated in 342 autosomal recessive (AR) or X-linked diseases was carried out. We assessed the differences in allele frequencies specific to the Chinese population who have used assisted reproductive technology (ART) and the important genes to screen for in this population. METHODOLOGY A total of 300 heterosexual couples were screened by our ECS panel using next-generation sequencing. A customed bioinformatic algorithm was used to analyze SNVs and CNVs. Guidelines from the American College of Medical Genetics and Genomics and the Association for Molecular Pathology were adapted for variant interpretation. Pathogenic or likely pathogenic (P/LP) SNVs located in high homology regions/deletions and duplications of one or more exons in length were independently verified with other methods. RESULTS 64.83% of the patients were identified to be carriers of at least one of 342 hereditary conditions. We identified 622 P/LP variants, 4.18% of which were flagged as CNVs. The rate of at-risk couples was 3%. A total of 149 AR diseases accounted for 64.05% of the cumulative carrier rate, and 48 diseases had a carrier rate above 1/200 in the test. CONCLUSION An expanded screening of inherited diseases by incorporating different variant types, especially CNVs, has the potential to reduce the occurrence of severe monogenic diseases in the offspring of patients using ART in China.
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Affiliation(s)
- Song-Chang Chen
- Obstetrics and Gynecology Hospital, Institute of Reproduction and Development, Fudan University, 566 Fangxie Road, Huangpu District, Shanghai, 200001, China
- International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200030, China
| | - Xuan-You Zhou
- Obstetrics and Gynecology Hospital, Institute of Reproduction and Development, Fudan University, 566 Fangxie Road, Huangpu District, Shanghai, 200001, China
- International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200030, China
| | - Shu-Yuan Li
- International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200030, China
| | - Ming-Min Zhao
- Fujungenetics Biotechnology Co., Ltd., No. 70 of Tongchuan Road, Putuo District, Shanghai, 200333, China
| | - He-Feng Huang
- Obstetrics and Gynecology Hospital, Institute of Reproduction and Development, Fudan University, 566 Fangxie Road, Huangpu District, Shanghai, 200001, China
- International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200030, China
- Research Units of Embryo Original Diseases, Chinese Academy of Medical Sciences (No. 2019RU056), Shanghai, China
| | - Jia Jia
- Fujungenetics Biotechnology Co., Ltd., No. 70 of Tongchuan Road, Putuo District, Shanghai, 200333, China.
| | - Chen-Ming Xu
- Obstetrics and Gynecology Hospital, Institute of Reproduction and Development, Fudan University, 566 Fangxie Road, Huangpu District, Shanghai, 200001, China.
- International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200030, China.
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Brancher JA, Schuh R, Torres MFP, de Melo Teixeira do Brasil J, Hueb MA, Dos Santos Haemmerle CA, Proff P, Alam MK, Kirschneck C, Küchler EC. Assessing the relationship between single nucleotide polymorphisms in Wingless signaling pathway genes and sella turcica morphology. J Anat 2023; 243:167-173. [PMID: 36898853 PMCID: PMC10273339 DOI: 10.1111/joa.13855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 02/08/2023] [Accepted: 02/16/2023] [Indexed: 03/12/2023] Open
Abstract
Sella turcica development involves molecular factors and genes responsible for ossification. It is possible that single nucleotide polymorphisms (SNPs) in key genes are involved in morphological variation of sella turcica. Genes belonging to the WNT signaling pathway are involved in the ossification process and are candidates of sella turcica morphology. This study aimed to evaluate if SNPs in WNT6 (rs6754599) and WNT10A (rs10177996 and rs3806557) genes are associated with the calcification and patterns of the sella turcica. Nonsyndromic individuals were included in the research. Cephalometric radiographs were examined and the sella calcification was evaluated and classified according to the calcification of the interclinoid ligament (no calcification, partial calcification, and incomplete calcification) and sella turcica pattern (normal sella turcica, bridge type A-ribbon-like fusion, bridge type B-extension of the clinoid processes, incomplete bridge, hypertrophic posterior clinoid process, hypotrophic posterior clinoid process, irregularity in the posterior part, pyramidal shape of the dorsum, double contour of the floor, oblique anterior wall, and oblique contour of the floor). DNA samples were used to evaluate SNPs in the WNT genes (rs6754599, rs10177996, and rs3806557) using real-time PCR. Chi-square test or Fisher's exact test were used to compare the allele and genotype distributions according to sella turcica phenotypes. The alpha was set as 5% for all comparisons. A total of 169 individuals were included, 133 (78.7%) present sella turcica partially or completely calcified. Sella turcica anomalies were found in 131 individuals (77.5%). Sella turcica bridge type A (27.8%), posterior hypertrophic clinoid process (17.1%), and sella turcica bridge type B (11.2%) were the most prevalent morphological patterns observed. Individuals carrying the TT genotype in rs10177996 (TT vs. CT + CC) had higher chance to present a partially calcified sella turcica (p = 0.047; Odds ratio = 2.27, Confidence Interval 95% 1.01-5.13). In conclusion, the SNP in WNT10A is associated with the calcification phenotype of the sella turcica, the pleiotropic effect of this gene should be taken into consideration in future studies.
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Affiliation(s)
| | - Rodrigo Schuh
- Anatomy Department, Federal University of Paraná, Curitiba, Paraná, Brazil
| | | | | | - Maria Angélica Hueb
- Department of Biomaterials, University of Uberaba-UNIUBE, Uberaba, Minas Gerais, Brazil
| | | | - Peter Proff
- Department of Orthodontics, University of Regensburg, Regensburg, Germany
| | | | | | - Erika Calvano Küchler
- Department of Biomaterials, University of Uberaba-UNIUBE, Uberaba, Minas Gerais, Brazil
- Department of Orthodontics, University of Regensburg, Regensburg, Germany
- School of Dentistry, Tuiuti University from Paraná, Curitiba, Paraná, Brazil
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Chu KY, Wang YL, Chen JT, Lin CH, Yao CCJ, Chen YJ, Chen HW, Simmer JP, Hu JCC, Wang SK. PAX9 mutations and genetic synergism in familial tooth agenesis. Ann N Y Acad Sci 2023; 1524:87-96. [PMID: 37005710 PMCID: PMC10330062 DOI: 10.1111/nyas.14988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2023]
Abstract
Familial tooth agenesis (FTA) is one of the most common craniofacial anomalies in humans. Loss-of-function mutations in PAX9 and WNT10A have been known to cause FTA with various expressivity. In this study, we identified five FTA kindreds with novel PAX9 disease-causing mutations: p.(Glu7Lys), p.(Val83Leu), p.(Pro118Ser), p.(Ser197Argfs*23), and c.771+4A>G. Concomitant PAX9 and WNT10A pathogenic variants found in two probands with severe phenotypes suggested an effect of mutational synergism. All overexpressed PAX9s showed proper nuclear localization, excepting the p.(Pro118Ser) mutant. Various missense mutations caused differential loss of PAX9 transcriptional ability. PAX9 overexpression in dental pulp cells upregulated LEF1 and AXIN2 expression, indicating a positive regulatory role for PAX9 in canonical Wnt signaling. Analyzing 176 cases with 63 different mutations, we observed a distinct pattern of tooth agenesis for PAX9-associated FTA: Maxillary teeth are in general more frequently affected than mandibular ones. Along with all second molars, maxillary bicuspids and first molars are mostly involved, while maxillary lateral incisors and mandibular bicuspids are relatively less affected. Genotypically, missense mutations are associated with fewer missing teeth than frameshift and nonsense variants. This study significantly expands the phenotypic and genotypic spectrums of PAX9-associated disorders and reveals a molecular mechanism of genetic synergism underlying FTA variable expressivity.
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Affiliation(s)
- Kuan-Yu Chu
- Department of Dentistry, National Taiwan University School of Dentistry, No.1, Taipei City, Taiwan
- Department of Pediatric Dentistry, National Taiwan University Children’s Hospital, Taipei City, Taiwan
| | - Yin-Lin Wang
- Department of Dentistry, National Taiwan University School of Dentistry, No.1, Taipei City, Taiwan
- Department of Pediatric Dentistry, National Taiwan University Children’s Hospital, Taipei City, Taiwan
| | - Jung-Tsu Chen
- Department of Dentistry, National Taiwan University School of Dentistry, No.1, Taipei City, Taiwan
| | - Chia-Hui Lin
- Department of Dentistry, National Taiwan University School of Dentistry, No.1, Taipei City, Taiwan
| | - Chung-Chen Jane Yao
- Department of Dentistry, National Taiwan University School of Dentistry, No.1, Taipei City, Taiwan
| | - Yi-Jane Chen
- Department of Dentistry, National Taiwan University School of Dentistry, No.1, Taipei City, Taiwan
| | - Huan-Wen Chen
- Department of Pediatric Dentistry, National Taiwan University Children’s Hospital, Taipei City, Taiwan
| | - James P. Simmer
- Department of Biologic and Materials Sciences, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
| | - Jan C.-C. Hu
- Department of Biologic and Materials Sciences, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
| | - Shih-Kai Wang
- Department of Dentistry, National Taiwan University School of Dentistry, No.1, Taipei City, Taiwan
- Department of Pediatric Dentistry, National Taiwan University Children’s Hospital, Taipei City, Taiwan
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Wredenhagen MS, Goldstein A, Mathieu H, Miranda V, Morali B, Santerre J, Maftei C, Delrue MA, Schmittbuhl M, Vu DD, Moldovan F, Campeau PM. The Quebec Dental Anomalies Registry: Identifying genes for rare disorders. PNAS NEXUS 2023; 2:pgad196. [PMID: 37361548 PMCID: PMC10290489 DOI: 10.1093/pnasnexus/pgad196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 03/28/2023] [Accepted: 05/23/2023] [Indexed: 06/28/2023]
Abstract
There are more than 900 genetic syndromes associated with oral manifestations. These syndromes can have serious health implications, and left undiagnosed, can hamper treatment and prognosis later in life. About 6.67% of the population will develop a rare disease during their lifetime, some of which are difficult to diagnose. The establishment of a data and tissue bank of rare diseases with oral manifestations in Quebec will help medical professionals identify the genes involved, will improve knowledge on the rare genetic diseases, and will also lead to improved patient management. It will also allow samples and information sharing with other clinicians and investigators. As an example of a condition requiring additional research, dental ankylosis is a condition in which the tooth's cementum fuses to the surrounding alveolar bone. This can be secondary to traumatic injury but is often idiopathic, and the genes involved in the idiopathic cases, if any, are poorly known. To date, patients with both identified and unidentified genetic etiology for their dental anomalies were recruited through dental and genetics clinics for the study. They underwent sequencing of selected genes or exome sequencing depending on the manifestation. We recruited 37 patients and we identified pathogenic or likely pathogenic variants in WNT10A, EDAR, AMBN, PLOD1, TSPEAR, PRKAR1A, FAM83H, PRKACB, DLX3, DSPP, BMP2, TGDS. Our project led to the establishment of the Quebec Dental Anomalies Registry, which will help researchers, medical and dental practitioners alike understand the genetics of dental anomalies and facilitate research collaborations into improved standards of care for patients with rare dental anomalies and any accompanying genetic diseases.
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Affiliation(s)
- Madeleine S Wredenhagen
- CHU Sainte-Justine Research Center, 3175 Chemin de la Côte-Sainte-Catherine, Montreal, QC, Canada, H3T1C5 and University of Ottawa, 75 Laurier Ave E, Ottawa, ON, Canada K1N 6N5
| | - Andee Goldstein
- CHU Sainte-Justine Research Center, 3175 Chemin de la Côte-Sainte-Catherine, Montreal, QC, Canada, H3T1C5 and Université de Montréal, 2900 Edouard Montpetit Boulevard, Montreal, QC, Canada, H3T1C5
| | - Hélène Mathieu
- CHU Sainte-Justine Research Center, 3175 Chemin de la Côte-Sainte-Catherine, Montreal, QC, Canada, H3T1C5 and Université de Montréal, 2900 Edouard Montpetit Boulevard, Montreal, QC, Canada, H3T1C5
| | - Valancy Miranda
- Department of Pediatrics, CHU Sainte-Justine Research Center, 3175 Chemin de la Côte-Sainte-Catherine, Montreal, QC, Canada, H3T1C5
| | - Burcin Morali
- Department of Pediatrics, CHU Sainte-Justine, 3175 Chemin de la Côte-Sainte-Catherine, Montreal, QC, Canada, H3T1C5
| | - Jacinthe Santerre
- Department of Pediatrics, CHU Sainte-Justine, 3175 Chemin de la Côte-Sainte-Catherine, Montreal, QC, Canada, H3T1C5
| | - Catalina Maftei
- CHU Sainte-Justine, Genetic Service, 3175 Chemin de la Côte-Sainte-Catherine, Montreal, QC, Canada, H3T1C5
| | - Marie-Ange Delrue
- Department of Pediatrics, CHU Sainte-Justine, 3175 Chemin de la Côte-Sainte-Catherine, Montreal, QC, Canada, H3T1C5
| | - Matthieu Schmittbuhl
- Faculty of Dentistry, Department of Stomatology, Université of Montréal, 2900 Edouard Montpetit Boulevard, Montreal, QC, Canada H3T 1J4
| | - Duy Dat Vu
- Faculty of Dentistry, Université of Montréal, 2900 Edouard Montpetit Boulevard, Montreal, QC, Canada H3T 1J4
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9
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Gao Y, Jiang X, Wei Z, Long H, Lai W. The EDA/EDAR/NF-κB pathway in non-syndromic tooth agenesis: A genetic perspective. Front Genet 2023; 14:1168538. [PMID: 37077539 PMCID: PMC10106650 DOI: 10.3389/fgene.2023.1168538] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 03/23/2023] [Indexed: 04/05/2023] Open
Abstract
Non-syndromic tooth agenesis (NSTA) is one of the most common dental developmental malformations affected by genetic factors predominantly. Among all 36 candidate genes reported in NSTA individuals, EDA, EDAR, and EDARADD play essential roles in ectodermal organ development. As members of the EDA/EDAR/NF-κB signaling pathway, mutations in these genes have been implicated in the pathogenesis of NSTA, as well as hypohidrotic ectodermal dysplasia (HED), a rare genetic disorder that affects multiple ectodermal structures, including teeth. This review provides an overview of the current knowledge on the genetic basis of NSTA, with a focus on the pathogenic effects of the EDA/EDAR/NF-κB signaling pathway and the role of EDA, EDAR, and EDARADD mutations in developmental tooth defects. We also discuss the phenotypic overlap and genetic differences between NSTA and HED. Ultimately, this review highlights the importance of genetic analysis in diagnosing and managing NSTA and related ectodermal disorders, and the need for ongoing research to improve our understanding of these conditions.
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Affiliation(s)
- Yanzi Gao
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
- Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Xiaohui Jiang
- Human Sperm Bank, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, China
| | - Zhi Wei
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
- Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Hu Long
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
- Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Wenli Lai
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
- Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
- *Correspondence: Wenli Lai,
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Fan L, Ma L, Zhu G, Yao S, Li X, Yu X, Pan Y, Wang L. A Genome-wide association study of premolar agenesis in a chinese population. Oral Dis 2023; 29:1102-1114. [PMID: 34878701 DOI: 10.1111/odi.14095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Revised: 11/14/2021] [Accepted: 11/28/2021] [Indexed: 11/27/2022]
Abstract
OBJECTIVE Premolar agenesis is a common subtype of tooth agenesis. Although a genome-wide study (GWAS) has identified some variants involved in tooth agenesis in Europeans, the genetic mutation related to premolar agenesis in the Chinese population remains unclear. MATERIALS AND METHODS We present a GWAS in 218 premolar agenesis cases and 1,222 controls using the Illumina Infinium® Global Screening Array. 5,585,618 single nucleotide polymorphisms (SNPs) were used for tests of associations with premolar agenesis. RESULTS Four independent SNPs on chromosome 2 were identified as susceptibility loci, including rs147680216, rs79743039, rs60540881, and rs6738629. The genome-wide significant SNP rs147680216 (p = 6.09 × 10-9 ) was predicted to change the structure of the WNT10A protein and interact with hedgehog signaling pathway components. Meta-analysis showed that the rs147680216 A allele significantly increased the risk of tooth agenesis (p = 0.000). The other three SNPs with nominal significance are novel susceptibility loci. Of them, rs6738629 (p = 5.40 × 10-6 ) acts as a potential transcriptional regulator of GCC2, a gene playing a putative role in dental and craniofacial development. CONCLUSION Our GWAS indicates that rs147680216 and additional three novel susceptibility loci on chromosome 2 are associated with the risk of premolar agenesis in the Chinese population.
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Affiliation(s)
- Liwen Fan
- Department of Orthodontics, The Affiliated Stomatology Hospital of Nanjing Medical University, Nanjing, China
- Jiangsu Province Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China
- Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing Medical University, Nanjing, China
| | - Lan Ma
- Department of Orthodontics, The Affiliated Stomatology Hospital of Nanjing Medical University, Nanjing, China
- Jiangsu Province Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China
- Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing Medical University, Nanjing, China
| | - Guirong Zhu
- Department of Orthodontics, The Affiliated Stomatology Hospital of Nanjing Medical University, Nanjing, China
- Jiangsu Province Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China
- Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing Medical University, Nanjing, China
| | - Siyue Yao
- Department of Orthodontics, The Affiliated Stomatology Hospital of Nanjing Medical University, Nanjing, China
- Jiangsu Province Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China
- Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing Medical University, Nanjing, China
| | - Xiaofeng Li
- Department of Orthodontics, The Affiliated Stomatology Hospital of Nanjing Medical University, Nanjing, China
- Jiangsu Province Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China
- Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing Medical University, Nanjing, China
| | - Xin Yu
- Department of Orthodontics, The Affiliated Stomatology Hospital of Nanjing Medical University, Nanjing, China
- Jiangsu Province Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China
- Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing Medical University, Nanjing, China
| | - Yongchu Pan
- Department of Orthodontics, The Affiliated Stomatology Hospital of Nanjing Medical University, Nanjing, China
- Jiangsu Province Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China
- Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing Medical University, Nanjing, China
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing, China
| | - Lin Wang
- Department of Orthodontics, The Affiliated Stomatology Hospital of Nanjing Medical University, Nanjing, China
- Jiangsu Province Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China
- Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing Medical University, Nanjing, China
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing, China
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11
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Yoshinaga K, Yasue A, Mitsui SN, Minegishi Y, Oyadomari S, Imoto I, Tanaka E. Effects of Wnt10a and Wnt10b Double Mutations on Tooth Development. Genes (Basel) 2023; 14:genes14020340. [PMID: 36833267 PMCID: PMC9957325 DOI: 10.3390/genes14020340] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Revised: 01/22/2023] [Accepted: 01/24/2023] [Indexed: 02/03/2023] Open
Abstract
WNT molecules are the regulators of various biological functions, including body axis formation, organ development, and cell proliferation and differentiation. WNTs have been extensively studied as causative genes for an array of diseases. WNT10A and WNT10B, which are considered to be genes of the same origin, have been identified as causative genes for tooth deficiency in humans. However, the disrupted mutant of each gene does not show a decrease in teeth number. A negative feedback loop, interacting with several ligands based on a reaction-diffusion mechanism, was proposed to be important for the spatial patterning of tooth formation, and WNT ligands have been considered to play a pivotal role in controlling tooth patterning from mutant phenotypes of LDL receptor-related proteins (LRPs) and WNT co-receptors. The Wnt10a and Wnt10b double-mutants demonstrated severe root or enamel hypoplasia. In Wnt10a-/- and Wnt10a+/-;Wnt10b-/- mice, changes in the feedback loop may collapse the modulation of fusion or split a sequence of tooth formation. However, in the double-knockout mutant, a decrease in the number of teeth was observed, including the upper incisor or third molar in both jaws. These findings suggest that there may be a functional redundancy between Wnt10a and Wnt10b and that the interaction between the two genes functions in conjunction with other ligands to control the spatial patterning and development of teeth.
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Affiliation(s)
- Kaoru Yoshinaga
- Department of Orthodontics and Dentofacial Orthopedics, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto-cho, Tokushima 770-8504, Japan
| | - Akihiro Yasue
- Department of Orthodontics and Dentofacial Orthopedics, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto-cho, Tokushima 770-8504, Japan
- Nakano-Cho niconicoKamKam Dental and Orthodontics, 1-31 Nakano-cho, Tokushima 770-0932, Japan
- Correspondence: ; Tel.: +81-88-6337357; Fax: +81-88-6339139
| | - Silvia Naomi Mitsui
- Department of Orthodontics and Dentofacial Orthopedics, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto-cho, Tokushima 770-8504, Japan
| | - Yoshiyuki Minegishi
- Division of Molecular Medicine, Institute of Advanced Enzyme Research, Tokushima University, 3-18-15 Kuramoto-cho, Tokushima 770-8503, Japan
| | - Seiichi Oyadomari
- Division of Molecular Biology, Institute of Advanced Enzyme Research, Tokushima University, 3-18-15 Kuramoto-cho, Tokushima 770-8503, Japan
| | - Issei Imoto
- Aichi Cancer Center Research Institute, 1-1 Kanokoden Chikusa-ku, Nagoya 464-8681, Japan
| | - Eiji Tanaka
- Department of Orthodontics and Dentofacial Orthopedics, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto-cho, Tokushima 770-8504, Japan
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12
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Liu H, Lin B, Liu H, Su L, Feng H, Liu Y, Yu M, Han D. Dose Dependence Effect in Biallelic WNT10A Variant-Associated Tooth Agenesis Phenotype. Diagnostics (Basel) 2022; 12:diagnostics12123087. [PMID: 36553094 PMCID: PMC9776737 DOI: 10.3390/diagnostics12123087] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 11/27/2022] [Accepted: 11/30/2022] [Indexed: 12/13/2022] Open
Abstract
The goal of this study was to identify the pathogenic gene variants in patients with odonto-onycho-dermal dysplasia syndrome (OODD) or nonsyndromic tooth agenesis. Four unrelated individuals with tooth agenesis and their available family members were recruited. Peripheral blood was collected from four probands and five family members. Whole-exome sequencing (WES) and Sanger sequencing were used to identify the pathogenic gene variants. The harmfulness of these variations was predicted by bioinformatics. We identified four biallelic variants of the WNT10A gene in four patients, respectively: the proband#660: c.1176C > A (p.Cys392*) and c.812G > A (p.Cys271Tyr); the proband#681: c.637G > A (p.Gly213Ser) and c.985C > T (p.Arg329*); the proband#829: c.511C > T (p.Arg171Cys) and c.637G > A (p.Gly213Ser); and the proband#338: c.926A> G (p.Gln309Arg) and c.511C > T (p.Arg171Cys). Among them, two variants (c.812G > A; p.Cys271Tyr and c.985C > T; p.Arg329*) were previously unreported. Bioinformatics analysis showed that the pathogenicity of these six variants was different. Tertiary structure analysis showed that these variants were predicted to cause structural damage to the WNT10A protein. Genotype−phenotype analysis showed that the biallelic variants with more harmful effects, such as nonsense variants, caused OODD syndrome (#660 Ⅱ-1) or severe nonsyndromic tooth agenesis (NSTA) (#681 Ⅱ-1); the biallelic variants with less harmful effects, such as missense variants, caused a mild form of NSTA (#829 Ⅱ-2 and #338 Ⅱ-1). Individuals with a heterozygous variant presented a mild form of NSTA or a normal state. Our results further suggest the existence of the dose dependence of WNT10A pathogenicity on the tooth agenesis pattern, which broadens the variation spectrum and phenotype spectrum of WNT10A and could help with clinical diagnosis, treatment, and genetic counseling.
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Affiliation(s)
- Haochen Liu
- Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing 100081, China
| | - Bichen Lin
- First Clinical Division, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing 100081, China
| | - Hangbo Liu
- Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing 100081, China
| | - Lanxin Su
- Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing 100081, China
| | - Hailan Feng
- Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing 100081, China
| | - Yang Liu
- Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing 100081, China
| | - Miao Yu
- Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing 100081, China
- Correspondence: (M.Y.); (D.H.); Fax: +86-10-8210-5259 (M.Y.); +86-10-6217-3402 (D.H.)
| | - Dong Han
- Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing 100081, China
- Correspondence: (M.Y.); (D.H.); Fax: +86-10-8210-5259 (M.Y.); +86-10-6217-3402 (D.H.)
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13
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Novel Candidate Genes for Non-Syndromic Tooth Agenesis Identified Using Targeted Next-Generation Sequencing. J Clin Med 2022; 11:jcm11206089. [PMID: 36294409 PMCID: PMC9605476 DOI: 10.3390/jcm11206089] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 10/10/2022] [Accepted: 10/14/2022] [Indexed: 11/05/2022] Open
Abstract
Non-syndromic tooth agenesis (ns-TA) is one of the most common dental anomalies characterized by the congenital absence of at least one permanent tooth (excluding third molars). Regarding the essential role of genetic factors in ns-TA aetiology, the present study aimed to identify novel pathogenic variants underlying hypodontia and oligodontia. In a group of 65 ns-TA patients and 127 healthy individuals from the genetically homogenous Polish population, the coding sequences of 423 candidate genes were screened using targeted next-generation sequencing. Pathogenic and likely pathogenic variants were identified in 37 (56.92%) patients, including eight nucleotide alternations of genes not previously implicated in ns-TA (CHD7, CREBBP, EVC, LEF1, ROR2, TBX22 and TP63). However, since only single variants were detected, future research is required to confirm and fully understand their role in the aetiology of ns-TA. Additionally, our results support the importance of already known ns-TA candidate genes (AXIN2, EDA, EDAR, IRF6, LAMA3, LRP6, MSX1, PAX9 and WNT10A) and provide additional evidence that ns-TA might be an oligogenic condition involving the cumulative effect of rare variants in two or more distinct genes.
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14
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Keskin G, Karaer K, Uçar Gündoğar Z. Targeted next-generation sequencing (NGS) analysis of mutations in nonsyndromic tooth agenesis candidate genes : Analysis of a Turkish cohort. J Orofac Orthop 2022; 83:65-74. [PMID: 33725141 DOI: 10.1007/s00056-021-00284-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 02/06/2021] [Indexed: 12/30/2022]
Abstract
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.
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Affiliation(s)
- Gül Keskin
- Department of Pediatric Dentistry, Gaziantep University, 27310, Gaziantep, Turkey.
| | - Kadri Karaer
- Department of Medical Genetics, Pamukkale University, 20070, Denizli, Turkey
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15
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Bielik P, Bonczek O, Krejčí P, Zeman T, Izakovičová-Hollá L, Šoukalová J, Vaněk J, Vojtěšek B, Lochman J, Balcar VJ, Šerý O. WNT10A variants: following the pattern of inheritance in tooth agenesis and self-reported family history of cancer. Clin Oral Investig 2022; 26:7045-7055. [PMID: 35999385 DOI: 10.1007/s00784-022-04664-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 08/02/2022] [Indexed: 11/24/2022]
Abstract
OBJECTIVES The aim of this study was the analysis of WNT10A variants in seven families of probands with various forms of tooth agenesis and self-reported family history of cancer. MATERIALS AND METHODS We enrolled 60 young subjects (aged 13 to 17) from the Czech Republic with various forms of tooth agenesis. Dental phenotypes were assessed using Planmeca ProMax 3D (Planmeca Oy, Finland) with Planmeca Romexis software (version 2.9.2) together with oral examinations. After screening PAX9, MSX1, EDA, EDAR, AXIN2 and WNT10A genes on the Illumina MiSeq platform (Illumina, USA), we further analyzed the evolutionarily highly conserved WNT10A gene by capillary sequencing in the seven families. RESULTS All the detected variants were heterozygous or compound heterozygous with various levels of phenotypic expression. The most severe phenotype (oligodontia) was found in a proband who was compound heterozygous for the previously identified WNT10A variant p.Phe228Ile and a newly discovered c.748G > A variant (p.Gly250Arg) of WNT10A. The newly identified variant causes substitution of hydrophobic glycine for hydrophilic arginine. CONCLUSIONS We suggest that the amino acid changes in otherwise highly conserved sequences significantly affect the dental phenotype. No relationship between the presence of WNT10A variants and a risk of cancer has been found. CLINICAL RELEVANCE Screening of PAX9, MSX1, EDA, EDAR, AXIN2 and WNT10A genes in hope to elucidate the pattern of inheritance in families.
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Affiliation(s)
- Peter Bielik
- Laboratory of Neurobiology and Molecular Psychiatry, Department of Biochemistry, Faculty of Science, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
| | - Ondřej Bonczek
- Research Centre for Applied Molecular Oncology, Masaryk Memorial Cancer Institute, Brno, Czech Republic
| | - Přemysl Krejčí
- Institute of Dentistry and Oral Sciences, Faculty of Medicine and Dentistry, Palacky University, Olomouc, Czech Republic
| | - Tomáš Zeman
- Laboratory of Neurobiology and Molecular Psychiatry, Department of Biochemistry, Faculty of Science, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic.,Laboratory of Neurobiology and Pathological Physiology, Institute of Animal Physiology and Genetics, The Academy of Sciences of the Czech Republic, Brno, Czech Republic
| | - Lydie Izakovičová-Hollá
- Department of Stomatology, Institution Shared With St. Anne's University Hospital, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Jana Šoukalová
- Department of Stomatology, Institution Shared With St. Anne's University Hospital, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Jiří Vaněk
- Department of Stomatology, Institution Shared With St. Anne's University Hospital, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Bořivoj Vojtěšek
- Research Centre for Applied Molecular Oncology, Masaryk Memorial Cancer Institute, Brno, Czech Republic
| | - Jan Lochman
- Laboratory of Neurobiology and Molecular Psychiatry, Department of Biochemistry, Faculty of Science, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic.,Laboratory of Neurobiology and Pathological Physiology, Institute of Animal Physiology and Genetics, The Academy of Sciences of the Czech Republic, Brno, Czech Republic
| | - Vladimir J Balcar
- Laboratory of Neurobiology and Pathological Physiology, Institute of Animal Physiology and Genetics, The Academy of Sciences of the Czech Republic, Brno, Czech Republic.,Faculty of Medicine and Health, Sydney Medical School, The University of Sydney, Sydney, NSW, 2006, Australia
| | - Omar Šerý
- Laboratory of Neurobiology and Molecular Psychiatry, Department of Biochemistry, Faculty of Science, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic. .,Laboratory of Neurobiology and Pathological Physiology, Institute of Animal Physiology and Genetics, The Academy of Sciences of the Czech Republic, Brno, Czech Republic.
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16
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Said NM, Yassin F, Elkreem EA. Wnt10a missense gene polymorphism association with obesity risk: List of literature and a case-control study with Roc analysis for serum β-catenin level in Egypt. GENE REPORTS 2022. [DOI: 10.1016/j.genrep.2022.101496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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17
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Gene Mutations of the Three Ectodysplasin Pathway Key Players ( EDA, EDAR, and EDARADD) Account for More than 60% of Egyptian Ectodermal Dysplasia: A Report of Seven Novel Mutations. Genes (Basel) 2021; 12:genes12091389. [PMID: 34573371 PMCID: PMC8468066 DOI: 10.3390/genes12091389] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 08/30/2021] [Accepted: 09/03/2021] [Indexed: 12/22/2022] Open
Abstract
Ectodermal dysplasia (ED) is a diverse group of genetic disorders caused by congenital defects of two or more ectodermal-derived body structures, namely, hair, teeth, nails, and some glands, e.g., sweat glands. Molecular pathogenesis of ED involves mutations of genes encoding key proteins of major developmental pathways, including ectodysplasin (EDA) and wingless-type (WNT) pathways. The most common ED phenotype is hypohidrotic/anhidrotic ectodermal dysplasia (HED) featuring hypotrichosis, hypohidrosis/anhidrosis, and hypodontia. Molecular diagnosis is fundamental for disease management and emerging treatments. We used targeted next generation sequencing to study EDA, EDAR, EDARADD, and WNT10A genes in 45 Egyptian ED patients with or without hypohidrosis. We present genotype and phenotype data of 28 molecularly-characterized patients demonstrating genetic heterogeneity, variable expressivity, and intrafamilial phenotypic variability. Thirteen mutations were reported, including four novel EDA mutations, two novel EDARADD, and one novel EDAR mutations. Identified mutations congregated in exons encoding key functional domains. EDA is the most common gene contributing to 85% of the identified Egyptian ED genetic spectrum, followed by EDARADD (10%) and EDAR (5%). Our cohort represents the first and largest cohort from North Africa where more than 60% of ED patients were identified emphasizing the need for exome sequencing to explore unidentified cases.
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Caetano da Silva C, Ricquebourg M, Orcel P, Fabre S, Funck‐Brentano T, Cohen‐Solal M, Collet C. More severe phenotype of early-onset osteoporosis associated with recessive form of LRP5 and combination with DKK1 or WNT3A. Mol Genet Genomic Med 2021; 9:e1681. [PMID: 33939331 PMCID: PMC8222848 DOI: 10.1002/mgg3.1681] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 03/23/2021] [Indexed: 12/13/2022] Open
Abstract
Background Early‐onset osteoporosis (EOOP) is defined by low bone mineral density (BMD), which increases the risk of fracture. Although the prevalence of osteoporosis at a young age is unknown, low BMD is highly linked to genetic background. Heterozygous pathogenic variants in low‐density lipoprotein receptor‐related protein 5 (LRP5) are associated with EOOP. This study aimed to investigate the genetic profile in patients with EOOP to better understand the variation in phenotype severity by using a targeted gene sequencing panel associated with bone fragility. Method and Results We used a sequencing panel with 17 genes reported to be related to bone fragility for analysis of 68 patients with EOOP. We found a high positivity rate of EOOP with LRP5 variants (14 patients, 20.6%). The remaining 79.4% of patients with EOOP but without LRP5 variants showed variable disease severity, as observed in patients with at least one variant in this gene. One patient, with multiple fractures and spine L1‐L4 BMD Z‐score −2.9, carried a novel pathogenic homozygous variant, c.2918T>C, p.(Leu973Pro), without any pseudoglioma. In addition to carrying the LRP5 variant, 2 other patients carried a heterozygous variant in Wnt signaling pathway genes: dickkopf WNT signaling pathway inhibitor 1 (DKK1) [NM_012242.4: c.359G>T, p.(Arg120Leu)] and Wnt family member 3A (WNT3A) [NM_033131.3: c.377G>A, p. (Arg126His)]. As compared with single‐variant LRP5 carriers, double‐variant carriers had a significantly lower BMD Z‐score (−4.1 ± 0.8) and higher mean number of fractures (6.0 ± 2.8 vs. 2.2 ± 1.9). Analysis of the family segregation suggests the inheritance of BMD trait. Conclusion Severe forms of EOOP may occur with carriage of 2 pathogenic variants in genes encoding regulators of the Wnt signaling pathway. Two‐variant carriers of Wnt pathway genes had severe EOOP. Moreover, DKK1 and WNT3A genes should be included in next‐generation sequence analyses of bone fragility. Gene association may occur in the same signaling pathway and can generate a severe bone phenotype in early‐onset osteoporosis. Recessive form associated with lipoprotein receptor‐related protein 5 could be responsible for a stronger phenotype. Interestingly this recessive form is not associated with ocular problems as observed in pseudoglioma osteoporosis or vitreoretinopathy. Assessment of genetics based on an next generation sequencing panel should include WNT3A and DKK1.
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Affiliation(s)
| | - Manon Ricquebourg
- Inserm U1132 and Université de ParisParisFrance
- Department of RheumatologyHôpital Lariboisière, AP‐HPParisFrance
| | - Philippe Orcel
- Inserm U1132 and Université de ParisParisFrance
- Department of RheumatologyHôpital Lariboisière, AP‐HPParisFrance
| | - Stéphanie Fabre
- Inserm U1132 and Université de ParisParisFrance
- Department of RheumatologyHôpital Lariboisière, AP‐HPParisFrance
| | - Thomas Funck‐Brentano
- Inserm U1132 and Université de ParisParisFrance
- Department of RheumatologyHôpital Lariboisière, AP‐HPParisFrance
| | - Martine Cohen‐Solal
- Inserm U1132 and Université de ParisParisFrance
- Department of RheumatologyHôpital Lariboisière, AP‐HPParisFrance
| | - Corinne Collet
- Inserm U1132 and Université de ParisParisFrance
- Functional Unit of Molecular BiologyHôpital Lariboisière, AP‐HPParisFrance
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19
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Square TA, Sundaram S, Mackey EJ, Miller CT. Distinct tooth regeneration systems deploy a conserved battery of genes. EvoDevo 2021; 12:4. [PMID: 33766133 PMCID: PMC7995769 DOI: 10.1186/s13227-021-00172-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Accepted: 01/13/2021] [Indexed: 01/01/2023] Open
Abstract
Background Vertebrate teeth exhibit a wide range of regenerative systems. Many species, including most mammals, reptiles, and amphibians, form replacement teeth at a histologically distinct location called the successional dental lamina, while other species do not employ such a system. Notably, a ‘lamina-less’ tooth replacement condition is found in a paraphyletic array of ray-finned fishes, such as stickleback, trout, cod, medaka, and bichir. Furthermore, the position, renewal potential, and latency times appear to vary drastically across different vertebrate tooth regeneration systems. The progenitor cells underlying tooth regeneration thus present highly divergent arrangements and potentials. Given the spectrum of regeneration systems present in vertebrates, it is unclear if morphologically divergent tooth regeneration systems deploy an overlapping battery of genes in their naïve dental tissues. Results In the present work, we aimed to determine whether or not tooth progenitor epithelia could be composed of a conserved cell type between vertebrate dentitions with divergent regeneration systems. To address this question, we compared the pharyngeal tooth regeneration processes in two ray-finned fishes: zebrafish (Danio rerio) and threespine stickleback (Gasterosteus aculeatus). These two teleost species diverged approximately 250 million years ago and demonstrate some stark differences in dental morphology and regeneration. Here, we find that the naïve successional dental lamina in zebrafish expresses a battery of nine genes (bmpr1aa, bmp6, cd34, gli1, igfbp5a, lgr4, lgr6, nfatc1, and pitx2), while active Wnt signaling and Lef1 expression occur during early morphogenesis stages of tooth development. We also find that, despite the absence of a histologically distinct successional dental lamina in stickleback tooth fields, the same battery of nine genes (Bmpr1a, Bmp6, CD34, Gli1, Igfbp5a, Lgr4, Lgr6, Nfatc1, and Pitx2) are expressed in the basalmost endodermal cell layer, which is the region most closely associated with replacement tooth germs. Like zebrafish, stickleback replacement tooth germs additionally express Lef1 and exhibit active Wnt signaling. Thus, two fish systems that either have an organized successional dental lamina (zebrafish) or lack a morphologically distinct successional dental lamina (sticklebacks) deploy similar genetic programs during tooth regeneration. Conclusions We propose that the expression domains described here delineate a highly conserved “successional dental epithelium” (SDE). Furthermore, a set of orthologous genes is known to mark hair follicle epithelial stem cells in mice, suggesting that regenerative systems in other epithelial appendages may utilize a related epithelial progenitor cell type, despite the highly derived nature of the resulting functional organs.![]()
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Affiliation(s)
- Tyler A Square
- Department of Molecular & Cell Biology, University of California, Berkeley, USA.
| | - Shivani Sundaram
- Department of Molecular & Cell Biology, University of California, Berkeley, USA
| | - Emma J Mackey
- Department of Molecular & Cell Biology, University of California, Berkeley, USA
| | - Craig T Miller
- Department of Molecular & Cell Biology, University of California, Berkeley, USA.
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20
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Kanchanasevee C, Sriwattanapong K, Theerapanon T, Thaweesapphithak S, Chetruengchai W, Porntaveetus T, Shotelersuk V. Phenotypic and Genotypic Features of Thai Patients With Nonsyndromic Tooth Agenesis and WNT10A Variants. Front Physiol 2020; 11:573214. [PMID: 33329022 PMCID: PMC7710930 DOI: 10.3389/fphys.2020.573214] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 10/27/2020] [Indexed: 11/18/2022] Open
Abstract
Tooth agenesis is one of the most common orodental anomalies that demonstrate phenotypic and genotypic heterogeneity with a prevalence of 2.5%–7%. Mutations in WNT10A have been proposed to be the most common cause of nonsyndromic tooth agenesis (NSTA). The aim of this study was to characterize the dental features and genetic variants of NSTA in a Thai population. We recruited 13 unrelated patients with NSTA who attended the Faculty of Dentistry, Chulalongkorn University, Thailand, from 2017 to 2019. All 13 underwent whole exome sequencing that identified likely pathogenic genetic variants, all in WNT10A, in five patients. All five patients had second premolar agenesis, while three also had absent or peg-shaped upper lateral incisors. Patient 1 possessed a novel heterozygous duplication, c.916_918dupAAC (p.Asn306dup) in WNT10A. Patients 2 and 3 harbored a heterozygous and homozygous c.637G > A (p.Gly213Ser) in WNT10A, respectively. Patients 4 possessed a heterozygous c.511C > T (p.Arg171Cys) in WNT10A. Patient 5 harbored a homozygous c.511C > T (p.Arg171Cys) in WNT10A and a novel heterozygous c.413A > T (p.Asn138Ile) in EDARADD, suggesting digenic inheritance. We recruited another 18 family members of these five patients. Out of 23 participants, homozygous WNT10A variants were identified in 2 patients and heterozygous variants in 17 individuals. Both homozygous patients had NSTA. Eight out of 17 heterozygous individuals (8/17) had NSTA or a peg-shaped lateral incisor, indicating a 47% penetrance of the heterozygous variants or 53% (10/19) penetrance of either homozygous or heterozygous variants in WNT10A. The frequencies of the c.511C > T in our in-house 1,876 Thai exome database, Asian populations, and non-Asian populations were 0.016, 0.005–0.033, and 0.001, respectively; while those of the c.637G > A were 0.016, 0.004–0.029, and 0.000, respectively. In conclusion, our study reports two novel variants with one each in WNT10A and EDARADD, expanding the genotypic spectra of NSTA. Second premolar agenesis is a common phenotype in affected individuals with variants in WNT10A; however, its penetrance is incomplete. Lastly, the different frequencies of WNT10A variants, c.511C > T and c.637G > A, in diverse populations might contribute to the prevalence range of NSTA between continents.
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Affiliation(s)
- Charinya Kanchanasevee
- Geriatric Dentistry and Special Patients Care International Program, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
| | - Kanokwan Sriwattanapong
- Genomics and Precision Dentistry Research Unit, Department of Physiology, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
| | - Thanakorn Theerapanon
- Genomics and Precision Dentistry Research Unit, Department of Physiology, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
| | - Sermporn Thaweesapphithak
- Center of Excellence for Regenerative Dentistry, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
| | - Wanna Chetruengchai
- Center of Excellence for Medical Genomics, Medical Genomics Cluster, Department of Pediatrics, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.,Excellence Center for Genomics and Precision Medicine, King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand
| | - Thantrira Porntaveetus
- Genomics and Precision Dentistry Research Unit, Department of Physiology, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
| | - Vorasuk Shotelersuk
- Center of Excellence for Medical Genomics, Medical Genomics Cluster, Department of Pediatrics, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.,Excellence Center for Genomics and Precision Medicine, King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand
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21
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Characterisation of a second gain of function EDAR variant, encoding EDAR380R, in East Asia. Eur J Hum Genet 2020; 28:1694-1702. [PMID: 32499598 DOI: 10.1038/s41431-020-0660-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 04/07/2020] [Accepted: 05/12/2020] [Indexed: 11/08/2022] Open
Abstract
Ectodysplasin A1 receptor (EDAR) is a TNF receptor family member with roles in the development and growth of hair, teeth and glands. A derived allele of EDAR, single-nucleotide variant rs3827760, encodes EDAR:p.(Val370Ala), a receptor with more potent signalling effects than the ancestral EDAR370Val. This allele of rs3827760 is at very high frequency in modern East Asian and Native American populations as a result of ancient positive selection and has been associated with straighter, thicker hair fibres, alteration of tooth and ear shape, reduced chin protrusion and increased fingertip sweat gland density. Here we report the characterisation of another SNV in EDAR, rs146567337, encoding EDAR:p.(Ser380Arg). The derived allele of this SNV is at its highest global frequency, of up to 5%, in populations of southern China, Vietnam, the Philippines, Malaysia and Indonesia. Using haplotype analyses, we find that the rs3827760 and rs146567337 SNVs arose on distinct haplotypes and that rs146567337 does not show the same signs of positive selection as rs3827760. From functional studies in cultured cells, we find that EDAR:p.(Ser380Arg) displays increased EDAR signalling output, at a similar level to that of EDAR:p.(Val370Ala). The existence of a second SNV with partly overlapping geographic distribution, the same in vitro functional effect and similar evolutionary age as the derived allele of rs3827760, but of independent origin and not exhibiting the same signs of strong selection, suggests a northern focus of positive selection on EDAR function in East Asia.
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22
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Lévy J, Capri Y, Rachid M, Dupont C, Vermeesch JR, Devriendt K, Verloes A, Tabet AC, Bailleul-Forestier I. LEF1 haploinsufficiency causes ectodermal dysplasia. Clin Genet 2020; 97:595-600. [PMID: 32022899 DOI: 10.1111/cge.13714] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 01/28/2020] [Accepted: 01/30/2020] [Indexed: 11/30/2022]
Abstract
Ectodermal dysplasias are a family of genodermatoses commonly associated with variants in the ectodysplasin/NF-κB or the Wnt/β-catenin pathways. Both pathways are involved in signal transduction from ectoderm to mesenchyme during the development of ectoderm-derived structures. Wnt/β-catenin pathway requires the lymphoid enhancer-binding factor 1 (LEF1), a nuclear mediator, to activate target gene expression. In mice, targeted inactivation of the LEF1 gene results in a complete block of development of multiple ectodermal appendages. We report two unrelated patients with 4q25 de novo deletion encompassing LEF1, associated with severe oligodontia of primary and permanent dentition, hypotrichosis and hypohidrosis compatible with hypohidrotic ectodermal dysplasia. Taurodontism and a particular alveolar bone defect were also observed in both patients. So far, no pathogenic variants or variations involving the LEF1 gene have been reported in human. We provide further evidence for LEF1 haploinsufficiency role in ectodermal dysplasia and delineate its clinical phenotype.
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Affiliation(s)
- Jonathan Lévy
- Genetics Department, AP-HP, Robert-Debré University Hospital, Paris, France
| | - Yline Capri
- Genetics Department, AP-HP, Robert-Debré University Hospital, Paris, France
| | - Myriam Rachid
- Genetics Department, AP-HP, Robert-Debré University Hospital, Paris, France
| | - Céline Dupont
- Genetics Department, AP-HP, Robert-Debré University Hospital, Paris, France
| | - Joris R Vermeesch
- Department of Human Genetics, KU Leuven, Leuven, Belgium.,Center of Human Genetics, University Hospitals Leuven, Leuven, Belgium
| | - Koen Devriendt
- Department of Human Genetics, KU Leuven, Leuven, Belgium.,Center of Human Genetics, University Hospitals Leuven, Leuven, Belgium
| | - Alain Verloes
- Genetics Department, AP-HP, Robert-Debré University Hospital, Paris, France
| | - Anne-Claude Tabet
- Genetics Department, AP-HP, Robert-Debré University Hospital, Paris, France.,Neuroscience Department, Génétique Humaine et Fonction Cognitive Unit, Pasteur Institute, Paris, France
| | - Isabelle Bailleul-Forestier
- Department of Paediatric Dentistry, Rare Oral and Dental Competence Center, CHU Toulouse, Paul Sabatier University, Toulouse, France
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23
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Yu M, Liu Y, Wang Y, Wong SW, Wu J, Liu H, Feng H, Han D. Epithelial Wnt10a Is Essential for Tooth Root Furcation Morphogenesis. J Dent Res 2020; 99:311-319. [PMID: 31914354 DOI: 10.1177/0022034519897607] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
WNT10A (Wingless-type MMTV integration site family, member 10A) plays a crucial role in tooth development, and patients with biallelic WNT10A mutation and mice lacking Wnt10a show taurodontism. However, whether epithelial or mesenchymal WNT10A controls the initiation of the root furcation formation remains unclear, and the functional significance of WNT10A in regulating root morphogenesis has not been clarified. Here, we investigated how Wnt10a affects tooth root development by generating different tissue-specific Wnt10a conditional knockout mice. Wnt10a knockout in the whole tissue (EIIa-Cre;Wnt10aflox/flox) and in dental epithelium (K14-Cre;Wnt10aflox/flox) led to an absence of or apically located root furcation in molars of mice, a phenotype that resembled taurodontism. An RNAscope analysis showed that the dynamic epithelial and mesenchymal Wnt10a expression pattern occurred during root development. Immunofluorescent staining of E-cadherin and EdU revealed decreased epithelial cell proliferation at the cervical region of the molar in K14-Cre;Wnt10aflox/flox mice at postnatal day 0 (PN0), just before the initiation of root morphogenesis. Interestingly, we found increased pulpal mesenchymal cell proliferation in the presumptive root furcating region of the molar in K14-Cre;Wnt10aflox/flox mice at PN4 and PN7. RNA-seq indicated that among the Wnt ligands with high endogenous expression levels in molars, Wnt4 was increased after epithelial knockout of Wnt10a. The RNAscope assay confirmed that the expression of Wnt4 and Axin2 in the dental papilla of the presumptive root furcating region, where dental pulp overgrowth occurred, was increased in K14-Cre;Wnt10aflox/flox molars. Furthermore, after suppression of the elevated Wnt4 level in K14-Cre;Wnt10aflox/flox molars by Wnt4 shRNA adenovirus and kidney capsule grafts, the root furcation defect was partially rescued. Taken together, our study provides the first in vivo evidence that epithelial Wnt10a guides root furcation formation and plays a crucial role in controlling the organized proliferation of adjacent mesenchymal cells by regulating proper Wnt4 expression during root furcation morphogenesis.
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Affiliation(s)
- M Yu
- Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Y Liu
- Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Y Wang
- Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - S W Wong
- Division of Comprehensive Oral Care-Periodontology, Adams School of Dentistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - J Wu
- Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - H Liu
- Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - H Feng
- Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - D Han
- Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing, China
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24
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Abstract
Directly assessing the pathogenicity of variant combinations in multiple genes was until now difficult. Nonetheless, this type of assessment can provide important benefits in identifying the genetic causes of rare diseases. The work presented in this paper aims to resolve this problem by presenting a machine-learning method able to predict the pathogenicity of variant combinations in gene pairs, based on pathogenic data. We demonstrate the high accuracy of this method and its effective capacity to identify novel instances. The method’s decision-making process is also made explicit, a contribution that is useful for clinical interpretation. This pioneering work will lead to toolboxes for geneticists and clinicians that can aid them in counselling their patients more effectively. Notwithstanding important advances in the context of single-variant pathogenicity identification, novel breakthroughs in discerning the origins of many rare diseases require methods able to identify more complex genetic models. We present here the Variant Combinations Pathogenicity Predictor (VarCoPP), a machine-learning approach that identifies pathogenic variant combinations in gene pairs (called digenic or bilocus variant combinations). We show that the results produced by this method are highly accurate and precise, an efficacy that is endorsed when validating the method on recently published independent disease-causing data. Confidence labels of 95% and 99% are identified, representing the probability of a bilocus combination being a true pathogenic result, providing geneticists with rational markers to evaluate the most relevant pathogenic combinations and limit the search space and time. Finally, the VarCoPP has been designed to act as an interpretable method that can provide explanations on why a bilocus combination is predicted as pathogenic and which biological information is important for that prediction. This work provides an important step toward the genetic understanding of rare diseases, paving the way to clinical knowledge and improved patient care.
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25
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Park H, Song JS, Shin TJ, Hyun HK, Kim YJ, Kim JW. WNT10A mutations causing oligodontia. Arch Oral Biol 2019; 103:8-11. [PMID: 31103801 DOI: 10.1016/j.archoralbio.2019.05.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 05/07/2019] [Accepted: 05/08/2019] [Indexed: 11/19/2022]
Abstract
OBJECTIVES To identify the molecular genetic etiology of the families with non-syndromic multiple missing permanent teeth (oligodontia). MATERIALS AND METHODS Genomic DNA was isolated and measured, and whole-exome sequencing was performed. The obtained sequencing reads were aligned to the human reference genome and subsequently processed by a series of bioinformatics programs. Finally, short insertions/deletions and single nucleotide variations were annotated with dbSNP build 138. RESULTS The proband of family 1 was missing 14 permanent teeth, and the mutational analysis revealed compound heterozygousWNT10A mutations (c.364A > T and c.511C > T). Two affected individuals in family 2 were missing 20 and 12 permanent teeth, respectively, and compound heterozygous WNT10A mutations (c.364A > T and c.637G > A) were also identified. CONCLUSIONS This study reveals compound heterozygousWNT10A missense mutations in two families with non-syndromic oligodontia which will improve the understanding of odontogenesis and the pathogenesis related to WNT10A mutations.
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Affiliation(s)
- Haemin Park
- Department of Pediatric Dentistry & Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of Korea
| | - Ji-Soo Song
- Department of Pediatric Dentistry & Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of Korea
| | - Teo Jeon Shin
- Department of Pediatric Dentistry & Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of Korea
| | - Hong-Keun Hyun
- Department of Pediatric Dentistry & Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of Korea
| | - Young-Jae Kim
- Department of Pediatric Dentistry & Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of Korea
| | - Jung-Wook Kim
- Department of Pediatric Dentistry & Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of Korea; Department of Molecular Genetics & Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of Korea.
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26
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Yu M, Liu Y, Liu H, Wong SW, He H, Zhang X, Wang Y, Han D, Feng H. Distinct impacts of bi-allelic WNT10A
mutations on the permanent and primary dentitions in odonto-onycho-dermal dysplasia. Am J Med Genet A 2018; 179:57-64. [DOI: 10.1002/ajmg.a.60682] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 08/07/2018] [Accepted: 10/11/2018] [Indexed: 11/08/2022]
Affiliation(s)
- Miao Yu
- Department of Prosthodontics; Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology; Beijing PR China
| | - Yang Liu
- Department of Prosthodontics; Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology; Beijing PR China
| | - Haochen Liu
- Department of Prosthodontics; Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology; Beijing PR China
| | - Sing-Wai Wong
- Department of Periodontology; School of Dentistry, University of North Carolina at Chapel Hill; Chapel Hill North Carolina
| | - Huiying He
- Department of Prosthodontics; Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology; Beijing PR China
| | - Xiaoxia Zhang
- Department of Prosthodontics; Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology; Beijing PR China
| | - Yue Wang
- Department of Prosthodontics; Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology; Beijing PR China
| | - Dong Han
- Department of Prosthodontics; Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology; Beijing PR China
| | - Hailan Feng
- Department of Prosthodontics; Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology; Beijing PR China
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27
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Grejtakova D, Gabrikova-Dojcakova D, Boronova I, Kyjovska L, Hubcejova J, Fecenkova M, Zigova M, Priganc M, Bernasovska J. WNT10A variants in relation to nonsyndromic hypodontia in eastern Slovak population. J Genet 2018; 97:1169-1177. [PMID: 30555066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Nonsyndromic hypodontia is a congenital absence of less than six permanent teeth, with a most common subtype maxillary lateral incisor agenesis (MLIA). Mutations in several genes have been described in severe tooth agenesis. The aim of this study was to search for the variants in wingless-type MMTV-integration site family member (WNT10A), paired box 9 (PAX9) and axis inhibitor 2 (AXIN2) genes, and investigate their potential role in the pathogenesis of non-syndromic hypodontia. Clinical examination and panoramic radiograph were performed in the cohort of 60 unrelated Slovak patients of Caucasian origin with nonsyndromic hypodontia including 37 MLIA cases and 48 healthy controls. Genomic DNA was isolated from buccal swabs and Sanger sequencing of WNT10A, PAX9 and AXIN2 was performed. Altogether, we identified 23 single-nucleotide variants, of which five were novel. We have found three rare nonsynonymous variants in WNT10A (p.Gly165Arg; p.Gly213Ser and p.Phe228Ile) in eight (13.33%) of 60 patients. Analysis showed potentially damaged WNT10A variant p.Phe228Ile predominantly occurred only in MLIA patients, and with a dominant form of tooth agenesis (odds ratio (ORdom) = 9.841; P = 0.045; 95% confidence interval (CI) 0.492-196.701;ORrec = 0.773; P = 1.000; 95% CI 0.015-39.877). In addition, the WNT10A variant p.Phe228Ile showed a trend associated with familial nonsyndromic hypodontia (P = 0.024; OR= 1.20; 95% CI 0.97-1.48). After Bonferroni correction, these effects remained with borderline tendencies. Using a 3D WNT10A protein model, we demonstrated that the variant Phe228Ile changes the proteinsecondary structure. In PAX9 and AXIN2, common variants were detected. Our findings suggest that the identified WNT10A variant p.Phe228Ile could represent risk for the inherited nonsyndromic hypodontia underlying MLIA. However, further study in different populations is required.
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Affiliation(s)
- D Grejtakova
- Department of Biology, Faculty of Humanities and Natural Sciences, University of Presov, Presov, Slovakia.
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Grejtakova D, Gabrikova-Dojcakova D, Boronova I, Kyjovska L, Hubcejova J, Fecenkova M, Zigova M, Priganc M, Bernasovska J. WNT10A variants in relation to nonsyndromic hypodontia in eastern Slovak population. J Genet 2018. [DOI: 10.1007/s12041-018-1011-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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29
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Yu M, Wong SW, Han D, Cai T. Genetic analysis: Wnt and other pathways in nonsyndromic tooth agenesis. Oral Dis 2018; 25:646-651. [PMID: 29969831 DOI: 10.1111/odi.12931] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Revised: 06/26/2018] [Accepted: 06/27/2018] [Indexed: 12/29/2022]
Abstract
Tooth agenesis (TA) is one of the most common developmental anomalies that affects the number of teeth. An extensive analysis of publicly accessible databases revealed 15 causative genes responsible for nonsyndromic TA, along with their signaling pathways in Wnt/β-catenin, TGF-β/BMP, and Eda/Edar/NF-κB. However, genotype-phenotype correlation analysis showed that most of the causal genes are also responsible for syndromic TA or other conditions. In a total of 198 different mutations of the 15 genes responsible for nonsyndromic TA, 182 mutations (91.9%) are derived from seven genes (AXIN2, EDA, LRP6, MSX1, PAX9, WNT10A, and WNT10B) compared with the remaining 16 mutations (8.1%) identified in the remaining eight genes (BMP4, DKK1, EDAR, EDARADD, GREM2, KREMEN1, LTBP3, and SMOC2). Furthermore, specificity analysis in terms of the ratio of nonsyndromic TA mutations versus syndromic mutations in each of the aforementioned seven genes showed a 98.2% specificity rate in PAX9, 58.9% in WNT10A, 56.6% in MSX1, 41.2% in WNT10B, 31.4% in LRP6, 23.8% in AXIN2%, and 8.4% in EDA. These findings underscore an important role of the Wnt and Wnt-associated pathways in the genetic etiology of this heterozygous disease and shed new lights on the discovery of novel molecular mechanisms associated with tooth agenesis.
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Affiliation(s)
- Miao Yu
- Department of Prosthodontics, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, Beijing, China
| | - Sing-Wai Wong
- Oral and Craniofacial Biomedicine Curriculum, School of Dentistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.,Immunity, Inflammation, and Disease Laboratory, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina
| | - Dong Han
- Department of Prosthodontics, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, Beijing, China
| | - Tao Cai
- National Institute of Dental and Craniofacial Research, NIH, Bethesda, Maryland
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30
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Williams MA, Letra A. The Changing Landscape in the Genetic Etiology of Human Tooth Agenesis. Genes (Basel) 2018; 9:genes9050255. [PMID: 29772684 PMCID: PMC5977195 DOI: 10.3390/genes9050255] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 05/01/2018] [Accepted: 05/09/2018] [Indexed: 02/08/2023] Open
Abstract
Despite much progress in understanding the genetics of syndromic tooth agenesis (TA), the causes of the most common, isolated TA remain elusive. Recent studies have identified novel genes and variants contributing to the etiology of TA, and revealed new pathways in which tooth development genes belong. Further, the use of new research approaches including next-generation sequencing has provided increased evidence supporting an oligogenic inheritance model for TA, and may explain the phenotypic variability of the condition. In this review, we present current knowledge about the genetic mechanisms underlying syndromic and isolated TA in humans, and highlight the value of incorporating next-generation sequencing approaches to identify causative and/or modifier genes that contribute to the etiology of TA.
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Affiliation(s)
- Meredith A Williams
- University of Texas Health Science Center at Houston School of Dentistry, Houston, TX 77054, USA.
| | - Ariadne Letra
- Department of Diagnostic and Biomedical Sciences, University of Texas Health Science Center at Houston School of Dentistry, Houston, TX 77054, USA.
- Center for Craniofacial Research, University of Texas Health Science Center at Houston School of Dentistry, Houston, TX 77054, USA.
- Pediatric Research Center, University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX 77030, USA.
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31
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Ellis–van Creveld syndrome and profound deafness resulted by sequence variants in the EVC / EVC2 and TMC1 genes. J Genet 2017; 96:1005-1014. [DOI: 10.1007/s12041-017-0868-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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32
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Zeng B, Zhao Q, Li S, Lu H, Lu J, Ma L, Zhao W, Yu D. Novel EDA or EDAR Mutations Identified in Patients with X-Linked Hypohidrotic Ectodermal Dysplasia or Non-Syndromic Tooth Agenesis. Genes (Basel) 2017; 8:genes8100259. [PMID: 28981473 PMCID: PMC5664109 DOI: 10.3390/genes8100259] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Revised: 09/21/2017] [Accepted: 09/29/2017] [Indexed: 01/02/2023] Open
Abstract
Both X-linked hypohidrotic ectodermal dysplasia (XLHED) and non-syndromic tooth agenesis (NSTA) result in symptoms of congenital tooth loss. This study investigated genetic causes in two families with XLHED and four families with NSTA. We screened for mutations of WNT10A, EDA, EDAR, EDARADD, PAX9, MSX1, AXIN2, LRP6, and WNT10B through Sanger sequencing. Whole exome sequencing was performed for the proband of NSTA Family 4. Novel mutation c.1051G>T (p.Val351Phe) and the known mutation c.467G>A (p.Arg156His) of Ectodysplasin A (EDA) were identified in families with XLHED. Novel EDA receptor (EDAR) mutation c.73C>T (p.Arg25*), known EDA mutation c.491A>C (p.Glu164Ala), and known Wnt family member 10A (WNT10A) mutations c.511C>T (p.Arg171Cys) and c.742C>T (p.Arg248*) were identified in families with NSTA. The novel EDA and EDAR mutations were predicted as being pathogenic through bioinformatics analyses and structural modeling. Two variants of WNT10A, c.374G>A (p.Arg125Lys) and c.125A>G (p.Asn42Ser), were found in patients with NSTA. The two WNT10A variants were predicted to affect the splicing of message RNA, but minigene experiments showed normal splicing of mutated minigenes. This study uncovered the genetic foundations with respect to six families with XLHED or NSTA. We identified six mutations, of which two were novel mutations of EDA and EDAR. This is the first report of a nonsense EDAR mutation leading to NSTA.
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Affiliation(s)
- Binghui Zeng
- Guanghua School of Stomatology, Hospital of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou 510055, China.
| | - Qi Zhao
- Department of Oncology, Xianning Central Hospital, The First Affiliated Hospital of Hubei University of Science and Technology, Xianning 437100, China.
| | - Sijie Li
- Guanghua School of Stomatology, Hospital of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou 510055, China.
| | - Hui Lu
- Guanghua School of Stomatology, Hospital of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou 510055, China.
| | - Jiaxuan Lu
- Guanghua School of Stomatology, Hospital of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou 510055, China.
| | - Lan Ma
- Guanghua School of Stomatology, Hospital of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou 510055, China.
| | - Wei Zhao
- Guanghua School of Stomatology, Hospital of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou 510055, China.
| | - Dongsheng Yu
- Guanghua School of Stomatology, Hospital of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou 510055, China.
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33
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Sfeir E, Aboujaoude S. Impacted Lower Second Permanent Molars at the Ramus and Coronoid Process: A New Clinical Symptom of the WNT10A Mutation in Ectodermal Dysplasia. Int J Clin Pediatr Dent 2017; 10:363-368. [PMID: 29403230 PMCID: PMC5789140 DOI: 10.5005/jp-journals-10005-1466] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Accepted: 10/19/2017] [Indexed: 11/23/2022] Open
Abstract
AIM Hidrotic ectodermal dysplasia (ED) with the WNT10A mutation produces variable dentofacial symptoms. The aim of this study was to describe a new clinical symptom, i.e., specific to the WNT10A mutation in hidrotic ED. The study investigated the migratory trend of the lower second permanent molars to the ramus or coronoid process. To the best of authors' knowledge, no data in the literature describe this trend in cases of hidrotic ED. MATERIALS AND METHODS A three-generation family pedigree was established for seven families after the diagnosis of hidrotic ED in a 10-year-old boy. Thereafter, a genetic and clinical study was conducted on three families with at least one individual affected by hidrotic ED (20 individuals). We selected the children with molar germs 37 and 47. The eruption axes of these germs were then traced on the panoramic images at the initial time (T0) and 1 year later (T0 + 1 year), and the deviations between these axes were measured. RESULTS A significant familial consanguinity was shown. Eight subjects presented with the hidrotic ED phenotype. Among them, three individuals carried germs 37 and 47. Over time, the measured deviations between the eruption axes of the latter displayed, in the majority of the cases, a distal inclination toward the ramus. LIMITATIONS A larger sample size is mandatory to assess the frequencies and treatment modalities. CONCLUSION The presence of germs in the lower second permanent molars in patients with hidrotic ED is an important clinical symptom that should be monitored to detect and prevent ectopic migration of these teeth. CLINICAL SIGNIFICANCE In hidrotic ED cases, the study of the presence of the second lower permanent germs must include clinical and radiological examinations. Establishing an inter-ceptive treatment is necessary to prevent the migration of the molars in question.How to cite this article: Sfeir E, Aboujaoude S. Impacted Lower Second Permanent Molars at the Ramus and Coronoid Process: A New Clinical Symptom of the WNT10A Mutation in Ectodermal Dysplasia. Int J Clin Pediatr Dent 2017;10(4):363-368.
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Affiliation(s)
- Elia Sfeir
- Professor, Department of Pediatric Dentistry, School of Dentistry Lebanese University, Beirut, Lebanon
| | - Samia Aboujaoude
- Associate Professor, Department of Pediatric Dentistry, School of Dentistry Lebanese University, Beirut, Lebanon
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Duan H, Zhang D, Cheng J, Lu Y, Yuan H. Gene screening facilitates diagnosis of complicated symptoms: A case report. Mol Med Rep 2017; 16:7915-7922. [PMID: 28944914 PMCID: PMC5779872 DOI: 10.3892/mmr.2017.7590] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Accepted: 05/02/2017] [Indexed: 01/22/2023] Open
Abstract
Gene mutation has an important role in disease pathogenesis; therefore, genetic screening is a useful tool for diagnosis. The present study screened pathogenic genes, ectodysplasin A (EDA) and lamin A/C (LMNA), in a patient with suspected syndromic hearing impairment and various other symptoms including tooth and skin abnormalities. Large-scale sequencing of 438 deafness-associated genes and whole-genome sequencing was also performed. The present findings did not identify copy number variation and mutations in EDA; therefore, excluding the possibility of EDA-initiated ectodermal dysplasia syndrome. A synonymous mutation in LMNA, possibly due to a splicing abnormality, did not elucidate the pathogenesis of Hutchinson-Gilford progeria syndrome. Whole-genome sequencing revealed copy number variations or mutations in various candidate genes which may elucidate part of the symptoms observed. The copy number variations and mutations were also used to identify single nucleotide variations (SNVs) in crystallin mu (CRYM), RAB3 GTPase activating protein catalytic subunit 1 (RAB3GAP1) and Wnt family member 10A (WNT10A), implicated in deafness, hypogonadism and tooth/skin abnormalities, respectively. The importance of an existing SNV in CRYM and a novel SNV in RAB3GAP1 in pathogenesis remains to be further elucidated. The WNT10A p.G213S mutation was confirmed to be the etiological cause of tooth agenesis and ectodermal dysplasia as previously described. It was concluded that a mutation in WNT10A may be the reason for some of the symptoms observed in the patient; however, other genes may also be involved for other symptoms. The findings of the present study provide putative gene mutations that require further investigation in order to determine their roles in pathogenesis.
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Affiliation(s)
- Hong Duan
- Department of Surgery, Institute of Otolaryngology, Chinese PLA General Hospital, Beijing 100853, P.R. China
| | - Di Zhang
- Department of Surgery, Institute of Otolaryngology, Chinese PLA General Hospital, Beijing 100853, P.R. China
| | - Jing Cheng
- Department of Surgery, Institute of Otolaryngology, Chinese PLA General Hospital, Beijing 100853, P.R. China
| | - Yu Lu
- Department of Surgery, Institute of Otolaryngology, Chinese PLA General Hospital, Beijing 100853, P.R. China
| | - Huijun Yuan
- Department of Surgery, Institute of Otolaryngology, Chinese PLA General Hospital, Beijing 100853, P.R. China
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35
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Wong SW, Han D, Zhang H, Liu Y, Zhang X, Miao MZ, Wang Y, Zhao N, Zeng L, Bai B, Wang YX, Liu H, Frazier-Bowers SA, Feng H. Nine Novel PAX9 Mutations and a Distinct Tooth Agenesis Genotype-Phenotype. J Dent Res 2017; 97:155-162. [PMID: 28910570 DOI: 10.1177/0022034517729322] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Tooth agenesis is one of the most common developmental anomalies affecting function and esthetics. The paired-domain transcription factor, Pax9, is critical for patterning and morphogenesis of tooth and taste buds. Mutations of PAX9 have been identified in patients with tooth agenesis. Despite significant progress in the genetics of tooth agenesis, many gaps in knowledge exist in refining the genotype-phenotype correlation between PAX9 and tooth agenesis. In the present study, we complete genetic and phenotypic characterization of multiplex Chinese families with nonsyndromic (NS) tooth agenesis. Direct sequencing of polymerase chain reaction products revealed 9 novel (c.140G>C, c.167T>A, c.332G>C, c.194C>A, c.271A>T, c.146delC, c.185_189dup, c.256_262dup, and c.592delG) and 2 known heterozygous mutations in the PAX9 gene among 120 probands. Subsequently, pedigrees were extended, and we confirmed that the mutations co-segregated with the tooth agenesis phenotype (with exception of families in which DNA analysis was not available). In 1 family ( n = 6), 2 individuals harbored both the PAX9 c.592delG mutation and a heterozygous missense mutation (c.739C>T) in the MSX1 gene. Clinical characterization of families segregating a PAX9 mutation reveal that all affected individuals were missing the mandibular second molar and their maxillary central incisors are most susceptible to microdontia. A significant reduction of bitter taste perception was documented in individuals harboring PAX9 mutations ( n = 3). Functional studies revealed that PAX9 haploinsufficiency or a loss of function of the PAX9 protein underlies tooth agenesis.
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Affiliation(s)
- S-W Wong
- 1 Department of Prosthodontics, School and Hospital of Stomatology, Peking University, Beijing, China.,2 Oral and Craniofacial Biomedicine Curriculum, School of Dentistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.,3 Immunity, Inflammation, and Disease Laboratory, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
| | - D Han
- 1 Department of Prosthodontics, School and Hospital of Stomatology, Peking University, Beijing, China
| | - H Zhang
- 4 Central Laboratory, School and Hospital of Stomatology, Peking University, Beijing, China
| | - Y Liu
- 1 Department of Prosthodontics, School and Hospital of Stomatology, Peking University, Beijing, China
| | - X Zhang
- 1 Department of Prosthodontics, School and Hospital of Stomatology, Peking University, Beijing, China
| | - M Z Miao
- 2 Oral and Craniofacial Biomedicine Curriculum, School of Dentistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Y Wang
- 1 Department of Prosthodontics, School and Hospital of Stomatology, Peking University, Beijing, China
| | - N Zhao
- 1 Department of Prosthodontics, School and Hospital of Stomatology, Peking University, Beijing, China
| | - L Zeng
- 1 Department of Prosthodontics, School and Hospital of Stomatology, Peking University, Beijing, China
| | - B Bai
- 5 Department of Prosthodontics, Beijing Stomatological Hospital and School of Stomatology, Capital Medical University, Beijing, China
| | - Y-X Wang
- 4 Central Laboratory, School and Hospital of Stomatology, Peking University, Beijing, China
| | - H Liu
- 1 Department of Prosthodontics, School and Hospital of Stomatology, Peking University, Beijing, China.,6 National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - S A Frazier-Bowers
- 7 Department of Orthodontics, School of Dentistry, University of North Carolina, Chapel Hill, NC, USA
| | - H Feng
- 1 Department of Prosthodontics, School and Hospital of Stomatology, Peking University, Beijing, China.,6 National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, China
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36
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Dinckan N, Du R, Petty LE, Coban-Akdemir Z, Jhangiani SN, Paine I, Baugh EH, Erdem AP, Kayserili H, Doddapaneni H, Hu J, Muzny DM, Boerwinkle E, Gibbs RA, Lupski JR, Uyguner ZO, Below JE, Letra A. Whole-Exome Sequencing Identifies Novel Variants for Tooth Agenesis. J Dent Res 2017; 97:49-59. [PMID: 28813618 DOI: 10.1177/0022034517724149] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Tooth agenesis is a common craniofacial abnormality in humans and represents failure to develop 1 or more permanent teeth. Tooth agenesis is complex, and variations in about a dozen genes have been reported as contributing to the etiology. Here, we combined whole-exome sequencing, array-based genotyping, and linkage analysis to identify putative pathogenic variants in candidate disease genes for tooth agenesis in 10 multiplex Turkish families. Novel homozygous and heterozygous variants in LRP6, DKK1, LAMA3, and COL17A1 genes, as well as known variants in WNT10A, were identified as likely pathogenic in isolated tooth agenesis. Novel variants in KREMEN1 were identified as likely pathogenic in 2 families with suspected syndromic tooth agenesis. Variants in more than 1 gene were identified segregating with tooth agenesis in 2 families, suggesting oligogenic inheritance. Structural modeling of missense variants suggests deleterious effects to the encoded proteins. Functional analysis of an indel variant (c.3607+3_6del) in LRP6 suggested that the predicted resulting mRNA is subject to nonsense-mediated decay. Our results support a major role for WNT pathways genes in the etiology of tooth agenesis while revealing new candidate genes. Moreover, oligogenic cosegregation was suggestive for complex inheritance and potentially complex gene product interactions during development, contributing to improved understanding of the genetic etiology of familial tooth agenesis.
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Affiliation(s)
- N Dinckan
- 1 Department of Medical Genetics, Istanbul Medical Faculty, Istanbul University, Istanbul, Turkey.,2 Department of Diagnostic and Biomedical Sciences and Center for Craniofacial Research, University of Texas Health Science Center at Houston School of Dentistry, Houston, TX, USA
| | - R Du
- 3 Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - L E Petty
- 4 Human Genetics Center, University of Texas Health Science Center at Houston School of Public Health, Houston, TX, USA
| | - Z Coban-Akdemir
- 3 Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - S N Jhangiani
- 5 Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX, USA
| | - I Paine
- 3 Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - E H Baugh
- 6 Department of Biology, New York University, New York, NY, USA
| | - A P Erdem
- 7 Department of Pedodontics, Faculty of Dentistry, Istanbul University, Capa, Istanbul, Turkey
| | - H Kayserili
- 8 Department of Medical Genetics, Koc University, School of Medicine (KUSOM), Istanbul, Turkey
| | - H Doddapaneni
- 5 Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX, USA
| | - J Hu
- 5 Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX, USA
| | - D M Muzny
- 5 Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX, USA
| | - E Boerwinkle
- 4 Human Genetics Center, University of Texas Health Science Center at Houston School of Public Health, Houston, TX, USA.,5 Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX, USA
| | - R A Gibbs
- 3 Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.,5 Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX, USA
| | - J R Lupski
- 3 Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.,5 Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX, USA.,9 Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA.,10 Texas Children's Hospital, Houston, TX, USA
| | - Z O Uyguner
- 1 Department of Medical Genetics, Istanbul Medical Faculty, Istanbul University, Istanbul, Turkey
| | - J E Below
- 4 Human Genetics Center, University of Texas Health Science Center at Houston School of Public Health, Houston, TX, USA
| | - A Letra
- 2 Department of Diagnostic and Biomedical Sciences and Center for Craniofacial Research, University of Texas Health Science Center at Houston School of Dentistry, Houston, TX, USA.,11 Pediatric Research Center, University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX, USA
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37
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Tardieu C, Jung S, Niederreither K, Prasad M, Hadj-Rabia S, Philip N, Mallet A, Consolino E, Sfeir E, Noueiri B, Chassaing N, Dollfus H, Manière M, Bloch-Zupan A, Clauss F. Dental and extra-oral clinical features in 41 patients with WNT10A
gene mutations: A multicentric genotype-phenotype study. Clin Genet 2017; 92:477-486. [DOI: 10.1111/cge.12972] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 01/11/2017] [Accepted: 01/16/2017] [Indexed: 11/27/2022]
Affiliation(s)
- C. Tardieu
- ADES UMR 7268, Hôpital Timone, Service Odontologie; Aix Marseille University, APHM; Marseille France
| | - S. Jung
- Pôle de Médecine et Chirurgie Bucco-Dentaires, Centre de Référence des Manifestations Odontologiques des Maladies Rares, O Rares; Hôpitaux Universitaires de Strasbourg; Strasbourg France
- Faculté de Chirurgie Dentaire; Université de Strasbourg; Strasbourg France
| | - K. Niederreither
- CNRS UMR7104, INSERM U964; Institut de Génétique et de Biologie Moléculaire and Cellulaire, Centre Européen de Recherche en Biologie et en Médecine, Université de Strasbourg; Illkirch France
| | - M. Prasad
- Medical Genetics Laboratory, INSERM U1112, Translational Medicine federation (FMTS); Alsace Medical Genetics Institute; Strasbourg France
| | - S. Hadj-Rabia
- Reference Center for Genodermatosis; Necker Hospital, AP-HP; Paris France
| | - N. Philip
- INSERM GMGF, UMR-S910; Aix-Marseille University; Marseille France
- Department of Medical Genetics, Reference Center for Developmental Anomalies; APHM, Hôpital Timone; Marseille France
| | - A. Mallet
- Department of Medical Genetics, Reference Center for Developmental Anomalies; APHM, Hôpital Timone; Marseille France
| | - E. Consolino
- Department of Medical Genetics, Reference Center for Developmental Anomalies; APHM, Hôpital Timone; Marseille France
| | - E. Sfeir
- Department of Pediatric Dentistry; Libanese University; Beyrouth Lebanon
| | - B. Noueiri
- Department of Pediatric Dentistry; Libanese University; Beyrouth Lebanon
| | - N. Chassaing
- Department of Medical Genetics; University Hospital; Toulouse France
| | - H. Dollfus
- Medical Genetics Laboratory, INSERM U1112, Translational Medicine federation (FMTS); Alsace Medical Genetics Institute; Strasbourg France
| | - M.C. Manière
- Pôle de Médecine et Chirurgie Bucco-Dentaires, Centre de Référence des Manifestations Odontologiques des Maladies Rares, O Rares; Hôpitaux Universitaires de Strasbourg; Strasbourg France
- Faculté de Chirurgie Dentaire; Université de Strasbourg; Strasbourg France
- INSERM Unit UMR 1109; Osteoarticular and Dental Regenerative Nanomedicine; Strasbourg France
| | - A. Bloch-Zupan
- Pôle de Médecine et Chirurgie Bucco-Dentaires, Centre de Référence des Manifestations Odontologiques des Maladies Rares, O Rares; Hôpitaux Universitaires de Strasbourg; Strasbourg France
- Faculté de Chirurgie Dentaire; Université de Strasbourg; Strasbourg France
- CNRS UMR7104, INSERM U964; Institut de Génétique et de Biologie Moléculaire and Cellulaire, Centre Européen de Recherche en Biologie et en Médecine, Université de Strasbourg; Illkirch France
| | - F. Clauss
- Pôle de Médecine et Chirurgie Bucco-Dentaires, Centre de Référence des Manifestations Odontologiques des Maladies Rares, O Rares; Hôpitaux Universitaires de Strasbourg; Strasbourg France
- Faculté de Chirurgie Dentaire; Université de Strasbourg; Strasbourg France
- CNRS UMR7104, INSERM U964; Institut de Génétique et de Biologie Moléculaire and Cellulaire, Centre Européen de Recherche en Biologie et en Médecine, Université de Strasbourg; Illkirch France
- INSERM Unit UMR 1109; Osteoarticular and Dental Regenerative Nanomedicine; Strasbourg France
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38
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Tooth agenesis and orofacial clefting: genetic brothers in arms? Hum Genet 2016; 135:1299-1327. [PMID: 27699475 PMCID: PMC5065589 DOI: 10.1007/s00439-016-1733-z] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Accepted: 09/21/2016] [Indexed: 12/16/2022]
Abstract
Tooth agenesis and orofacial clefts represent the most common developmental anomalies and their co-occurrence is often reported in patients as well in animal models. The aim of the present systematic review is to thoroughly investigate the current literature (PubMed, EMBASE) to identify the genes and genomic loci contributing to syndromic or non-syndromic co-occurrence of tooth agenesis and orofacial clefts, to gain insight into the molecular mechanisms underlying their dual involvement in the development of teeth and facial primordia. Altogether, 84 articles including phenotype and genotype description provided 9 genomic loci and 26 gene candidates underlying the co-occurrence of the two congenital defects: MSX1, PAX9, IRF6, TP63, KMT2D, KDM6A, SATB2, TBX22, TGFα, TGFβ3, TGFβR1, TGFβR2, FGF8, FGFR1, KISS1R, WNT3, WNT5A, CDH1, CHD7, AXIN2, TWIST1, BCOR, OFD1, PTCH1, PITX2, and PVRL1. The molecular pathways, cellular functions, tissue-specific expression and disease association were investigated using publicly accessible databases (EntrezGene, UniProt, OMIM). The Gene Ontology terms of the biological processes mediated by the candidate genes were used to cluster them using the GOTermMapper (Lewis-Sigler Institute, Princeton University), speculating on six super-clusters: (a) anatomical development, (b) cell division, growth and motility, (c) cell metabolism and catabolism, (d) cell transport, (e) cell structure organization and (f) organ/system-specific processes. This review aims to increase the knowledge on the mechanisms underlying the co-occurrence of tooth agenesis and orofacial clefts, to pave the way for improving targeted (prenatal) molecular diagnosis and finally to reflect on therapeutic or ultimately preventive strategies for these disabling conditions in the future.
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De novo EDA mutations: Variable expression in two Egyptian families. Arch Oral Biol 2016; 68:21-8. [PMID: 27054699 DOI: 10.1016/j.archoralbio.2016.03.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Revised: 03/28/2016] [Accepted: 03/29/2016] [Indexed: 11/21/2022]
Abstract
OBJECTIVE Mutations in the EDA gene, encoding the epithelial morphogen ectodysplasin-A, can result in different but overlapping phenotypes. Therefore the aim of the study was to search for etiological variations of EDA and other candidate genes in two unrelated Egyptian male children with sporadic non-syndromic tooth agenesis (NTA) and hypohidrotic ectodermal dysplasia (HED). DESIGN Direct sequencing of the coding regions including exon-intron boundaries of EDA, MSX1, PAX9, WNT10A and EDAR was performed in probands and their available family members. RESULTS Two etiological mutations were found in the EDA coding region. The patient with NTA in both deciduous and permanent dentition was a carrier of a novel in-frame deletion situated in the short collagenous domain (c.663-680delTCCTCCTGGTCCTCAAGG, p.222-227delPPGPQG). The second mutation, located outside the minimal furin consensus motif (c.463C>T, p.Arg155Cys, rs132630312), was identified in the patient exhibiting all typical features of HED. The identified EDA mutations were not detected in probands' family members as well as in 188 unrelated control individuals. No pathogenic variants were found in the MSX1, PAX9, WNT10A and EDAR genes. CONCLUSION Our results increase the knowledge of the spectrum of EDA mutations and confirm that this gene is an important candidate gene for two developmental diseases sharing the common feature of the congenital lack of teeth. In addition, these results can support the hypothesis that X-linked HED and EDA-related NTA are the same disease with different degrees of severity.
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Li D, Xu R, Huang F, Wang B, Tao Y, Jiang Z, Li H, Yao J, Xu P, Wu X, Ren L, Zhang R, Kelsoe JR, Ma J. A novel missense mutation in collagenous domain of EDA gene in a Chinese family with X-linked hypohidrotic ectodermal dysplasia. J Genet 2016; 94:115-9. [PMID: 25846883 DOI: 10.1007/s12041-015-0474-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Daxu Li
- Stomatology Clinic, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, People's Republic of China.
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Novel missense mutation in the EDA gene in a family affected by oligodontia. J Orofac Orthop 2016; 77:31-8. [PMID: 26753551 DOI: 10.1007/s00056-015-0005-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Accepted: 07/28/2015] [Indexed: 10/22/2022]
Abstract
BACKGROUND Mutations in the EDA-EDAR-EDARADD genes and more recently, mutations in the WNT10A gene have been described as the cause of syndromic and nonsyndromic tooth agenesis concomitant with diverse abnormalities of ectodermally derived tissues. AIM In the present investigation, two brothers presenting severe tooth agenesis (oligodontia) concomitant with subtle signs of ectodermal dysplasia (ED) symptoms, as well as six family relatives were analyzed for a causative mutation. METHODS Genomic DNA was isolated from saliva, and genetic screening performed via direct sequencing of PCR fragments covering the entire coding regions and the intron-exon junctions of the EDA, EDAR, EDARADD as well as the WNT10A genes. Mutation analysis was conducted using the Mutation Surveyor(®) Software. RESULTS AND CONCLUSION We identified a novel G > A mutation located on exon 7 at nucleotide position c.866 in the EDA gene in both patients. The nucleotide change results in a substitution of arginine by histidine (p.Arg289His). According to the programs MutationTaster and PolyPhen2, this mutation is pathogenic. Based on a computerized protein structure analysis, we suggest that the change p.Arg289His in EDA impairs protein stabilization and thus might possibly be involved in the development of oligodontia concomitant with a mild ED phenotype.
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Zeng B, Lu H, Xiao X, Zhou L, Lu J, Zhu L, Yu D, Zhao W. NovelEDAmutation in X-linked hypohidrotic ectodermal dysplasia and genotype-phenotype correlation. Oral Dis 2015; 21:994-1000. [DOI: 10.1111/odi.12376] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2015] [Revised: 08/25/2015] [Accepted: 09/16/2015] [Indexed: 11/28/2022]
Affiliation(s)
- B Zeng
- Guanghua School of Stomatology; Guangdong Provincial Key Laboratory of Stomatology; Sun Yat-sen University; Guangzhou China
- Department of Medical Genetics; Zhongshan School of Medicine and Center for Genome Research; Sun Yat-sen University; Guangzhou China
| | - H Lu
- Guanghua School of Stomatology; Guangdong Provincial Key Laboratory of Stomatology; Sun Yat-sen University; Guangzhou China
| | - X Xiao
- Guanghua School of Stomatology; Guangdong Provincial Key Laboratory of Stomatology; Sun Yat-sen University; Guangzhou China
| | - L Zhou
- Guanghua School of Stomatology; Guangdong Provincial Key Laboratory of Stomatology; Sun Yat-sen University; Guangzhou China
| | - J Lu
- Guanghua School of Stomatology; Guangdong Provincial Key Laboratory of Stomatology; Sun Yat-sen University; Guangzhou China
| | - L Zhu
- Guanghua School of Stomatology; Guangdong Provincial Key Laboratory of Stomatology; Sun Yat-sen University; Guangzhou China
| | - D Yu
- Guanghua School of Stomatology; Guangdong Provincial Key Laboratory of Stomatology; Sun Yat-sen University; Guangzhou China
| | - W Zhao
- Guanghua School of Stomatology; Guangdong Provincial Key Laboratory of Stomatology; Sun Yat-sen University; Guangzhou China
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Molecular basis of hypohidrotic ectodermal dysplasia: an update. J Appl Genet 2015; 57:51-61. [PMID: 26294279 PMCID: PMC4731439 DOI: 10.1007/s13353-015-0307-4] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Revised: 07/15/2015] [Accepted: 07/19/2015] [Indexed: 01/16/2023]
Abstract
Recent advances in understanding the molecular events underlying hypohidrotic ectodermal dysplasia (HED) caused by mutations of the genes encoding proteins of the tumor necrosis factor α (TNFα)-related signaling pathway have been presented. These proteins are involved in signal transduction from ectoderm to mesenchyme during development of the fetus and are indispensable for the differentiation of ectoderm-derived structures such as eccrine sweat glands, teeth, hair, skin, and/or nails. Novel data were reviewed and discussed on the structure and functions of the components of TNFα-related signaling pathway, the consequences of mutations of the genes encoding these proteins, and the prospect for further investigations, which might elucidate the origin of HED.
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Kimura R, Watanabe C, Kawaguchi A, Kim YI, Park SB, Maki K, Ishida H, Yamaguchi T. Common polymorphisms in WNT10A affect tooth morphology as well as hair shape. Hum Mol Genet 2015; 24:2673-80. [DOI: 10.1093/hmg/ddv014] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Accepted: 01/16/2015] [Indexed: 11/14/2022] Open
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Yang J, Wang SK, Choi M, Reid BM, Hu Y, Lee YL, Herzog CR, Kim-Berman H, Lee M, Benke PJ, Kent Lloyd KC, Simmer JP, Hu JCC. Taurodontism, variations in tooth number, and misshapened crowns in Wnt10a null mice and human kindreds. Mol Genet Genomic Med 2015; 3:40-58. [PMID: 25629078 PMCID: PMC4299714 DOI: 10.1002/mgg3.111] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Revised: 07/30/2014] [Accepted: 07/31/2014] [Indexed: 01/22/2023] Open
Abstract
WNT10A is a signaling molecule involved in tooth development, and WNT10A defects are associated with tooth agenesis. We characterized Wnt10a null mice generated by the knockout mouse project (KOMP) and six families with WNT10A mutations, including a novel p.Arg104Cys defect, in the absence of EDA,EDAR, or EDARADD variations. Wnt10a null mice exhibited supernumerary mandibular fourth molars, and smaller molars with abnormal cusp patterning and root taurodontism. Wnt10a (-/-) incisors showed distinctive apical-lingual wedge-shaped defects. These findings spurred us to closely examine the dental phenotypes of our WNT10A families. WNT10A heterozygotes exhibited molar root taurodontism and mild tooth agenesis (with incomplete penetrance) in their permanent dentitions. Individuals with two defective WNT10A alleles showed severe tooth agenesis and had fewer cusps on their molars. The misshapened molar crowns and roots were consistent with the Wnt10a null phenotype and were not previously associated with WNT10A defects. The missing teeth contrasted with the presence of supplemental teeth in the Wnt10a null mice and demonstrated mammalian species differences in the roles of Wnt signaling in early tooth development. We conclude that molar crown and root dysmorphologies are caused by WNT10A defects and that the severity of the tooth agenesis correlates with the number of defective WNT10A alleles.
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Affiliation(s)
- Jie Yang
- Department of Pediatric Dentistry, School and Hospital of Stomatology, Peking University22 South Avenue Zhongguancun Haidian District, Beijing, 100081, China
- Department of Biologic and Materials Sciences, University of Michigan School of Dentistry1210 Eisenhower Place, Ann Arbor, Michigan, 48108
| | - Shih-Kai Wang
- Department of Biologic and Materials Sciences, University of Michigan School of Dentistry1210 Eisenhower Place, Ann Arbor, Michigan, 48108
| | - Murim Choi
- Department of Biomedical Sciences, College of Medicine, Seoul National University275-1 Yongon-dong, Chongno-gu, Seoul, 110-768, Korea
- Department of Genetics, Howard Hughes Medical Institute, Yale University School of Medicine333 Cedar Street, New Haven, Connecticut, 06520
| | - Bryan M Reid
- Department of Biologic and Materials Sciences, University of Michigan School of Dentistry1210 Eisenhower Place, Ann Arbor, Michigan, 48108
| | - Yuanyuan Hu
- Department of Biologic and Materials Sciences, University of Michigan School of Dentistry1210 Eisenhower Place, Ann Arbor, Michigan, 48108
| | - Yuan-Ling Lee
- Graduate Institute of Clinical Dentistry, National Taiwan UniversityNo. 1 Chang-Te Street, Taipei, 10048, Taiwan, China
| | - Curtis R Herzog
- Department of Biologic and Materials Sciences, University of Michigan School of Dentistry1210 Eisenhower Place, Ann Arbor, Michigan, 48108
| | - Hera Kim-Berman
- Department of Orthodontics and Pediatric Dentistry, University of Michigan School of Dentistry, 1011 N. UniversityAnn Arbor, Michigan, 48109-1078
| | - Moses Lee
- Department of Biomedical Sciences, College of Medicine, Seoul National University275-1 Yongon-dong, Chongno-gu, Seoul, 110-768, Korea
| | - Paul J Benke
- Department of Medical Genetics, Joe DiMaggio Children's Hospital1150 N. 35th Avenue, Suite 490, Hollywood, Florida, 33021
| | - K C Kent Lloyd
- Mouse Biology Program (MBP), University of California2795 Second Street, Suite 400, Davis, California, 95618
| | - James P Simmer
- Department of Biologic and Materials Sciences, University of Michigan School of Dentistry1210 Eisenhower Place, Ann Arbor, Michigan, 48108
| | - Jan C-C Hu
- Department of Biologic and Materials Sciences, University of Michigan School of Dentistry1210 Eisenhower Place, Ann Arbor, Michigan, 48108
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Mostowska A, Biedziak B, Zadurska M, Matuszewska-Trojan S, Jagodziński PP. WNT10Acoding variants and maxillary lateral incisor agenesis with associated dental anomalies. Eur J Oral Sci 2014; 123:1-8. [DOI: 10.1111/eos.12165] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/02/2014] [Indexed: 12/16/2022]
Affiliation(s)
- Adrianna Mostowska
- Department of Biochemistry and Molecular Biology; Poznan University of Medical Sciences; Poznan Poland
| | - Barbara Biedziak
- Department of Biochemistry and Molecular Biology; Poznan University of Medical Sciences; Poznan Poland
- Private Orthodontic Practice; Poznan Poland
| | - Małgorzata Zadurska
- Department of Orthodontics; Institute of Dentistry; Medical University of Warsaw; Warsaw Poland
| | - Sylwia Matuszewska-Trojan
- Department of Biochemistry and Molecular Biology; Poznan University of Medical Sciences; Poznan Poland
| | - Paweł P. Jagodziński
- Department of Biochemistry and Molecular Biology; Poznan University of Medical Sciences; Poznan Poland
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Abdalla EM, Mostowska A, Jagodziński PP, Dwidar K, Ismail SR. A novel WNT10A mutation causes non-syndromic hypodontia in an Egyptian family. Arch Oral Biol 2014; 59:722-8. [DOI: 10.1016/j.archoralbio.2014.04.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2013] [Revised: 03/17/2014] [Accepted: 04/13/2014] [Indexed: 11/28/2022]
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