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Yu S, Liu D, Yan C, Yuan C, Zhang C, Zheng S. A novel mutation in GPR68 causes hypomaturation amelogenesis imperfecta. Arch Oral Biol 2024; 164:105991. [PMID: 38761453 DOI: 10.1016/j.archoralbio.2024.105991] [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: 01/13/2024] [Revised: 05/01/2024] [Accepted: 05/03/2024] [Indexed: 05/20/2024]
Abstract
OBJECTIVES To identify the genetic cause of a Chinese family with hypomaturation amelogenesis imperfecta (AI) and to characterize the structure of GPR68 mutated enamel in order to develop a deeper understanding of the role of the GPR68 protein during the intricate process of amelogenesis. DESIGN One Chinese family with generalized hypomaturation AI was recruited. Two of the third molars from the proband were subjected to scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX). Whole exome sequencing (WES) was performed, and the identified mutation was confirmed by Sanger sequencing. Bioinformatics studies were further conducted to analyze the potential deleterious effects of the mutation. RESULTS The proband presented with a hypomaturation AI phenotype, characterized by fragile and discolored enamel surface. The AI enamel showed prismatic structure, which was sporadically obscured by areas of amorphous material and porous structure. EDX analysis showed the proband's enamel demonstrated a significant decrease in calcium and phosphorus content and a significant increase in oxygen compared with normal enamel. A novel homozygous mutation of G protein-coupled receptor 68 (GPR68) (c .149 T > A, p.Ile50Asn) was identified in the proband. Bioinformatics analysis indicated that the mutation site displayed a high level of evolutionary conservation among species, and the mutation might impact the stability and conformation of the protein. CONCLUSION The novel homozygous GPR68 mutation resulted in hypomaturation AI. We first described the effect of GPR68 mutation on enamel structure. Our results provide new genetic evidence that mutations involved in GPR68 contribute to hypomaturation AI.
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Affiliation(s)
- Shunlan Yu
- Department of Preventive Dentistry, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology & NHC Key Laboratory of Digital Stomatology & NMPA Key Laboratory for Dental Materials, Beijing, PR China
| | - Dandan Liu
- Department of Preventive Dentistry, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology & NHC Key Laboratory of Digital Stomatology & NMPA Key Laboratory for Dental Materials, Beijing, PR China
| | - Changqing Yan
- Department of Preventive Dentistry, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology & NHC Key Laboratory of Digital Stomatology & NMPA Key Laboratory for Dental Materials, Beijing, PR China
| | - Chao Yuan
- Department of Preventive Dentistry, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology & NHC Key Laboratory of Digital Stomatology & NMPA Key Laboratory for Dental Materials, Beijing, PR China
| | - Chenying Zhang
- Department of Preventive Dentistry, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology & NHC Key Laboratory of Digital Stomatology & NMPA Key Laboratory for Dental Materials, Beijing, PR China.
| | - Shuguo Zheng
- Department of Preventive Dentistry, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology & NHC Key Laboratory of Digital Stomatology & NMPA Key Laboratory for Dental Materials, Beijing, PR China.
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Möhlhenrich SC, Chhatwani S, Schmidt P, Kniha K, Postberg J, Schulte AG, Jackowski J, Zimmer S, Danesh G. Orthodontic findings and treatment need in patients with amelogenesis imperfecta: a descriptive analysis. Head Face Med 2024; 20:36. [PMID: 38877506 DOI: 10.1186/s13005-024-00436-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Accepted: 06/06/2024] [Indexed: 06/16/2024] Open
Abstract
INTRODUCTION Amelogenesis imperfecta (AI) is a genetically determined, non-syndromic enamel dysplasia that may manifest as hypoplasia, hypomaturation, or hypocalcification and can commonly be classified into four primary groups. In this retrospective analysis, specific orofacial characteristics are described and associated with each of the AI types based on a patient cohort from Witten/Herdecke University, Germany. METHODS Data from 19 patients (ten male and nine female, mean age 12.27 ± 4.06 years) with AI who presented at the Department of Orthodontics between July 2011 and December 2023 were analyzed. Baseline skeletal and dental conditions were assessed, including the presence of hypodontia, displacements, and taurodontism. AI was classified into classes I-IV based on phenotype. Treatment needs were evaluated according to the main findings following the German KIG classification, while the radiological enamel situation was determined using panoramic radiographs. RESULTS An approximately equal distribution between classes II and III was found and a slight inclination toward a dolichofacial configuration (ΔML-NSL: 5.07 ± 9.23°, ΔML-NL: 4.24 ± 8.04°). Regarding orthodontic findings, disturbance in tooth eruption as well as open bite were the most prevalent issues (both 36.8%, n = 7). The most common AI classes were type I and II, which show an almost even distribution about the skeletal classes in sagittal dimension, while dolichofacial configuration was found most frequently in vertical dimension. CONCLUSION Both clinical and radiological orthodontic findings in context with AI are subject to extensive distribution. It seems that no specific orofacial findings can be confirmed in association with AI with regard to the common simple classes I-IV. It may be more appropriate to differentiate the many subtypes according to their genetic aspects to identify possible associated orthodontic findings.
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Affiliation(s)
| | - Sachin Chhatwani
- Department of Orthodontics, Witten/Herdecke University, Alfred-Herrhausen Str. 45, 58455, Witten, Germany
| | - Peter Schmidt
- Department of Special Care Dentistry, Witten/Herdecke University, Alfred-Herrhausen Str. 45, 58455, Witten, Germany
| | - Kristian Kniha
- Department of Oral and Maxillofacial Surgery, University Hospital of Aachen, Pauwelsstraße 30, 52074, Aachen, Germany
| | - Jan Postberg
- Clinical Molecular Genetics and Epigenetics, Faculty of Health, Centre for Biomedical Education and Research (ZBAF), Witten/Herdecke University, Alfred-Herrhausen Str. 50, 58455, Witten, Germany
| | - Andreas G Schulte
- Department of Special Care Dentistry, Witten/Herdecke University, Alfred-Herrhausen Str. 45, 58455, Witten, Germany
| | - Jochen Jackowski
- Department of Oral Surgery, Witten/Herdecke University, Alfred-Herrhausen Str. 45, 58455, Witten, Germany
| | - Stefan Zimmer
- Faculty of Health, Department of Dental Medicine, Department of Operative and Preventive Dentistry, Witten/Herdecke University, Alfred-Herrhausen-Str. 50, 58448, Witten, Germany
| | - Gholamreza Danesh
- Department of Orthodontics, Witten/Herdecke University, Alfred-Herrhausen Str. 45, 58455, Witten, Germany
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Wang YL, Lin HC, Liang T, Lin JY, Simmer J, Hu JC, Wang SK. ENAM Mutations Can Cause Hypomaturation Amelogenesis Imperfecta. J Dent Res 2024; 103:662-671. [PMID: 38716742 PMCID: PMC11122092 DOI: 10.1177/00220345241236695] [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: 05/12/2024] Open
Abstract
Amelogenesis imperfecta (AI) is a diverse group of inherited diseases featured by various presentations of enamel malformations that are caused by disturbances at different stages of enamel formation. While hypoplastic AI suggests a thickness defect of enamel resulting from aberrations during the secretory stage of amelogenesis, hypomaturation AI indicates a deficiency of enamel mineralization and hardness established at the maturation stage. Mutations in ENAM, which encodes the largest enamel matrix protein, enamelin, have been demonstrated to cause generalized or local hypoplastic AI. Here, we characterized 2 AI families with disparate hypoplastic and hypomaturation enamel defects and identified 2 distinct indel mutations at the same location of ENAM, c588+1del and c.588+1dup. Minigene splicing assays demonstrated that they caused frameshifts and truncation of ENAM proteins, p.Asn197Ilefs*81 and p.Asn197Glufs*25, respectively. In situ hybridization of Enam on mouse mandibular incisors confirmed its restricted expression in secretory stage ameloblasts and suggested an indirect pathogenic mechanism underlying hypomaturation AI. In silico analyses indicated that these 2 truncated ENAMs might form amyloid structures and cause protein aggregation with themselves and with wild-type protein through the added aberrant region at their C-termini. Consistently, protein secretion assays demonstrated that the truncated proteins cannot be properly secreted and impede secretion of wild-type ENAM. Moreover, compared to the wild-type, overexpression of the mutant proteins significantly increased endoplasmic reticulum stress and upregulated the expression of unfolded protein response (UPR)-related genes and TNFRSF10B, a UPR-controlled proapoptotic gene. Caspase, terminal deoxynucleotidyl transferase UTP nick-end labeling (TUNEL), and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide (MTT) assays further revealed that both truncated proteins, especially p.Asn197Ilefs*81, induced cell apoptosis and decreased cell survival, suggesting that the 2 ENAM mutations cause AI through ameloblast cell pathology and death rather than through a simple loss of function. This study demonstrates that an ENAM mutation can lead to generalized hypomaturation enamel defects and suggests proteinopathy as a potential pathogenesis for ENAM-associated AI.
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Affiliation(s)
- Y.-L. Wang
- Department of Dentistry, National Taiwan University School of Dentistry, Taipei City, Taiwan
- Department of Pediatric Dentistry, National Taiwan University Children’s Hospital, Taipei City, Taiwan
| | - H.-C. Lin
- Department of Dentistry, National Taiwan University School of Dentistry, Taipei City, Taiwan
| | - T. Liang
- Department of Biologic and Materials Sciences, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - J.C.-Y. Lin
- Department of Orthodontics and Pediatric Dentistry, School of Dentistry, National Defense Medical University, Taipei City, Taiwan
| | - J.P. Simmer
- Department of Biologic and Materials Sciences, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - J.C.-C. Hu
- Department of Biologic and Materials Sciences, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - S.-K. Wang
- Department of Dentistry, National Taiwan University School of Dentistry, Taipei City, Taiwan
- Department of Pediatric Dentistry, National Taiwan University Children’s Hospital, Taipei City, Taiwan
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Rhaiem M, Chalbi M, Bousaid S, Zouaoui W, Chemli MA. Dental treatment approaches of amelogenesis imperfecta in children and young adults: A systematic review of the literature. J ESTHET RESTOR DENT 2024; 36:881-891. [PMID: 38258433 DOI: 10.1111/jerd.13191] [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: 10/12/2023] [Revised: 12/13/2023] [Accepted: 12/15/2023] [Indexed: 01/24/2024]
Abstract
OBJECTIVE The aim of this review was to compare various types of restorations used in children and young adults affected with amelogenesis imperfecta (AI) to determine the most effective restorative treatment. METHODS This systematic review included randomized controlled trials, retrospective and prospective cohorts conducted on children and young adults diagnosed with amelogenesis imperfecta and written in French or English. A systematic search was conducted using four databases, namely Cochrane Central Register of Controlled Trials (CENTRAL), MEDLINE via PubMed, Science Direct and Scopus, using a selection of MeSH terms: "Amelogenesis Imperfecta," "Therapeutics," "Treatment Outcome," "Adult, young," "Child," "Dental Restoration, Permanent," "Dental Restoration, Temporary," and "Esthetics, Dental." RESULTS Out of 138 articles identified in the initial search, four articles met all the inclusion criteria. The results showed that ceramic restorations had better quality scores and longevity compared to other restorations. CONCLUSION Ceramic restorations could be considered the restorative treatment modality of choice for AI-affected children and young adults. However, more high-quality clinical trials involving young patients affected with AI are required to evaluate and compare the outcomes of different restorative approaches. CLINICAL SIGNIFICANCE Young patients affected with amelogenesis imperfecta usually suffer from low self-esteem, psychological problems and social avoidance, caused by the alteration of teeth such as discoloration, sensitivity, fractures and reduced size. For the dentist, selecting the appropriate restorative treatment for AI in young patients could be a veritable challenge. Therefore, it is important to have an evidence-based modality. For this reason, in this review, the different restorative approaches used in AI-affected young patients were compared to recommend the most effective treatment.
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Affiliation(s)
- Miniar Rhaiem
- Pediatric Dentistry Department, La Rabta Hospital, Tunis, Tunisia
- Laboratory of Research ABCDF, University of Monastir, Monastir, Tunisia
- Pediatric Dentistry Department, Faculty of Dental Medicine of Monastir, Monastir, Tunisia
| | - Manel Chalbi
- Pediatric Dentistry Department, La Rabta Hospital, Tunis, Tunisia
- Laboratory of Research ABCDF, University of Monastir, Monastir, Tunisia
- Pediatric Dentistry Department, Faculty of Dental Medicine of Monastir, Monastir, Tunisia
| | - Soumaya Bousaid
- Rheumatology Department, La Rabta Hospital, Tunis, Tunisia
- Rheuamatology Department, Faculty of Medicine of Tunis, Tunis, Tunisia
- Rheumatology Department, Tunis El Manar University, Tunis, Tunisia
| | - Wiem Zouaoui
- Pediatric Dentistry Department, La Rabta Hospital, Tunis, Tunisia
- Laboratory of Research ABCDF, University of Monastir, Monastir, Tunisia
- Pediatric Dentistry Department, Faculty of Dental Medicine of Monastir, Monastir, Tunisia
| | - Mohamed Ali Chemli
- Pediatric Dentistry Department, La Rabta Hospital, Tunis, Tunisia
- Laboratory of Research ABCDF, University of Monastir, Monastir, Tunisia
- Pediatric Dentistry Department, Faculty of Dental Medicine of Monastir, Monastir, Tunisia
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AlHadidi A, Lam PPY, Hassona Y. Developmental and Acquired Abnormalities of the Teeth. Dent Clin North Am 2024; 68:227-245. [PMID: 38417988 DOI: 10.1016/j.cden.2023.09.001] [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] [Indexed: 03/01/2024]
Abstract
This review aims to present a detailed analysis of the most common developmental and acquired dental abnormalities, including caries, resorptive lesions, and congenital anomalies of teeth number, size, form, and structure. This review highlights how diagnostic imaging can aid in the accurate identification and management of these conditions.
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Affiliation(s)
- Abeer AlHadidi
- Oral and Maxillofacial Pathology, Radiology, and Medicine, NYU College of Dentistry, 345 East 24th Street, New York, NY 10010, USA; School of Dentistry, The University of Jordan, Queen Rania Street, Amman, Jordan 11942.
| | - Phoebe Pui Ying Lam
- The University of Hong Kong, Prince Philip Dental Hospital, 34 Hospital Road, Sai Ying Pun, Hong Kong
| | - Yazan Hassona
- School of Dentistry, The University of Jordan, Queen Rania Street, Amman, Jordan 11942; School of Dentistry, Al Ahliyya University
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Hany U, Watson CM, Liu L, Smith CEL, Harfoush A, Poulter JA, Nikolopoulos G, Balmer R, Brown CJ, Patel A, Simmonds J, Charlton R, Acosta de Camargo MG, Rodd HD, Jafri H, Antanaviciute A, Moffat M, Al-Jawad M, Inglehearn CF, Mighell AJ. Heterozygous COL17A1 variants are a frequent cause of amelogenesis imperfecta. J Med Genet 2024; 61:347-355. [PMID: 37979963 PMCID: PMC10982616 DOI: 10.1136/jmg-2023-109510] [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: 07/13/2023] [Accepted: 10/17/2023] [Indexed: 11/20/2023]
Abstract
BACKGROUND Collagen XVII is most typically associated with human disease when biallelic COL17A1 variants (>230) cause junctional epidermolysis bullosa (JEB), a rare, genetically heterogeneous, mucocutaneous blistering disease with amelogenesis imperfecta (AI), a developmental enamel defect. Despite recognition that heterozygous carriers in JEB families can have AI, and that heterozygous COL17A1 variants also cause dominant corneal epithelial recurrent erosion dystrophy (ERED), the importance of heterozygous COL17A1 variants causing dominant non-syndromic AI is not widely recognised. METHODS Probands from an AI cohort were screened by single molecule molecular inversion probes or targeted hybridisation capture (both a custom panel and whole exome sequencing) for COL17A1 variants. Patient phenotypes were assessed by clinical examination and analyses of affected teeth. RESULTS Nineteen unrelated probands with isolated AI (no co-segregating features) had 17 heterozygous, potentially pathogenic COL17A1 variants, including missense, premature termination codons, frameshift and splice site variants in both the endo-domains and the ecto-domains of the protein. The AI phenotype was consistent with enamel of near normal thickness and variable focal hypoplasia with surface irregularities including pitting. CONCLUSION These results indicate that COL17A1 variants are a frequent cause of dominantly inherited non-syndromic AI. Comparison of variants implicated in AI and JEB identifies similarities in type and distribution, with five identified in both conditions, one of which may also cause ERED. Increased availability of genetic testing means that more individuals will receive reports of heterozygous COL17A1 variants. We propose that patients with isolated AI or ERED, due to COL17A1 variants, should be considered as potential carriers for JEB and counselled accordingly, reflecting the importance of multidisciplinary care.
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Affiliation(s)
- Ummey Hany
- Leeds Institute of Medical Research, University of Leeds, St. James's University Hospital, Leeds, UK
| | - Christopher M Watson
- Leeds Institute of Medical Research, University of Leeds, St. James's University Hospital, Leeds, UK
- North East and Yorkshire Genomic Laboratory Hub, Central Lab, St. James's University Hospital, Leeds, UK
| | - Lu Liu
- Leeds Institute of Medical Research, University of Leeds, St. James's University Hospital, Leeds, UK
- School of Dentistry, Clarendon Way, University of Leeds, Leeds, UK
| | - Claire E L Smith
- Leeds Institute of Medical Research, University of Leeds, St. James's University Hospital, Leeds, UK
| | - Asmaa Harfoush
- School of Dentistry, Clarendon Way, University of Leeds, Leeds, UK
| | - James A Poulter
- Leeds Institute of Medical Research, University of Leeds, St. James's University Hospital, Leeds, UK
| | - Georgios Nikolopoulos
- Institute for Fundamental Biomedical Research, B.S.R.C. 'Alexander Fleming', Vari, Attica, Greece
| | - Richard Balmer
- School of Dentistry, Clarendon Way, University of Leeds, Leeds, UK
| | - Catriona J Brown
- Birmingham Dental Hospital, Mill Pool Way, Edgbaston, Birmingham, UK
| | - Anesha Patel
- LCRN West Midlands Core Team, NIHR Clinical Research Network (CRN), Birmingham Research Park (West Wing), Vincent Drive, Edgbaston, Birmingham, UK
| | - Jenny Simmonds
- North East and Yorkshire Genomic Laboratory Hub, Central Lab, St. James's University Hospital, Leeds, UK
| | - Ruth Charlton
- North East and Yorkshire Genomic Laboratory Hub, Central Lab, St. James's University Hospital, Leeds, UK
| | | | - Helen D Rodd
- Academic Unit of Oral Health Dentistry and Society, School of Clinical Dentistry, University of Sheffield, Sheffield, UK
| | - Hussain Jafri
- Fatima Jinnah Medical University, Punjab Thalassaemia and Other Genetic Disorders Prevention and Research Institute, Lahore, Pakistan
| | | | - Michelle Moffat
- Paediatric Dentistry, The Newcastle Upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
| | - Maisoon Al-Jawad
- School of Dentistry, Clarendon Way, University of Leeds, Leeds, UK
| | - Chris F Inglehearn
- Leeds Institute of Medical Research, University of Leeds, St. James's University Hospital, Leeds, UK
| | - Alan J Mighell
- School of Dentistry, Clarendon Way, University of Leeds, Leeds, UK
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Caussin É, Courson F, Dursun E, Brukarz Y, Dot D, Chaussain C, Attal J, François P. Interdisciplinary full mouth rehabilitation of a patient with amelogenesis imperfecta from childhood to young adult-hood: A 12-year case report. Clin Case Rep 2024; 12:e8704. [PMID: 38523819 PMCID: PMC10957491 DOI: 10.1002/ccr3.8704] [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: 01/22/2024] [Revised: 02/24/2024] [Accepted: 02/29/2024] [Indexed: 03/26/2024] Open
Abstract
Treatment of patients with amelogenesis imperfecta extends over many years, from childhood to early adulthood. Their management at any age is complex and has to be adapted in relation to therapies validated in the general population.
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Affiliation(s)
- Élisa Caussin
- Faculty of Dental SurgeryUniversity of Paris CitéMontrougeFrance
- Bretonneau Hospital, AP‐HPParisFrance
- URB2i, Université of Paris CitéMontrougeFrance
| | - Frédéric Courson
- Faculty of Dental SurgeryUniversity of Paris CitéMontrougeFrance
- Bretonneau Hospital, AP‐HPParisFrance
- URB2i, Université of Paris CitéMontrougeFrance
| | - Elisabeth Dursun
- Faculty of Dental SurgeryUniversity of Paris CitéMontrougeFrance
- URB2i, Université of Paris CitéMontrougeFrance
- Henri Mondor Hospital, AP‐HPCréteilFrance
| | | | - Daniel Dot
- Faculty of Dental SurgeryUniversity of Paris CitéMontrougeFrance
- Bretonneau Hospital, AP‐HPParisFrance
| | - Catherine Chaussain
- Faculty of Dental SurgeryUniversity of Paris CitéMontrougeFrance
- Bretonneau Hospital, AP‐HPParisFrance
- Laboratory Unité de Recherche 2496 Orofacial Pathologies, Imaging and Biotherapies, University of Paris CitéParisFrance
| | - Jean‐Pierre Attal
- Faculty of Dental SurgeryUniversity of Paris CitéMontrougeFrance
- URB2i, Université of Paris CitéMontrougeFrance
- Charles Foix Hospital, AP‐HPIvry‐Sur‐SeineFrance
| | - Philippe François
- Faculty of Dental SurgeryUniversity of Paris CitéMontrougeFrance
- Bretonneau Hospital, AP‐HPParisFrance
- URB2i, Université of Paris CitéMontrougeFrance
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Monteiro J, Balmer R, Lafferty F, Lyne A, Mighell A, O'Donnell K, Parekh S. Establishment of a clinical network for children with amelogenesis imperfecta and dentinogenesis imperfecta in the UK: 4-year experience. Eur Arch Paediatr Dent 2024; 25:85-91. [PMID: 38308725 PMCID: PMC10943134 DOI: 10.1007/s40368-023-00859-2] [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: 10/05/2023] [Accepted: 12/13/2023] [Indexed: 02/05/2024]
Abstract
BACKGROUND Amelogenesis imperfecta (AI) and dentinogenesis imperfecta (DI) are two groups of genetically inherited conditions resulting in abnormal enamel and dentin formation, respectively. Children and young people may be adversely affected by these conditions, with significant reduction in oral health related quality of life. Dental management of children with AI and DI is often complex, which is exacerbated by the absence of clear referral pathways and scarce evidence-based guidelines. METHOD The need for increased knowledge and peer support led to the development of a group of UK paediatric dentists with a special clinical interest in the management of children with AI and DI. PURPOSE The aims of this paper are to describe the establishment of an AI/DI Clinical Excellence Network (AI/DI CEN) in paediatric dentistry including outputs and future plans, and to share our collective learning to help support others anywhere in the world advance the care of people with AI or DI.
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Affiliation(s)
- J Monteiro
- Sheffield Teaching Hospitals, University of Sheffield, Sheffield, UK.
| | - R Balmer
- School of Dentistry, The University of Leeds, Leeds, UK
| | | | - A Lyne
- RNENTEDH, University College London Hospitals, London, UK
| | - A Mighell
- School of Dentistry, The University of Leeds, Leeds, UK
| | | | - S Parekh
- UCL Eastman Dental Institute, London, UK
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Wang CI, Sinada N. Prosthodontic rehabilitation of two siblings with hypoplastic (type 1) amelogenesis imperfecta: A case report. Heliyon 2024; 10:e23939. [PMID: 38192821 PMCID: PMC10772245 DOI: 10.1016/j.heliyon.2023.e23939] [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: 11/19/2023] [Revised: 12/12/2023] [Accepted: 12/15/2023] [Indexed: 01/10/2024] Open
Abstract
Amelogenesis imperfecta is a rare genetic disorder that interferes with normal enamel formation. Of the 4 main types of amelogenesis imperfecta, hypoplastic (type 1) is the most prevalent, characterized by a quantitative alteration in enamel. The pitting or reduced thickness of the enamel results in generalized hypersensitivity, increased susceptibility to caries and infection, attrition, and a loss in vertical dimension of occlusion. Prosthodontic management of these patients can be challenging not only functionally and restoratively, but also from an emotional and psychosocial standpoint. This clinical report describes the prosthodontic management and rehabilitation of two young adult siblings with hypoplastic (type 1) amelogenesis imperfecta.
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Jimenez-Armijo A, Morkmued S, Ahumada JT, Kharouf N, de Feraudy Y, Gogl G, Riet F, Niederreither K, Laporte J, Birling MC, Selloum M, Herault Y, Hernandez M, Bloch-Zupan A. The Rogdi knockout mouse is a model for Kohlschütter-Tönz syndrome. Sci Rep 2024; 14:445. [PMID: 38172607 PMCID: PMC10764811 DOI: 10.1038/s41598-023-50870-2] [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: 07/24/2023] [Accepted: 12/27/2023] [Indexed: 01/05/2024] Open
Abstract
Kohlschütter-Tönz syndrome (KTS) is a rare autosomal recessive disorder characterized by severe intellectual disability, early-onset epileptic seizures, and amelogenesis imperfecta. Here, we present a novel Rogdi mutant mouse deleting exons 6-11- a mutation found in KTS patients disabling ROGDI function. This Rogdi-/- mutant model recapitulates most KTS symptoms. Mutants displayed pentylenetetrazol-induced seizures, confirming epilepsy susceptibility. Spontaneous locomotion and circadian activity tests demonstrate Rogdi mutant hyperactivity mirroring patient spasticity. Object recognition impairment indicates memory deficits. Rogdi-/- mutant enamel was markedly less mature. Scanning electron microscopy confirmed its hypomineralized/hypomature crystallization, as well as its low mineral content. Transcriptomic RNA sequencing of postnatal day 5 lower incisors showed downregulated enamel matrix proteins Enam, Amelx, and Ambn. Enamel crystallization appears highly pH-dependent, cycling between an acidic and neutral pH during enamel maturation. Rogdi-/- teeth exhibit no signs of cyclic dental acidification. Additionally, expression changes in Wdr72, Slc9a3r2, and Atp6v0c were identified as potential contributors to these tooth acidification abnormalities. These proteins interact through the acidifying V-ATPase complex. Here, we present the Rogdi-/- mutant as a novel model to partially decipher KTS pathophysiology. Rogdi-/- mutant defects in acidification might explain the unusual combination of enamel and rare neurological disease symptoms.
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Affiliation(s)
- Alexandra Jimenez-Armijo
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, CNRS- UMR7104, Université de Strasbourg, Illkirch, France
| | - Supawich Morkmued
- Pediatrics Division, Department of Preventive Dentistry, Faculty of Dentistry, Khon Kaen University, Khon Kaen, Thailand
| | - José Tomás Ahumada
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, CNRS- UMR7104, Université de Strasbourg, Illkirch, France
| | - Naji Kharouf
- Laboratoire de Biomatériaux et Bioingénierie, Inserm UMR_S 1121, Université de Strasbourg, Strasbourg, France
| | - Yvan de Feraudy
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, CNRS- UMR7104, Université de Strasbourg, Illkirch, France
- Department of Neuropediatrics, Strasbourg University Hospital, Strasbourg, France
| | - Gergo Gogl
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, CNRS- UMR7104, Université de Strasbourg, Illkirch, France
| | - Fabrice Riet
- CNRS, INSERM, CELPHEDIA, PHENOMIN, Institut Clinique de la Souris (ICS), Université de Strasbourg, Illkirch, France
| | - Karen Niederreither
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, CNRS- UMR7104, Université de Strasbourg, Illkirch, France
| | - Jocelyn Laporte
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, CNRS- UMR7104, Université de Strasbourg, Illkirch, France
| | - Marie Christine Birling
- CNRS, INSERM, CELPHEDIA, PHENOMIN, Institut Clinique de la Souris (ICS), Université de Strasbourg, Illkirch, France
| | - Mohammed Selloum
- CNRS, INSERM, CELPHEDIA, PHENOMIN, Institut Clinique de la Souris (ICS), Université de Strasbourg, Illkirch, France
| | - Yann Herault
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, CNRS- UMR7104, Université de Strasbourg, Illkirch, France
- CNRS, INSERM, CELPHEDIA, PHENOMIN, Institut Clinique de la Souris (ICS), Université de Strasbourg, Illkirch, France
| | - Magali Hernandez
- Centre Hospitalier Régional Universitaire de Nancy, Competence Center for Rare Oral and Dental Diseases, Université de Lorraine, Nancy, France
| | - Agnès Bloch-Zupan
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, CNRS- UMR7104, Université de Strasbourg, Illkirch, France.
- Faculté de Chirurgie Dentaire, Université de Strasbourg, Strasbourg, France.
- Institut d'études Avancées (USIAS), Université de Strasbourg, Strasbourg, France.
- Pôle de Médecine et Chirurgie Bucco-Dentaires, Hôpital Civil, Centre de Référence des Maladies Rares Orales et Dentaires, O-Rares, Filière Santé Maladies Rares TETE COU, European Reference Network ERN CRANIO, Hôpitaux Universitaires de Strasbourg (HUS), Strasbourg, France.
- Eastman Dental Institute, University College London, London, UK.
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11
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Hany U, Watson C, Liu L, Nikolopoulos G, Smith C, Poulter J, Brown C, Patel A, Rodd H, Balmer R, Harfoush A, Al-Jawad M, Inglehearn C, Mighell A. Novel Ameloblastin Variants, Contrasting Amelogenesis Imperfecta Phenotypes. J Dent Res 2024; 103:22-30. [PMID: 38058155 PMCID: PMC10734210 DOI: 10.1177/00220345231203694] [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: 12/08/2023] Open
Abstract
Amelogenesis imperfecta (AI) comprises a group of rare, inherited disorders with abnormal enamel formation. Ameloblastin (AMBN), the second most abundant enamel matrix protein (EMP), plays a critical role in amelogenesis. Pathogenic biallelic loss-of-function AMBN variants are known to cause recessive hypoplastic AI. A report of a family with dominant hypoplastic AI attributed to AMBN missense change p.Pro357Ser, together with data from animal models, suggests that the consequences of AMBN variants in human AI remain incompletely characterized. Here we describe 5 new pathogenic AMBN variants in 11 individuals with AI. These fall within 3 groups by phenotype. Group 1, consisting of 6 families biallelic for combinations of 4 different variants, have yellow hypoplastic AI with poor-quality enamel, consistent with previous reports. Group 2, with 2 families, appears monoallelic for a variant shared with group 1 and has hypomaturation AI of near-normal enamel volume with pitting. Group 3 includes 3 families, all monoallelic for a fifth variant, which are affected by white hypoplastic AI with a thin intact enamel layer. Three variants, c.209C>G; p.(Ser70*) (groups 1 and 2), c.295T>C; p.(Tyr99His) (group 1), and c.76G>A; p.(Ala26Thr) (group 3) were identified in multiple families. Long-read AMBN locus sequencing revealed these variants are on the same conserved haplotype, implying they originate from a common ancestor. Data presented therefore provide further support for possible dominant as well as recessive inheritance for AMBN-related AI and for multiple contrasting phenotypes. In conclusion, our findings suggest pathogenic AMBN variants have a more complex impact on human AI than previously reported.
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Affiliation(s)
- U. Hany
- Leeds Institute of Medical Research, University of Leeds, St. James’s University Hospital, Leeds, UK
| | - C.M. Watson
- Leeds Institute of Medical Research, University of Leeds, St. James’s University Hospital, Leeds, UK
- North East and Yorkshire Genomic Laboratory Hub, Central Lab, St. James’s University Hospital, Leeds, UK
| | - L. Liu
- Leeds Institute of Medical Research, University of Leeds, St. James’s University Hospital, Leeds, UK
- School of Dentistry, Clarendon Way, University of Leeds, Leeds, UK
| | - G. Nikolopoulos
- Leeds Institute of Medical Research, University of Leeds, St. James’s University Hospital, Leeds, UK
| | - C.E.L. Smith
- Leeds Institute of Medical Research, University of Leeds, St. James’s University Hospital, Leeds, UK
| | - J.A. Poulter
- Leeds Institute of Medical Research, University of Leeds, St. James’s University Hospital, Leeds, UK
| | - C.J. Brown
- Birmingham Dental Hospital, Mill Pool Way, Edgbaston, Birmingham, UK
| | - A. Patel
- LCRN West Midlands Core Team, NIHR Clinical Research Network (CRN), Birmingham Research Park (West Wing), Edgbaston, Birmingham, UK
| | - H.D. Rodd
- Academic Unit of Oral Health Dentistry and Society, School of Clinical Dentistry, University of Sheffield, Sheffield, S Yorks, UK
| | - R. Balmer
- School of Dentistry, Clarendon Way, University of Leeds, Leeds, UK
| | - A. Harfoush
- School of Dentistry, Clarendon Way, University of Leeds, Leeds, UK
| | - M. Al-Jawad
- School of Dentistry, Clarendon Way, University of Leeds, Leeds, UK
| | - C.F. Inglehearn
- Leeds Institute of Medical Research, University of Leeds, St. James’s University Hospital, Leeds, UK
| | - A.J. Mighell
- School of Dentistry, Clarendon Way, University of Leeds, Leeds, UK
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12
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Wang SK, Lee ZH, Aref P, Chu KY. A novel ODAPH mutation causing amelogenesis imperfecta and its expression in human dental tissues. J Dent Sci 2024; 19:524-531. [PMID: 38303846 PMCID: PMC10829723 DOI: 10.1016/j.jds.2023.09.020] [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: 09/16/2023] [Revised: 09/18/2023] [Indexed: 02/03/2024] Open
Abstract
Background/purpose Amelogenesis imperfecta (AI), an assemblage of genetic diseases with dental enamel malformations, is generally grouped into hypoplastic, hypomaturation, and hypocalcified types. This study aimed to identify the genetic etiology for a consanguineous Iranian family with autosomal recessive hypocalcified AI. Materials and methods Dental defects were characterized, and whole exome analysis conducted to search for disease-causing mutations. Minigene assay and RT-PCR were performed to evaluate molecular consequences of the identified mutation and expression of the causative gene in human dental tissues. Results The defective enamel of erupted teeth showed extensive post-eruptive failure and discoloration. Partial enamel hypoplasia and indistinct dentino-enamel junction were evident on unerupted teeth, resembling hypocalcified AI. A novel homozygous ODAPH (previously designated C4orf26) mutation of single-nucleotide deletion (NG_032974.1:g.5103del, NM_178497.5:c.67+1del) was identified to be disease-causing. The mutation would cause a frameshift to different ODAPH transcript variant (TV) products: p.(Ala23Hisfs∗29) for TV1 and p.(Gly23Aspfs∗140) for TV2. Both dental pulps of developing and exfoliating primary teeth expressed ODAPH TV2. Conclusion Loss-of-function ODAPH mutations can cause AI type IIIB (the hypocalcified, autosomal recessive type), rather than type IIA4 (the hypomaturation, pigmented autosomal recessive type). This study supports a hypothesis that the product of ODAPH TV2 is the single dominant ODAPH protein isoform critical for dental enamel formation and may also play an unappreciated role in development and homeostasis of dentin-pulp complex. Due to genetic heterogeneity and a nonideal genotype-phenotype correlation of AI, it is essential to perform genetic testing for patients with inherited enamel defects to make a definitive diagnosis.
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Affiliation(s)
- Shih-Kai Wang
- Department of Dentistry, National Taiwan University School of Dentistry, Taipei, Taiwan
- Department of Pediatric Dentistry, National Taiwan University Children's Hospital, Taipei, Taiwan
| | - Zhe-Hao Lee
- Department of Dentistry, National Taiwan University School of Dentistry, Taipei, Taiwan
| | - Parissa Aref
- Department of Pediatric Dentistry, Islamic Azad University Dental Branch of Tehran, Tehran, Iran
| | - Kuan-Yu Chu
- Department of Pediatric Dentistry, National Taiwan University Children's Hospital, Taipei, Taiwan
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13
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Sinada N, Wang CI. Fixed prosthodontic rehabilitation with a fully digital workflow for a teenage patient with amelogenesis imperfecta: A 2-year follow-up. J Prosthet Dent 2024; 131:1-6. [PMID: 35473905 DOI: 10.1016/j.prosdent.2022.02.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 02/20/2022] [Accepted: 02/21/2022] [Indexed: 11/21/2022]
Abstract
Amelogenesis imperfecta is a hereditary disorder that affects the enamel formation of the primary and permanent dentition and has significant consequences because hypersensitivity causes difficulty with oral hygiene, function, self-esteem, and quality of life. Patients diagnosed with amelogenesis imperfecta often require extensive treatment, often at an early age. Prosthodontic intervention of adolescent patients with amelogenesis imperfecta presents specific clinical challenges. This clinical report describes the fixed prosthodontic rehabilitation of a teenage patient with amelogenesis imperfecta by using a fully digital workflow throughout the treatment process, which facilitated functional, biomechanical, esthetic, and sociopsychological improvements.
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14
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Brown AT, Peak RM, Smithson CW, Bell C. Dental Abnormalities in Two Dental-Skeletal-Retinal Anomaly-Positive Cane Corso Dogs: A Case Series. J Vet Dent 2023:8987564231215170. [PMID: 38146186 DOI: 10.1177/08987564231215170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2023]
Abstract
Dental-skeletal-retinal-anomaly (DSRA) is a newly described collagenopathy in Cane Corso dogs. The causative mutation has been linked with splice defects within the melanoma inhibitory activity member 3 (MIA/3) gene that codes for the TANGO1 protein. This case series presents the first dental-related radiographic and histopathological abnormalities in two dogs with genetically confirmed DSRA. The clinical, radiological, and histological features are similar to those reported for MIA3/TANGO1 splice defects previously reported in humans and knockout mice. Common clinical features of these patients include generalized opalescent discoloration of the permanent dentition (intrinsic dyschromia), enamel defects, fractured teeth, vision loss, shortened physical stature, and orthopedic abnormalities that resulted in chronic, early-onset lameness. Intraoral radiography revealed delayed dentin deposition, evidence of endodontic disease, and dental hard tissue loss in both cases. Histopathologic findings for both cases were consistent with dentinogenesis imperfecta (DGI). DSRA exhibits autosomal recessive heritability and commercial diagnostic tests are now available. Clinicians should be aware of the etiopathogenesis, genetic inheritance and associated comorbidities in order to treat and counsel clients on the management of this condition. It is recommended that all breeding individuals be tested, and carriers be sterilized or omitted from the breeding population. This case study describes intraoral diagnoses, treatments, and follow-up of two DSRA-positive dogs.
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Affiliation(s)
| | | | | | - Cindy Bell
- Specialty Oral Pathology for Animals, LLC, Geneseo, IL, USA
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15
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Broutin A, K Bidi-Lebihan A, Canceill T, Vaysse F, Bloch-Zupan A, Bailleul-Forestier I, Noirrit-Esclassan E. Association between malocclusions and amelogenesis imperfecta genotype and phenotype: A systematic review. Int Orthod 2023; 21:100789. [PMID: 37494776 DOI: 10.1016/j.ortho.2023.100789] [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: 04/24/2023] [Revised: 06/19/2023] [Accepted: 06/24/2023] [Indexed: 07/28/2023]
Abstract
INTRODUCTION The aim of this systematic review (Prospero CRD42022323188) is to investigate whether an association exists in patients with amelogenesis imperfecta (AI) between occlusal characteristics and genotype on the one hand and enamel structural phenotype on the other. MATERIAL AND METHODS Reports up to May 2023 assessing occlusion of individuals with AI were browsed in a systematic search using Medline, Embase, ISI Web of Science, and the grey literature. Randomised control trials, case control studies, and case series specifying both occlusion, assessed by cephalometric or clinical analysis, and genotype or dental phenotype in patients with AI were included without any age limitation. Two authors independently selected the publications and extracted the data in accordance with the PRISMA statement. The risk of bias was assessed with the Critical Appraisal Checklists from the Johanna Briggs Institute. RESULTS Twenty-five articles were chosen from the 261 results. Most of the included publications were case series (n=22) and case control studies (n=3). Thirteen studies reported both a genotype (ENAM, FAM83H, FAM20A, DLX3, CNMM4, WDR72) and occlusal diagnostic. The methodological quality of the studies was moderate. All AI phenotypes showed an open bite (OB) rate around 35%, except mixed form. The other malocclusions were not often mentioned. No correlation between occlusal phenotype and genotype or AI phenotype could be identified in patients with AI, as most studies had short occlusal descriptions and small sample sizes. CONCLUSION OB malocclusions were more frequently reported in AI. This review highlighted the need for a more accurate description of orofacial features associated with AI, to better clarify the role of amelogenesis genes in the regulation of craniofacial morphogenesis and identify patients requiring orthognathic surgery at an early stage.
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Affiliation(s)
- Alice Broutin
- Paediatric Dentistry Unit, CHU de Toulouse, University Toulouse III, Toulouse, France; Team IDEA: identification, environments et anthropometry, UMR 5288, CAGT - Centre for Anthropobiology and Genomics of Toulouse. University Paul-Sabatier Toulouse III, Toulouse, France
| | - Angélique K Bidi-Lebihan
- Team IDEA: identification, environments et anthropometry, UMR 5288, CAGT - Centre for Anthropobiology and Genomics of Toulouse. University Paul-Sabatier Toulouse III, Toulouse, France
| | - Thibault Canceill
- Inserm, In COMM (Intestine ClinicOmics Microbiota & Metabolism), UMR 1297, Toulouse, France
| | - Frédéric Vaysse
- Paediatric Dentistry Unit, CHU de Toulouse, University Toulouse III, Toulouse, France; Team IDEA: identification, environments et anthropometry, UMR 5288, CAGT - Centre for Anthropobiology and Genomics of Toulouse. University Paul-Sabatier Toulouse III, Toulouse, France; Competence Centre of Oral Diseases, CHU de Toulouse, Toulouse, France
| | - Agnès Bloch-Zupan
- Reference Centre of Oral Diseases, CHU de Strasbourg, Strasbourg, France; Inserm U964, institut de génétique et de biologie moléculaire et cellulaire (IGBMC), UMR7104 CNRS-ULP, Strasbourg, France
| | - Isabelle Bailleul-Forestier
- Team IDEA: identification, environments et anthropometry, UMR 5288, CAGT - Centre for Anthropobiology and Genomics of Toulouse. University Paul-Sabatier Toulouse III, Toulouse, France; Competence Centre of Oral Diseases, CHU de Toulouse, Toulouse, France
| | - Emmanuelle Noirrit-Esclassan
- Team IDEA: identification, environments et anthropometry, UMR 5288, CAGT - Centre for Anthropobiology and Genomics of Toulouse. University Paul-Sabatier Toulouse III, Toulouse, France; Competence Centre of Oral Diseases, CHU de Toulouse, Toulouse, France; Inserm, UMR1297 I2MC, Toulouse, France.
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16
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Schultz KM, Penner CR. A Review of Selected Dental Anomalies With Histologic Features in the Pediatric Patient. Pediatr Dev Pathol 2023; 26:572-582. [PMID: 37962547 DOI: 10.1177/10935266231207045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
Unique dental conditions in children include odontogenic cysts and tumors, hereditary dental diseases, developmental anomalies, and lesions associated with the eruption of the primary or permanent teeth. Many of these conditions have long lasting effects on the adult dentition in terms of affecting esthetics, function, and overall quality of life. Inherited dental syndromes affect the dental hard tissues specifically the enamel, dentin, and/or cementum in a generalized manner, involving both primary and permanent teeth. These conditions manifest in altered quality or quantity of the hard tissues, leading to fragility, tooth loss and dental diseases such as caries, periapical pathology, and periodontal disease. This category includes amelogenesis imperfecta, dentinogenesis imperfecta, dentin dysplasia, hypophosphatasia, and hypophosphatemia. Developmental defects such as regional odontodysplasia are defined by involvement of the primary and permanent dentition in a localized manner, identified in early childhood. This review will elaborate on the histologic findings in these selected dental conditions with a discussion on clinical and radiographic findings, as well as molecular features wherever appropriate.
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Affiliation(s)
- Kathleen M Schultz
- Divisions of Pediatric Dentistry and Oral and Maxillofacial Pathology, Department of Dental Medicine, Zucker School of Medicine at Hofstra/Northwell Health, New Hyde Park, NY, USA
| | - Carla R Penner
- Department of Pathology, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
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17
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Wang SK, Zhang H, Wang YL, Seymen F, Koruyucu M, Simmer JP, Hu JCC. Phenotypic variability in LAMA3-associated amelogenesis imperfecta. Oral Dis 2023; 29:3514-3524. [PMID: 36326426 PMCID: PMC10154430 DOI: 10.1111/odi.14425] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 08/04/2022] [Accepted: 10/26/2022] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Amelogenesis imperfecta (AI) is defined as inherited enamel malformations. LAMA3 (laminin alpha-3) encodes a critical protein component of the basement membrane (laminin-332). Individuals carrying heterozygous LAMA3 mutations have previously been shown to have localized enamel defects. This study aimed to define clinical phenotypes and to discern the genetic etiology for four AI kindreds. MATERIALS AND METHODS Whole-exome analyses were conducted to search for sequence variants associated with the disorder, and micro-computed tomography (μCT) to characterize the enamel defects. RESULTS The predominant enamel phenotype was generalized thin enamel with defective pits and grooves. Horizonal bands of hypoplastic enamel with chalky-white discoloration and enamel hypomineralization were also observed and demonstrated by μCT analyses of affected teeth. Four disease-causing LAMA3 mutations (NM_198129.4:c.3712dup; c.5891dup; c.7367del; c.9400G > C) were identified. Compound heterozygous MMP20 mutations (NM_004771.4:c.539A > G; c.692C > T) were also found in one proband with more severe enamel defects, suggesting a mutational synergism on disease phenotypes. Further analyses of the AI-causing mutations suggested that both α3A (short) and α3B (long) isoforms of LAMA3 are essential for enamel formation. CONCLUSIONS Heterozygous LAMA3 mutations can cause generalized enamel defects (AI1A) with variable expressivity. Laminin-332 is critical not only for appositional growth but also enamel maturation.
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Affiliation(s)
- Shih-Kai Wang
- Department of Dentistry, National Taiwan University School of Dentistry, No.1, Changde St., Taipei City 100, Taiwan
- Department of Pediatric Dentistry, National Taiwan University Children’s Hospital, No.8, Zhongshan S. Rd., Taipei City 100, Taiwan
| | - Hong Zhang
- Department of Biologic and Materials Sciences, University of Michigan School of Dentistry, 1011 North University, Ann Arbor, MI 48108, USA
| | - Yin-Lin Wang
- Department of Dentistry, National Taiwan University School of Dentistry, No.1, Changde St., Taipei City 100, Taiwan
- Department of Pediatric Dentistry, National Taiwan University Children’s Hospital, No.8, Zhongshan S. Rd., Taipei City 100, Taiwan
| | - Figen Seymen
- Department of Pedodontics, Faculty of Dentistry, Altinbas University, Istanbul, 34147, Turkey
| | - Mine Koruyucu
- Department of Pedodontics, Faculty of Dentistry, Istanbul University, Istanbul, 34116, Turkey
| | - James P. Simmer
- Department of Biologic and Materials Sciences, University of Michigan School of Dentistry, 1011 North University, Ann Arbor, MI 48108, USA
| | - Jan C.-C. Hu
- Department of Biologic and Materials Sciences, University of Michigan School of Dentistry, 1011 North University, Ann Arbor, MI 48108, USA
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18
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Kim YJ, Lee Y, Chae W, Kim JW. Recessive COL17A1 Mutations and a Dominant LAMB3 Mutation Cause Hypoplastic Amelogenesis Imperfecta. J Pers Med 2023; 13:1494. [PMID: 37888105 PMCID: PMC10608278 DOI: 10.3390/jpm13101494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 10/02/2023] [Accepted: 10/13/2023] [Indexed: 10/28/2023] Open
Abstract
Hereditary conditions that affect tooth enamel in quantity and/or quality are called amelogenesis imperfecta (AI). AI can occur as an isolated condition or as a symptom of a syndrome. An OMIM search with the term "AI" yielded 79 result entries. Mutations in the same gene cause syndromic or non-syndromic AI, depending on the nature of the mutations. In this study, we recruited two AI families and performed mutational analysis using whole-exome sequencing. The proband of family 1, with hypoplastic pitted AI and mild localized atopic dermatitis, had compound heterozygous COL17A1 mutations (paternal NM_000494.4: c.3598G>T, p.Asp1200Tyr and maternal c.1700G>A, p.Gly567Glu). The proband of family 2, with hypoplastic pitted AI and Jervell and Lange-Nielsen syndrome, had a recurrent LAMB3 mutation (NM_000228.3: c.3463_3475del, p.(Glu1155Thrfs*51)) in addition to compound heterozygous mutations in the KCNQ1 gene.
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Affiliation(s)
- Youn Jung Kim
- Department of Pediatric Dentistry & DRI, School of Dentistry, Seoul National University, Seoul 03080, Republic of Korea; (Y.J.K.); (Y.L.); (W.C.)
| | - Yejin Lee
- Department of Pediatric Dentistry & DRI, School of Dentistry, Seoul National University, Seoul 03080, Republic of Korea; (Y.J.K.); (Y.L.); (W.C.)
| | - Wonseon Chae
- Department of Pediatric Dentistry & DRI, School of Dentistry, Seoul National University, Seoul 03080, Republic of Korea; (Y.J.K.); (Y.L.); (W.C.)
| | - Jung-Wook Kim
- Department of Pediatric Dentistry & DRI, School of Dentistry, Seoul National University, Seoul 03080, Republic of Korea; (Y.J.K.); (Y.L.); (W.C.)
- Department of Molecular Genetics & DRI, School of Dentistry, Seoul National University, Seoul 03080, Republic of Korea
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19
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Messaoudi Y, Kiliaridis S, Antonarakis GS. Craniofacial Cephalometric Characteristics and Open Bite Deformity in Individuals with Amelogenesis Imperfecta-A Systematic Review and Meta-Analysis. J Clin Med 2023; 12:jcm12113826. [PMID: 37298021 DOI: 10.3390/jcm12113826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 05/27/2023] [Accepted: 05/31/2023] [Indexed: 06/12/2023] Open
Abstract
BACKGROUND Individuals with amelogenesis imperfecta (AI) often present with malocclusions, especially a dental or skeletal anterior open bite (AOB). OBJECTIVES To evaluate the craniofacial characteristics in individuals with AI. MATERIAL AND METHODS A systematic literature search was conducted with the PubMed, Web of Science, Embase and Google Scholar databases to identify studies relating to the cephalometric characteristics of individuals with AI, without any language or publication date restrictions. The grey literature was searched using Google Scholar, Opengrey and Worldcat. Only studies with a suitable control group for comparison were included. Data extraction and a risk of bias assessment were carried out. A meta-analysis was performed using the random effects model for cephalometric variables that were evaluated in at least three studies. RESULTS The initial literature search yielded 1857 articles. Following the removal of duplicates and a screening of the records, seven articles were included in the qualitative synthesis, representing a total of 242 individuals with AI. Four studies were included in the quantitative synthesis. The meta-analysis results showed that individuals with AI present a smaller SNB angle and larger ANB angle than those of control groups in the sagittal plane. In the vertical plane, those with AI present a smaller overbite and larger intermaxillary angle than those without AI. No statistically significant differences were found for the SNA angle when comparing the two groups. CONCLUSIONS Individuals with AI seem to present with more vertical craniofacial growth, leading to an increased intermaxillary angle and decreased overbite. This possibly leads to a more retrognathic mandible with a larger ANB angle due to an anticipated posterior mandibular rotation.
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Affiliation(s)
- Yassine Messaoudi
- Division of Orthodontics, University Clinics of Dental Medicine, Faculty of Medicine, University of Geneva, 1 rue Michel-Servet, 1205 Geneva, Switzerland
| | - Stavros Kiliaridis
- Division of Orthodontics, University Clinics of Dental Medicine, Faculty of Medicine, University of Geneva, 1 rue Michel-Servet, 1205 Geneva, Switzerland
- Department of Orthodontics and Dentofacial Orthopedics, University of Bern, 3010 Bern, Switzerland
| | - Gregory S Antonarakis
- Division of Orthodontics, University Clinics of Dental Medicine, Faculty of Medicine, University of Geneva, 1 rue Michel-Servet, 1205 Geneva, Switzerland
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20
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Zeng S, Wu Y, Wang L, Huang Y, Huang W, Li Z, Gao W, Jiang S, Ge L, Zhang J. In vivo real-time assessment of developmental defects in enamel of anti-Act1 mice using optical coherence tomography. Heliyon 2023; 9:e16545. [PMID: 37274657 PMCID: PMC10238730 DOI: 10.1016/j.heliyon.2023.e16545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 05/10/2023] [Accepted: 05/18/2023] [Indexed: 06/06/2023] Open
Abstract
The purpose of this study was to explore the feasibility of using optical coherence tomography (OCT) for real-time and quantitative monitoring of enamel development in gene-edited enamel defect mice. NF-κB activator 1, known as Act1, is associated with many inflammatory diseases. The antisense oligonucleotide of Act1 was inserted after the CD68 gene promoter, which would cover the start region of the Act1 gene and inhibit its transcription. Anti-Act1 mice, gene-edited mice, were successfully constructed and demonstrated amelogenesis imperfecta by scanning electron microscope (SEM) and energy dispersive X-ray (EDX) spectroscopy. Wild-type (WT) mice were used as the control group in this study. WT mice and anti-Act1 mice at 3 weeks old were examined by OCT every week and killed at eight weeks old. Their mandibular bones were dissected and examined by OCT, micro-computed tomography (micro-CT), and SEM. OCT images showed that the outer layer of enamel of anti-Act1 mice was obviously thinner than that of WT mice but no difference in total thickness. When assessing enamel thickness, there was a significant normal linear correlation between these methods. OCT could scan the imperfect developed enamel noninvasively and quickly, providing images of the enamel layers of mouse incisors.
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Affiliation(s)
- Sujuan Zeng
- Department of Pedodontics, Affiliated Stomatology Hospital of Guangzhou Medical University, Guangdong Engineering Research Center of Oral Restoration and Reconstruction, Guangzhou Key Laboratory of Basic and Applied Research of Oral Regenerative Medicine, Guangzhou, 510182, China
| | - Yuejun Wu
- Department of Pedodontics, Affiliated Stomatology Hospital of Guangzhou Medical University, Guangdong Engineering Research Center of Oral Restoration and Reconstruction, Guangzhou Key Laboratory of Basic and Applied Research of Oral Regenerative Medicine, Guangzhou, 510182, China
| | - Lijing Wang
- Vascular Biology Research Institute, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Yuhang Huang
- Department of Pedodontics, Affiliated Stomatology Hospital of Guangzhou Medical University, Guangdong Engineering Research Center of Oral Restoration and Reconstruction, Guangzhou Key Laboratory of Basic and Applied Research of Oral Regenerative Medicine, Guangzhou, 510182, China
| | - Wenyan Huang
- Department of Pedodontics, Affiliated Stomatology Hospital of Guangzhou Medical University, Guangdong Engineering Research Center of Oral Restoration and Reconstruction, Guangzhou Key Laboratory of Basic and Applied Research of Oral Regenerative Medicine, Guangzhou, 510182, China
| | - Ziling Li
- Department of Pedodontics, Affiliated Stomatology Hospital of Guangzhou Medical University, Guangdong Engineering Research Center of Oral Restoration and Reconstruction, Guangzhou Key Laboratory of Basic and Applied Research of Oral Regenerative Medicine, Guangzhou, 510182, China
| | - Weijian Gao
- School of Biomedical Engineering, The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan People's Hospital, Guangzhou Medical University, Guangzhou, 511436, China
| | - Siqing Jiang
- Department of Temporomandibular Joint, Affiliated Stomatology Hospital of Guangzhou Medical University, Guangzhou Key Laboratory of Basic and Applied Research of Oral Regenerative Medicine, Guangzhou, 510182, China
| | - Lihong Ge
- Department of Pedodontics, Affiliated Stomatology Hospital of Guangzhou Medical University, Guangdong Engineering Research Center of Oral Restoration and Reconstruction, Guangzhou Key Laboratory of Basic and Applied Research of Oral Regenerative Medicine, Guangzhou, 510182, China
- Department of Pediatric Dentistry, Stomatology Hospital of Peking University, Beijing, 100081, China
| | - Jian Zhang
- Department of Pedodontics, Affiliated Stomatology Hospital of Guangzhou Medical University, Guangdong Engineering Research Center of Oral Restoration and Reconstruction, Guangzhou Key Laboratory of Basic and Applied Research of Oral Regenerative Medicine, Guangzhou, 510182, China
- School of Biomedical Engineering, The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan People's Hospital, Guangzhou Medical University, Guangzhou, 511436, China
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21
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Amer M. Intracoronal tooth bleaching - A review and treatment guidelines. Aust Dent J 2023; 68 Suppl 1:S141-S152. [PMID: 37975331 DOI: 10.1111/adj.13000] [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] [Accepted: 10/19/2023] [Indexed: 11/19/2023]
Abstract
Intracoronal bleaching is a minimally invasive procedure that was introduced into dentistry in the 19th century. The role of that procedure in enhancing the colour of teeth subjected to internal discolouration while being conservative made it extremely popular amongst dental professionals. Different materials and techniques have been utilized over the years attempting to obtain predictable long-term results while minimizing any associated risks. Contemporarily, bleaching agents are mainly based on peroxide-releasing compounds in different formulations and delivery systems. Different theories have been formulated on the bleaching mechanism of such agents, but the exact mechanism is yet to be proven. The effect of hydrogen peroxide-based bleaching agents on the organic structure of enamel and dentine has been extensively investigated to address the effects of bonding of resin-based restorative materials to hard tooth structure. Multiple case reports raised a concern about the contribution of intracoronal bleaching in developing invasive root resorption. Modification of intracoronal bleaching techniques was thus necessary to address such concerns. This review will provide a summary of the important aspects of intracoronal bleaching, focusing on how it applies to the contemporary clinical setting. © 2023 Australian Dental Association.
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Affiliation(s)
- M Amer
- Melbourne Dental School, Faculty of Medicine, Dentistry and Health Sciences, Melbourne, Victoria, Australia
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22
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Bloch-Zupan A, Rey T, Jimenez-Armijo A, Kawczynski M, Kharouf N, Dure-Molla MDL, Noirrit E, Hernandez M, Joseph-Beaudin C, Lopez S, Tardieu C, Thivichon-Prince B, Dostalova T, Macek M, Alloussi ME, Qebibo L, Morkmued S, Pungchanchaikul P, Orellana BU, Manière MC, Gérard B, Bugueno IM, Laugel-Haushalter V. Amelogenesis imperfecta: Next-generation sequencing sheds light on Witkop's classification. Front Physiol 2023; 14:1130175. [PMID: 37228816 PMCID: PMC10205041 DOI: 10.3389/fphys.2023.1130175] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Accepted: 03/06/2023] [Indexed: 05/27/2023] Open
Abstract
Amelogenesis imperfecta (AI) is a heterogeneous group of genetic rare diseases disrupting enamel development (Smith et al., Front Physiol, 2017a, 8, 333). The clinical enamel phenotypes can be described as hypoplastic, hypomineralized or hypomature and serve as a basis, together with the mode of inheritance, to Witkop's classification (Witkop, J Oral Pathol, 1988, 17, 547-553). AI can be described in isolation or associated with others symptoms in syndromes. Its occurrence was estimated to range from 1/700 to 1/14,000. More than 70 genes have currently been identified as causative. Objectives: We analyzed using next-generation sequencing (NGS) a heterogeneous cohort of AI patients in order to determine the molecular etiology of AI and to improve diagnosis and disease management. Methods: Individuals presenting with so called "isolated" or syndromic AI were enrolled and examined at the Reference Centre for Rare Oral and Dental Diseases (O-Rares) using D4/phenodent protocol (www.phenodent.org). Families gave written informed consents for both phenotyping and molecular analysis and diagnosis using a dedicated NGS panel named GenoDENT. This panel explores currently simultaneously 567 genes. The study is registered under NCT01746121 and NCT02397824 (https://clinicaltrials.gov/). Results: GenoDENT obtained a 60% diagnostic rate. We reported genetics results for 221 persons divided between 115 AI index cases and their 106 associated relatives from a total of 111 families. From this index cohort, 73% were diagnosed with non-syndromic amelogenesis imperfecta and 27% with syndromic amelogenesis imperfecta. Each individual was classified according to the AI phenotype. Type I hypoplastic AI represented 61 individuals (53%), Type II hypomature AI affected 31 individuals (27%), Type III hypomineralized AI was diagnosed in 18 individuals (16%) and Type IV hypoplastic-hypomature AI with taurodontism concerned 5 individuals (4%). We validated the genetic diagnosis, with class 4 (likely pathogenic) or class 5 (pathogenic) variants, for 81% of the cohort, and identified candidate variants (variant of uncertain significance or VUS) for 19% of index cases. Among the 151 sequenced variants, 47 are newly reported and classified as class 4 or 5. The most frequently discovered genotypes were associated with MMP20 and FAM83H for isolated AI. FAM20A and LTBP3 genes were the most frequent genes identified for syndromic AI. Patients negative to the panel were resolved with exome sequencing elucidating for example the gene involved ie ACP4 or digenic inheritance. Conclusion: NGS GenoDENT panel is a validated and cost-efficient technique offering new perspectives to understand underlying molecular mechanisms of AI. Discovering variants in genes involved in syndromic AI (CNNM4, WDR72, FAM20A … ) transformed patient overall care. Unravelling the genetic basis of AI sheds light on Witkop's AI classification.
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Affiliation(s)
- Agnes Bloch-Zupan
- Université de Strasbourg, Faculté de Chirurgie Dentaire, Strasbourg, France
- Université de Strasbourg, Institut d’études avancées (USIAS), Strasbourg, France
- Hôpitaux Universitaires de Strasbourg (HUS), Pôle de Médecine et Chirurgie Bucco-dentaires, Hôpital Civil, Centre de référence des maladies rares orales et dentaires, O-Rares, Filiére Santé Maladies rares TETE COU, European Reference Network ERN CRANIO, Strasbourg, France
- Université de Strasbourg, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), IN-SERM U1258, CNRS- UMR7104, Illkirch, France
- Eastman Dental Institute, University College London, London, United Kingdom
| | - Tristan Rey
- Université de Strasbourg, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), IN-SERM U1258, CNRS- UMR7104, Illkirch, France
- Hôpitaux Universitaires de Strasbourg, Laboratoires de diagnostic génétique, Institut de Génétique Médicale d’Alsace, Strasbourg, France
| | - Alexandra Jimenez-Armijo
- Université de Strasbourg, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), IN-SERM U1258, CNRS- UMR7104, Illkirch, France
| | - Marzena Kawczynski
- Hôpitaux Universitaires de Strasbourg (HUS), Pôle de Médecine et Chirurgie Bucco-dentaires, Hôpital Civil, Centre de référence des maladies rares orales et dentaires, O-Rares, Filiére Santé Maladies rares TETE COU, European Reference Network ERN CRANIO, Strasbourg, France
| | - Naji Kharouf
- Université de Strasbourg, Laboratoire de Biomatériaux et Bioingénierie, Inserm UMR_S 1121, Strasbourg, France
| | | | - Muriel de La Dure-Molla
- Rothschild Hospital, Public Assistance-Paris Hospitals (AP-HP), Reference Center for Rare Oral and Den-tal Diseases (O-Rares), Paris, France
| | - Emmanuelle Noirrit
- Centre Hospitalier Universitaire (CHU) Rangueil, Toulouse, Competence Center for Rare Oral and Den-tal Diseases, Toulouse, France
| | - Magali Hernandez
- Centre Hospitalier Régional Universitaire de Nancy, Université de Lorraine, Competence Center for Rare Oral and Dental Diseases, Nancy, France
| | - Clara Joseph-Beaudin
- Centre Hospitalier Universitaire de Nice, Competence Center for Rare Oral and Dental Diseases, Nice, France
| | - Serena Lopez
- Centre Hospitalier Universitaire de Nantes, Competence Center for Rare Oral and Dental Diseases, Nantes, France
| | - Corinne Tardieu
- APHM, Hôpitaux Universitaires de Marseille, Hôpital Timone, Competence Center for Rare Oral and Dental Diseases, Marseille, France
| | - Béatrice Thivichon-Prince
- Centre Hospitalier Universitaire de Lyon, Competence Center for Rare Oral and Dental Diseases, Lyon, France
| | | | - Tatjana Dostalova
- Department of Stomatology (TD) and Department of Biology and Medical Genetics (MM) Charles University 2nd Faculty of Medicine and Motol University Hospital, Prague, Czechia
| | - Milan Macek
- Department of Stomatology (TD) and Department of Biology and Medical Genetics (MM) Charles University 2nd Faculty of Medicine and Motol University Hospital, Prague, Czechia
| | | | - Mustapha El Alloussi
- Faculty of Dentistry, International University of Rabat, CReSS Centre de recherche en Sciences de la Santé, Rabat, Morocco
| | - Leila Qebibo
- Unité de génétique médicale et d’oncogénétique, CHU Hassan II, Fes, Morocco
| | | | | | - Blanca Urzúa Orellana
- Instituto de Investigación en Ciencias Odontológicas, Facultad de Odontología, Universidad de Chile, Santiago, Chile
| | - Marie-Cécile Manière
- Université de Strasbourg, Faculté de Chirurgie Dentaire, Strasbourg, France
- Hôpitaux Universitaires de Strasbourg (HUS), Pôle de Médecine et Chirurgie Bucco-dentaires, Hôpital Civil, Centre de référence des maladies rares orales et dentaires, O-Rares, Filiére Santé Maladies rares TETE COU, European Reference Network ERN CRANIO, Strasbourg, France
| | - Bénédicte Gérard
- Hôpitaux Universitaires de Strasbourg, Laboratoires de diagnostic génétique, Institut de Génétique Médicale d’Alsace, Strasbourg, France
| | - Isaac Maximiliano Bugueno
- Université de Strasbourg, Faculté de Chirurgie Dentaire, Strasbourg, France
- Hôpitaux Universitaires de Strasbourg (HUS), Pôle de Médecine et Chirurgie Bucco-dentaires, Hôpital Civil, Centre de référence des maladies rares orales et dentaires, O-Rares, Filiére Santé Maladies rares TETE COU, European Reference Network ERN CRANIO, Strasbourg, France
- Université de Strasbourg, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), IN-SERM U1258, CNRS- UMR7104, Illkirch, France
| | - Virginie Laugel-Haushalter
- Université de Strasbourg, Faculté de Chirurgie Dentaire, Strasbourg, France
- Université de Strasbourg, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), IN-SERM U1258, CNRS- UMR7104, Illkirch, France
- Hôpitaux Universitaires de Strasbourg, Laboratoires de diagnostic génétique, Institut de Génétique Médicale d’Alsace, Strasbourg, France
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Sriwattanapong K, Theerapanon T, Boonprakong L, Srijunbarl A, Porntaveetus T, Shotelersuk V. Novel ITGB6 variants cause hypoplastic-hypomineralized amelogenesis imperfecta and taurodontism: characterization of tooth phenotype and review of literature. BDJ Open 2023; 9:15. [PMID: 37041139 PMCID: PMC10090198 DOI: 10.1038/s41405-023-00142-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 03/11/2023] [Accepted: 03/23/2023] [Indexed: 04/13/2023] Open
Abstract
OBJECTIVES To characterize phenotype and genotype of amelogenesis imperfecta (AI) in a Thai patient, and review of literature. MATERIALS AND METHODS Variants were identified using trio-exome and Sanger sequencing. The ITGB6 protein level in patient's gingival cells was measured. The patient's deciduous first molar was investigated for surface roughness, mineral density, microhardness, mineral composition, and ultrastructure. RESULTS The patient exhibited hypoplastic-hypomineralized AI, taurodontism, and periodontal inflammation. Exome sequencing identified the novel compound heterozygous ITGB6 mutation, a nonsense c.625 G > T, p.(Gly209*) inherited from mother and a splicing c.1661-3 C > G from father, indicating AI type IH. The ITGB6 level in patient cells was significantly reduced, compared with controls. Analyses of a patient's tooth showed a significant increase in roughness while mineral density of enamel and microhardness of enamel and dentin were significantly reduced. In dentin, carbon was significantly decreased while calcium, phosphorus, and oxygen levels were significantly increased. Severely collapsed enamel rods and a gap in dentinoenamel junction were observed. Of six affected families and eight ITGB6 variants that have been reported, our patient was the only one with taurodontism. CONCLUSION We report the hypoplasia/hypomineralization/taurodontism AI patient with disturbed tooth characteristics associated with the novel ITGB6 variants and reduced ITGB6 expression, expanding genotype, phenotype, and understanding of autosomal recessive AI.
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Affiliation(s)
- Kanokwan Sriwattanapong
- Center of Excellence in Genomics and Precision Dentistry, Department of Physiology, Faculty of Dentistry, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Thanakorn Theerapanon
- Center of Excellence in Genomics and Precision Dentistry, Department of Physiology, Faculty of Dentistry, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Lawan Boonprakong
- Office of Research Affairs, Faculty of Dentistry, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Anucharte Srijunbarl
- Dental Materials R&D Center, Faculty of Dentistry, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Thantrira Porntaveetus
- Center of Excellence in Genomics and Precision Dentistry, Department of Physiology, Faculty of Dentistry, Chulalongkorn University, Bangkok, 10330, Thailand.
| | - Vorasuk Shotelersuk
- Center of Excellence for Medical Genomics, Department of Pediatrics, Faculty of Medicine, Chulalongkorn University, Bangkok, 10330, Thailand
- Excellence Center for Genomics and Precision Medicine, King Chulalongkorn Memorial Hospital, the Thai Red Cross Society, Bangkok, 10330, Thailand
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24
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Gadi LSA, Chau DYS, Parekh S. Morphological and Ultrastructural Collagen Defects: Impact and Implications in Dentinogenesis Imperfecta. Dent J (Basel) 2023; 11:dj11040095. [PMID: 37185473 PMCID: PMC10137525 DOI: 10.3390/dj11040095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 03/15/2023] [Accepted: 03/24/2023] [Indexed: 04/07/2023] Open
Abstract
Collagen is the building block for the extracellular matrix in bone, teeth and other fibrous tissues. Osteogenesis imperfecta (OI), or brittle bone disease, is a heritable disorder that results from defective collagen synthesis or metabolism, resulting in bone fragility. The dental manifestation of OI is dentinogenesis imperfecta (DI), a genetic disorder that affects dentin structure and clinical appearance, with a characteristic feature of greyish-brown discolouration. The aim of this study was to conduct a systematic review to identify and/or define any ultrastructural changes in dentinal collagen in DI. Established databases were searched: Cochrane Library, OVID Embase, OVID Medline and PubMed/Medline. Search strategies included: Collagen Ultrastructure, DI and OI. Inclusion criteria were studies written in English, published after 1990, that examined human dental collagen of teeth affected by DI. A Cochrane data extraction form was modified and used for data collection. The final dataset included seventeen studies published from 1993 to 2021. The most prevalent findings on collagen in DI teeth were increased coarse collagen fibres and decreased fibre quantity. Additional findings included changes to fibre orientation (i.e., random to parallel) and differences to the fibre organisation (i.e., regular to irregular). Ultrastructural defects and anomalies included uncoiled collagen fibres and increased D-banding periodicity. Studies in collagen structure in DI reported changes to the surface topography, quantity, organisation and orientation of the fibres. Moreover, ultrastructural defects such as the packing/coiling and D-banding of the fibrils, as well as differences in the presence of other collagens are also noted. Taken together, this study provides an understanding of the changes in collagen and its impact on clinical translation, paving the way for innovative treatments in dental treatment.
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Affiliation(s)
- Lubabah S. A. Gadi
- Department of Paediatric Dentistry, Eastman Dental Institute, University College London, Bloomsbury Campus, Rockefeller Building, 21 University Street, London WC1E 6DE, UK
- Department of Paediatric Dentistry, King Abdulaziz University Dental Hospital, Al Ehtifalat Street, Jeddah 22252, Saudi Arabia
| | - David Y. S. Chau
- Department of Division of Biomaterials and Tissue Engineering, Eastman Dental Institute, University College London, Royal Free Campus, Rowland Hill Street, London NW3 2PF, UK
| | - Susan Parekh
- Department of Paediatric Dentistry, Eastman Dental Institute, University College London, Bloomsbury Campus, Rockefeller Building, 21 University Street, London WC1E 6DE, UK
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25
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Enamel Phenotypes: Genetic and Environmental Determinants. Genes (Basel) 2023; 14:genes14030545. [PMID: 36980818 PMCID: PMC10048525 DOI: 10.3390/genes14030545] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Revised: 02/14/2023] [Accepted: 02/16/2023] [Indexed: 02/24/2023] Open
Abstract
Dental enamel is a specialized tissue that has adapted over millions of years of evolution to enhance the survival of a variety of species. In humans, enamel evolved to form the exterior protective layer for the crown of the exposed tooth crown. Its unique composition, structure, physical properties and attachment to the underlying dentin tissue allow it to be a resilient, although not self-repairing, tissue. The process of enamel formation, known as amelogenesis, involves epithelial-derived cells called ameloblasts that secrete a unique extracellular matrix that influences the structure of the mineralizing enamel crystallites. There are over 115 known genetic conditions affecting amelogenesis that are associated with enamel phenotypes characterized by either a reduction of enamel amount and or mineralization. Amelogenesis involves many processes that are sensitive to perturbation and can be altered by numerous environmental stressors. Genetics, epigenetics, and environment factors can influence enamel formation and play a role in resistance/risk for developmental defects and the complex disease, dental caries. Understanding why and how enamel is affected and the enamel phenotypes seen clinically support diagnostics, prognosis prediction, and the selection of treatment approaches that are appropriate for the specific tissue defects (e.g., deficient amount, decreased mineral, reduced insulation and hypersensitivity). The current level of knowledge regarding the heritable enamel defects is sufficient to develop a new classification system and consensus nosology that effectively communicate the mode of inheritance, molecular defect/pathway, and the functional aberration and resulting enamel phenotype.
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26
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Kim YJ, Zhang H, Lee Y, Seymen F, Koruyucu M, Kasimoglu Y, Simmer JP, Hu JCC, Kim JW. Novel WDR72 Mutations Causing Hypomaturation Amelogenesis Imperfecta. J Pers Med 2023; 13:326. [PMID: 36836560 PMCID: PMC9965932 DOI: 10.3390/jpm13020326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Revised: 02/10/2023] [Accepted: 02/11/2023] [Indexed: 02/16/2023] Open
Abstract
Amelogenesis imperfecta (AI) is a heterogeneous collection of hereditary enamel defects. The affected enamel can be classified as hypoplastic, hypomaturation, or hypocalcified in form. A better understanding of normal amelogenesis and improvements in our ability to diagnose AI through genetic testing can be realized through more complete knowledge of the genes and disease-causing variants that cause AI. In this study, mutational analysis was performed with whole exome sequencing (WES) to identify genetic etiology underlying the hypomaturation AI condition in affected families. Mutational analyses identified biallelic WDR72 mutations in four hypomaturation AI families. Novel mutations include a homozygous deletion and insertion mutation (NM_182758.4: c.2680_2699delinsACTATAGTT, p.(Ser894Thrfs*15)), compound heterozygous mutations (paternal c.2332dupA, p.(Met778Asnfs*4)) and (maternal c.1287_1289del, p.(Ile430del)) and a homozygous 3694 bp deletion that includes exon 14 (NG_017034.2:g.96472_100165del). A homozygous recurrent mutation variant (c.1467_1468delAT, p.(Val491Aspfs*8)) was also identified. Current ideas on WDR72 structure and function are discussed. These cases expand the mutational spectrum of WDR72 mutations causing hypomaturation AI and improve the possibility of genetic testing to accurately diagnose AI caused by WDR72 defects.
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Affiliation(s)
- Youn Jung Kim
- Department of Pediatric Dentistry & DRI, School of Dentistry, Seoul National University, Seoul 03080, Republic of Korea
| | - Hong Zhang
- Department of Biologic and Materials Sciences & Prosthodontics, School of Dentistry, University of Michigan, Ann Arbor, MI 48109, USA
| | - Yejin Lee
- Department of Pediatric Dentistry & DRI, School of Dentistry, Seoul National University, Seoul 03080, Republic of Korea
| | - Figen Seymen
- Department of Paediatric Dentistry, Faculty of Dentistry, Altinbas University, Istanbul 34147, Turkey
| | - Mine Koruyucu
- Department of Pedodontics, Faculty of Dentistry, Istanbul University, Istanbul 34116, Turkey
| | - Yelda Kasimoglu
- Department of Pedodontics, Faculty of Dentistry, Istanbul University, Istanbul 34116, Turkey
| | - James P. Simmer
- Department of Biologic and Materials Sciences & Prosthodontics, School of Dentistry, University of Michigan, Ann Arbor, MI 48109, USA
| | - Jan C.-C. Hu
- Department of Biologic and Materials Sciences & Prosthodontics, School of Dentistry, University of Michigan, Ann Arbor, MI 48109, USA
| | - Jung-Wook Kim
- Department of Pediatric Dentistry & DRI, School of Dentistry, Seoul National University, Seoul 03080, Republic of Korea
- Department of Molecular Genetics & DRI, School of Dentistry, Seoul National University, Seoul 03080, Republic of Korea
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27
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Li F, Yu M, Fan Z, Wu J, Tian H, Feng H, Liu Y, Liu H, Han D. Rare compound heterozygous variants of LAMB3 and histological features of enamel and oral mucosa. Front Physiol 2022; 13:1006980. [PMID: 36299258 PMCID: PMC9589216 DOI: 10.3389/fphys.2022.1006980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 09/27/2022] [Indexed: 12/02/2022] Open
Abstract
Junctional epidermolysis bullosa (JEB) is a group of autosomal recessive disorders characterized by amelogenesis imperfecta (AI) and fragility of the skin and mucous membranes. The purpose of this study was to identify pathogenic gene variants and investigate the phenotypic characteristics of abnormal enamel structure and mucocutaneous lesions in a patient with JEB. Clinical examination of the patient revealed hypoplastic AI, skin lesions, and oral ulcers, whereas her parents were normal. Whole-exome sequencing (WES) and cDNA cloning identified compound heterozygous variants of LAMB3 in the proband: c.125G>C in exon 3, c.1288 + 1G>A in intron 11, and c.1348C>T in exon 12. Among these, c.125G>C was inherited from her father, and the other two variants were inherited from her mother. Functional prediction indicated that the variants might change protein structure and cause disease. Scanning electron microscopy (SEM) examination of the primary and permanent teeth revealed abnormal enamel morphology and microstructures. Hematoxylin-eosin (HE) and immunofluorescence (IF) staining showed significantly abnormal and disorganized epithelial cells in the gingival mucosa. Our results showed that this was a case of intermediate JEB1A (OMIM #226650) with autosomal recessive inheritance. The proband carried rare compound heterozygous variants of LAMB3. Our results broaden the variant spectrum of the LAMB3 gene and JEB cases. Moreover, this is the first study to identify histological malformations of the primary teeth and oral mucosa in LAMB3-related patients.
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Affiliation(s)
- Fang Li
- Third Clinical Division, Peking University School and Hospital of Stomatology and National Center of Stomatology and National Clinical Research Center for Oral Diseases and National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, China
| | - Miao Yu
- Department of Prosthodontics, Peking University School and Hospital of Stomatology and National Center of Stomatology and National Clinical Research Center for Oral Diseases and National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, China
| | - Zhuangzhuang Fan
- Department of Prosthodontics, Peking University School and Hospital of Stomatology and National Center of Stomatology and National Clinical Research Center for Oral Diseases and National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, China
| | - Junyi Wu
- Department of Prosthodontics, Peking University School and Hospital of Stomatology and National Center of Stomatology and National Clinical Research Center for Oral Diseases and National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, China
| | - Hua Tian
- Department of Cariology and Endodontology, Peking University School and Hospital of Stomatology and National Center of Stomatology and National Clinical Research Center for Oral Diseases and National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, China
| | - Hailan Feng
- Department of Prosthodontics, Peking University School and Hospital of Stomatology and National Center of Stomatology and National Clinical Research Center for Oral Diseases and National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, China
| | - Yang Liu
- Department of Prosthodontics, Peking University School and Hospital of Stomatology and National Center of Stomatology and National Clinical Research Center for Oral Diseases and National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, China
| | - Haochen Liu
- Department of Prosthodontics, Peking University School and Hospital of Stomatology and National Center of Stomatology and National Clinical Research Center for Oral Diseases and National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, China
- *Correspondence: Haochen Liu, ; Dong Han,
| | - Dong Han
- Department of Prosthodontics, Peking University School and Hospital of Stomatology and National Center of Stomatology and National Clinical Research Center for Oral Diseases and National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, China
- *Correspondence: Haochen Liu, ; Dong Han,
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El Ashry MF, Hammad IA, Abdel Raheem IM. Cast-free modified digital twin-stage technique for complete mouth rehabilitation: A dental technique. J Prosthet Dent 2022. [DOI: 10.1016/j.prosdent.2022.08.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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29
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Nouara F, Amalou G, Bouzidi A, Charif M, Charoute H, Lenaers G, El Arabi S, Bousfiha B, Barakat A. First characterization of LTBP3 variants in two Moroccan families with hypoplastic amelogenesis imperfecta. Arch Oral Biol 2022; 142:105518. [DOI: 10.1016/j.archoralbio.2022.105518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 08/02/2022] [Accepted: 08/04/2022] [Indexed: 11/02/2022]
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Tadano M, Nakamura T, Hoshikawa S, Hino R, Maruya Y, Yamada A, Fukumoto S, Saito K. The Retention Effect of Resin-Based Desensitizing Agents on Hypersensitivity-A Randomized Controlled Trial. MATERIALS 2022; 15:ma15155172. [PMID: 35897604 PMCID: PMC9330500 DOI: 10.3390/ma15155172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 07/20/2022] [Accepted: 07/22/2022] [Indexed: 11/22/2022]
Abstract
Recently, the development of dental materials has increased the availability of various hyperesthesia desensitizers. However, there are no studies on the duration of retreatment in terms of adherence rates. Thus, the adhesion rates of resin-based desensitizers were investigated. We used a conventional desensitizer and a recently developed desensitizer containing calcium salt of 4-methacryloxyethyl trimellitic acid (C-MET) and 10-methacryloyloxydecyl dihydrogen calcium phosphate (MDCP). These colored agents were applied to the surfaces of premolars and molars, and the area was measured from weekly oral photographs. Areas were statistically analyzed and mean values were calculated using 95% confidence intervals. A p-value of <0.05 was considered statistically significant. These rates were significantly higher on the buccal side of the maxilla and lower on the lingual side of the maxilla. In addition, the desensitizer containing C-MET and MDCP displayed significantly higher adhesion rates. It is suggested that this will require monthly follow-ups and reevaluation because both agents cause less than 10% adherence and there is almost no sealing effect after 4 weeks. In addition, the significantly higher adhesion rate of the desensitizer containing C-MET and MDCP indicated that the novel monomer contributed to the improvement in the adhesion ability.
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Affiliation(s)
- Manami Tadano
- Division of Pediatric Dentistry, Department of Oral Health and Development Sciences, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (M.T.); (T.N.); (S.H.); (R.H.); (Y.M.); (A.Y.); (S.F.)
| | - Tomoaki Nakamura
- Division of Pediatric Dentistry, Department of Oral Health and Development Sciences, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (M.T.); (T.N.); (S.H.); (R.H.); (Y.M.); (A.Y.); (S.F.)
| | - Seira Hoshikawa
- Division of Pediatric Dentistry, Department of Oral Health and Development Sciences, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (M.T.); (T.N.); (S.H.); (R.H.); (Y.M.); (A.Y.); (S.F.)
| | - Ryoko Hino
- Division of Pediatric Dentistry, Department of Oral Health and Development Sciences, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (M.T.); (T.N.); (S.H.); (R.H.); (Y.M.); (A.Y.); (S.F.)
| | - Yuriko Maruya
- Division of Pediatric Dentistry, Department of Oral Health and Development Sciences, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (M.T.); (T.N.); (S.H.); (R.H.); (Y.M.); (A.Y.); (S.F.)
| | - Aya Yamada
- Division of Pediatric Dentistry, Department of Oral Health and Development Sciences, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (M.T.); (T.N.); (S.H.); (R.H.); (Y.M.); (A.Y.); (S.F.)
| | - Satoshi Fukumoto
- Division of Pediatric Dentistry, Department of Oral Health and Development Sciences, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (M.T.); (T.N.); (S.H.); (R.H.); (Y.M.); (A.Y.); (S.F.)
- Section of Oral Medicine for Children, Division of Oral Health, Growth and Development, Faculty of Dental Science, Kyushu University, Fukuoka 812-8582, Japan
| | - Kan Saito
- Division of Pediatric Dentistry, Department of Oral Health and Development Sciences, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (M.T.); (T.N.); (S.H.); (R.H.); (Y.M.); (A.Y.); (S.F.)
- Correspondence: ; Tel./Fax: +81-22-717-8382
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Azpiazu-Flores FX, Knobloch LA, Larsen PE. Interdisciplinary Management of a Patient with Dentinogenesis Imperfecta Type II Using a Combination of CAD-CAM and Analog Techniques: A Clinical Report. J Prosthodont 2022; 31:647-654. [PMID: 35675448 DOI: 10.1111/jopr.13556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 05/29/2022] [Indexed: 11/29/2022] Open
Abstract
Type II dentinogenesis imperfecta is an autosomal dominant condition that affects dentin which increases the complexity of the predictability of restorative treatment. Computer-aided design and computer-aided manufacturing (CAD-CAM) technologies permit the creation of highly accurate devices and dental prostheses that simplify the planning and execution of advanced implant surgery and full-mouth rehabilitation. This clinical report presents the interdisciplinary management of a 20-year-old male with dentinogenesis imperfecta type II. In this article, a combination of analog and CAD-CAM technologies were used to fabricate devices that aided planning, assisted intermaxillary fixation and implant placement, served as interim prostheses, and permitted the accurate establishment of esthetics and occlusion of the definitive full-arch prostheses.
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Affiliation(s)
- Francisco X Azpiazu-Flores
- Advanced Prosthodontics Program, The Ohio State University College of Dentistry, Columbus, OH.,Department of Restorative Dentistry, Dr. Gerald Niznick College of Dentistry, University of Manitoba, Winnipeg, Canada
| | - Lisa A Knobloch
- Division of Restorative and Prosthetic Dentistry, The Ohio State University College of Dentistry, Columbus, OH
| | - Peter E Larsen
- Division of Oral and Maxillofacial Surgery and Anesthesiology, The Ohio State University College of Dentistry, Columbus, OH
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32
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Dadarwal A, Paliwal J, Sharma V, Jaswal S, Meena R. Full Mouth Rehabilitation Using the Twin Stage Procedure in a Patient with Amelogenesis Imperfecta: A Case Report. Cureus 2022; 14:e25512. [PMID: 35800841 PMCID: PMC9246441 DOI: 10.7759/cureus.25512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/31/2022] [Indexed: 11/16/2022] Open
Abstract
Amelogenesis imperfecta (AI) refers to a group of inherited odontological disorders that alter enamel formation. The AI variant is based on the primary enamel defect, classified as hypoplastic type I, hypo maturation type II, hypo calcification type III, and hypo maturation type IV. AI is commonly linked with the loss of the normal occlusal plane, the loss of the vertical dimension of occlusion (VDO), and impaired functions and esthetics. This case report describes the Hobo and Takayama twin-stage procedure for the rehabilitation of a patient with hypoplastic AI.
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33
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The Modified Shields Classification and 12 Families with Defined DSPP Mutations. Genes (Basel) 2022; 13:genes13050858. [PMID: 35627243 PMCID: PMC9141616 DOI: 10.3390/genes13050858] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 04/28/2022] [Accepted: 05/03/2022] [Indexed: 12/14/2022] Open
Abstract
Mutations in Dentin Sialophosphoprotein (DSPP) are known to cause, in order of increasing severity, dentin dysplasia type-II (DD-II), dentinogenesis imperfecta type-II (DGI-II), and dentinogenesis imperfecta type-III (DGI-III). DSPP mutations fall into two groups: a 5′-group that affects protein targeting and a 3′-group that shifts translation into the −1 reading frame. Using whole-exome sequence (WES) analyses and Single Molecule Real-Time (SMRT) sequencing, we identified disease-causing DSPP mutations in 12 families. Three of the mutations are novel: c.53T>C/p.(Val18Ala); c.3461delG/p.(Ser1154Metfs*160); and c.3700delA/p.(Ser1234Alafs*80). We propose genetic analysis start with WES analysis of proband DNA to identify mutations in COL1A1 and COL1A2 causing dominant forms of osteogenesis imperfecta, 5′-DSPP mutations, and 3′-DSPP frameshifts near the margins of the DSPP repeat region, and SMRT sequencing when the disease-causing mutation is not identified. After reviewing the literature and incorporating new information showing distinct differences in the cell pathology observed between knockin mice with 5′-Dspp or 3′-Dspp mutations, we propose a modified Shields Classification based upon the causative mutation rather than phenotypic severity such that patients identified with 5′-DSPP defects be diagnosed as DGI-III, while those with 3′-DSPP defects be diagnosed as DGI-II.
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Mascarell S, Citterio H, Martiano V, Friedlander L. Full‐mouth rehabilitation choices depending on amelogenesis imperfecta's type: A familial case report. Clin Case Rep 2022; 10:e05459. [PMID: 35425608 PMCID: PMC8991759 DOI: 10.1002/ccr3.5459] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 02/05/2022] [Accepted: 02/06/2022] [Indexed: 11/17/2022] Open
Abstract
Amelogenesis imperfecta, a rare disease, represents inherited, congenital defects that primarily affect enamel with esthetic and functional impairment affecting everyday life. We present oral rehabilitation of a mother and her son, respectively, suffering from an hypoplastic and an hypocalcified form of AI.
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Affiliation(s)
- Salomé Mascarell
- AP‐HPGroupe Hospitalier Pitié‐Salpêtrière Charles Foix Paris France
- Department of Prosthodontics Université de Paris Paris France
| | - Hélène Citterio
- AP‐HPGroupe Hospitalier Pitié‐Salpêtrière Charles Foix Paris France
- Department of Prosthodontics Université de Paris Paris France
| | - Victor Martiano
- AP‐HPGroupe Hospitalier Pitié‐Salpêtrière Charles Foix Paris France
- Department of Prosthodontics Université de Paris Paris France
| | - Lisa Friedlander
- AP‐HPGroupe Hospitalier Pitié‐Salpêtrière Charles Foix Paris France
- Department of Prosthodontics Université de Paris Paris France
- Filiere Maladie Rare TETECOUORARES Competence Centre for Rare Oral and Dental Diseases Paris France
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35
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Bai RQ, He WB, Peng Q, Shen SH, Yu QQ, Du J, Tan YQ, Wang YH, Liu BJ. A novel FAM83H variant causes familial amelogenesis imperfecta with incomplete penetrance. Mol Genet Genomic Med 2022; 10:e1902. [PMID: 35212465 PMCID: PMC9000937 DOI: 10.1002/mgg3.1902] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 01/14/2022] [Accepted: 01/31/2022] [Indexed: 11/26/2022] Open
Abstract
Background Amelogenesis imperfecta (AI) is known to be a monogenic genetic disease caused by a variety of genes demonstrating a wide spectrum of penetrance. FAM83H is reported to be involved in AI: however, whether FAM83H causes AI with incomplete penetrance is unclear. Methods Whole‐exome sequencing was performed on two patients with AI, and putative disease‐related variants were validated by Sanger sequencing. Bioinformatic and in vitro functional analyses were performed to functionally characterize the identified disease‐causing variants. Results We identified a novel heterozygous nonsense variant of FAM83H (NM_198488: c.1975G > T, p.Glu659Ter); in vitro functional analysis showed that this mutant produced mislocalized proteins and was deleterious. Surprisingly, the clinical manifestations of each of the six individuals carrying this variant were different, with one carrier appearing to be completely asymptomatic for AI. Conclusion Our findings expand the variant spectrum for FAM83H and the phenotypic spectrum for FAM83H‐associated AI and suggest that FAM83H‐mediated AI exhibits incomplete penetrance.
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Affiliation(s)
- Rui-Qi Bai
- Hunan Key Laboratory of Oral Health Research & Hunan 3D Printing Engineering Research Center of Oral Care & Hunan Clinical Research Center of Oral Major Diseases and Oral Health & Xiangya Stomatological Hospital & Xiangya School of Stomatology, Central South University, Changsha, Hunan, People's Republic of China
| | - Wen-Bin He
- National Engineering and Research Center of Human Stem Cells, Changsha Hunan, People's Republic of China.,Institute of Reproductive and Stem Cell Engineering, NHC Key Laboratory of Human Stem Cell and Reproductive Engineering, School of Basic Medical Science, Central South University, Changsha, China.,Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, China.,Hunan International Scientific and Technological Cooperation base of Development and carcinogenesis, Changsha, China
| | - Qian Peng
- Hunan Key Laboratory of Oral Health Research & Hunan 3D Printing Engineering Research Center of Oral Care & Hunan Clinical Research Center of Oral Major Diseases and Oral Health & Xiangya Stomatological Hospital & Xiangya School of Stomatology, Central South University, Changsha, Hunan, People's Republic of China
| | - Su-Hui Shen
- Hunan Key Laboratory of Oral Health Research & Hunan 3D Printing Engineering Research Center of Oral Care & Hunan Clinical Research Center of Oral Major Diseases and Oral Health & Xiangya Stomatological Hospital & Xiangya School of Stomatology, Central South University, Changsha, Hunan, People's Republic of China
| | - Qian-Qian Yu
- Hunan Key Laboratory of Oral Health Research & Hunan 3D Printing Engineering Research Center of Oral Care & Hunan Clinical Research Center of Oral Major Diseases and Oral Health & Xiangya Stomatological Hospital & Xiangya School of Stomatology, Central South University, Changsha, Hunan, People's Republic of China
| | - Juan Du
- National Engineering and Research Center of Human Stem Cells, Changsha Hunan, People's Republic of China.,Institute of Reproductive and Stem Cell Engineering, NHC Key Laboratory of Human Stem Cell and Reproductive Engineering, School of Basic Medical Science, Central South University, Changsha, China.,Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, China.,Hunan International Scientific and Technological Cooperation base of Development and carcinogenesis, Changsha, China
| | - Yue-Qiu Tan
- National Engineering and Research Center of Human Stem Cells, Changsha Hunan, People's Republic of China.,Institute of Reproductive and Stem Cell Engineering, NHC Key Laboratory of Human Stem Cell and Reproductive Engineering, School of Basic Medical Science, Central South University, Changsha, China.,Clinical Research Center for Reproduction and Genetics in Hunan Province, Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, China.,Hunan International Scientific and Technological Cooperation base of Development and carcinogenesis, Changsha, China
| | - Yue-Hong Wang
- Hunan Key Laboratory of Oral Health Research & Hunan 3D Printing Engineering Research Center of Oral Care & Hunan Clinical Research Center of Oral Major Diseases and Oral Health & Xiangya Stomatological Hospital & Xiangya School of Stomatology, Central South University, Changsha, Hunan, People's Republic of China
| | - Bin-Jie Liu
- Hunan Key Laboratory of Oral Health Research & Hunan 3D Printing Engineering Research Center of Oral Care & Hunan Clinical Research Center of Oral Major Diseases and Oral Health & Xiangya Stomatological Hospital & Xiangya School of Stomatology, Central South University, Changsha, Hunan, People's Republic of China
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36
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Suzuki A, Yoshioka H, Liu T, Gull A, Singh N, Le T, Zhao Z, Iwata J. Crucial Roles of microRNA-16-5p and microRNA-27b-3p in Ameloblast Differentiation Through Regulation of Genes Associated With Amelogenesis Imperfecta. Front Genet 2022; 13:788259. [PMID: 35401675 PMCID: PMC8990915 DOI: 10.3389/fgene.2022.788259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Accepted: 03/11/2022] [Indexed: 11/13/2022] Open
Abstract
Amelogenesis imperfecta is a congenital disorder within a heterogeneous group of conditions characterized by enamel hypoplasia. Patients suffer from early tooth loss, social embarrassment, eating difficulties, and pain due to an abnormally thin, soft, fragile, and discolored enamel with poor aesthetics and functionality. The etiology of amelogenesis imperfecta is complicated by genetic interactions. To identify mouse amelogenesis imperfecta-related genes (mAIGenes) and their respective phenotypes, we conducted a systematic literature review and database search and found and curated 70 mAIGenes across all of the databases. Our pathway enrichment analysis indicated that these genes were enriched in tooth development-associated pathways, forming four distinct groups. To explore how these genes are regulated and affect the phenotype, we predicted microRNA (miRNA)-gene interaction pairs using our bioinformatics pipeline. Our miRNA regulatory network analysis pinpointed that miR-16-5p, miR-27b-3p, and miR-23a/b-3p were hub miRNAs. The function of these hub miRNAs was evaluated through ameloblast differentiation assays with/without the candidate miRNA mimics using cultured mouse ameloblast cells. Our results revealed that overexpression of miR-16-5p and miR-27b-3p, but not miR-23a/b-3p, significantly inhibited ameloblast differentiation through regulation of mAIGenes. Thus, our study shows that miR-16-5p and miR-27b-3p are candidate pathogenic miRNAs for amelogenesis imperfecta.
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Affiliation(s)
- Akiko Suzuki
- Department of Diagnostic and Biomedical Sciences, School of Dentistry, The University of Texas Health Science Center at Houston, Houston, TX, United States
- Center for Craniofacial Research, The University of Texas Health Science Center at Houston, Houston, TX, United States
| | - Hiroki Yoshioka
- Department of Diagnostic and Biomedical Sciences, School of Dentistry, The University of Texas Health Science Center at Houston, Houston, TX, United States
- Center for Craniofacial Research, The University of Texas Health Science Center at Houston, Houston, TX, United States
| | - Teng Liu
- Center for Precision Health, School of Biomedical Informatics, The University of Texas Health Science Center at Houston, Houston, TX, United States
| | - Aania Gull
- Department of Diagnostic and Biomedical Sciences, School of Dentistry, The University of Texas Health Science Center at Houston, Houston, TX, United States
- Center for Craniofacial Research, The University of Texas Health Science Center at Houston, Houston, TX, United States
| | - Naina Singh
- Center for Craniofacial Research, The University of Texas Health Science Center at Houston, Houston, TX, United States
| | - Thanh Le
- Department of Diagnostic and Biomedical Sciences, School of Dentistry, The University of Texas Health Science Center at Houston, Houston, TX, United States
- Center for Craniofacial Research, The University of Texas Health Science Center at Houston, Houston, TX, United States
| | - Zhongming Zhao
- Center for Precision Health, School of Biomedical Informatics, The University of Texas Health Science Center at Houston, Houston, TX, United States
- Human Genetics Center, School of Public Health, The University of Texas Health Science Center at Houston, Houston, TX, United States
- MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, Houston, TX, United States
| | - Junichi Iwata
- Department of Diagnostic and Biomedical Sciences, School of Dentistry, The University of Texas Health Science Center at Houston, Houston, TX, United States
- Center for Craniofacial Research, The University of Texas Health Science Center at Houston, Houston, TX, United States
- MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, Houston, TX, United States
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37
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Identification of a Novel FAM83H Mutation and Management of Hypocalcified Amelogenesis Imperfecta in Early Childhood. CHILDREN (BASEL, SWITZERLAND) 2022; 9:children9030429. [PMID: 35327801 PMCID: PMC8947619 DOI: 10.3390/children9030429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 03/15/2022] [Accepted: 03/17/2022] [Indexed: 11/23/2022]
Abstract
Amelogenesis imperfecta (AI) is a heterogeneous group of rare genetic disorders affecting amelogenesis during dental development. Therefore, the molecular genetic etiology of AI can provide information about the nature and progress of the disease. To confirm the genetic etiology of AI in a Korean family with an autosomal dominant inheritance, pedigree and mutational analyses were performed. DNA was isolated from the participating family members and whole-exome sequencing was performed with the DNA sample of the father of the proband. The identified mutation was confirmed by Sanger sequencing. The mutational analysis revealed a novel nonsense mutation in the FAM83H gene (NM_198488.5: c.1363C > T, p.(Gln455*)), confirming autosomal dominant hypocalcified AI. Full-mouth restorative treatments of the affected children were performed after the completion of the deciduous dentition. Early diagnosis of AI can be useful for understanding the nature of the disease and for managing the condition and treatment planning.
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Husein D, Alamoudi A, Ohyama Y, Mochida H, Ritter B, Mochida Y. Identification of the C-terminal region in Amelogenesis Imperfecta causative protein WDR72 required for Golgi localization. Sci Rep 2022; 12:4640. [PMID: 35301423 PMCID: PMC8930991 DOI: 10.1038/s41598-022-08719-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 02/28/2022] [Indexed: 11/22/2022] Open
Abstract
Amelogenesis Imperfecta (AI) represents a group of hereditary conditions that manifest tooth enamel defects. Several causative mutations in the WDR72 gene have been identified and patients with WDR72 mutations have brown (or orange-brown) discolored enamel, rough enamel surface, early loss of enamel after tooth eruption, and severe attrition. Although the molecular function of WDR72 is not yet fully understood, a recent study suggested that WDR72 could be a facilitator of endocytic vesicle trafficking, which appears inconsistent with the previously reported cytoplasmic localization of WDR72. Therefore, the aims of our study were to investigate the tissues and cell lines in which WDR72 was expressed and to further determine the sub-cellular localization of WDR72. The expression of Wdr72 gene was investigated in mouse tissues and cell lines. Endogenous WDR72 protein was detected in the membranous fraction of ameloblast cell lines in addition to the cytosolic fraction. Sub-cellular localization studies supported our fractionation data, showing WDR72 at the Golgi apparatus, and to a lesser extent, in the cytoplasmic area. In contrast, a WDR72 AI mutant form that lacks its C-terminal region was exclusively detected in the cytoplasm. In addition, our studies identified a putative prenylation/CAAX motif within the last four amino acids of human WDR72 and generated a WDR72 variant, called CS mutant, in which the putative motif was ablated by a point mutation. Interestingly, mutation of the putative CAAX motif impaired WDR72 recruitment to the Golgi. Cell fractionation assays confirmed subcellular distribution of wild-type WDR72 in both cytosolic and membranous fractions, while the WDR72 AI mutant and CS mutant forms were predominantly detected in the cytosolic fraction. Our studies provide new insights into the subcellular localization of WDR72 and demonstrate a critical role for the C-terminal CAAX motif in regulating WDR72 recruitment to the Golgi. In accordance with structural modelling studies that classified WDR72 as a potential vesicle transport protein, our findings suggest a role for WDR72 in vesicular Golgi transport that may be key to understanding the underlying cause of AI.
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Affiliation(s)
- Dina Husein
- Department of Molecular and Cell Biology, Henry M. Goldman School of Dental Medicine, Boston University, Boston, MA, USA
| | - Ahmed Alamoudi
- Department of Molecular and Cell Biology, Henry M. Goldman School of Dental Medicine, Boston University, Boston, MA, USA
- Oral Biology Department, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Yoshio Ohyama
- Department of Molecular and Cell Biology, Henry M. Goldman School of Dental Medicine, Boston University, Boston, MA, USA
| | - Hanna Mochida
- Department of Molecular and Cell Biology, Henry M. Goldman School of Dental Medicine, Boston University, Boston, MA, USA
| | - Brigitte Ritter
- Department of Biochemistry, School of Medicine, Boston University, Boston, MA, USA
| | - Yoshiyuki Mochida
- Department of Molecular and Cell Biology, Henry M. Goldman School of Dental Medicine, Boston University, Boston, MA, USA.
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39
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Alvarez C, Aragón MA, Lee Y, Gutiérrez S, Méndez P, García DA, Otero L, Kim JW. A Recurrent FAM83H Mutation in an Extended Colombian Family and Variable Craniofacial Phenotypes. CHILDREN (BASEL, SWITZERLAND) 2022; 9:children9030362. [PMID: 35327733 PMCID: PMC8947040 DOI: 10.3390/children9030362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 02/22/2022] [Accepted: 03/01/2022] [Indexed: 11/16/2022]
Abstract
Amelogenesis imperfecta (AI) is a collection of rare genetic disorders affecting the quantity and/or quality of the tooth enamel. AI can be classified into three major types according to the clinical phenotype: hypoplastic, hypocalcified, and hypomatured. Among them, the hypocalcified type shows the weakest physical properties, leaving rough and discolored enamel surfaces after tooth eruption. To date, mutations in the FAM83H gene are responsible for the autosomal-dominant hypocalcified AI. In this study, we recruited a four-generation Colombian family with hypocalcified AI and identified a recurrent nonsense mutation in the FAM83H gene (NM_198488.5:c.1289C>A, p.(Ser430 *)) by candidate gene sequencing. Cephalometric analyses revealed the anterior open bite that occurred in the proband is not correlated with the AI in this family.
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Affiliation(s)
- Camila Alvarez
- Pediatric Dentist Residency Program, Faculty of Dentistry, Pontifical Xavierian University, Bogota 110231, Colombia; (C.A.); (M.A.A.); (P.M.)
| | - María Andrea Aragón
- Pediatric Dentist Residency Program, Faculty of Dentistry, Pontifical Xavierian University, Bogota 110231, Colombia; (C.A.); (M.A.A.); (P.M.)
| | - Yejin Lee
- Department of Pediatric Dentistry, School of Dentistry & DRI, Seoul National University, Seoul 03080, Korea;
| | - Sandra Gutiérrez
- Center of Dental Research, Pontifical Xavierian University, Bogota 110231, Colombia; (S.G.); (D.A.G.)
| | - Patricia Méndez
- Pediatric Dentist Residency Program, Faculty of Dentistry, Pontifical Xavierian University, Bogota 110231, Colombia; (C.A.); (M.A.A.); (P.M.)
| | - Dabeiba Adriana García
- Center of Dental Research, Pontifical Xavierian University, Bogota 110231, Colombia; (S.G.); (D.A.G.)
| | - Liliana Otero
- Center of Dental Research, Pontifical Xavierian University, Bogota 110231, Colombia; (S.G.); (D.A.G.)
- Correspondence: (L.O.); (J.-W.K.)
| | - Jung-Wook Kim
- Department of Pediatric Dentistry, School of Dentistry & DRI, Seoul National University, Seoul 03080, Korea;
- Department of Molecular Genetics, School of Dentistry & DRI, Seoul National University, Seoul 03080, Korea
- Correspondence: (L.O.); (J.-W.K.)
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40
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Choi H, Lee K, Kim D, Kim S, Lee JH. The implication of holocytochrome c synthase mutation in Korean familial hypoplastic amelogenesis imperfecta. Clin Oral Investig 2022; 26:4487-4498. [PMID: 35243551 PMCID: PMC9203382 DOI: 10.1007/s00784-022-04413-0] [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: 12/17/2021] [Accepted: 02/15/2022] [Indexed: 11/18/2022]
Abstract
Objectives This study aimed to comprehensively characterise genetic variants of amelogenesis imperfecta in a single Korean family through whole-exome sequencing and bioinformatics analysis. Material and methods Thirty-one individuals of a Korean family, 9 of whom were affected and 22 unaffected by amelogenesis imperfecta, were enrolled. Whole-exome sequencing was performed on 12 saliva samples, including samples from 8 affected and 4 unaffected individuals. The possible candidate genes associated with the disease were screened by segregation analysis and variant filtering. In silico mutation impact analysis was then performed on the filtered variants based on sequence conservation and protein structure. Results Whole-exome sequencing data revealed an X-linked dominant, heterozygous genomic missense mutation in the mitochondrial gene holocytochrome c synthase (HCCS). We also found that HCCS is potentially related to the role of mitochondria in amelogenesis. The HCCS variant was expected to be deleterious in both evolution-based and large population-based analyses. Further, the variant was predicted to have a negative effect on catalytic function of HCCS by in silico analysis of protein structure. In addition, HCCS had significant association with amelogenesis in literature mining analysis. Conclusions These findings suggest new evidence for the relationship between amelogenesis and mitochondria function, which could be implicated in the pathogenesis of amelogenesis imperfecta. Clinical relevance The discovery of HCCS mutations and a deeper understanding of the pathogenesis of amelogenesis imperfecta could lead to finding solutions for the fundamental treatment of this disease. Furthermore, it enables dental practitioners to establish predictable prosthetic treatment plans at an early stage by early detection of amelogenesis imperfecta through personalised medicine. Supplementary Information The online version contains supplementary material available at 10.1007/s00784-022-04413-0.
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Affiliation(s)
- Hyejin Choi
- Department of Prosthodontics, College of Dentistry at Yonsei University, 50-1 Yonsei-ro, Seodaemoon-gu, Seoul, 120-752, Republic of Korea
| | - Kwanghwan Lee
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, 790-784, Republic of Korea
| | - Donghyo Kim
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, 790-784, Republic of Korea
| | - Sanguk Kim
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, 790-784, Republic of Korea.
| | - Jae Hoon Lee
- Department of Prosthodontics, College of Dentistry at Yonsei University, 50-1 Yonsei-ro, Seodaemoon-gu, Seoul, 120-752, Republic of Korea.
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Lee Y, Zhang H, Seymen F, Kim YJ, Kasimoglu Y, Koruyucu M, Simmer JP, Hu JCC, Kim JW. Novel KLK4 Mutations Cause Hypomaturation Amelogenesis Imperfecta. J Pers Med 2022; 12:jpm12020150. [PMID: 35207639 PMCID: PMC8878363 DOI: 10.3390/jpm12020150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 01/18/2022] [Accepted: 01/20/2022] [Indexed: 12/02/2022] Open
Abstract
Amelogenesis imperfecta (AI) is a group of rare genetic diseases affecting the tooth enamel. AI is characterized by an inadequate quantity and/or quality of tooth enamel and can be divided into three major categories: hypoplastic, hypocalcified and hypomaturation types. Even though there are some overlapping phenotypes, hypomaturation AI enamel typically has a yellow to brown discoloration with a dull appearance but a normal thickness indicating a less mineralized enamel matrix. In this study, we recruited four Turkish families with hypomaturation AI and performed mutational analysis using whole exome sequencing. These analyses revealed two novel homozygous mutations in the KLK4 gene: a nonsense mutation in exon 3 (NM_004917.4:c.170C>A, p.(Ser57*)) was found in families 1, 2 and 3 and a missense mutation in exon 6 (c.637T>C, p.(Cys213Arg)) in family 4. Functional analysis showed that the missense mutation transcript could not translate the mutant protein efficiently or generated an unstable protein that lacked functional activity. The two novel inactivating KLK4 mutations we identified caused a hypomaturation AI phenotype similar to those caused by the four previously described KLK4 nonsense and frameshift mutations. This study improves our understanding of the normal and pathologic mechanisms of enamel formation.
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Affiliation(s)
- Yejin Lee
- Department of Pediatric Dentistry, School of Dentistry & DRI, Seoul National University, Seoul 03080, Korea; (Y.L.); (Y.J.K.)
| | - Hong Zhang
- Department of Biologic and Materials Sciences & Prosthodontics, School of Dentistry, University of Michigan, Ann Arbor, MI 48109, USA; (H.Z.); (J.P.S.); (J.C.-C.H.)
| | - Figen Seymen
- Department of Pedodontics, Faculty of Dentistry, Istanbul University, Istanbul 34116, Turkey; (F.S.); (Y.K.); (M.K.)
| | - Youn Jung Kim
- Department of Pediatric Dentistry, School of Dentistry & DRI, Seoul National University, Seoul 03080, Korea; (Y.L.); (Y.J.K.)
| | - Yelda Kasimoglu
- Department of Pedodontics, Faculty of Dentistry, Istanbul University, Istanbul 34116, Turkey; (F.S.); (Y.K.); (M.K.)
| | - Mine Koruyucu
- Department of Pedodontics, Faculty of Dentistry, Istanbul University, Istanbul 34116, Turkey; (F.S.); (Y.K.); (M.K.)
| | - James P. Simmer
- Department of Biologic and Materials Sciences & Prosthodontics, School of Dentistry, University of Michigan, Ann Arbor, MI 48109, USA; (H.Z.); (J.P.S.); (J.C.-C.H.)
| | - Jan C.-C. Hu
- Department of Biologic and Materials Sciences & Prosthodontics, School of Dentistry, University of Michigan, Ann Arbor, MI 48109, USA; (H.Z.); (J.P.S.); (J.C.-C.H.)
| | - Jung-Wook Kim
- Department of Pediatric Dentistry, School of Dentistry & DRI, Seoul National University, Seoul 03080, Korea; (Y.L.); (Y.J.K.)
- Department of Molecular Genetics, School of Dentistry & DRI, Seoul National University, Seoul 03080, Korea
- Correspondence:
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Masoud AI, Tsay TP. Multiloop edgewise archwire treatment for a patient with a severe anterior open bite and amelogenesis imperfecta. Angle Orthod 2022; 92:137-147. [PMID: 34533566 DOI: 10.2319/032221-228.1] [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: 03/01/2021] [Accepted: 07/01/2021] [Indexed: 11/23/2022] Open
Abstract
Amelogenesis imperfecta is a rare hereditary disorder that affects dental enamel and is often associated with an anterior open bite. Orthodontic treatment of a 16-year-old female patient with hypocalcified amelogenesis imperfecta and a 9-mm anterior open bite was presented. Radiographic examination revealed a steep mandibular plane angle, an increased lower face height, a Class II skeletal pattern, and a convex profile. Additionally, the patient had stainless steel crowns on all upper and lower posterior teeth and composite veneers on the upper anterior teeth. The patient was treated nonsurgically using a multiloop edgewise archwire (MEAW). MEAW mechanics allowed for successful correction of the anterior open bite, with significant reduction in the mandibular plane angle and improvement in the patient's profile. No fixed retainers were used, and the results remained stable 78 months after removal of orthodontic appliances. MEAW mechanics should be considered for patients with large anterior open bites, although this technique requires excellent patient compliance.
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Appelstrand SB, Robertson A, Sabel N. Patient-reported outcome measures in individuals with amelogenesis imperfecta: a systematic review. Eur Arch Paediatr Dent 2022; 23:885-895. [PMID: 35896941 PMCID: PMC9750902 DOI: 10.1007/s40368-022-00737-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Accepted: 07/13/2022] [Indexed: 10/16/2022]
Abstract
PURPOSE Amelogenesis imperfecta (AI) is a hereditary condition which affects the composition and structure of enamel in terms of hypoplasia and/or hypomineralization. The condition severely affects patients facing such difficulties as hypersensibility, loss of tooth substance and poor aesthetics. The objective is to perform a systematic review of patient-reported outcome measures (PROMs) in patients with amelogenesis imperfecta. METHODS Inclusion criteria were articles written in English, including PROMs from patients with amelogenesis imperfecta. The databases PubMed, Scopus and Web of Science were searched on April 27, 2022, and eligible articles were screened. Exclusion criteria were articles based on proxy reports and single case reports. RESULTS 405 studies were screened in terms of title and abstract, with 31 articles eligible for full-text screening, resulting in a total of 11 articles eligible for inclusion, (articles including 4-82 patients). The content was analyzed, resulting in the outcome divided into seven domains: Oral Health-Related Quality of Life (OHRQoL), Dental fear, Esthetics, Psychosocial factors, Function, Dental hypersensitivity, and Treatment outcome. CONCLUSION The limited quantity of research on PROMS from patients with AI indicates a significant impact of OHRQoL and daily life. A large variety of approaches have been presented in the articles. Patients report concerns of esthetics, hypersensitivity, function, and a general impact on well-being and social interaction. This highlights the importance for the need of early dental treatment. PROSPERO REGISTRATION NUMBER 256875.
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Affiliation(s)
- S. B. Appelstrand
- Public Dental Service, Region Västra Götaland, Västra Götaland, Sweden
| | - A. Robertson
- grid.8761.80000 0000 9919 9582Department of Pediatric Dentistry, Institute of Odontology, Sahlgrenska Academy, University of Gothenburg, Göteborg, Sweden
| | - N. Sabel
- grid.8761.80000 0000 9919 9582Department of Pediatric Dentistry, Institute of Odontology, Sahlgrenska Academy, University of Gothenburg, Göteborg, Sweden
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44
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Developmental Defects of the Teeth and Their Hard Tissues. Pediatr Dent 2022. [DOI: 10.1007/978-3-030-78003-6_17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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45
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Seymen F, Zhang H, Kasimoglu Y, Koruyucu M, Simmer JP, Hu JCC, Kim JW. Novel Mutations in GPR68 and SLC24A4 Cause Hypomaturation Amelogenesis Imperfecta. J Pers Med 2021; 12:jpm12010013. [PMID: 35055328 PMCID: PMC8781920 DOI: 10.3390/jpm12010013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Revised: 12/15/2021] [Accepted: 12/20/2021] [Indexed: 11/16/2022] Open
Abstract
Amelogenesis imperfecta (AI) is a rare genetic condition affecting the quantity and/or quality of tooth enamel. Hypomaturation AI is characterized by brownish-yellow discoloration with increased opacity and poorly mineralized enamel prone to fracture and attrition. We recruited three families affected by hypomaturation AI and performed whole exome sequencing with selected individuals in each family. Bioinformatic analysis and Sanger sequencing identified and confirmed mutations and segregation in the families. Family 1 had a novel homozygous frameshift mutation in GPR68 gene (NM_003485.3:c.78_83delinsC, p.(Val27Cysfs*146)). Family 2 had a novel homozygous nonsense mutation in SLC24A4 gene (NM_153646.4:c.613C>T, NP_705932.2:p.(Arg205*)). Family 3 also had a homozygous missense mutation in SLC24A4 gene which was reported previously (c.437C>T, p.(Ala146Val)). This report not only expands the mutational spectrum of the AI-causing genes but also improves our understanding of normal and pathologic amelogenesis.
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Affiliation(s)
- Figen Seymen
- Department of Pedodontics, Faculty of Dentistry, Istanbul University, Istanbul 34116, Turkey; (F.S.); (Y.K.); (M.K.)
| | - Hong Zhang
- Department of Biologic and Materials Sciences & Prosthodontics, School of Dentistry, University of Michigan, Ann Arbor, MI 48109, USA; (H.Z.); (J.P.S.); (J.C.-C.H.)
| | - Yelda Kasimoglu
- Department of Pedodontics, Faculty of Dentistry, Istanbul University, Istanbul 34116, Turkey; (F.S.); (Y.K.); (M.K.)
| | - Mine Koruyucu
- Department of Pedodontics, Faculty of Dentistry, Istanbul University, Istanbul 34116, Turkey; (F.S.); (Y.K.); (M.K.)
| | - James P. Simmer
- Department of Biologic and Materials Sciences & Prosthodontics, School of Dentistry, University of Michigan, Ann Arbor, MI 48109, USA; (H.Z.); (J.P.S.); (J.C.-C.H.)
| | - Jan C.-C. Hu
- Department of Biologic and Materials Sciences & Prosthodontics, School of Dentistry, University of Michigan, Ann Arbor, MI 48109, USA; (H.Z.); (J.P.S.); (J.C.-C.H.)
| | - Jung-Wook Kim
- Department of Pediatric Dentistry, School of Dentistry & DRI, Seoul National University, Seoul 03080, Korea
- Department of Molecular Genetics, School of Dentistry & DRI, Seoul National University, Seoul 03080, Korea
- Correspondence:
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Le Cabec A, Colard T, Charabidze D, Chaussain C, Di Carlo G, Gaudzinski-Windheuser S, Hublin JJ, Melis RT, Pioli L, Ramirez-Rozzi F, Mussi M. Insights into the palaeobiology of an early Homo infant: multidisciplinary investigation of the GAR IVE hemi-mandible, Melka Kunture, Ethiopia. Sci Rep 2021; 11:23087. [PMID: 34845260 PMCID: PMC8630034 DOI: 10.1038/s41598-021-02462-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Accepted: 10/01/2021] [Indexed: 12/02/2022] Open
Abstract
Childhood is an ontogenetic stage unique to the modern human life history pattern. It enables the still dependent infants to achieve an extended rapid brain growth, slow somatic maturation, while benefitting from provisioning, transitional feeding, and protection from other group members. This tipping point in the evolution of human ontogeny likely emerged from early Homo. The GAR IVE hemi-mandible (1.8 Ma, Melka Kunture, Ethiopia) represents one of the rarely preserved early Homo infants (~ 3 years at death), recovered in a richly documented Oldowan archaeological context. Yet, based on the sole external inspection of its teeth, GAR IVE was diagnosed with a rare genetic disease-amelogenesis imperfecta (AI)-altering enamel. Since it may have impacted the child's survival, this diagnosis deserves deeper examination. Here, we reassess and refute this diagnosis and all associated interpretations, using an unprecedented multidisciplinary approach combining an in-depth analysis of GAR IVE (synchrotron imaging) and associated fauna. Some of the traits previously considered as diagnostic of AI can be better explained by normal growth or taphonomy, which calls for caution when diagnosing pathologies on fossils. We compare GAR IVE's dental development to other fossil hominins, and discuss the implications for the emergence of childhood in early Homo.
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Affiliation(s)
- Adeline Le Cabec
- Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103, Leipzig, Germany. .,Univ. Bordeaux, CNRS, MCC, PACEA, UMR 5199, 33600, Pessac, France.
| | - Thomas Colard
- grid.410463.40000 0004 0471 8845Department of Orthodontics, University of Lille, Lille University Hospital, 59000 Lille, France
| | - Damien Charabidze
- grid.503422.20000 0001 2242 6780UMR 8025, Centre d’Histoire Judiciaire, University of Lille, 59000 Lille, France
| | - Catherine Chaussain
- grid.508487.60000 0004 7885 7602UR 2496 Orofacial Pathologies, Imaging and Biotherapies. Dental School Université de Paris, AP-HP- Hôpital Bretonneau - Service Odontologie CRMR Métabolisme du Phosphore et du Calcium (OSCAR, ERN Bond), Paris, France
| | - Gabriele Di Carlo
- grid.7841.aDepartment of Oral and Maxillofacial Sciences, Unit of Pediatric Dentistry, Sapienza University of Rome, Rome, Italy
| | - Sabine Gaudzinski-Windheuser
- grid.461784.80000 0001 2181 3201MONREPOS Archaeological Research Centre and Museum for Human Behavioural Evolution, Römisch-Germanisches Zentralmuseum, Leibniz-Forschungsinstitut Für Archäologie and Institute of Ancient Studies, Johannes Gutenberg–University Mainz, Schloss Monrepos, 56567 Neuwied, Germany
| | - Jean-Jacques Hublin
- grid.419518.00000 0001 2159 1813Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103 Leipzig, Germany
| | - Rita T. Melis
- Italian Archaeological Mission at Melka Kunture and Balchit, Rome, Italy ,grid.7763.50000 0004 1755 3242Dipartimento Di Scienze Chimiche E Geologiche, Università Degli Studi Di Cagliari, Cittadella Universitaria, 09042 Monserrato (CA), Italy
| | - Laura Pioli
- grid.7763.50000 0004 1755 3242Dipartimento Di Scienze Chimiche E Geologiche, Università Degli Studi Di Cagliari, Cittadella Universitaria, 09042 Monserrato (CA), Italy
| | - Fernando Ramirez-Rozzi
- grid.508487.60000 0004 7885 7602UR 2496 Orofacial Pathologies, Imaging and Biotherapies. Dental School Université de Paris, AP-HP- Hôpital Bretonneau - Service Odontologie CRMR Métabolisme du Phosphore et du Calcium (OSCAR, ERN Bond), Paris, France ,grid.420021.50000 0001 2153 6793UMR 7206 CNRS MNHN UP Ecoanthropologie Musée de l’Homme, Paris, France
| | - Margherita Mussi
- Italian Archaeological Mission at Melka Kunture and Balchit, Rome, Italy. .,Dipartimento di Scienze dell'Antichità, Università di Roma La Sapienza, Piazzale A. Moro 5, 00185, Rome, Italy.
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Urzúa B, Ortega-Pinto A, Adorno-Farias D, Morales-Bozo I, Rojas-Flores S, Briones-Marín D, Lepiman-Torres C. Exploring the Pool of Pathogenic Variants of Amelogenesis Imperfecta: An Approach to the Understanding of Its Genetic Architecture. FRONTIERS IN DENTAL MEDICINE 2021. [DOI: 10.3389/fdmed.2021.785382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Objective: To identify which genes are associated with the clinical phenotype of amelogenesis Imperfecta (AI) and to elucidate which of these genes participate in the determination of isolated and syndromic forms.Methods: In this review, all data on mutations described in AI-related genes were obtained from HGMD® Professional. The data in relation to the mutations, inheritance, phenotype, type of AI and country were supplemented with information from the literature. The identity codes and frequency values were obtained from the dbSNP, ClinVar and OMIM databases. The percentage of specificity (PE) was determined for each gene.Results: HGMD® describes 27 genes involved in AI, which we propose to group into 5 categories: (1) genes whose mutations are associated only with isolated AI, (2) genes whose mutations cause only syndromic AI, (3) genes with both mutations that cause isolated AI and mutations responsible for other pathologies, (4) genes with mutations responsible for syndromic AI and mutations that cause other pathologies, and (5) genes with mutations that cause isolated AI and mutations that cause AI associated with syndromes and other pathologies. Using the PE calculation, the genes were ranked into 5 specificity groups. The genes of category 1 are specific for isolated AI, while the genes of categories 2 and 4 are non-specific. Interestingly, we observed that mutations in some genes were associated with different types of cancer.Conclusion: The ACP4, AMTN, MMP20, ODAPH, RELT, SLC24A4 and SP6 genes participate in causing isolated AI, and the CNNM4, DLX3 and FAM20A genes participate in causing syndromic forms of AI.
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Abstract
Non-syndromic inherited defects of tooth dentin are caused by two classes of dominant negative/gain-of-function mutations in dentin sialophosphoprotein (DSPP): 5' mutations affecting an N-terminal targeting sequence and 3' mutations that shift translation into the - 1 reading frame. DSPP defects cause an overlapping spectrum of phenotypes classified as dentin dysplasia type II and dentinogenesis imperfecta types II and III. Using CRISPR/Cas9, we generated a Dspp-1fs mouse model by introducing a FLAG-tag followed by a single nucleotide deletion that translated 493 extraneous amino acids before termination. Developing incisors and/or molars from this mouse and a DsppP19L mouse were characterized by morphological assessment, bSEM, nanohardness testing, histological analysis, in situ hybridization and immunohistochemistry. DsppP19L dentin contained dentinal tubules but grew slowly and was softer and less mineralized than the wild-type. DsppP19L incisor enamel was softer than normal, while molar enamel showed reduced rod/interrod definition. Dspp-1fs dentin formation was analogous to reparative dentin: it lacked dentinal tubules, contained cellular debris, and was significantly softer and thinner than Dspp+/+ and DsppP19L dentin. The Dspp-1fs incisor enamel appeared normal and was comparable to the wild-type in hardness. We conclude that 5' and 3' Dspp mutations cause dental malformations through different pathological mechanisms and can be regarded as distinct disorders.
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49
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Neves VCM, Pugh J, Savulescu J. Beyond oral hygiene, are capacity-altering, biologically based interventions within the moral domain of dentistry? Br Dent J 2021; 231:277-280. [PMID: 34508196 DOI: 10.1038/s41415-021-3335-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Accepted: 03/25/2021] [Indexed: 11/09/2022]
Abstract
Oral diseases such as dental caries (DC) and periodontitis are widely prevalent, and existing approaches to managing these conditions have only a limited effect. Accordingly, there is growing interest in the development of novel biological interventions (including, among others, CRISPR-Cas9) that might, in the future, be used to prevent the development of or cure these conditions. However, in addition to familiar concerns about using biological interventions in children who cannot provide valid consent, it is not clear whether the provision of these interventions would fall within the proper domain of dentistry. In this opinion paper, we defend the view that the provision of reasonably safe and effective novel biological interventions aimed at preventing DC and periodontitis should be understood to fall within the proper domain of dentistry. To do so, we first argue that their use would be consistent with existing practice in dentistry. We then argue that: i) they may substantially increase the recipient's wellbeing and future autonomy; and ii) that their use could constitute a form of indirect preventative medicine by addressing a threat to systemic health.
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Affiliation(s)
- Vitor C M Neves
- Centre for Host-Microbiome Interactions, Faculty of Dentistry, Oral and Craniofacial Sciences, King's College London, UK.
| | - Jonathan Pugh
- Oxford Uehiro Centre for Practical Ethics, University of Oxford, UK
| | - Julian Savulescu
- Oxford Uehiro Centre for Practical Ethics, University of Oxford, UK
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50
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Gutiérrez-Prieto SJ, Sequeda-Castañeda LG, Penedo-Jaramillo GM, Chacín-Nieto AV, Contreras-Cáceres DR, Moreno-Abello GC, Galvis-Rincón MP, Gamboa-Jaimes FO, Luengas-Caicedo PE. In vitro mineral apposition analysis of two Colombian plant extracts on Amelogenesis imperfecta teeth. Clin Exp Dent Res 2021; 8:336-349. [PMID: 34498426 PMCID: PMC8874054 DOI: 10.1002/cre2.485] [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: 02/09/2021] [Revised: 07/30/2021] [Accepted: 08/08/2021] [Indexed: 11/07/2022] Open
Abstract
OBJECTIVE To determine if native Colombian Piper marginatum Jacq. and Ilex guayusa Loes plant extracts have a remineralizing effect on teeth with Amelogenesis imperfecta in comparison with the commercial products Clinpro-3M and Recaldent™. MATERIAL AND METHODS An in vitro study was carried out with 128 human teeth slices (64 healthy and 64 with Amelogenesis imperfecta) on which an initial Raman spectroscopy was performed followed by Raman spectroscopies at 0, 24, 48, and 72 h to determine possible remineralization by observing mineral increase or decrease as a result of P. marginatum Jacq. and I. guayusa Loes extract application in comparison to control substance (Clinpro and Recaldent™) application. Obtained data were analyzed using a bivariate method with a t unidirectional test. Significant differences among groups were determined by an ANOVA with Dunnett post hoc tests. RESULTS Native I. guayusa Loes and P. marginatum Jacq. Colombian plants extracts exhibited phosphate and orthophosphate mineral apposition, where P. marginatum Jacq. presented better results. CONCLUSIONS Native Colombian I. guayusa Loes and P. marginatum Jacq plant extract might in the future be useful for dental tissue remineralization, as they induced phosphate and orthophosphate mineral apposition, main components of tooth enamel. These types of natural compounds can become an alternative to fluorine, whose ingestion is harmful to the human body.
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Affiliation(s)
- Sandra J Gutiérrez-Prieto
- Department of Dental Systems, Dentistry Research Centre, School of Dentistry, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - Luis G Sequeda-Castañeda
- Department of Chemistry, Faculty of Sciences, Pontificia Universidad Javeriana, Bogotá, Colombia.,Department of Pharmacy, Faculty of Sciences, Universidad Nacional de Colombia, Bogotá, Colombia
| | - Gabriela M Penedo-Jaramillo
- Department of Dental Systems, Dentistry Research Centre, School of Dentistry, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - Andrea V Chacín-Nieto
- Department of Dental Systems, Dentistry Research Centre, School of Dentistry, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - Daniel R Contreras-Cáceres
- Department of Dental Systems, Dentistry Research Centre, School of Dentistry, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - Gloria C Moreno-Abello
- Department of Dental Systems, Dentistry Research Centre, School of Dentistry, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - María P Galvis-Rincón
- Department of Periodontal Systems, Dentistry Research Centre, School of Dentistry, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - Fredy O Gamboa-Jaimes
- Department of Microbiology, Faculty of Sciences, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - Pilar E Luengas-Caicedo
- Department of Pharmacy, Faculty of Sciences, Universidad Nacional de Colombia, Bogotá, Colombia
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