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Delgado S, Fernandez-Trujillo MA, Houée G, Silvent J, Liu X, Corre E, Sire JY. Expression of 20 SCPP genes during tooth and bone mineralization in Senegal bichir. Dev Genes Evol 2023; 233:91-106. [PMID: 37410100 DOI: 10.1007/s00427-023-00706-w] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Accepted: 06/19/2023] [Indexed: 07/07/2023]
Abstract
The African bichir (Polypterus senegalus) is a living representative of Polypteriformes. P. senegalus possesses teeth composed of dentin covered by an enameloid cap and a layer of collar enamel on the tooth shaft, as in lepisosteids. A thin layer of enamel matrix can also be found covering the cap enameloid after its maturation and during the collar enamel formation. Teleosts fish do not possess enamel; teeth are protected by cap and collar enameloid, and inversely in sarcopterygians, where teeth are only covered by enamel, with the exception of the cap enameloid in teeth of larval urodeles. The presence of enameloid and enamel in the teeth of the same organism is an opportunity to solve the evolutionary history of the presence of enamel/enameloid in basal actinopterygians. In silico analyses of the jaw transcriptome of a juvenile bichir provided twenty SCPP transcripts. They included enamel, dentin, and bone-specific SCPPs known in sarcopterygians and several actinopterygian-specific SCPPs. The expression of these 20 genes was investigated by in situ hybridizations on jaw sections during tooth and dentary bone formation. A spatiotemporal expression patterns were established and compared with previous studies of SCPP gene expression during enamel/enameloid and bone formation. Similarities and differences were highlighted, and several SCPP transcripts were found specifically expressed during tooth or bone formation suggesting either conserved or new functions of these SCPPs.
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Affiliation(s)
- S Delgado
- Sorbonne Université, MNHN, CNRS, EPHE, Institut Systématique Évolution Biodiversité, ISYEB, Equipe Homologies, 75005, Paris, France.
| | - M A Fernandez-Trujillo
- Sorbonne Université, CNRS, Institut de Biologie Paris-Seine, UMR 7138, Equipe Evolution et Développement du Squelette, 75005, Paris, France
| | - G Houée
- Sorbonne Université, Muséum National d'Histoire Naturelle, CNRS, CR2P (Centre de Recherche en Paléontologie - Paris), UMR 7207, Equipe Formes, Structures et Fonctions, 43 rue Buffon, 75005, Paris, France
| | - J Silvent
- Sorbonne Université, CNRS, Institut de Biologie Paris-Seine, UMR 7138, Equipe Evolution et Développement du Squelette, 75005, Paris, France
| | - X Liu
- Sorbonne Université - CNRS, FR2424, Station Biologique de Roscoff, Plateforme ABiMS (Analysis and Bioinformatics for Marine Science), 29680, Roscoff, France
| | - E Corre
- Sorbonne Université - CNRS, FR2424, Station Biologique de Roscoff, Plateforme ABiMS (Analysis and Bioinformatics for Marine Science), 29680, Roscoff, France
| | - J Y Sire
- Sorbonne Université, CNRS, Institut de Biologie Paris-Seine, UMR 7138, Equipe Evolution et Développement du Squelette, 75005, Paris, France
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Abstract
In bony vertebrates, skeletal mineralization relies on the secretory calcium-binding phosphoproteins (Scpp) family whose members are acidic extracellular proteins posttranslationally regulated by the Fam20°C kinase. As scpp genes are absent from the elephant shark genome, they are currently thought to be specific to bony fishes (osteichthyans). Here, we report a scpp gene present in elasmobranchs (sharks and rays) that evolved from local tandem duplication of sparc-L 5′ exons and show that both genes experienced recent gene conversion in sharks. The elasmobranch scpp is remarkably similar to the osteichthyan scpp members as they share syntenic and gene structure features, code for a conserved signal peptide, tyrosine-rich and aspartate/glutamate-rich regions, and harbor putative Fam20°C phosphorylation sites. In addition, the catshark scpp is coexpressed with sparc-L and fam20°C in tooth and scale ameloblasts, similarly to some osteichthyan scpp genes. Despite these strong similarities, molecular clock and phylogenetic data demonstrate that the elasmobranch scpp gene originated independently from the osteichthyan scpp gene family. Our study reveals convergent events at the sparc-L locus in the two sister clades of jawed vertebrates, leading to parallel diversification of the skeletal biomineralization toolkit. The molecular evolution of sparc-L and its coexpression with fam20°C in catshark ameloblasts provides a unifying genetic basis that suggests that all convergent scpp duplicates inherited similar features from their sparc-L precursor. This conclusion supports a single origin for the hypermineralized outer odontode layer as produced by an ancestral developmental process performed by Sparc-L, implying the homology of the enamel and enameloid tissues in all vertebrates.
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Affiliation(s)
- Nicolas Leurs
- Institut des Sciences de l'Evolution de Montpellier, ISEM, Univ Montpellier, CNRS, IRD, EPHE, Montpellier, France
| | - Camille Martinand-Mari
- Institut des Sciences de l'Evolution de Montpellier, ISEM, Univ Montpellier, CNRS, IRD, EPHE, Montpellier, France
| | - Sylvain Marcellini
- Departamento de Biología Celular, Facultad de Ciencias Biológicas, Universidad de Concepción, Chile
| | - Mélanie Debiais-Thibaud
- Institut des Sciences de l'Evolution de Montpellier, ISEM, Univ Montpellier, CNRS, IRD, EPHE, Montpellier, France
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Fellah C, Douillard T, Maire E, Meille S, Reynard B, Cuny G. 3D microstructural study of selachimorph enameloid evolution. J Struct Biol 2020; 213:107664. [PMID: 33221390 DOI: 10.1016/j.jsb.2020.107664] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 11/12/2020] [Accepted: 11/14/2020] [Indexed: 10/22/2022]
Abstract
Enameloid, the hyper-mineralized tissue covering shark teeth is a complex structure resulting from both ameloblast and odontoblast activity. The way these two types of cells interact to set up this tissue is not fully understood and results in the formation of subunits in the enameloid: the Single Crystallite Enameloid (SCE) and the Bundled Crystallite Enameloid (BCE). Using the Focused Ion Beam Nanotomography (FIB-nt), 3D images were produced to assess the relationship between the SCE and BCE of one fossil and one recent neoselachian shark teeth. 3D analysis of crystallite bundles reveals a strong connection between the crystallites forming the SCE and those forming the bundles of the Radial Bundle Enameloid (RBE), a component of the BCE, although it has been suggested that SCE and BCE have a different origin: epithelial for the SCE and mesenchymal for the BCE. Another significant result of the use of FIB-nt is the visualization of frequent branching among the radial bundles forming the RBE, including horizontal link between adjacent bundles. FIB-nt demonstrates therefore a strong potential to decipher the complex evolution of hyper-mineralised tissue in shark teeth, and, therefore, to better understand the evolution of tooth structure among basal Gnathostomes.
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Affiliation(s)
- C Fellah
- Université de Lyon, ENS Lyon, Université Lyon 1, CNRS, LGL-TPE, F-69007 Lyon, France.
| | - T Douillard
- Université de Lyon, INSA-Lyon, UMR CNRS 5510 MATEIS, Villeurbanne Cedex, France
| | - E Maire
- Université de Lyon, INSA-Lyon, UMR CNRS 5510 MATEIS, Villeurbanne Cedex, France
| | - S Meille
- Université de Lyon, INSA-Lyon, UMR CNRS 5510 MATEIS, Villeurbanne Cedex, France
| | - B Reynard
- Université de Lyon, ENS Lyon, Université Lyon 1, CNRS, LGL-TPE, F-69007 Lyon, France
| | - G Cuny
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR5023 LEHNA, F-69622, Villeurbanne, France
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Rosa ACG, Teixeira LN, Passador-Santos F, Furuse C, Montalli VÂM, de Araújo NS, de Araújo VC. Benign odontogenic ghost cell lesions revisited and new considerations on dysplastic dentin. Clin Oral Investig 2019; 23:4335-4343. [PMID: 30911844 DOI: 10.1007/s00784-019-02863-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [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: 11/26/2018] [Accepted: 02/18/2019] [Indexed: 02/07/2023]
Abstract
OBJECTIVES This study aimed to revisit benign odontogenic ghost cell lesions (BOGCL) by hematoxylin and eosin staining and immunohistochemistry. MATERIALS AND METHODS Thirty cases of calcifying odontogenic cyst (COC) and 6 cases of dentinogenic ghost cell tumor (DGCT) were selected for histopathological and immunohistochemical analysis. Sections stained for cytokeratin (K) 14, K-19, amelogenin, collagen type 1 (COL-1), and dentin matrix acidic phosphoprotein 1 (DMP-1) were evaluated using qualitative analysis. Sections stained for Ki-67 and minichromosome maintenance protein-2 (MCM-2) were evaluated using semi-quantitative analysis. RESULTS A morphologic overlap was noticed in all BOGCL. Moreover, no differences were detected in the expression of K-14 and K-19. The expression of proliferative markers Ki-67 and MCM-2 was similar between cystic and tumor lesions (p > .05). The presence of COL-1 and absence of amelogenin in the so-called dysplastic dentin, associated with its histologic pattern, suggest that this is in fact an enameloid-like tissue. CONCLUSIONS The dysplastic dentin should be considered an enameloid-like tissue in these lesions. CLINICAL RELEVANCE The similarity in histology, protein expression, and proliferative marker indices between COC and DGCT suggest that they are a sole entity and likely represent types of the same neoplasia.
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Affiliation(s)
- Ana Cláudia Garcia Rosa
- School of Medicine, Federal University of Tocantins, Quadra 109 Norte, Avenida NS-15, ALCNO-14, Plano Diretor Norte, Palmas, Tocantins, 77001-090, Brazil. .,Faculty of Human and Economics and Health Sciences ITPAC, School of Medicine and Dentistry, Palmas, TO, Brazil.
| | - Lucas Novaes Teixeira
- São Leopoldo Mandic Institute and Research Center, Oral Pathology, Campinas, SP, Brazil
| | | | - Cristiane Furuse
- Pathology and Clinical Propaedeutics, São Paulo State University, Araçatuba, SP, Brazil
| | | | - Ney Soares de Araújo
- São Leopoldo Mandic Institute and Research Center, Oral Pathology, Campinas, SP, Brazil
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Enault S, Muñoz D, Simion P, Ventéo S, Sire JY, Marcellini S, Debiais-Thibaud M. Evolution of dental tissue mineralization: an analysis of the jawed vertebrate SPARC and SPARC-L families. BMC Evol Biol 2018; 18:127. [PMID: 30165817 PMCID: PMC6117938 DOI: 10.1186/s12862-018-1241-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Accepted: 08/15/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The molecular bases explaining the diversity of dental tissue mineralization across gnathostomes are still poorly understood. Odontodes, such as teeth and body denticles, are serial structures that develop through deployment of a gene regulatory network shared between all gnathostomes. Dentin, the inner odontode mineralized tissue, is produced by odontoblasts and appears well-conserved through evolution. In contrast, the odontode hypermineralized external layer (enamel or enameloid) produced by ameloblasts of epithelial origin, shows extensive structural variations. As EMP (Enamel Matrix Protein) genes are as yet only found in osteichthyans where they play a major role in the mineralization of teeth and others skeletal organs, our understanding of the molecular mechanisms leading to the mineralized odontode matrices in chondrichthyans remains virtually unknown. RESULTS We undertook a phylogenetic analysis of the SPARC/SPARC-L gene family, from which the EMPs are supposed to have arisen, and examined the expression patterns of its members and of major fibrillar collagens in the spotted catshark Scyliorhinus canicula, the thornback ray Raja clavata, and the clawed frog Xenopus tropicalis. Our phylogenetic analyses reveal that the single chondrichthyan SPARC-L gene is co-orthologous to the osteichthyan SPARC-L1 and SPARC-L2 paralogues. In all three species, odontoblasts co-express SPARC and collagens. In contrast, ameloblasts do not strongly express collagen genes but exhibit strikingly similar SPARC-L and EMP expression patterns at their maturation stage, in the examined chondrichthyan and osteichthyan species, respectively. CONCLUSIONS A well-conserved odontoblastic collagen/SPARC module across gnathostomes further confirms dentin homology. Members of the SPARC-L clade evolved faster than their SPARC paralogues, both in terms of protein sequence and gene duplication. We uncover an osteichthyan-specific duplication that produced SPARC-L1 (subsequently lost in pipidae frogs) and SPARC-L2 (independently lost in teleosts and tetrapods).Our results suggest the ameloblastic expression of the single chondrichthyan SPARC-L gene at the maturation stage reflects the ancestral gnathostome situation, and provide new evidence in favor of the homology of enamel and enameloids in all gnathostomes.
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Affiliation(s)
- Sébastien Enault
- Institut des Sciences de l’Evolution de Montpellier, ISEM, Univ Montpellier, CNRS, IRD, EPHE, Université Montpellier, UMR5554 Montpellier, France
| | - David Muñoz
- Laboratory of Development and Evolution, Department of Cell Biology, Faculty of Biological Sciences, University of Concepción, Concepción, Chile
| | - Paul Simion
- Institut des Sciences de l’Evolution de Montpellier, ISEM, Univ Montpellier, CNRS, IRD, EPHE, Université Montpellier, UMR5554 Montpellier, France
| | - Stéphanie Ventéo
- Institute for Neurosciences of Montpellier, Institut National de la Santé et de la Recherche Médicale, U1051 Montpellier, France
| | - Jean-Yves Sire
- Institut de Biologie Paris-Seine, Université Pierre et Marie Curie, UMR7138 Evolution Paris-Seine, Paris, France
| | - Sylvain Marcellini
- Laboratory of Development and Evolution, Department of Cell Biology, Faculty of Biological Sciences, University of Concepción, Concepción, Chile
| | - Mélanie Debiais-Thibaud
- Institut des Sciences de l’Evolution de Montpellier, ISEM, Univ Montpellier, CNRS, IRD, EPHE, Université Montpellier, UMR5554 Montpellier, France
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Deang JF, Persons AK, Oppedal AL, Rhee H, Moser RD, Horstemeyer MF. Structure, property, and function of sheepshead (Archosargus probatocephalus) teeth. Arch Oral Biol 2018; 89:1-8. [PMID: 29407634 DOI: 10.1016/j.archoralbio.2018.01.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [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: 08/03/2017] [Revised: 12/14/2017] [Accepted: 01/17/2018] [Indexed: 11/30/2022]
Abstract
OBJECTIVES This paper studies A. probatocephalus teeth and investigates the mechanical properties and chemical composition of the enameloid and dentin. DESIGN Nanoindentation tests with a max load of 1000 μN and X-ray Energy Dispersive Spectroscopy (EDS) were performed along the diameter of the polished sample. Microstructural analysis of the dentin tubules was performed from SEM images. RESULTS From nanoindentation testing, the dentin of the sheepshead teeth has a nanoindentation hardness of 0.89 ± 0.21 (mean ± S.D.) GPa and a reduced Young's modulus of 23.29 ± 5.30 GPa. The enameloid of A. probatocephalus has a hardness of 4.36 ± 0.44 GPa and a mean reduced Young's modulus of 98.14 ± 6.91 GPa. Additionally, nanoindentation tests showed that the enameloid's hardness and modulus increased closer to the surface of the tooth. X-ray Energy Dispersive Spectroscopy (EDS) data further suggests that the gradient may be a result of the wt% fluoride within the enameloid, where an increase in fluoride results in an increase in reduced Young's modulus and hardness. CONCLUSION The microstructural characterization of the number density and area of the dentin tubules were used to address the porosity effect in the dentin to achieve the experimentally validated microhardness. The mechanical properties of the sheepshead teeth were also compared with previous nanoindentation tests from other aquatic species. The sheepshead teeth exhibit a greater reduced Young's modulus and hardness compared to shark and piranha teeth.
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Affiliation(s)
- J F Deang
- Department of Mechanical Engineering, Mississippi State University, Mississippi State, MS 39762, USA; Center for Advanced Vehicular Systems, Mississippi State University, Mississippi State, MS 39762, USA.
| | - A K Persons
- Department of Mechanical Engineering, Mississippi State University, Mississippi State, MS 39762, USA; Center for Advanced Vehicular Systems, Mississippi State University, Mississippi State, MS 39762, USA
| | - A L Oppedal
- Center for Advanced Vehicular Systems, Mississippi State University, Mississippi State, MS 39762, USA
| | - H Rhee
- Department of Mechanical Engineering, Mississippi State University, Mississippi State, MS 39762, USA; Center for Advanced Vehicular Systems, Mississippi State University, Mississippi State, MS 39762, USA
| | - R D Moser
- US Army Engineer Research and Development Center, Geotechnical and Structures Laboratory, 3909 Halls Ferry Rd., Vicksburg, MS 39180, USA
| | - M F Horstemeyer
- Department of Mechanical Engineering, Mississippi State University, Mississippi State, MS 39762, USA; Center for Advanced Vehicular Systems, Mississippi State University, Mississippi State, MS 39762, USA
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Moyer JK, Bemis WE. Shark teeth as edged weapons: serrated teeth of three species of selachians. ZOOLOGY 2016; 120:101-109. [PMID: 27353190 DOI: 10.1016/j.zool.2016.05.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [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: 03/22/2016] [Revised: 05/11/2016] [Accepted: 05/24/2016] [Indexed: 10/21/2022]
Abstract
Prior to European contact, South Pacific islanders used serrated shark teeth as components of tools and weapons. They did this because serrated shark teeth are remarkably effective at slicing through soft tissues. To understand more about the forms and functions of serrated shark teeth, we examined the morphology and histology of tooth serrations in three species: the Tiger Shark (Galeocerdo cuvier), Blue Shark (Prionace glauca), and White Shark (Carcharodon carcharias). We show that there are two basic types of serrations. A primary serration consists of three layers of enameloid with underlying dentine filling the serration's base. All three species studied have primary serrations, although the dentine component differs (orthodentine in Tiger and Blue Sharks; osteodentine in the White Shark). Smaller secondary serrations are found in the Tiger Shark, formed solely by enameloid with no contribution from underlying dentine. Secondary serrations are effectively "serrations within serrations" that allow teeth to cut at different scales. We propose that the cutting edges of Tiger Shark teeth, equipped with serrations at different scales, are linked to a diet that includes large, hard-shelled prey (e.g., sea turtles) as well as smaller, softer prey such as fishes. We discuss other aspects of serration form and function by making analogies to man-made cutting implements, such as knives and saws.
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Affiliation(s)
- Joshua K Moyer
- Department of Ecology and Evolutionary Biology, Corson Hall, Cornell University, Tower Road, Ithaca, NY 14853, USA.
| | - William E Bemis
- Department of Ecology and Evolutionary Biology, Corson Hall, Cornell University, Tower Road, Ithaca, NY 14853, USA
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