1
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Woodruff ED, Gutierrez GC, Van Otterloo E, Williams T, Cohn MJ. Anomalous incisor morphology indicates tissue-specific roles for Tfap2a and Tfap2b in tooth development. Dev Biol 2021; 472:67-74. [PMID: 33460639 PMCID: PMC8018193 DOI: 10.1016/j.ydbio.2020.12.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 12/17/2020] [Accepted: 12/21/2020] [Indexed: 01/13/2023]
Abstract
Mice possess two types of teeth that differ in their cusp patterns; incisors have one cusp and molars have multiple cusps. The patterning of these two types of teeth relies on fine-tuning of the reciprocal molecular signaling between dental epithelial and mesenchymal tissues during embryonic development. The AP-2 transcription factors, particularly Tfap2a and Tfap2b, are essential components of such epithelial-mesenchymal signaling interactions that coordinate craniofacial development in mice and other vertebrates, but little is known about their roles in the regulation of tooth development and shape. Here we demonstrate that incisors and molars differ in their temporal and spatial expression of Tfap2a and Tfap2b. At the bud stage, Tfap2a is expressed in both the epithelium and mesenchyme of the incisors and molars, but Tfap2b expression is restricted to the molar mesenchyme, only later appearing in the incisor epithelium. Tissue-specific deletions show that loss of the epithelial domain of Tfap2a and Tfap2b affects the number and spatial arrangement of the incisors, notably resulting in duplicated lower incisors. In contrast, deletion of these two genes in the mesenchymal domain has little effect on tooth development. Collectively these results implicate epithelial expression of Tfap2a and Tfap2b in regulating the extent of the dental lamina associated with patterning the incisors and suggest that these genes contribute to morphological differences between anterior (incisor) and posterior (molar) teeth within the mammalian dentition.
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Affiliation(s)
- Emily D Woodruff
- Department of Biology, University of Florida, Gainesville, FL, USA.
| | | | - Eric Van Otterloo
- Department of Craniofacial Biology, University of Colorado Anschutz Medical Campus, Denver, CO, USA
| | - Trevor Williams
- Department of Craniofacial Biology, University of Colorado Anschutz Medical Campus, Denver, CO, USA
| | - Martin J Cohn
- Department of Biology, University of Florida, Gainesville, FL, USA; Department of Molecular Genetics and Microbiology, University of Florida, Gainesville, FL, USA.
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3
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Wang Y, Pang X, Wu J, Jin L, Yu Y, Gobin R, Yu J. MicroRNA hsa-let-7b suppresses the odonto/osteogenic differentiation capacity of stem cells from apical papilla by targeting MMP1. J Cell Biochem 2018; 119:6545-6554. [PMID: 29384216 DOI: 10.1002/jcb.26737] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Accepted: 01/25/2018] [Indexed: 12/21/2022]
Abstract
MicroRNA let-7 family acts as the key regulator of the differentiation of mesenchymal stem cells (MSCs). However, the influence of let-7b on biological characteristics of stem cells from apical papilla (SCAPs) is still controversial. In this study, the expression of hsa-let-7b was obviously downregulated during the osteogenic differentiation of SCAPs. SCAPs were then infected with hsa-let-7b or hsa-let-7b inhibitor lentiviruses. The proliferation ability was determined by CCK-8 and flow cytometry. The odonto/osteogenic differentiation capacity was analyzed by alkaline phosphatase (ALP) activity, alizarin red staining, Western blot assay, and real-time RT-PCR. Bioinformatics analysis was used to screen out the target of hsa-let-7b and the target relationship was confirmed by dual luciferase reporter assay. Hsa-let-7b was of no influence on the proliferation of SCAPs. Interferential expression of hsa-let-7b increased the ALP activity as well as the formation of calcified nodules of SCAPs. Moreover, the mRNA levels of osteoblastic markers (ALP, RUNX2, OSX, OPN, and OCN) were upregulated while the protein levels of DSPP, ALP, RUNX2, OSX, OPN, and OCN also increased considerably. Conversely, overexpression of hsa-let-7b inhibited the odonto/osteogenic differentiation capacity of SCAPs. Bioinformatics analysis revealed a putative binding site of hsa-let-7b in the matrix metalloproteinase 1 (MMP1) 3'-untranslated region (3'-UTR). Dual luciferase reporter assay confirmed that hsa-let-7b targets MMP1. The odonto/osteogenic differentiation ability of SCAPs ascended after repression of hsa-let-7b, which was then reversed after co-transfection with siMMP1. Together, hsa-let-7b can suppress the odonto/osteogenic differentiation capacity of SCAPs by targeting MMP1.
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Affiliation(s)
- Yanqiu Wang
- Key Laboratory of Oral Diseases of Jiangsu Province and Stomatological Institute of Nanjing Medical University, Nanjing, Jiangsu, China.,Department of Endodontic, School of Stomatology, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Xiyao Pang
- Key Laboratory of Oral Diseases of Jiangsu Province and Stomatological Institute of Nanjing Medical University, Nanjing, Jiangsu, China.,Department of Endodontic, School of Stomatology, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Jintao Wu
- Key Laboratory of Oral Diseases of Jiangsu Province and Stomatological Institute of Nanjing Medical University, Nanjing, Jiangsu, China.,Department of Endodontic, School of Stomatology, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Lin Jin
- Key Laboratory of Oral Diseases of Jiangsu Province and Stomatological Institute of Nanjing Medical University, Nanjing, Jiangsu, China.,Nantong Stomatological Hospital, Nantong, Jiangsu, China
| | - Yan Yu
- Key Laboratory of Oral Diseases of Jiangsu Province and Stomatological Institute of Nanjing Medical University, Nanjing, Jiangsu, China.,Department of Endodontic, School of Stomatology, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Romila Gobin
- Key Laboratory of Oral Diseases of Jiangsu Province and Stomatological Institute of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Jinhua Yu
- Key Laboratory of Oral Diseases of Jiangsu Province and Stomatological Institute of Nanjing Medical University, Nanjing, Jiangsu, China.,Department of Endodontic, School of Stomatology, Nanjing Medical University, Nanjing, Jiangsu, China
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4
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Jonsson L, Magnusson TE, Thordarson A, Jonsson T, Geller F, Feenstra B, Melbye M, Nohr EA, Vucic S, Dhamo B, Rivadeneira F, Ongkosuwito EM, Wolvius EB, Leslie EJ, Marazita ML, Howe BJ, Moreno Uribe LM, Alonso I, Santos M, Pinho T, Jonsson R, Audolfsson G, Gudmundsson L, Nawaz MS, Olafsson S, Gustafsson O, Ingason A, Unnsteinsdottir U, Bjornsdottir G, Walters GB, Zervas M, Oddsson A, Gudbjartsson DF, Steinberg S, Stefansson H, Stefansson K. Rare and Common Variants Conferring Risk of Tooth Agenesis. J Dent Res 2018; 97:515-522. [PMID: 29364747 DOI: 10.1177/0022034517750109] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
We present association results from a large genome-wide association study of tooth agenesis (TA) as well as selective TA, including 1,944 subjects with congenitally missing teeth, excluding third molars, and 338,554 controls, all of European ancestry. We also tested the association of previously identified risk variants, for timing of tooth eruption and orofacial clefts, with TA. We report associations between TA and 9 novel risk variants. Five of these variants associate with selective TA, including a variant conferring risk of orofacial clefts. These results contribute to a deeper understanding of the genetic architecture of tooth development and disease. The few variants previously associated with TA were uncovered through candidate gene studies guided by mouse knockouts. Knowing the etiology and clinical features of TA is important for planning oral rehabilitation that often involves an interdisciplinary approach.
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Affiliation(s)
- L Jonsson
- 1 deCODE genetics/Amgen, Reykjavik, Iceland.,2 Department of Pharmacology, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - T E Magnusson
- 3 Faculty of Odontology, University of Iceland, Reykjavík, Iceland
| | - A Thordarson
- 3 Faculty of Odontology, University of Iceland, Reykjavík, Iceland
| | - T Jonsson
- 3 Faculty of Odontology, University of Iceland, Reykjavík, Iceland
| | - F Geller
- 4 Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark
| | - B Feenstra
- 4 Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark
| | - M Melbye
- 4 Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark.,5 Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark.,6 Department of Medicine, School of Medicine, Stanford University, Stanford, California, USA
| | - E A Nohr
- 7 Research Unit for Gynaecology and Obstetrics, Department of Clinical Research, University of Southern Denmark, Odense, Denmark
| | - S Vucic
- 8 Department of Oral and Maxillofacial Surgery, Special Dental Care and Orthodontics, Erasmus University Medical Centre, Rotterdam, The Netherlands.,9 Generation R Study Group, Erasmus University Medical Centre, Rotterdam, The Netherlands
| | - B Dhamo
- 8 Department of Oral and Maxillofacial Surgery, Special Dental Care and Orthodontics, Erasmus University Medical Centre, Rotterdam, The Netherlands.,9 Generation R Study Group, Erasmus University Medical Centre, Rotterdam, The Netherlands
| | - F Rivadeneira
- 9 Generation R Study Group, Erasmus University Medical Centre, Rotterdam, The Netherlands.,10 Department of Epidemiology, Erasmus University Medical Center, Rotterdam, The Netherlands.,11 Department of Internal Medicine, Erasmus University Medical Centre, Rotterdam, The Netherlands
| | - E M Ongkosuwito
- 8 Department of Oral and Maxillofacial Surgery, Special Dental Care and Orthodontics, Erasmus University Medical Centre, Rotterdam, The Netherlands.,9 Generation R Study Group, Erasmus University Medical Centre, Rotterdam, The Netherlands
| | - E B Wolvius
- 8 Department of Oral and Maxillofacial Surgery, Special Dental Care and Orthodontics, Erasmus University Medical Centre, Rotterdam, The Netherlands.,9 Generation R Study Group, Erasmus University Medical Centre, Rotterdam, The Netherlands
| | - E J Leslie
- 12 Department of Oral Biology, Center for Craniofacial and Dental Genetics, School of Dental Medicine, University of Pittsburgh, Pittsburgh, PA, USA.,13 Department of Human Genetics, Emory University School of Medicine, Atlanta, GA, USA
| | - M L Marazita
- 12 Department of Oral Biology, Center for Craniofacial and Dental Genetics, School of Dental Medicine, University of Pittsburgh, Pittsburgh, PA, USA.,14 Department of Human Genetics, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA, USA.,15 Clinical and Translational Science, School of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - B J Howe
- 16 Department of Family Dentistry, College of Dentistry, University of Iowa, Iowa City, IA, USA
| | - L M Moreno Uribe
- 16 Department of Family Dentistry, College of Dentistry, University of Iowa, Iowa City, IA, USA
| | - I Alonso
- 17 i3S, Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,18 UnIGENe, Instituto Biologia Molecular Celular, Universidade do Porto, Porto, Portugal
| | - M Santos
- 17 i3S, Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,18 UnIGENe, Instituto Biologia Molecular Celular, Universidade do Porto, Porto, Portugal
| | - T Pinho
- 17 i3S, Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,18 UnIGENe, Instituto Biologia Molecular Celular, Universidade do Porto, Porto, Portugal.,19 CESPU, Instituto de Investigacão e Formação Avançada em Ciências e Tecnologias da Saúde, Rua Central de Gandra, Gandra-PRD, Portugal
| | - R Jonsson
- 20 Icelandic Health Insurance, Reykjavík, Iceland
| | - G Audolfsson
- 21 Department of Plastic Surgery, Landspitali-University Hospital, Reykjavik, Iceland
| | | | - M S Nawaz
- 1 deCODE genetics/Amgen, Reykjavik, Iceland.,22 Faculty of Medicine, University of Iceland, Reykjavik, Iceland
| | - S Olafsson
- 1 deCODE genetics/Amgen, Reykjavik, Iceland
| | | | - A Ingason
- 1 deCODE genetics/Amgen, Reykjavik, Iceland
| | | | | | - G B Walters
- 1 deCODE genetics/Amgen, Reykjavik, Iceland.,22 Faculty of Medicine, University of Iceland, Reykjavik, Iceland
| | - M Zervas
- 1 deCODE genetics/Amgen, Reykjavik, Iceland
| | - A Oddsson
- 1 deCODE genetics/Amgen, Reykjavik, Iceland
| | | | | | | | - K Stefansson
- 1 deCODE genetics/Amgen, Reykjavik, Iceland.,22 Faculty of Medicine, University of Iceland, Reykjavik, Iceland
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5
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Naveau A, Zhang B, Meng B, Sutherland MT, Prochazkova M, Wen T, Marangoni P, Jones KB, Cox TC, Ganss B, Jheon AH, Klein OD. Isl1 Controls Patterning and Mineralization of Enamel in the Continuously Renewing Mouse Incisor. J Bone Miner Res 2017; 32:2219-2231. [PMID: 28650075 PMCID: PMC5685895 DOI: 10.1002/jbmr.3202] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Revised: 06/09/2017] [Accepted: 06/21/2017] [Indexed: 01/15/2023]
Abstract
Rodents are characterized by continuously renewing incisors whose growth is fueled by epithelial and mesenchymal stem cells housed in the proximal compartments of the tooth. The epithelial stem cells reside in structures known as the labial (toward the lip) and lingual (toward the tongue) cervical loops (laCL and liCL, respectively). An important feature of the rodent incisor is that enamel, the outer, highly mineralized layer, is asymmetrically distributed, because it is normally generated by the laCL but not the liCL. Here, we show that epithelial-specific deletion of the transcription factor Islet1 (Isl1) is sufficient to drive formation of ectopic enamel by the liCL stem cells, and also that it leads to production of altered enamel on the labial surface. Molecular analyses of developing and adult incisors revealed that epithelial deletion of Isl1 affected multiple, major pathways: Bmp (bone morphogenetic protein), Hh (hedgehog), Fgf (fibroblast growth factor), and Notch signaling were upregulated and associated with liCL-generated ectopic enamel; on the labial side, upregulation of Bmp and Fgf signaling, and downregulation of Shh were associated with premature enamel formation. Transcriptome profiling studies identified a suite of differentially regulated genes in developing Isl1 mutant incisors. Our studies demonstrate that ISL1 plays a central role in proper patterning of stem cell-derived enamel in the incisor and indicate that this factor is an important upstream regulator of signaling pathways during tooth development and renewal. © 2017 American Society for Bone and Mineral Research.
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Affiliation(s)
- Adrien Naveau
- Program in Craniofacial Biology and Department of Orofacial Sciences, University of California, San Francisco, San Francisco, CA, USA
- Université Paris Descartes, Sorbonne Paris Cite, UMR S872, France
- Centre de Recherche des Cordeliers, Université Pierre et Marie Curie, UMR S872, Paris, France
- INSERM U872, Paris, France
| | - Bin Zhang
- Program in Craniofacial Biology and Department of Orofacial Sciences, University of California, San Francisco, San Francisco, CA, USA
| | - Bo Meng
- Program in Craniofacial Biology and Department of Orofacial Sciences, University of California, San Francisco, San Francisco, CA, USA
| | - McGarrett T. Sutherland
- Program in Craniofacial Biology and Department of Orofacial Sciences, University of California, San Francisco, San Francisco, CA, USA
| | - Michaela Prochazkova
- Program in Craniofacial Biology and Department of Orofacial Sciences, University of California, San Francisco, San Francisco, CA, USA
- Laboratory of Transgenic Models of Diseases, Institute of Molecular Genetics of the ASCR, v.v.i., Prague 4 14220, Czech Republic
| | - Timothy Wen
- Program in Craniofacial Biology and Department of Orofacial Sciences, University of California, San Francisco, San Francisco, CA, USA
| | - Pauline Marangoni
- Program in Craniofacial Biology and Department of Orofacial Sciences, University of California, San Francisco, San Francisco, CA, USA
| | - Kyle B. Jones
- Program in Craniofacial Biology and Department of Orofacial Sciences, University of California, San Francisco, San Francisco, CA, USA
| | - Timothy C. Cox
- Department of Pediatrics (Craniofacial Medicine), University of Washington & Center for Developmental Biology and Regenerative Medicine, Seattle Children's Research Institute, Seattle, WA, USA
| | - Bernhard Ganss
- Faculty of Dentistry, University of Toronto, Toronto, ON Canada
| | - Andrew H. Jheon
- Program in Craniofacial Biology and Department of Orofacial Sciences, University of California, San Francisco, San Francisco, CA, USA
| | - Ophir D. Klein
- Program in Craniofacial Biology and Department of Orofacial Sciences, University of California, San Francisco, San Francisco, CA, USA
- Department of Pediatrics and Institute for Human Genetics, University of California, San Francisco, San Francisco, CA, USA
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