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Wu K, Li X, Bai Y, Heng BC, Zhang X, Deng X. The circadian clock in enamel development. Int J Oral Sci 2024; 16:56. [PMID: 39242565 PMCID: PMC11379899 DOI: 10.1038/s41368-024-00317-9] [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: 03/13/2024] [Revised: 06/02/2024] [Accepted: 06/12/2024] [Indexed: 09/09/2024] Open
Abstract
Circadian rhythms are self-sustaining oscillations within biological systems that play key roles in a diverse multitude of physiological processes. The circadian clock mechanisms in brain and peripheral tissues can oscillate independently or be synchronized/disrupted by external stimuli. Dental enamel is a type of mineralized tissue that forms the exterior surface of the tooth crown. Incremental Retzius lines are readily observable microstructures of mature tooth enamel that indicate the regulation of amelogenesis by circadian rhythms. Teeth enamel is formed by enamel-forming cells known as ameloblasts, which are regulated and orchestrated by the circadian clock during amelogenesis. This review will first examine the key roles of the circadian clock in regulating ameloblasts and amelogenesis. Several physiological processes are involved, including gene expression, cell morphology, metabolic changes, matrix deposition, ion transportation, and mineralization. Next, the potential detrimental effects of circadian rhythm disruption on enamel formation are discussed. Circadian rhythm disruption can directly lead to Enamel Hypoplasia, which might also be a potential causative mechanism of amelogenesis imperfecta. Finally, future research trajectory in this field is extrapolated. It is hoped that this review will inspire more intensive research efforts and provide relevant cues in formulating novel therapeutic strategies for preventing tooth enamel developmental abnormalities.
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Affiliation(s)
- Ke Wu
- Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing, China
| | - Xiaochan Li
- Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing, China
- 4th Division, Peking University School and Hospital of Stomatology, Beijing, China
- Department of Dental Materials & Dental Medical Devices Testing Center, Peking University School and Hospital of Stomatology, Beijing, China
| | - Yunyang Bai
- Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing, China
| | - Boon Chin Heng
- Department of Dental Materials & Dental Medical Devices Testing Center, Peking University School and Hospital of Stomatology, Beijing, China.
| | - Xuehui Zhang
- Department of Dental Materials & Dental Medical Devices Testing Center, Peking University School and Hospital of Stomatology, Beijing, China.
- National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, NMPA Key Laboratory for Dental Materials, Beijing Laboratory of Biomedical Materials & Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, Beijing, China.
- Oral Translational Medicine Research Center Joint Training base for Shanxi Provincial Key Laboratory in Oral and Maxillofacial Repair Reconstruction and Regeneration The First People's Hospital of Jinzhong, Jinzhong, China.
| | - Xuliang Deng
- Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing, China.
- National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, NMPA Key Laboratory for Dental Materials, Beijing Laboratory of Biomedical Materials & Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, Beijing, China.
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2
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Zhao T, Chen L, Yu C, He G, Lin H, Sang H, Chen Z, Hong Y, Sui W, Zhao J. Effect of injectable calcium alginate-amelogenin hydrogel on macrophage polarization and promotion of jawbone osteogenesis. RSC Adv 2024; 14:2016-2026. [PMID: 38196914 PMCID: PMC10774865 DOI: 10.1039/d3ra05046g] [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: 07/26/2023] [Accepted: 12/14/2023] [Indexed: 01/11/2024] Open
Abstract
Due to persistent inflammation and limited osteogenesis, jawbone defects present a considerable challenge in regenerative medicine. Amelogenin, a major protein constituent of the developing enamel matrix, demonstrates promising capabilities in inducing regeneration of periodontal supporting tissues and exerting immunomodulatory effects. These properties render it a potential therapeutic agent for enhancing jawbone osteogenesis. Nevertheless, its clinical application is hindered by the limitations of monotherapy and its rapid release characteristics, which compromise its efficacy and delivery efficiency. In this context, calcium alginate hydrogel, recognized for its superior physicochemical properties and biocompatibility, emerges as a candidate for developing a synergistic bioengineered drug delivery system. This study describes the synthesis of an injectable calcium amelogenin/calcium alginate hydrogel using calcium alginate loaded with amelogenin. We comprehensively investigated its physical properties, its role in modulating the immunological environment conducive to bone healing, and its osteogenic efficacy in areas of jawbone defects. Our experimental findings indicate that this synthesized composite hydrogel possesses desirable mechanical properties such as injectability, biocompatibility, and biodegradability. Furthermore, it facilitates jawbone formation by regulating the bone-healing microenvironment and directly inducing osteogenesis. This research provides novel insights into the development of bone-tissue regeneration materials, potentially advancing their clinical application.
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Affiliation(s)
- Tingting Zhao
- Shenzhen Stomatological Hospital, Southern Medical University 1092 Jianshe Road, Luohu District Shenzhen Guangdong 518001 China
| | - Luyuan Chen
- Stomatology Center, Shenzhen Hospital, Southern Medical University 1333 Xinhu Road, Baoan District Shenzhen Guangdong 510086 China
| | - Chengcheng Yu
- Department of Maxillofacial Surgery, Shenzhen Hospital, Southern Medical University 1333 Xinhu Road, Baoan District Shenzhen Guangdong 510086 China
| | - Gang He
- Department of Maxillofacial Surgery, Shenzhen Hospital, Southern Medical University 1333 Xinhu Road, Baoan District Shenzhen Guangdong 510086 China
| | - Huajun Lin
- Department of Maxillofacial Surgery, Shenzhen Hospital, Southern Medical University 1333 Xinhu Road, Baoan District Shenzhen Guangdong 510086 China
| | - Hongxun Sang
- Shenzhen Key Laboratory of Digital Surgical 3D Printing, Department of Orthopaedics, Shenzhen Hospital, Southern Medical University 1333 Xinhu Road, Baoan District Shenzhen Guangdong 510086 China
| | - Zhihui Chen
- Stomatology Center, Shenzhen Hospital, Southern Medical University 1333 Xinhu Road, Baoan District Shenzhen Guangdong 510086 China
| | - Yonglong Hong
- Department of Maxillofacial Surgery, Shenzhen Hospital, Southern Medical University 1333 Xinhu Road, Baoan District Shenzhen Guangdong 510086 China
| | - Wen Sui
- College of Stomatology, Shenzhen Technology University 3002 Lantian Road, Pingshan District Shenzhen Guangdong 518118 China
| | - Jianjiang Zhao
- Shenzhen Stomatological Hospital, Southern Medical University 1092 Jianshe Road, Luohu District Shenzhen Guangdong 518001 China
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Taylor SD, Tao J, Shin Y, Buchko GW, Dohnalkova A, Grimm J, Tarasevich BJ, Ginovska B, Shaw WJ, Devaraj A. Resolving protein-mineral interfacial interactions during in vitro mineralization by atom probe tomography. MATERIALS TODAY. ADVANCES 2023; 18:100378. [PMID: 37324279 PMCID: PMC10262173 DOI: 10.1016/j.mtadv.2023.100378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Organic macromolecules exert remarkable control over the nucleation and growth of inorganic crystallites during (bio)mineralization, as exemplified during enamel formation where the protein amelogenin regulates the formation of hydroxyapatite (HAP). However, it is poorly understood how fundamental processes at the organic-inorganic interface, such as protein adsorption and/or incorporation into minerals, regulates nucleation and crystal growth due to technical challenges in observing and characterizing mineral-bound organics at high-resolution. Here, atom probe tomography techniques were developed and applied to characterize amelogenin-mineralized HAP particles in vitro, revealing distinct organic-inorganic interfacial structures and processes at the nanoscale. Specifically, visualization of amelogenin across the mineralized particulate demonstrates protein can become entrapped during HAP crystal aggregation and fusion. Identification of protein signatures and structural interpretations were further supported by standards analyses, i.e., defined HAP surfaces with and without amelogenin adsorbed. These findings represent a significant advance in the characterization of interfacial structures and, more so, interpretation of fundamental organic-inorganic processes and mechanisms influencing crystal growth. Ultimately, this approach can be broadly applied to inform how potentially unique and diverse organic-inorganic interactions at different stages regulates the growth and evolution of various biominerals.
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Affiliation(s)
- Sandra D. Taylor
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, 99354, USA
| | - Jinhui Tao
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, 99354, USA
| | - Yongsoon Shin
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, 99354, USA
| | - Garry W. Buchko
- Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, 99354, USA
- School of Molecular Biosciences, Washington State University, Pullman, WA, 99164, USA
| | - Alice Dohnalkova
- Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, 99354, USA
| | - Jack Grimm
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, 99354, USA
- Department of Materials Science and Engineering, University of Washington, Seattle, WA, 98195, USA
| | - Barbara J. Tarasevich
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, 99354, USA
| | - Bojana Ginovska
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, 99354, USA
| | - Wendy J. Shaw
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, 99354, USA
| | - Arun Devaraj
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, 99354, USA
- Metallurgical and Materials Engineering Department, Colorado School of Mines, Golden, CO, 80401, USA
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4
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Mu H, Dong Z, Wang Y, Chu Q, Gao Y, Wang A, Wang Y, Liu X, Gao Y. Odontogenesis-Associated Phosphoprotein (ODAPH) Overexpression in Ameloblasts Disrupts Enamel Formation via Inducing Abnormal Mineralization of Enamel in Secretory Stage. Calcif Tissue Int 2022; 111:611-621. [PMID: 36163390 DOI: 10.1007/s00223-022-01023-6] [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] [Received: 05/15/2022] [Accepted: 09/05/2022] [Indexed: 11/02/2022]
Abstract
Odontogenesis-associated phosphoprotein (ODAPH) is a recently discovered enamel matrix protein. Our previous study demonstrated that knockouting out Odaph in mice resulted in enamel hypomineralization. To further investigate the effect of Odaph on enamel mineralization, we constructed an Odaph overexpression mouse model, controlled by an amelogenin promoter. Our histological analysis of OdaphTg mice revealed that the enamel layer was thinner than in WT mice. An uneven, thinner enamel layer was confirmed using micro-computed tomography (uCT). It was subsequently found that the Tomes' processes lost their normal morphology, resulting in the loss of the enamel prism structure. These results indicate that Odaph overexpression in ameloblasts led to enamel dysplasia. In conjunction with this, Odaph overexpression hindered Amelx secretion, and may result in endoplasmic reticulum stress. Interestingly, uCT revealed that enamel had higher mineral density at the secretory stage; due to this, we did the histological staining for the mineralization-related proteins Alkaline phosphatase (ALPL) and Runt-related transcription factor 2 (RUNX2). It was observed that these proteins were up-regulated in OdaphTg mice versus WT mice, indicating that Odaph overexpression led to abnormal enamel mineralization. To confirm this, we transfected ameloblast-like cell line (ALC) with Odaph overexpression lentivirus in vitro and identified that both Alpl and Runx2 were strikingly upregulated in OE-mus-Odaph versus OE-NC cells. We concluded that the ectopic overexpression of Odaph in ameloblasts led to abnormal enamel mineralization. In summary, Odaph profoundly influences amelogenesis by participating in enamel mineralization.
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Affiliation(s)
- Haiyu Mu
- Department of Pediatrics and Preventive Dentistry, Binzhou Medical University Hospital, Binzhou, 256600, Shandong, China
| | - Zhiheng Dong
- Department of Pediatrics and Preventive Dentistry, Binzhou Medical University Hospital, Binzhou, 256600, Shandong, China.
| | - Yumin Wang
- Institute of Stomatology, Binzhou Medical University, Yantai, 264003, Shandong, China
| | - Qing Chu
- Department of Pediatrics and Preventive Dentistry, Binzhou Medical University Hospital, Binzhou, 256600, Shandong, China
| | - Yan Gao
- Department of Pediatrics and Preventive Dentistry, Binzhou Medical University Hospital, Binzhou, 256600, Shandong, China
| | - Aiqin Wang
- Department of Periodontics, Binzhou Medical University Hospital, Binzhou, 256600, Shandong, China
| | - Yu Wang
- Institute of Stomatology, Binzhou Medical University, Yantai, 264003, Shandong, China
| | - Xiaoying Liu
- Department of Cell Biology, College of Life Science and Technology, Weifang Medical University, Weifang, 261053, Shandong, China
| | - Yuguang Gao
- Department of Pediatrics and Preventive Dentistry, Binzhou Medical University Hospital, Binzhou, 256600, Shandong, China.
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5
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Surface and Structural Studies of Age-Related Changes in Dental Enamel: An Animal Model. MATERIALS 2022; 15:ma15113993. [PMID: 35683290 PMCID: PMC9182525 DOI: 10.3390/ma15113993] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 05/26/2022] [Accepted: 06/01/2022] [Indexed: 01/28/2023]
Abstract
In the animal kingdom, continuously erupting incisors provided an attractive model for studying the enamel matrix and mineral composition of teeth during development. Enamel, the hardest mineral tissue in the vertebrates, is a tissue sensitive to external conditions, reflecting various disturbances in its structure. The developing dental enamel was monitored in a series of incisor samples extending the first four weeks of postnatal life in the spiny mouse. The age-dependent changes in enamel surface morphology in the micrometre and nanometre-scale and a qualitative assessment of its mechanical features were examined by applying scanning electron microscopy (SEM) and atomic force microscopy (AFM). At the same time, structural studies using XRD and vibrational spectroscopy made it possible to assess crystallinity and carbonate content in enamel mineral composition. Finally, a model for predicting the maturation based on chemical composition and structural factors was constructed using artificial neural networks (ANNs). The research presented here can extend the existing knowledge by proposing a pattern of enamel development that could be used as a comparative material in environmental, nutritional, and pharmaceutical research.
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Petronijevic S, Stig S, Halstensen TS. Epitope mapping of anti-amelogenin IgG in untreated celiac children. Eur J Oral Sci 2021; 129:e12770. [PMID: 33656197 DOI: 10.1111/eos.12770] [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: 09/01/2020] [Revised: 01/04/2021] [Accepted: 01/12/2021] [Indexed: 11/28/2022]
Abstract
Children with untreated celiac disease (CeD) may develop enamel defects, and children with severe CeD have significantly increased levels of IgG to amelogenin, which may interfere with normal amelogenesis depending on which epitope(s) they bind. Children with untreated CeD (n = 42), for whom CeD had been confirmed either by biopsy (n = 17, cohort 1) or by the presence of particularly high serum levels of anti-transglutaminase 2 (TG2) IgA (n = 25, cohort 2), were selected from 146 children with CeD, and 10 controls were selected from 34 children who did not have CeD. Samples from these 52 children were used for detailed IgG anti-amelogenin, X isoform (AMELX) epitope mapping using 31 overlapping, 10-22mer peptides in ELISA. Although sera from both groups showed reactivity to peptides containing sequences from the N and C terminus of AMELX, sera from children with CeD reacted more strongly to peptides from the central region (amino acids 75-150) containing both a binding site for transforming growth factor-β (TGF-β), as well as the enzymatic cleavage sites for matrix metalloproteinase-20 and for kallikrein-4. Antigen-specific extraction revealed that only IgG to the central region cross-reacted to gliadin. Thus, cross-reactive anti-gliadin/amelogenin IgG may affect normal amelogenesis by interfering with enzymatic degradation, proper folding, and/or TGF-β signaling in children with untreated CeD.
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Affiliation(s)
- Sanja Petronijevic
- Institute of Oral Biology, Faculty of Dentistry, University of Oslo, Oslo, Norway
| | - Solveig Stig
- Institute of Oral Biology, Faculty of Dentistry, University of Oslo, Oslo, Norway
| | - Trond S Halstensen
- Institute of Oral Biology, Faculty of Dentistry, University of Oslo, Oslo, Norway.,Medical Department, Lovisenberg Diaconal Hospital, Oslo, Norway
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Buonasera T, Eerkens J, de Flamingh A, Engbring L, Yip J, Li H, Haas R, DiGiuseppe D, Grant D, Salemi M, Nijmeh C, Arellano M, Leventhal A, Phinney B, Byrd BF, Malhi RS, Parker G. A comparison of proteomic, genomic, and osteological methods of archaeological sex estimation. Sci Rep 2020; 10:11897. [PMID: 32681049 PMCID: PMC7368048 DOI: 10.1038/s41598-020-68550-w] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2020] [Accepted: 06/19/2020] [Indexed: 11/09/2022] Open
Abstract
Sex estimation of skeletons is fundamental to many archaeological studies. Currently, three approaches are available to estimate sex-osteology, genomics, or proteomics, but little is known about the relative reliability of these methods in applied settings. We present matching osteological, shotgun-genomic, and proteomic data to estimate the sex of 55 individuals, each with an independent radiocarbon date between 2,440 and 100 cal BP, from two ancestral Ohlone sites in Central California. Sex estimation was possible in 100% of this burial sample using proteomics, in 91% using genomics, and in 51% using osteology. Agreement between the methods was high, however conflicts did occur. Genomic sex estimates were 100% consistent with proteomic and osteological estimates when DNA reads were above 100,000 total sequences. However, more than half the samples had DNA read numbers below this threshold, producing high rates of conflict with osteological and proteomic data where nine out of twenty conditional DNA sex estimates conflicted with proteomics. While the DNA signal decreased by an order of magnitude in the older burial samples, there was no decrease in proteomic signal. We conclude that proteomics provides an important complement to osteological and shotgun-genomic sex estimation.
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Affiliation(s)
- Tammy Buonasera
- Department of Environmental Toxicology, University of California, Rm 5241B Meyer Hall, 1 Shields Ave, Davis, CA, 95616, USA. .,Department of Anthropology, University of California, Davis, USA.
| | - Jelmer Eerkens
- Department of Anthropology, University of California, Davis, USA
| | - Alida de Flamingh
- Program in Ecology, Evolution and Conservation Biology, University of Illinois, Urbana-Champaign, USA
| | - Laurel Engbring
- Far Western Anthropological Research Group, Inc, Davis, CA, USA
| | - Julia Yip
- Department of Environmental Toxicology, University of California, Rm 5241B Meyer Hall, 1 Shields Ave, Davis, CA, 95616, USA
| | - Hongjie Li
- Department of Anthropology, University of Illinois, Urbana-Champaign, USA
| | - Randall Haas
- Department of Anthropology, University of California, Davis, USA
| | | | - Dave Grant
- D&D Osteological Services, LLC, San Jose, CA, USA
| | - Michelle Salemi
- Proteomic Core Facility, Genome Center, University of California, Davis, CA, USA
| | - Charlene Nijmeh
- Muwekma Ohlone Tribe of the San Francisco Bay Area, Milpitas, CA, USA
| | - Monica Arellano
- Muwekma Ohlone Tribe of the San Francisco Bay Area, Milpitas, CA, USA
| | - Alan Leventhal
- Muwekma Ohlone Tribe of the San Francisco Bay Area, Milpitas, CA, USA.,Department of Anthropology, San Jose State University, San Jose, CA, USA
| | - Brett Phinney
- Proteomic Core Facility, Genome Center, University of California, Davis, CA, USA
| | - Brian F Byrd
- Far Western Anthropological Research Group, Inc, Davis, CA, USA
| | - Ripan S Malhi
- Program in Ecology, Evolution and Conservation Biology, University of Illinois, Urbana-Champaign, USA.,Department of Anthropology, University of Illinois, Urbana-Champaign, USA.,Carl R. Woese Institute for Genomic Biology, University of Illinois, Urbana-Champaign, USA
| | - Glendon Parker
- Department of Environmental Toxicology, University of California, Rm 5241B Meyer Hall, 1 Shields Ave, Davis, CA, 95616, USA.
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Petronijevic S, Stig S, Halstensen TS. Epitope mapping of anti‐amelogenin IgA in coeliac disease. Eur J Oral Sci 2020; 128:27-36. [DOI: 10.1111/eos.12672] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/24/2019] [Indexed: 12/13/2022]
Affiliation(s)
- Sanja Petronijevic
- Institute of Oral Biology Faculty of Dentistry University of Oslo Oslo Norway
| | - Solveig Stig
- Institute of Oral Biology Faculty of Dentistry University of Oslo Oslo Norway
| | - Trond S. Halstensen
- Institute of Oral Biology Faculty of Dentistry University of Oslo Oslo Norway
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Abstract
Background: Mechanical power generated via triceps surae muscle-tendon interaction during walking is important for walking performance. This interaction is made complex by distinct "subtendons" arising from the lateral and medial gastrocnemius (GAS) and soleus (SOL) muscles. Comparative data and our own in vivo evidence allude to a reduced capacity for sliding between adjacent subtendons compromising the Achilles tendon in old age. However, its unclear if and how these changes affect muscle contractile behavior.Objective: We investigated aging effects on triceps surae muscle-subtendon interaction using dual-probe ultrasound imaging during isolated muscle contractions. We hypothesized that, compared to young adults, older adults would have more uniform subtendon tissue displacements that are accompanied by anatomically consistent differences in GAS versus SOL muscle length change behavior.Materials and Methods: 9 younger subjects (age: 25.1 ± 5.6 years) and 10 older adult subjects (age: 74.3 ± 3.4 years) completed a series of ramped maximum isometric voluntary contractions at ankle angles spanning 0° (neutral) to 30° plantarflexion. Two linear array ultrasound transducers simultaneously recorded GAS and SOL fascicle kinematics and tissue displacements in their associated tendinous structures.Results: We revealed that older adults have more uniform subtendon tissue displacements that extend to anatomically consistent and potentially unfavorable changes in muscle contractile behavior - evidenced by smaller differences between gastrocnemius and soleus peak shortening during isometric force generation.Conclusions: These findings provide an important biomechanical basis for previously reported correlations between more uniform Achilles subtendon behavior and reduced ankle moment generation during waking in older adults.
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Affiliation(s)
- William H. Clark
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Chapel Hill, NC, USA
| | - Jason R. Franz
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Chapel Hill, NC, USA
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Pang L, Li X, Wang K, Tao Y, Cui T, Xu Q, Lin H. Interactions with the aquaporin 5 gene increase the susceptibility to molar-incisor hypomineralization. Arch Oral Biol 2019; 111:104637. [PMID: 31884335 DOI: 10.1016/j.archoralbio.2019.104637] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2019] [Revised: 12/14/2019] [Accepted: 12/18/2019] [Indexed: 12/31/2022]
Abstract
OBJECTIVE The aim of this study was to evaluate whether individual genetic factors involved in amelogenesis, the immune response and water channel proteins may increase the susceptibility to Molar-Incisor Hypomineralization (MIH) in Chinese children. DESIGN DNA samples were collected from 86 cases with MIH cases and 344 controls. Sixteen single-nucleotide polymorphisms (SNPs) were investigated. Logistic regression analysis was performed to assess association between SNPs and the risk of MIH. RESULTS Our results showed that the risk of MIH in the rs13115627-AA genotype carriers and the rs1784418-TT genotype carriers were significantly higher than that among those with the rs13115627-GG genotype (OR (95 % CI)) = 4.942 (0.658-37.131) and the rs1784418-CT genotype (OR (95 % CI)) = 2.023 (1.63-3.521). The population with the rs1800972-CC genotype and the rs1800972-C allele had a higher risk to develop MIH, OR (95 % CI) = 2.284 (1.267-4.115), OR (95 % CI) = 2.427 (1.493-3.953) respectively. In the Aquaporin 5(AQP5) gene, we individually analyzed two SNPs, rs1996315 and rs923911. We found no significant associations between them and MIH. However, in the analysis of the gene-gene interactions, we discovered a significant two-locus model (P = 0.023) involving rs1996315 and rs923911. Participants with the rs1996315-AG and rs923911-AC genotypes had the highest MIH risk, compared to participants with the rs1996315-GG and rs923911-CC genotypes, OR (95 % CI) = 3.603 (1.147-11.318). CONCLUSION This study showed that genetic variants in the AMBN, MMP20 and DEFB1 genes may contribute to MIH in the permanent dentition of children. Moreover, interactions among AQP5 gene may also increase the MIH susceptibility.
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Affiliation(s)
- Liangyue Pang
- Department of Preventive Dentistry, Guanghua School of Stomatology, Sun Yat-sen University, 56 Ling Yuan Road West, 510050 Guangzhou, China; Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, 510080, Guangzhou, China
| | - Xia Li
- Foshan Stomatology Hospital, School of Stomatology and Medicine, Foshan University, Foshan, China
| | - Ketian Wang
- Department of Preventive Dentistry, Guanghua School of Stomatology, Sun Yat-sen University, 56 Ling Yuan Road West, 510050 Guangzhou, China; Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, 510080, Guangzhou, China
| | - Ye Tao
- Department of Preventive Dentistry, Guanghua School of Stomatology, Sun Yat-sen University, 56 Ling Yuan Road West, 510050 Guangzhou, China; Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, 510080, Guangzhou, China
| | - Tianqiang Cui
- Foshan Stomatology Hospital, School of Stomatology and Medicine, Foshan University, Foshan, China
| | - Qiong Xu
- Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, 510080, Guangzhou, China.
| | - Huancai Lin
- Department of Preventive Dentistry, Guanghua School of Stomatology, Sun Yat-sen University, 56 Ling Yuan Road West, 510050 Guangzhou, China; Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, 510080, Guangzhou, China.
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11
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Racz R, Nagy A, Rakonczay Z, Dunavari EK, Gerber G, Varga G. Defense Mechanisms Against Acid Exposure by Dental Enamel Formation, Saliva and Pancreatic Juice Production. Curr Pharm Des 2019; 24:2012-2022. [PMID: 29769002 PMCID: PMC6225347 DOI: 10.2174/1381612824666180515125654] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 04/30/2018] [Accepted: 05/08/2018] [Indexed: 12/16/2022]
Abstract
The pancreas, the salivary glands and the dental enamel producing ameloblasts have marked developmental, structural and functional similarities. One of the most striking similarities is their bicarbonate-rich secretory product, serving acid neutralization. An important difference between them is that while pancreatic juice and saliva are delivered into a lumen where they can be collected and analyzed, ameloblasts produce locally precipitating hydroxyapatite which cannot be easily studied. Interestingly, the ion and protein secretion by the pancreas, the salivary glands, and maturation ameloblasts are all two-step processes, of course with significant differences too. As they all have to defend against acid exposure by producing extremely large quantities of bicarbonate, the failure of this function leads to deteriorating consequences. The aim of the present review is to describe and characterize the defense mechanisms of the pancreas, the salivary glands and enamel-producing ameloblasts against acid exposure and to compare their functional capabilities to do this by producing bicarbonate.
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Affiliation(s)
- Robert Racz
- Department of Oral Biology, Semmelweis University, Budapest, Hungary
| | - Akos Nagy
- Department of Dentistry, Oral and Maxillofacial Surgery, University of Pecs, Pecs, Hungary
| | - Zoltan Rakonczay
- Department of Pathophysiology, University of Szeged, Szeged, Hungary
| | - Erika Katalin Dunavari
- Department of Dentistry, Oral and Maxillofacial Surgery, University of Pecs, Pecs, Hungary
| | - Gabor Gerber
- Department of Anatomy, Histology and Embryology, Semmelweis University, Budapest, Hungary
| | - Gabor Varga
- Department of Oral Biology, Semmelweis University, Budapest, Hungary
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Lu X, Yang J, Zhao S, Liu S. Advances of Wnt signalling pathway in dental development and potential clinical application. Organogenesis 2019; 15:101-110. [PMID: 31482738 DOI: 10.1080/15476278.2019.1656996] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Wnt signalling pathway is widely studied in many processes of biological development, like embryogenesis, tissue homeostasis and wound repair. It is universally known that Wnt signalling pathway plays an important role in tooth development. Here, we summarized the function of Wnt signalling pathway during tooth initiation, crown morphogenesis, root formation, and discussed the therapeutic potential of Wnt modulators.
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Affiliation(s)
- Xi Lu
- Department of Stomatology, Huashan Hospital, Fudan University , Shanghai , P. R. China
| | - Jun Yang
- Department of Stomatology, Huashan Hospital, Fudan University , Shanghai , P. R. China
| | - Shouliang Zhao
- Department of Stomatology, Huashan Hospital, Fudan University , Shanghai , P. R. China
| | - Shangfeng Liu
- Department of Stomatology, Huashan Hospital, Fudan University , Shanghai , P. R. China
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13
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Wang P, Mao YM, Liu LN, Zhao CN, Li XM, Pan HF. Decreased Expression of Semaphorin 3A and Semaphorin 7A Levels and Its Association with Systemic Lupus Erythematosus. Immunol Invest 2019; 49:69-80. [PMID: 31412748 DOI: 10.1080/08820139.2019.1649280] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
A growing body of data suggests that semaphorins are involved in both normal and pathological immune responses, as well as autoimmune pathologies. To investigate the plasma semaphorin 3A (Sema3A) and semaphorin 7A (Sema7A) levels in systemic lupus erythematosus (SLE) patients and their correlation with clinical manifestations and laboratory indexes, a two-step method was applied. First, 80 SLE patients and 80 healthy controls were recruited for comparing serum Sema3A and Sema7A concentrations. Second, 40 rheumatoid arthritis (RA) patients and 40 sjögren's syndrome (SS) patients were then included as disease controls. Plasma Sema3A and Sema7A concentrations were detected by ELISA. There were significant differences in Sema3A and Sema7A among four groups. When compared to healthy controls, both Sema3A and Sema7A levels were decreased in SLE and increased in RA; increased Sema3A level and decreased Sema7A level were found in SS. There were significant differences in Sema3A concentration between SLE and RA, SLE and SS. Moreover, there were significant differences in Sema7A level between SLE and RA, SS and RA. However, no significant differences in Sema3A between SS and RA and no significant differences in Sema7A between SS and SLE were observed. Both plasma Sema3A and Sema7A levels were correlated with anti-SSA and IgM. Area under curve (AUC) of the receiver operating characteristic (ROC) curve for Sema3A and Sema7A were 0.535 (0.455-0.613) and 0.671 (0.594-0.742), respectively. Aberrant Sema3A and Sema7A expression and their clinical associations in SLE suggest their important role in this disease.
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Affiliation(s)
- Peng Wang
- Center for Genetic Epidemiology and Genomics, School of Public Health, Medical College of Soochow University, Suzhou, Jiangsu, China
| | - Yan-Mei Mao
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, Hefei, Anhui, China.,Department of Epidemiology, Anhui Province Key Laboratory of Major Autoimmune Diseases, Hefei, Anhui, China
| | - Li-Na Liu
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, Hefei, Anhui, China.,Department of Epidemiology, Anhui Province Key Laboratory of Major Autoimmune Diseases, Hefei, Anhui, China
| | - Chan-Na Zhao
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, Hefei, Anhui, China.,Department of Epidemiology, Anhui Province Key Laboratory of Major Autoimmune Diseases, Hefei, Anhui, China
| | - Xiao-Mei Li
- Department of Rheumatology and Immunology, Anhui Provincial Hospital, Hefei, Anhui, China
| | - Hai-Feng Pan
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, Hefei, Anhui, China.,Department of Epidemiology, Anhui Province Key Laboratory of Major Autoimmune Diseases, Hefei, Anhui, China
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14
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Lv X, Li X, Dai X, Liu M, Wu C, Song W, Wang J, Ren X, Cai Y. Investigation heme oxygenase-1 polymorphism with the pathogenesis of preeclampsia. Clin Exp Hypertens 2019; 42:167-170. [PMID: 30978117 DOI: 10.1080/10641963.2019.1601202] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Objectives: The involvement of oxidative stress in the pathophysiology of preeclampsia (PE) has been already suggested. In this present study, we aimed to investigate the association of the genetic frequency of heme oxygense-1 (HMOX1) polymorphism with PE in Chinese Han women.Methods: We researched the genetic distribution of rs2071746 polymorphism in HMOX1 by the TaqMan allelic discrimination real-time PCR between 1235 PE patients and 1720 healthy women.Results: We found there were't significant differences in the distribution of HMOX1 rs2071746 polymorphism in PE compared to the control group (rs2071746, genotype χ2 = 0.282, P = 0.869 and allele χ2 = 0.027, P = 0.869, OR = 1.009, 95% = 0.909-1.120).Conclusion: The rs2071746 polymorphism in HMOX1 might not be related to PE in Chinese women, although further investigations should be conducted to confirm our findings.
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Affiliation(s)
- Xianping Lv
- Department of Blood Transfusion, the First Affiliated Hospital of Zhengzhou University, Henan, China
| | - Xueying Li
- School of Nursing, Binzhou Polytechnic, Binzhou, China
| | - Xueli Dai
- Department of Obstetrical, Zibo Maternity and Child-care Hospital, Zibo, China
| | - Mengchun Liu
- Department of Intensive Care Unit, the Affiliated Hospital of Qingdao University, Qingdao, China
| | - Cuijiao Wu
- Department of Histology and Embryology, Qingdao University Medical College, Qingdao, China
| | - Weiqing Song
- Department of Clinical Laboratory, Qingdao Municipal Hospital (Group), Qingdao, China
| | - Jingli Wang
- Prenatal Diagnosis Center, the Affiliated Hospital of Qingdao University, Qingdao, China
| | - Xiaoyan Ren
- Prenatal Diagnosis Center, Department of Central Laboratory, Liaocheng People's Hospital, Liaocheng, China
| | - Yan Cai
- Prenatal Diagnosis Center, Maternity and Child Care of Jinan, Jinan, China
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15
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Yang X, Zhao G, Yan J, Xu R, Che C, Zheng H, Zhu G, Zhang J. Pannexin 1 Channels Contribute to IL-1β Expression via NLRP3/Caspase-1 Inflammasome in Aspergillus Fumigatus Keratitis. Curr Eye Res 2019; 44:716-725. [PMID: 30793631 DOI: 10.1080/02713683.2019.1584321] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Purpose: Pannexin 1 channels are deemed to play important roles in inflammation. However, there is limited information regarding their roles in fungal infection diseases, especially fungal keratitis. This study aimed to investigate the role of pannexin 1 channels in Aspergillus fumigatus (A. fumigatus) keratitis. Materials and Methods: Mouse models or immortalized human corneal epithelial cells (HCECs) were infected with or without A. fumigatus for given time. The expression of pannexin 1 channels was tested by qPCR, western blot and immunofluorescence staining. Mice of A. fumigatus keratitis were pretreated with carbenoxolone (CBX) or 2'(3')-O-(4-Benzoylbenzoyl) adenosine-5'-triphosphate (BzATP) to block or activate the opening of pannexin 1 channels respectively. The clinical score was recorded. Cornea tissues were examined for the downstream signals of pannexin 1 channels, including NLRP3, Caspase-1 and IL-1β, and myeloperoxidase (MPO) by PCR and ELISA. Data were analyzed with commercial data analysis software and a P < 0.05 was considered to be statistically significant. Results: Upon A. fumigatus infection, pannexin 1 expression increased at both the mRNA and the protein levels in mice corneas (P< 0.05, n = 3). Immunofluorescence indicated that pannexin 1 channels were mainly located in the corneal epithelial layer, and they were upregulated after A. fumigatus infection. In vitro, the same tendency was found at the mRNA and the protein levels in HCECs (P< 0.05, n = 8). In mouse model, blockage of pannexin 1 channels by CBX caused more severely keratitis. The downstream signals of pannexin 1 channels (NLRP3/Caspase-1/IL-1β) and MPO were down-regulated. Whereas activation the opening of pannexin 1 channels by BzATP reduced corneal infection with increased expression of Caspase-1 and IL-1β. Conclusions: Pannexin 1 channels play important roles in the regulation of progression and leucocytes aggregation during corneal A. fumigatus infection via the NLRP3/Caspase-1/IL-β pathway.
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Affiliation(s)
- Xuejiao Yang
- a Department of Ophthalmology , The Affiliated Hospital of Qingdao University , Qingdao , Shandong Province , China
| | - Guiqiu Zhao
- a Department of Ophthalmology , The Affiliated Hospital of Qingdao University , Qingdao , Shandong Province , China
| | - Junwei Yan
- b Department of Vascular Surgery , Huangdao Branch of the Affiliated Hospital of Qingdao University , Qingdao , Shandong Province , China
| | - Rui Xu
- a Department of Ophthalmology , The Affiliated Hospital of Qingdao University , Qingdao , Shandong Province , China
| | - Chengye Che
- a Department of Ophthalmology , The Affiliated Hospital of Qingdao University , Qingdao , Shandong Province , China
| | - Hengrui Zheng
- a Department of Ophthalmology , The Affiliated Hospital of Qingdao University , Qingdao , Shandong Province , China
| | - Guoqiang Zhu
- a Department of Ophthalmology , The Affiliated Hospital of Qingdao University , Qingdao , Shandong Province , China
| | - Jie Zhang
- a Department of Ophthalmology , The Affiliated Hospital of Qingdao University , Qingdao , Shandong Province , China
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16
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Čabarkapa V, Bogavac M, Jakovljević A, Pezo L, Nikolić A, Belopavlović Z, Mirjana D. Serum magnesium level in the first trimester of pregnancy as a predictor of pre-eclampsia – a pilot study. Hypertens Pregnancy 2018; 37:144-153. [DOI: 10.1080/10641955.2018.1494189] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Velibor Čabarkapa
- Faculty of Medicine, Department of Pathophysiology and Laboratory Medicine, University of Novi Sad, Novi Sad, Serbia
- Clinical Center of Vojvodina, Department of Laboratory Medicine, Novi Sad, Serbia
| | - Mirjana Bogavac
- Faculty of Medicine, Department of Gynaecology and Obstretics, University of Novi Sad, Novi Sad, Serbia
- Department of Gynaecology and Obstretics, Clinical Center of Vojvodina, Novi Sad, Serbia
| | - Ana Jakovljević
- Faculty of Medicine, Department of Pathophysiology and Laboratory Medicine, University of Novi Sad, Novi Sad, Serbia
- Clinical Center of Vojvodina, Department of Laboratory Medicine, Novi Sad, Serbia
| | - Lato Pezo
- Institute of General and Physical Chemistry, Engineering Department, University of Belgrade, Belgrade, Serbia
| | - Aleksandra Nikolić
- Department of Gynaecology and Obstretics, Clinical Center of Vojvodina, Novi Sad, Serbia
- Faculty of Medicine, Department of Pharmacy, University of Novi Sad, Novi Sad, Serbia
| | - Zoran Belopavlović
- Faculty of Medicine, Department of Gynaecology and Obstretics, University of Novi Sad, Novi Sad, Serbia
- Department of Gynaecology and Obstretics, Clinical Center of Vojvodina, Novi Sad, Serbia
| | - Djerić Mirjana
- Faculty of Medicine, Department of Pathophysiology and Laboratory Medicine, University of Novi Sad, Novi Sad, Serbia
- Clinical Center of Vojvodina, Department of Laboratory Medicine, Novi Sad, Serbia
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17
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Rathsam C, Farahani RM, Hains PG, Valova VA, Charadram N, Zoellner H, Swain M, Hunter N. Characterization of inter-crystallite peptides in human enamel rods reveals contribution by the Y allele of amelogenin. J Struct Biol 2018; 204:26-37. [PMID: 29959991 DOI: 10.1016/j.jsb.2018.06.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 06/19/2018] [Accepted: 06/21/2018] [Indexed: 11/18/2022]
Abstract
Proteins of the inter-rod sheath and peptides within the narrow inter-crystallite space of the rod structure are considered largely responsible for visco-elastic and visco-plastic properties of enamel. The present study was designed to investigate putative peptides of the inter-crystallite space. Entities of 1-6 kDa extracted from enamel rods of erupted permanent teeth were analysed by mass spectrometry (MS) and shown to comprise N-terminal amelogenin (AMEL) peptides either containing or not containing exon 4 product. Other dominant entities consisted of an N-terminal peptide from ameloblastin (AMBN) and a series of the most hydrophobic peptides from serum albumin (ALBN). Amelogenin peptides encoded by the Y-chromosome allele were strongly detected in Enamel from male teeth. Location of N-terminal AMEL peptides as well as AMBN and ALBN, between apatite crystallites, was disclosed by immunogold scanning electron microscopy (SEM). Density plots confirmed the relative abundance of these products including exon 4+ AMEL peptides that have greater capacity for binding to hydroxyapatite. Hydrophilic X and Y peptides encoded in exon 4 differ only in substitution of non-polar isoleucine in Y for polar threonine in X with reduced disruption of the hydrophobic N-terminal structure in the Y form. Despite similarity of X and Y alleles of AMEL the non-coding region upstream from exon 4 shows significant variation with implications for segregation of processing of transcripts from exon 4. Detection of fragments from multiple additional proteins including keratins (KER), fetuin A (FETUA), proteinases and proteinase inhibitors, likely reflect biochemical events during enamel formation.
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Affiliation(s)
- Catherine Rathsam
- Institute of Dental Research, Westmead Institute for Medical Research and Centre for Oral Health, Westmead, New South Wales, Australia.
| | - Ramin M Farahani
- Institute of Dental Research, Westmead Institute for Medical Research and Centre for Oral Health, Westmead, New South Wales, Australia; Faculty of Dentistry, The University of Sydney, New South Wales, Australia
| | - Peter G Hains
- Children's Medical Research Institute, The University of Sydney, Westmead, New South Wales, Australia
| | - Valentina A Valova
- Children's Medical Research Institute, The University of Sydney, Westmead, New South Wales, Australia
| | - Nattida Charadram
- Institute of Dental Research, Westmead Institute for Medical Research and Centre for Oral Health, Westmead, New South Wales, Australia; Faculty of Dentistry, The University of Sydney, New South Wales, Australia
| | - Hans Zoellner
- Faculty of Dentistry, The University of Sydney, New South Wales, Australia
| | - Michael Swain
- Faculty of Dentistry, The University of Sydney, New South Wales, Australia; Faculty of Dentistry, Kuwait University, Kuwait
| | - Neil Hunter
- Institute of Dental Research, Westmead Institute for Medical Research and Centre for Oral Health, Westmead, New South Wales, Australia; Faculty of Dentistry, The University of Sydney, New South Wales, Australia
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18
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Chu Q, Gao Y, Gao X, Dong Z, Song W, Xu Z, Xiang L, Wang Y, Zhang L, Li M, Gao Y. Ablation of Runx2 in Ameloblasts Suppresses Enamel Maturation in Tooth Development. Sci Rep 2018; 8:9594. [PMID: 29941908 PMCID: PMC6018461 DOI: 10.1038/s41598-018-27873-5] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Accepted: 06/11/2018] [Indexed: 11/21/2022] Open
Abstract
Runt-related transcription factor 2 (Runx2) is involved in the early stage of tooth development. However, only few studies have reported the role of Runx2 in enamel development, which may be attributed to that Runx2 full knockout mice cannot survive after birth. In the present study, we successfully established a Runx2-deficient mouse model using a conditional knockout (cKO) method. We observed a significant reduction in the degree of mineralization and the decreased size of enamel rods in cKO mice. Histological analysis showed the retained enamel proteins in enamel layer at maturation stage in cKO molars. Further analysis by qRT-PCR revealed that the expressions of genes encoding enamel structure proteins, such as amelogenin (AMELX), ameloblastin (AMBN) and enamelin (ENAM), were increased in cKO enamel organs. On the other hand, the expression of kallikrein-related peptidase-4 (KLK4) at the mRNA and protein levels was dramatically decreased from late secretory stage to maturation stage in cKO enamel organs, while the expression of matrix metalloproteinase-20 (MMP-20) was not significantly altered. Finally, immunohistochemistry indicated that the uptake of amelogenins by ameloblasts was significantly decreased in cKO mice. Taken together, Runx2 played critical roles in controlling enamel maturation by increasing synthesis of KLK4 and decreasing synthesis of AMELX, AMBN and ENAM.
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Affiliation(s)
- Qing Chu
- Department of Pediatrics and Preventive Dentistry, Hospital Affiliated to Binzhou Medical University, Binzhou, 256600, Shandong, China
| | - Yan Gao
- Department of Pediatrics and Preventive Dentistry, Hospital Affiliated to Binzhou Medical University, Binzhou, 256600, Shandong, China
| | - Xianhua Gao
- Department of Pediatrics and Preventive Dentistry, Hospital Affiliated to Binzhou Medical University, Binzhou, 256600, Shandong, China
| | - Zhiheng Dong
- Department of Pediatrics and Preventive Dentistry, Hospital Affiliated to Binzhou Medical University, Binzhou, 256600, Shandong, China
| | - Wenying Song
- Department of Pediatrics and Preventive Dentistry, Hospital Affiliated to Binzhou Medical University, Binzhou, 256600, Shandong, China
| | - Zhenzhen Xu
- Department of Pediatrics and Preventive Dentistry, Hospital Affiliated to Binzhou Medical University, Binzhou, 256600, Shandong, China
| | - Lili Xiang
- Department of Pediatrics and Preventive Dentistry, Hospital Affiliated to Binzhou Medical University, Binzhou, 256600, Shandong, China
| | - Yumin Wang
- Institute of Stomatology, Binzhou Medical University, Yantai, 255000, Shandong, China
| | - Li Zhang
- Institute of Stomatology, Binzhou Medical University, Yantai, 255000, Shandong, China
| | - Mingyu Li
- Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Ninth People's Hospital, Faculty of Medicine, Shanghai Jiao Tong University, Shanghai, 200011, China
| | - Yuguang Gao
- Department of Pediatrics and Preventive Dentistry, Hospital Affiliated to Binzhou Medical University, Binzhou, 256600, Shandong, China.
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19
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Pandya M, Liu H, Dangaria SJ, Zhu W, Li LL, Pan S, Abufarwa M, Davis RG, Guggenheim S, Keiderling T, Luan X, Diekwisch TGH. Integrative Temporo-Spatial, Mineralogic, Spectroscopic, and Proteomic Analysis of Postnatal Enamel Development in Teeth with Limited Growth. Front Physiol 2017; 8:793. [PMID: 29114228 PMCID: PMC5660681 DOI: 10.3389/fphys.2017.00793] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 09/27/2017] [Indexed: 12/11/2022] Open
Abstract
Tooth amelogenesis is a complex process beginning with enamel organ cell differentiation and enamel matrix secretion, transitioning through changes in ameloblast polarity, cytoskeletal, and matrix organization, that affects crucial biomineralization events such as mineral nucleation, enamel crystal growth, and enamel prism organization. Here we have harvested the enamel organ including the pliable enamel matrix of postnatal first mandibular mouse molars during the first 8 days of tooth enamel development to conduct a step-wise cross-sectional analysis of the changes in the mineral and protein phase. Mineral phase diffraction pattern analysis using single-crystal, powder sample X-ray diffraction analysis indicated conversion of calcium phosphate precursors to partially fluoride substituted hydroxyapatite from postnatal day 4 (4 dpn) onwards. Attenuated total reflectance spectra (ATR) revealed a substantial elevation in phosphate and carbonate incorporation as well as structural reconfiguration between postnatal days 6 and 8. Nanoscale liquid chromatography coupled with tandem mass spectrometry (nanoLC-MS/MS) demonstrated highest protein counts for ECM/cell surface proteins, stress/heat shock proteins, and alkaline phosphatase on postnatal day 2, high counts for ameloblast cytoskeletal proteins such as tubulin β5, tropomyosin, β-actin, and vimentin on postnatal day 4, and elevated levels of cofilin-1, calmodulin, and peptidyl-prolyl cis-trans isomerase on day 6. Western blot analysis of hydrophobic enamel proteins illustrated continuously increasing amelogenin levels from 1 dpn until 8 dpn, while enamelin peaked on days 1 and 2 dpn, and ameloblastin on days 1-5 dpn. In summary, these data document the substantial changes in the enamel matrix protein and mineral phase that take place during postnatal mouse molar amelogenesis from a systems biological perspective, including (i) relatively high levels of matrix protein expression during the early secretory stage on postnatal day 2, (ii) conversion of calcium phosphates to apatite, peak protein folding and stress protein counts, and increased cytoskeletal protein levels such as actin and tubulin on day 4, as well as (iii) secondary structure changes, isomerase activity, highest amelogenin levels, and peak phosphate/carbonate incorporation between postnatal days 6 and 8. Together, this study provides a baseline for a comprehensive understanding of the mineralogic and proteomic events that contribute to the complexity of mammalian tooth enamel development.
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Affiliation(s)
- Mirali Pandya
- Texas A&M Center for Craniofacial Research and Diagnosis, Dallas, TX, United States
| | - Hui Liu
- Brodie Laboratory for Craniofacial Genetics, University of Illinois at Chicago, Chicago, IL, United States
| | - Smit J Dangaria
- Brodie Laboratory for Craniofacial Genetics, University of Illinois at Chicago, Chicago, IL, United States
| | - Weiying Zhu
- Department of Chemistry, University of Illinois at Chicago, Chicago, IL, United States
| | - Leo L Li
- Medicine, University of Michigan, Ann Arbor, MI, United States
| | - Shuang Pan
- Brodie Laboratory for Craniofacial Genetics, University of Illinois at Chicago, Chicago, IL, United States
| | - Moufida Abufarwa
- Texas A&M Center for Craniofacial Research and Diagnosis, Dallas, TX, United States
| | - Roderick G Davis
- Proteomics Center of Excellence, Northwestern University, Evanston, IL, United States
| | - Stephen Guggenheim
- Department of Earth and Environmental Sciences, University of Illinois at Chicago, Chicago, IL, United States
| | | | - Xianghong Luan
- Brodie Laboratory for Craniofacial Genetics, University of Illinois at Chicago, Chicago, IL, United States
| | - Thomas G H Diekwisch
- Texas A&M Center for Craniofacial Research and Diagnosis, Dallas, TX, United States
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20
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Pandya M, Lin T, Li L, Allen MJ, Jin T, Luan X, Diekwisch TGH. Posttranslational Amelogenin Processing and Changes in Matrix Assembly during Enamel Development. Front Physiol 2017; 8:790. [PMID: 29089900 PMCID: PMC5651044 DOI: 10.3389/fphys.2017.00790] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 09/26/2017] [Indexed: 01/20/2023] Open
Abstract
The extracellular tooth enamel matrix is a unique, protein-rich environment that provides the structural basis for the growth of long and parallel oriented enamel crystals. Here we have conducted a series of in vivo and in vitro studies to characterize the changes in matrix shape and organization that take place during the transition from ameloblast intravesicular matrices to extracellular subunit compartments and pericrystalline sheath proteins, and correlated these changes with stages of amelogenin matrix protein posttranslational processing. Our transmission electron microscopic studies revealed a 2.5-fold difference in matrix subunit compartment dimensions between secretory vesicle and extracellular enamel protein matrix as well as conformational changes in matrix structure between vesicles, stippled materials, and pericrystalline matrix. Enamel crystal growth in organ culture demonstrated granular mineral deposits associated with the enamel matrix framework, dot-like mineral deposits along elongating initial enamel crystallites, and dramatic changes in enamel matrix configuration following the onset of enamel crystal formation. Atomic force micrographs provided evidence for the presence of both linear and hexagonal/ring-shaped full-length recombinant amelogenin protein assemblies on mica surfaces, while nickel-staining of the N-terminal amelogenin N92 His-tag revealed 20 nm diameter oval and globular amelogenin assemblies in N92 amelogenin matrices. Western blot analysis comparing loosely bound and mineral-associated protein fractions of developing porcine enamel organs, superficial and deep enamel layers demonstrated (i) a single, full-length amelogenin band in the enamel organ followed by 3 kDa cleavage upon entry into the enamel layer, (ii) a close association of 8–16 kDa C-terminal amelogenin cleavage products with the growing enamel apatite crystal surface, and (iii) a remaining pool of N-terminal amelogenin fragments loosely retained between the crystalline phases of the deep enamel layer. Together, our data establish a temporo-spatial correlation between amelogenin protein processing and the changes in enamel matrix configuration that take place during the transition from intracellular vesicle compartments to extracellular matrix assemblies and the formation of protein coats along elongating apatite crystal surfaces. In conclusion, our study suggests that enzymatic cleavage of the amelogenin enamel matrix protein plays a key role in the patterning of the organic matrix framework as it affects enamel apatite crystal growth and habit.
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Affiliation(s)
- Mirali Pandya
- Texas A&M Center for Craniofacial Research and Diagnosis, Dallas, TX, United States
| | - Tiffani Lin
- UCLA School of Dentistry, Los Angeles, CA, United States.,Brodie Laboratory for Craniofacial Genetics, University of Illinois at Chicago, Chicago, IL, United States
| | - Leo Li
- Brodie Laboratory for Craniofacial Genetics, University of Illinois at Chicago, Chicago, IL, United States.,University of Michigan Medical School, Ann Arbor, MI, United States
| | | | - Tianquan Jin
- Brodie Laboratory for Craniofacial Genetics, University of Illinois at Chicago, Chicago, IL, United States.,Biocytogen, Worcester, MA, United States
| | - Xianghong Luan
- Brodie Laboratory for Craniofacial Genetics, University of Illinois at Chicago, Chicago, IL, United States
| | - Thomas G H Diekwisch
- Texas A&M Center for Craniofacial Research and Diagnosis, Dallas, TX, United States.,Brodie Laboratory for Craniofacial Genetics, University of Illinois at Chicago, Chicago, IL, United States
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21
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Varga G, DenBesten P, Rácz R, Zsembery Á. Importance of bicarbonate transport in pH control during amelogenesis - need for functional studies. Oral Dis 2017; 24:879-890. [PMID: 28834043 DOI: 10.1111/odi.12738] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Accepted: 08/13/2017] [Indexed: 12/27/2022]
Abstract
Dental enamel, the hardest mammalian tissue, is produced by ameloblasts. Ameloblasts show many similarities to other transporting epithelia although their secretory product, the enamel matrix, is quite different. Ameloblasts direct the formation of hydroxyapatite crystals, which liberate large quantities of protons that then need to be buffered to allow mineralization to proceed. Buffering requires a tight pH regulation and secretion of bicarbonate by ameloblasts. Many investigations have used immunohistochemical and knockout studies to determine the effects of these genes on enamel formation, but up till recently very little functional data were available for mineral ion transport. To address this, we developed a novel 2D in vitro model using HAT-7 ameloblast cells. HAT-7 cells can be polarized and develop functional tight junctions. Furthermore, they are able to accumulate bicarbonate ions from the basolateral to the apical fluid spaces. We propose that in the future, the HAT-7 2D system along with similar cellular models will be useful to functionally model ion transport processes during amelogenesis. Additionally, we also suggest that similar approaches will allow a better understanding of the regulation of the cycling process in maturation-stage ameloblasts, and the pH sensory mechanisms, which are required to develop sound, healthy enamel.
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Affiliation(s)
- G Varga
- Department of Oral Biology, Semmelweis University, Budapest, Hungary
| | - P DenBesten
- Department of Orofacial Sciences, University of California, San Francisco, CA, USA
| | - R Rácz
- Department of Oral Biology, Semmelweis University, Budapest, Hungary
| | - Á Zsembery
- Department of Oral Biology, Semmelweis University, Budapest, Hungary
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22
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Kryza T, Silva LM, Bock N, Fuhrman-Luck RA, Stephens CR, Gao J, Samaratunga H, Lawrence MG, Hooper JD, Dong Y, Risbridger GP, Clements JA. Kallikrein-related peptidase 4 induces cancer-associated fibroblast features in prostate-derived stromal cells. Mol Oncol 2017; 11:1307-1329. [PMID: 28510269 PMCID: PMC5623815 DOI: 10.1002/1878-0261.12075] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Revised: 04/11/2017] [Accepted: 04/27/2017] [Indexed: 01/09/2023] Open
Abstract
The reciprocal communication between cancer cells and their microenvironment is critical in cancer progression. Although involvement of cancer‐associated fibroblasts (CAF) in cancer progression is long established, the molecular mechanisms leading to differentiation of CAFs from normal fibroblasts are poorly understood. Here, we report that kallikrein‐related peptidase‐4 (KLK4) promotes CAF differentiation. KLK4 is highly expressed in prostate epithelial cells of premalignant (prostatic intraepithelial neoplasia) and malignant lesions compared to normal prostate epithelia, especially at the peristromal interface. KLK4 induced CAF‐like features in the prostate‐derived WPMY1 normal stromal cell line, including increased expression of alpha‐smooth muscle actin, ESR1 and SFRP1. KLK4 activated protease‐activated receptor‐1 in WPMY1 cells increasing expression of several factors (FGF1, TAGLN, LOX, IL8, VEGFA) involved in prostate cancer progression. In addition, KLK4 induced WPMY1 cell proliferation and secretome changes, which in turn stimulated HUVEC cell proliferation that could be blocked by a VEGFA antibody. Importantly, the genes dysregulated by KLK4 treatment of WPMY1 cells were also differentially expressed between patient‐derived CAFs compared to matched nonmalignant fibroblasts and were further increased by KLK4 treatment. Taken together, we propose that epithelial‐derived KLK4 promotes tumour progression by actively promoting CAF differentiation in the prostate stromal microenvironment.
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Affiliation(s)
- Thomas Kryza
- Australian Prostate Cancer Research Centre - Queensland, Translational Research Institute, Queensland University of Technology (QUT), Woolloongabba, Australia.,Institute of Health and Biomedical Innovation and School of Biomedical Sciences, Queensland University of Technology (QUT), Kelvin Grove, Australia
| | - Lakmali M Silva
- Institute of Health and Biomedical Innovation and School of Biomedical Sciences, Queensland University of Technology (QUT), Kelvin Grove, Australia
| | - Nathalie Bock
- Australian Prostate Cancer Research Centre - Queensland, Translational Research Institute, Queensland University of Technology (QUT), Woolloongabba, Australia.,Institute of Health and Biomedical Innovation and School of Biomedical Sciences, Queensland University of Technology (QUT), Kelvin Grove, Australia
| | - Ruth A Fuhrman-Luck
- Australian Prostate Cancer Research Centre - Queensland, Translational Research Institute, Queensland University of Technology (QUT), Woolloongabba, Australia.,Institute of Health and Biomedical Innovation and School of Biomedical Sciences, Queensland University of Technology (QUT), Kelvin Grove, Australia
| | - Carson R Stephens
- Australian Prostate Cancer Research Centre - Queensland, Translational Research Institute, Queensland University of Technology (QUT), Woolloongabba, Australia.,Institute of Health and Biomedical Innovation and School of Biomedical Sciences, Queensland University of Technology (QUT), Kelvin Grove, Australia
| | - Jin Gao
- Regenerative Dentistry and Oral Biology, Oral Health Centre, University of Queensland, Herston, Australia
| | - Hema Samaratunga
- Aquesta Pathology, Toowong, Australia.,School of Medicine, University of Queensland, Herston, Australia
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- Australian Prostate Cancer BioResource, The Prostate Cancer Research Program, Monash University, Clayton, Australia
| | - Mitchell G Lawrence
- Prostate Research Group, Cancer Program - Biomedicine Discovery Institute Department of Anatomy and Developmental Biology, Monash Partners Comprehensive Cancer Consortium, Monash University, Clayton, Australia
| | - John D Hooper
- Cancer Biology and Care Program, Translational Research Institute, Mater Research Institute - The University of Queensland, Woolloongabba, Australia
| | - Ying Dong
- Institute of Health and Biomedical Innovation and School of Biomedical Sciences, Queensland University of Technology (QUT), Kelvin Grove, Australia
| | - Gail P Risbridger
- Prostate Research Group, Cancer Program - Biomedicine Discovery Institute Department of Anatomy and Developmental Biology, Monash Partners Comprehensive Cancer Consortium, Monash University, Clayton, Australia.,Prostate Cancer Translational Research Program, Cancer Research Division, Peter MacCallum Cancer Centre, Parkville, Australia.,Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, Australia
| | - Judith A Clements
- Australian Prostate Cancer Research Centre - Queensland, Translational Research Institute, Queensland University of Technology (QUT), Woolloongabba, Australia.,Institute of Health and Biomedical Innovation and School of Biomedical Sciences, Queensland University of Technology (QUT), Kelvin Grove, Australia
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23
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Elucidating the evolution of hominid dentition in the age of phenomics, modularity, and quantitative genetics. Ann Anat 2016; 203:3-11. [DOI: 10.1016/j.aanat.2015.05.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2014] [Revised: 05/17/2015] [Accepted: 05/18/2015] [Indexed: 12/11/2022]
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24
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Castiblanco GA, Rutishauser D, Ilag LL, Martignon S, Castellanos JE, Mejía W. Identification of proteins from human permanent erupted enamel. Eur J Oral Sci 2015; 123:390-5. [PMID: 26432388 DOI: 10.1111/eos.12214] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/15/2015] [Indexed: 11/28/2022]
Abstract
Proteins from the extracellular matrix of enamel are highly specific and necessary for proper enamel formation. Most proteins are removed from the matrix by enamel proteases before complete mineralization is achieved; however, some residual protein fragments persist in the mineralized matrix of erupted enamel. So far, only amelogenin peptides obtained by traditional bottom-up proteomics have been recovered and identified in human permanent erupted enamel. In this study, we hypothesize that other enamel-specific proteins are also found in human permanent enamel, by analysing human erupted third molars. Pulverized enamel was used to extract proteins, and the protein extract was subjected directly to liquid-chromatography coupled to tandem mass spectrometry (LC-MS/MS) without a previous trypsin-digestion step. Amelogenin and non-amelogenin proteins (ameloblastin and enamelin) were succesfully identified. The sequences of the naturally occurring peptides of these proteins are reported, finding in particular that most of the peptides from the amelogenin X-isoform come from the tyrosine-rich amelogenin peptide (TRAP) and that some were identified in all specimens. In conclusion, our LC-MS/MS method without trypsin digestion increased the coverage of identification of the enamel proteome from a few amelogenin peptides to a higher number of peptides from three enamel-specific proteins.
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Affiliation(s)
| | - Dorothea Rutishauser
- Department of Medical Biochemistry and Biophysics, Karolinska Institute, Stockholm, Sweden
| | - Leopold L Ilag
- Department of Environmental Science and Analytical Chemistry, Stockholm University, Stockholm, Sweden
| | | | | | - Wilson Mejía
- UNICA - Caries Research Unit, Universidad El Bosque, Bogotá, Colombia
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25
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Varga G, Kerémi B, Bori E, Földes A. Function and repair of dental enamel - Potential role of epithelial transport processes of ameloblasts. Pancreatology 2015; 15:S55-60. [PMID: 25747281 DOI: 10.1016/j.pan.2015.01.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Accepted: 01/28/2015] [Indexed: 12/11/2022]
Abstract
The hardest mammalian tissue, dental enamel is produced by ameloblasts, which are electrolyte-transporting epithelial cells. Although the end product is very different, they show many similarities to transporting epithelia of the pancreas, salivary glands and kidney. Enamel is produced in a multi-step epithelial secretory process that features biomineralization which is an interplay of secreted ameloblast specific proteins and the time-specific transport of minerals, protons and bicarbonate. First, "secretory" ameloblasts form the entire thickness of the enamel layer, but with low mineral content. Then they differentiate into "maturation" ameloblasts, which remove organic matrix from the enamel and in turn further build up hydroxyapatite crystals. The protons generated by hydroxyapatite formation need to be buffered, otherwise enamel will not attain full mineralization. Buffering requires a tight pH regulation and secretion of bicarbonate by ameloblasts. The whole process has been the focus of many immunohistochemical and gene knock-out studies, but, perhaps surprisingly, no functional data existed for mineral ion transport by ameloblasts. However, recent studies including ours provided a better insight for molecular mechanism of mineral formation. The secretory regulation is not completely known as yet, but its significance is crucial. Impairing regulation retards or prevents completion of enamel mineralization and results in the development of hypomineralized enamel that easily erodes after dental eruption. Factors that impair this function are fluoride and disruption of pH regulators. Revealing these factors may eventually lead to the treatment of enamel hypomineralization related to genetic or environmentally induced malformation.
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Affiliation(s)
- Gábor Varga
- Department of Oral Biology, Semmelweis University, Budapest, Hungary.
| | - Beáta Kerémi
- Department of Oral Biology, Semmelweis University, Budapest, Hungary
| | - Erzsébet Bori
- Department of Oral Biology, Semmelweis University, Budapest, Hungary
| | - Anna Földes
- Department of Oral Biology, Semmelweis University, Budapest, Hungary
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