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Rady D, Albar N, Khayat W, Khalil M, Raafat S, Ramadan M, Saber S, Shamel M. Evaluation of dental pulp stem cells response to flowable nano-hybrid dental composites: A comparative analysis. PLoS One 2024; 19:e0303154. [PMID: 38739591 PMCID: PMC11090312 DOI: 10.1371/journal.pone.0303154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Accepted: 04/20/2024] [Indexed: 05/16/2024] Open
Abstract
BACKGROUND Flowable resin composites (FRC) are tooth-colored restorative materials that contain a lower filler particle content, and lower viscosity than their bulk counterparts, making them useful for specific clinical applications. Yet, their chemical makeup may impact the cellular population of the tooth pulp. This in-vitro study assessed the cytocompatibility and odontogenic differentiation capacity of dental pulp stem cells (DPSCs) in response to two recent FRC material extracts. METHODS Extracts of the FRC Aura easyflow (AEF) and Polofil NHT Flow (PNF) were applied to DPSCs isolated from extracted human teeth. Cell viability of DPSCs was assessed using MTT assay on days 1, 3 and 7. Cell migration was assessed using the wound healing assay. DPSCs' capacity for osteo/odontogenic differentiation was assessed by measuring the degree of mineralization by Alizarin Red S staining, alkaline phosphatase enzyme (ALP) activity, and monitoring the expression of osteoprotegerin (OPG), RUNX Family Transcription Factor 2 (RUNX2), and the odontogenic marker dentin sialophosphoprotein (DSPP) by RT-PCR. Monomer release from the FRC was also assessed by High-performance liquid chromatography analysis (HPLC). RESULTS DPSCs exposed to PNF extracts showed significantly higher cell viability, faster wound closure, and superior odontogenic differentiation. This was apparent through Alizarin Red staining of calcified nodules, elevated alkaline phosphatase activity, and increased expression of osteo/odontogenic markers. Moreover, HPLC analysis revealed a higher release of TEDGMA, UDMA, and BISGMA from AEF. CONCLUSIONS PNF showed better cytocompatibility and enhancement of odontogenic differentiation than AEF.
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Affiliation(s)
- Dina Rady
- Faculty of Dentistry, Oral Biology Department, Cairo University, Cairo, Egypt
- Faculty of Dentistry, Stem Cells and Tissue Engineering Research Group, Cairo University, Cairo, Egypt
| | - Nassreen Albar
- Restorative Department/ Operative, College of Dentistry, Jazan University, Jazan, Saudi Arabia
| | - Waad Khayat
- Department of Restorative Dentistry, College of Dentistry, Umm Al-Qura University, Mecca, Saudi Arabia
| | - Mennatullah Khalil
- Hamdan Bin Mohamed College of Dental Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai Healthcare City, Dubai, United Arab Emirates
- Faculty of Dentistry, Dental Biomaterials Department, Fayoum University, Fayoum, Egypt
| | - Shereen Raafat
- Faculty of Dentistry, Pharmacology Department, The British University in Egypt (BUE), El Sherouk City, Egypt
- Dental Science Research Group, Health Research Centre of Excellence, The British University in Egypt (BUE), El Sherouk City, Egypt
| | - Mohamed Ramadan
- Specialized Dental Hospital, Armed Forces Medical Complex, Cairo, Egypt
| | - Shehabeldin Saber
- Dental Science Research Group, Health Research Centre of Excellence, The British University in Egypt (BUE), El Sherouk City, Egypt
- Faculty of Dentistry, Department of Endodontics, The British University in Egypt (BUE), El Sherouk City, Egypt
- Faculty of Dentistry, Department of Endodontics, Ain Shams University, Cairo, Egypt
| | - Mohamed Shamel
- Faculty of Dentistry, Oral Biology Department, The British University in Egypt, El Sherouk City, Egypt
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Hassib NF, Mehrez M, Mostafa MI, Abdel-Hamid MS. Isolated dentinogenesis imperfecta: Novel DSPP variants and insights on genetic counselling. Clin Oral Investig 2024; 28:254. [PMID: 38630328 PMCID: PMC11024031 DOI: 10.1007/s00784-024-05636-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Accepted: 03/23/2024] [Indexed: 04/19/2024]
Abstract
OBJECTIVE Dentinogenesis imperfecta (DI) is an inherited dentin defect and may be isolated or associated with disorders such as osteogenesis imperfecta, odontochondrodysplasia Ehler-Danlos and others. Isolated DI is caused mainly by pathogenic variants in DSPP gene and around 50 different variants have been described in this gene. Herein, we report on 19 patients from two unrelated Egyptian families with isolated DI. Additionally, we focused on genetic counselling of the two families. MATERIALS AND METHODS The patients were examined clinically and dentally. Panoramic X-rays were done to some patients. Whole exome sequencing (WES) and Sanger sequencing were used. RESULTS WES revealed two new nonsense variants in DSPP gene, c.288T > A (p.Tyr96Ter) and c.255G > A (p.Trp85Ter). Segregation analysis by Sanger sequencing confirmed the presence of the first variant in all affected members of Family 1 while the second variant was confirmed to be de novo in the patient of Family 2. CONCLUSIONS AND CLINICAL RELEVANCE Our study extends the number of DSPP pathogenic variants and strengthens the fact that DSPP is the most common DI causative gene irrespective of patients' ethnicity. In addition, we provide insights on genetic counseling issues in patients with inherited DSPP variants taking into consideration the variable religion, culture and laws in our society.
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Affiliation(s)
- Nehal F Hassib
- Orodental Genetics Department, Human Genetics and Genome Research Institute, National Research Centre, 33 ElBohous street, Dokki, P.O.12622, Cairo, 3337 09 31, Egypt.
- School of dentistry, New Giza University, Giza, Egypt.
| | - Mennat Mehrez
- Orodental Genetics Department, Human Genetics and Genome Research Institute, National Research Centre, 33 ElBohous street, Dokki, P.O.12622, Cairo, 3337 09 31, Egypt
| | - Mostafa I Mostafa
- Orodental Genetics Department, Human Genetics and Genome Research Institute, National Research Centre, 33 ElBohous street, Dokki, P.O.12622, Cairo, 3337 09 31, Egypt
| | - Mohamed S Abdel-Hamid
- Medical Molecular Genetics Department, Human Genetics and Genome Research Institute, National Research Centre, Cairo, Egypt
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Su T, Zhu Y, Wang X, Zhu Q, Duan X. Hereditary dentin defects with systemic diseases. Oral Dis 2023; 29:2376-2393. [PMID: 37094075 DOI: 10.1111/odi.14589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 03/31/2023] [Accepted: 04/06/2023] [Indexed: 04/26/2023]
Abstract
OBJECTIVE This review aimed to summarize recent progress on syndromic dentin defects, promoting a better understanding of systemic diseases with dentin malformations, the molecules involved, and related mechanisms. SUBJECTS AND METHODS References on genetic diseases with dentin malformations were obtained from various sources, including PubMed, OMIM, NCBI, and other websites. The clinical phenotypes and genetic backgrounds of these diseases were then summarized, analyzed, and compared. RESULTS Over 10 systemic diseases, including osteogenesis imperfecta, hypophosphatemic rickets, vitamin D-dependent rickets, familial tumoral calcinosis, Ehlers-Danlos syndrome, Schimke immuno-osseous dysplasia, hypophosphatasia, Elsahy-Waters syndrome, Singleton-Merten syndrome, odontochondrodysplasia, and microcephalic osteodysplastic primordial dwarfism type II were examined. Most of these are bone disorders, and their pathogenic genes may regulate both dentin and bone development, involving extracellular matrix, cell differentiation, and metabolism of calcium, phosphorus, and vitamin D. The phenotypes of these syndromic dentin defects various with the involved genes, part of them are similar to dentinogenesis imperfecta or dentin dysplasia, while others only present one or two types of dentin abnormalities such as discoloration, irregular enlarged or obliterated pulp and canal, or root malformation. CONCLUSION Some specific dentin defects associated with systemic diseases may serve as important phenotypes for dentists to diagnose. Furthermore, mechanistic studies on syndromic dentin defects may provide valuable insights into isolated dentin defects and general dentin development or mineralization.
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Affiliation(s)
- Tongyu Su
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Department of Oral Biology & Clinic of Oral Rare and Genetic Diseases, School of Stomatology, The Fourth Military Medical University, Xi'an, China
| | - Yulong Zhu
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Department of Oral Biology & Clinic of Oral Rare and Genetic Diseases, School of Stomatology, The Fourth Military Medical University, Xi'an, China
| | - Xiangpu Wang
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Department of Oral Biology & Clinic of Oral Rare and Genetic Diseases, School of Stomatology, The Fourth Military Medical University, Xi'an, China
| | - Qinglin Zhu
- Department of Operative Dentistry and Endodontics, School of Stomatology, The Fourth Military Medical University & State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Xi'an, China
| | - Xiaohong Duan
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Department of Oral Biology & Clinic of Oral Rare and Genetic Diseases, School of Stomatology, The Fourth Military Medical University, Xi'an, China
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Tabassum N, Khalid S, Ghafoor S, Woo KM, Lee EH, Samie M, Konain K, Ponnusamy S, Arany P, Rahman SU. Tideglusib-incorporated nanofibrous scaffolds potently induce odontogenic differentiation. J Biomater Appl 2023:8853282231190470. [PMID: 37485690 DOI: 10.1177/08853282231190470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2023]
Abstract
Pulp-Dentin regeneration is a key aspect of maintain tooth vitality and enabling good oral-systemic health. This study aimed to investigate a nanofibrous scaffold loaded with a small molecule i.e. Tideglusib to promote odontogenic differentiation. Tideglusib (GSK-3β inhibitor) interaction with GSK-3β was determined using molecular docking and stabilization of β-catenin was examined by confocal microscopy. 3D nanofibrous scaffolds were fabricated through electrospinning and their physicochemical characterizations were performed. Scaffolds were seeded with mesenchymal stem cells or pre-odontoblast cells to determine the cells proliferation and odontogenic differentiation. Our results showed that Tideglusib (TG) binds with GSK-3β at Cys199 residue. Stabilization and nuclear translocation of β-catenin was increased in the odontoblast cells treated with TG. SEM analysis revealed that nanofibers exhibited controlled architectural features that effectively mimicked the natural ECM. UV-Vis spectroscopy demonstrated that TG was incorporated successfully and released in a controlled manner. Both kinds of biomimetic nanofibrous matrices (PCLF-TG100, PCLF-TG1000) significantly stimulated cells proliferation. Furthermore, these scaffolds significantly induced dentinogenic markers (ALP, and DSPP) expression and biomineralization. In contrast to current pulp capping material driving dentin repair, the sophisticated, polymeric scaffold systems with soluble and insoluble spatiotemporal cues described here can direct stem cell differentiation and dentin regeneration. Hence, bioactive small molecule-incorporated nanofibrous scaffold suggests an innovative clinical tool for dentin tissue engineering.
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Affiliation(s)
- Nadia Tabassum
- Interdisciplinary Research Centre in Biomedical Materials (IRCBM), COMSATS University Islamabad, Lahore Campus, Lahore, Pakistan
- PGMI, De Montmorency College of Dentistry, Lahore, Pakistan
| | - Saira Khalid
- PGMI, De Montmorency College of Dentistry, Lahore, Pakistan
| | - Sarah Ghafoor
- Oral Biology, University of Health Sciences, Lahore, Pakistan
| | - Kyung Mi Woo
- Department of Molecular Genetics, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of Korea
| | - Eun Hye Lee
- Department of Molecular Genetics, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of Korea
| | - Muhammad Samie
- Institute of Pharmaceutical Sciences, Khyber Medical University, Peshawar, Pakistan
| | - Kiran Konain
- Molecular Biology, Institute of Basic Medical Sciences, Khyber Medical University, Peshawar, Pakistan
| | - Sasikumar Ponnusamy
- Oral Biology, Surgery and Biomedial Engineering, University at Buffalo, NY, USA
| | - Praveen Arany
- Oral Biology, Surgery and Biomedial Engineering, University at Buffalo, NY, USA
| | - Saeed Ur Rahman
- Interdisciplinary Research Centre in Biomedical Materials (IRCBM), COMSATS University Islamabad, Lahore Campus, Lahore, Pakistan
- Oral Biology, Surgery and Biomedial Engineering, University at Buffalo, NY, USA
- Oral Biology, Institute of Basic Medical Sciences, Khyber Medical University, Peshawar, Pakistan
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Calsa B, Bortolança TJ, Masiero BC, Esquisatto MAM, de Oliveira CA, Catisti R, Santamaria-Jr M. Maxillary and dental development in the offspring of protein-restricted female rats. Eur J Oral Sci 2022; 130:e12895. [PMID: 36199171 DOI: 10.1111/eos.12895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Accepted: 08/31/2022] [Indexed: 12/13/2022]
Abstract
Nutritional restriction during developmental periods impairs organ physiology. Female rats were subjected to protein restriction during pregnancy and lactation to analyze dental and maxillary development. Four exposure groups were considered: normal-protein diet during pregnancy and lactation (NP, 17% casein), low-protein diet during lactation (LP-L, 6% casein), low-protein diet during pregnancy and lactation (LP), and low-protein diet during pregnancy (LP-G). Maxillae from 15-day-old male pups were collected. All protein-restricted groups presented increased dentin thickness and reduced alveolar bone area. When protein restriction was applied during both gestation and lactation (LP), harmful effects were observed in the form of loss of protective OPG (osteoprotegerin) in tooth epithelium-mesenchyme, due to higher RANKL expression, delay in odontoblast maturation, less dental pulp vascularity, reduction in amount of alveolar bone, and less matrix mineralization. In the LP-L group, effects of protein restriction seemed less harmful, and despite less alveolar bone, the enhancement in BMP-7, VEGF, and RANKL seems a compensatory signal to maintain maxillary osteogenesis. In LP-G animals, Dspp expression was higher, suggesting a delay in odontoblast maturation or expression recuperation. In conclusion, maternal protein restriction affects dental and maxillary development. A low-protein diet only in gestation allows for normal development. A low-protein diet during gestation-lactation results in impaired odontogenesis that may increase susceptibility of dental anomalies.
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Affiliation(s)
- Bruno Calsa
- Graduate Program of Biomedical Sciences, Herminio Ometto University Center, Araras, São Paulo, Brazil
| | | | - Beatriz Calloni Masiero
- Graduate Program of Biomedical Sciences, Herminio Ometto University Center, Araras, São Paulo, Brazil
| | | | - Camila Andrea de Oliveira
- Graduate Program of Biomedical Sciences, Herminio Ometto University Center, Araras, São Paulo, Brazil
| | - Rosana Catisti
- Graduate Program of Biomedical Sciences, Herminio Ometto University Center, Araras, São Paulo, Brazil
| | - Milton Santamaria-Jr
- Graduate Program of Biomedical Sciences, Herminio Ometto University Center, Araras, São Paulo, Brazil.,Graduate Program of Orthodontics, Herminio Ometto University Center, Araras, São Paulo, Brazil
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Ren H, Wen Q, Zhao Q, Wang N, Zhao Y. Atlas of human dental pulp cells at multiple spatial and temporal levels based on single-cell sequencing analysis. Front Physiol 2022; 13:993478. [PMID: 36267574 PMCID: PMC9578252 DOI: 10.3389/fphys.2022.993478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 09/12/2022] [Indexed: 11/13/2022] Open
Abstract
The dental pulp plays a crucial role in the long-term maintenance of tooth function. The progress of endodontic treatment and pulp tissue regeneration engineering has made pulp-regeneration therapy promising in clinical practice. However, the mechanisms of pulp regeneration and the role of dental stem cells in development and regeneration have not been fully elucidated. Bridging the gaps between clinical operation and basic research is urgently needed. With the application of single-cell sequencing technology in dental research, the landscapes of human dental pulp cells have begun being outlined. However, the specific cellular heterogeneity of dental pulp cells, especially that of dental stem cells, at different spatial and temporal levels, is still unclear. In this study, we used single-cell RNA sequencing analysis of pulp samples at four different developmental stages and combined the findings with immunohistochemical staining to explore the development of dental pulp and stem cells. The results revealed temporal changes in the proportion of pulp cells during development. For example, mononuclear phagocytes accounted for a higher proportion in early samples. Odontoblasts identified by DMP1 had a higher expression of ion channel-related and neurodevelopment-related genes. Subpopulations were identified in fibroblasts, odontoblasts, and mesenchymal stem cells. We identified a subclass of odontoblasts that expresses DGKI and RRBP1 present in early developmental samples. A population of earlier mesenchymal stem cells expressed the SEPTIN gene, which may have greater proliferative and differentiation potential. Furthermore, dental pulp stem cells can differentiate into two directions: mineralization and myogenesis. In summary, the specific cellular heterogeneity of dental pulp cells was revealed at different spatial and temporal levels. These findings may shed light on the mechanism of tooth development. The gene expression profile of developing pulp cells may help to select cells for regenerative engineering and improve the success of dental pulp regeneration.
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Affiliation(s)
- Huihui Ren
- Department of Pediatric Dentistry, Peking University School and Hospital of Stomatology and National Center of Stomatology and National Clinical Research Center for Oral Diseases and National Engineering Laboratory for Digital and Material Technology of Stomatology and Beijing Key Laboratory of Digital Stomatology and Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health and NMPK Key Laboratory for Dental Materials, Beijing, China
| | - Quan Wen
- First Clinical Division, Peking University School and Hospital of Stomatology, Beijing, China
| | - Qingxuan Zhao
- Department of Pediatric Dentistry, Peking University School and Hospital of Stomatology and National Center of Stomatology and National Clinical Research Center for Oral Diseases and National Engineering Laboratory for Digital and Material Technology of Stomatology and Beijing Key Laboratory of Digital Stomatology and Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health and NMPK Key Laboratory for Dental Materials, Beijing, China
| | - Nan Wang
- Department of Pediatric Dentistry, Peking University School and Hospital of Stomatology and National Center of Stomatology and National Clinical Research Center for Oral Diseases and National Engineering Laboratory for Digital and Material Technology of Stomatology and Beijing Key Laboratory of Digital Stomatology and Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health and NMPK Key Laboratory for Dental Materials, Beijing, China
| | - Yuming Zhao
- Department of Pediatric Dentistry, Peking University School and Hospital of Stomatology and National Center of Stomatology and National Clinical Research Center for Oral Diseases and National Engineering Laboratory for Digital and Material Technology of Stomatology and Beijing Key Laboratory of Digital Stomatology and Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health and NMPK Key Laboratory for Dental Materials, Beijing, China
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Chuang SF, Chen YH, Ma PX, Ritchie HH. Dentin Sialoprotein/Phosphophoryn (DSP/PP) as Bio-Inductive Materials for Direct Pulp Capping. Polymers (Basel) 2022; 14:3656. [PMID: 36080731 DOI: 10.3390/polym14173656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 08/26/2022] [Accepted: 08/28/2022] [Indexed: 11/23/2022] Open
Abstract
Conventional direct pulp capping, such as calcium hydroxide (Ca(OH)2) or silicate products, usually induces an inflammatory reaction to provoke pulp regeneration. Phosphophoryn (PP) and dentin sialoprotein (DSP), the two most abundant non-collagenous proteins in the dentin matrix, are responsible for dentin mineralization, pulp cell migration, and differentiation. Here we examined the PP and combined DSP/PP as bio-inductive pulp capping materials by in vitro and in vivo tests. Firstly, the effects of the PP dose on pulp cell migration and matrix protein expression were examined by an agarose bead test. Secondly, the role of recombinant DSP (recDSP) and recDSP/PP on stimulating DSP-PP transcript expression was examined by RT-PCR. DSPP mRNA was also knocked down by RNA interference (RNAi) to examine their functions on dentin matrix mineralization. Finally, we used ferret animal models to test PP and recDSP/PP acting as capping agents on in vivo pulp responses and reparative dentin formation. The result showed that intermediate-dose PP was the most effective to enhance cell migration and differentiation. RecDSP/PP strongly enhanced the DSP-PP transcript expression, while inhibition of DSPP mRNA expression by siRNAs partially or completely affected dental pulp cell mineralization. The in vivo results showed that intermediate-dose PP and recDSP/PP proteins induced less pulp inflammation and promoted reparative dentin formation. Contrarily, conventional calcium hydroxide induced severe pulp inflammation. With these findings, DSP and PP could serve as capping agents for pulp capping therapy.
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Desoutter A, Cases O, Collart Dutilleul PY, Simancas Escorcia V, Cannaya V, Cuisinier F, Kozyraki R. Enamel and dentin in Enamel renal syndrome: A confocal Raman microscopy view. Front Physiol 2022; 13:957110. [PMID: 36091358 PMCID: PMC9453029 DOI: 10.3389/fphys.2022.957110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 08/01/2022] [Indexed: 11/13/2022] Open
Abstract
Enamel Renal Syndrome (ERS) is a rare genetic disorder caused by biallelic mutations in Family with sequence similarity 20A (FAM20A) gene encoding the secretory pathway pseudokinase FAM20A. ERS is characterized by hypoplastic amelogenesis imperfecta (AI), impaired tooth eruption, intra-pulpal calcifications, gingival fibromatosis and nephrocalcinosis of various severity. Previous studies showed that the hypoplastic enamel was also hypomineralized but its chemical composition has not been extensively studied. Furthermore it is currently unclear whether dentinal defects are associated with AI in ERS patients. The objective of the study was to provide a structural and chemical analysis of enamel, dentin and dentin enamel junction (DEJ) in ERS patients carrying four, previously reported, distinct mutations in FAM20A. Chemical cartography obtained with Raman microscopy showed that compared to control samples, ERS enamel composition was severely altered and a cementum-like structure was observed in some cases. Chemical composition of peripulpal dentin was also affected and usual gradient of phosphate intensity, shown in DEJ profile, was absent in ERS samples. DEJ and dentinal anomalies were further confirmed by scanning electron microscopy analysis. In conclusion, our study shows that enamel formation is severely compromised in ERS patients and provides evidence that dentinal defects are an additional feature of the ERS dental phenotype.
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Affiliation(s)
- Alban Desoutter
- Laboratoire Bioingénierie et Nanosciences LBN, Université de Montpellier, Montpellier, France
- *Correspondence: Alban Desoutter,
| | - Olivier Cases
- Centre de Recherche des Cordeliers, Sorbonne Université, INSERM, Université de Paris Cité, Laboratory of Oral Molecular Pathophysiology, Paris, France
| | | | - Victor Simancas Escorcia
- Centre de Recherche des Cordeliers, Sorbonne Université, INSERM, Université de Paris Cité, Laboratory of Oral Molecular Pathophysiology, Paris, France
- Facultad de Odontología, Universidad de Cartagena, Grupo Interdisciplinario de Investigaciones y Tratamientos Odontológicos Universidad de Cartagena (GITOUC), Cartagena, Colombia
| | - Vidjea Cannaya
- Centre de Recherche des Cordeliers, Sorbonne Université, INSERM, Université de Paris Cité, Laboratory of Oral Molecular Pathophysiology, Paris, France
| | - Frédéric Cuisinier
- Laboratoire Bioingénierie et Nanosciences LBN, Université de Montpellier, Montpellier, France
| | - Renata Kozyraki
- Centre de Recherche des Cordeliers, Sorbonne Université, INSERM, Université de Paris Cité, Laboratory of Oral Molecular Pathophysiology, Paris, France
- CRMR O-RARES, Hôpital Rothshild, UFR d’Odontologie-Garancière, Université de Paris Cité, Paris, France
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