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Gene Expression and Immunochemistry Analysis of ADAMTS-1 and Versican in Ameloblastoma. Int J Dent 2022; 2022:5235376. [PMID: 36338393 PMCID: PMC9629950 DOI: 10.1155/2022/5235376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Revised: 09/23/2022] [Accepted: 10/11/2022] [Indexed: 11/23/2022] Open
Abstract
Background Ameloblastoma is a benign but locally invasive odontogenic epithelial tumor, associated with a high recurrence rate after treatment. The action of enzymes of the metalloproteinase family is important to the degraded extracellular matrix, contributing to invasion. Thus, this study aimed to investigate the gene and protein expression of ADAMTS-1 and versican in ameloblastoma. Materials and Methods Twenty cases of ameloblastoma (n = 20) and ten dental follicles (DF) (n = 10) were used as a source for immunochemistry and quantitative RT-PCR for determining the protein and mRNA expressions of the concerned genes, respectively. Moreover, western blot and indirect immunofluorescence analysis were performed in AME cells. Results ADAMTS-1 and versican were overexpressed in DF than ameloblastoma by RT-PCR. However, in the immunolocalization analysis, ADAMTS-1 was expressed in ameloblastoma more than in DF and versican immunostaining obtained a similar pattern between ameloblastoma and DF. Indirect immunofluorescence detected the ADAMTS-1 and versican expression in cell lines derived from ameloblastoma. Western blot from cell lysate and conditioned medium detected ADAMTS-1 bands representing full-length and different processed forms. Monensin treatment confined ADAMTS-1 in the cell cytoplasm. Versican fragments also were detected in different compartments, intracellular and conditioned medium, allowing the versican process by ADAMTS-1. Conclusion This study showed a distinct expression of ADAMTS-1 and versican in ameloblastoma and DF, with ADAMTS-1 protein higher expression observed in ameloblastoma and possibly cleaved versican. These findings suggested that ADAMTS-1 may participate in tumor invasion, especially for the degradation of substrates (versican) in the ECM.
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2
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Higuchi T, Suzuki D, Watanabe T, Fanhchaksai K, Ota K, Yokoo K, Furukawa H, Watanabe H. Versican contributes to ligament formation of knee joints. PLoS One 2021; 16:e0250366. [PMID: 33886644 PMCID: PMC8061984 DOI: 10.1371/journal.pone.0250366] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Accepted: 04/06/2021] [Indexed: 11/30/2022] Open
Abstract
Versican is a large proteoglycan in the extracellular matrix. During embryonic stages, it plays a crucial role in the development of cartilage, heart, and dermis. Previously, we reported that Prx1-Vcan conditional knockout mice, lacking Vcan expression in mesenchymal condensation areas of the limb bud, show the impaired joint formation and delayed cartilage development. Here, we investigated their phenotype in adults and found that they develop swelling of the knee joint. Histologically, their newborn joint exhibited impaired formation of both anterior and posterior cruciate ligaments. Immunostaining revealed a decrease in scleraxis-positive cells in both articular cartilage and ligament of Prx1-Vcan knee joint, spotty patterns of type I collagen, and the presence of type II collagen concomitant with the absence of versican expression. These results suggest that versican expression during the perinatal period is required for cruciate ligaments’ formation and that its depletion affects joint function in later ages.
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Affiliation(s)
- Tomoko Higuchi
- Department of Plastic Surgery, Aichi Medical University, Nagakute, Japan
| | - Daisuke Suzuki
- Department of Health Sciences, Hokkaido Chitose College of Rehabilitation, Chitose, Japan
| | - Takafumi Watanabe
- Laboratory of Veterinary Anatomy, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Japan
| | - Kanda Fanhchaksai
- Institute for Molecular Science of Medicine, Aichi Medical University, Nagakute, Japan
| | - Keiko Ota
- Institute for Molecular Science of Medicine, Aichi Medical University, Nagakute, Japan
| | - Kazuhisa Yokoo
- Department of Plastic Surgery, Aichi Medical University, Nagakute, Japan
| | - Hiroshi Furukawa
- Department of Plastic Surgery, Aichi Medical University, Nagakute, Japan
| | - Hideto Watanabe
- Institute for Molecular Science of Medicine, Aichi Medical University, Nagakute, Japan
- * E-mail:
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3
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Batista NMG, de Moraes ATL, Balbinot KM, de Souza Neto OR, da Silva Brandão JM, da Silva Kataoka MS, de Melo Alves Júnior S, de Jesus Viana Pinheiro J. Immunohistochemical analysis of ADAMTS-1, versican and pEGFR expressions in periapical granuloma and radicular cyst. BMC Oral Health 2021; 21:102. [PMID: 33676487 PMCID: PMC7937253 DOI: 10.1186/s12903-021-01462-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Accepted: 02/25/2021] [Indexed: 11/21/2022] Open
Abstract
Background ADAMTS expression can be associated with several inflammatory processes, and has been correlated with tumorigenesis of some neoplasms, but its participation in the development of periapical lesions has not been investigated. Therefore, our objective was to verify the expression of ADAMTS-1, versican and pEGFR in Periapical Granuloma (PG) and in the Radicular Cyst (RC) since they are the most common lesions of the periapex.
Methods 25 samples of RC and 10 of PG were used. As a control, 10 samples of inflammatory fibrous hyperplasia (IFH) and 10 of dental follicle (DF) were used. The expression of these proteins was investigated using immunohistochemistry. Results In the epithelium of RC, IFH and DF, the expression of ADAMTS-1 was greater in DF than in RC (p < .001). Versicano showed greater expression in IFH than in RC, DF than in RC (p < .001). pEGFR showed greater expression in IFH and RC than in DF (p < .01 and p < .05, respectively). In connective tissue, ADAMTS-1 expression was greater in PG and RC than in IFH and DF (p < .001). Versicano showed greater expression in PG, RC and IFH compared to DF (p < .001). In pEGFR there was a higher expression in PG when compared to RC, IFH and DF (p < .001). Greater immunostaining occurred in the RC than in the DF (p < .001). Conclusions Our results suggest that the studied proteins may participate in the pathogenesis of PG and RC, through the interaction of these proteins, in the remodeling of the ECM (versican) by ADAMTS-1, producing bioactive fragments, which could activate EGFR, contributing to the formation, growth and maintenance of injuries.
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Affiliation(s)
| | - Antonia Taiane Lopes de Moraes
- Department of Oral Pathology, School of Dentistry, Federal University of Pará, Avenue Augusto Corrêa, 01, Belém, PA, 66075-110, Brazil
| | - Karolyny Martins Balbinot
- Department of Oral Pathology, School of Dentistry, Federal University of Pará, Avenue Augusto Corrêa, 01, Belém, PA, 66075-110, Brazil
| | | | - Juliana Melo da Silva Brandão
- Department of Oral Pathology, School of Dentistry, Federal University of Pará, Avenue Augusto Corrêa, 01, Belém, PA, 66075-110, Brazil
| | - Maria Sueli da Silva Kataoka
- Department of Oral Pathology, School of Dentistry, Federal University of Pará, Avenue Augusto Corrêa, 01, Belém, PA, 66075-110, Brazil
| | - Sérgio de Melo Alves Júnior
- Department of Oral Pathology, School of Dentistry, Federal University of Pará, Avenue Augusto Corrêa, 01, Belém, PA, 66075-110, Brazil
| | - João de Jesus Viana Pinheiro
- Federal University of Pará Brazil, Avenue Augusto Corrêa, 01, Belém, PA, 66075-110, Brazil. .,Department of Oral Pathology, School of Dentistry, Federal University of Pará, Avenue Augusto Corrêa, 01, Belém, PA, 66075-110, Brazil. .,Cell Culture Laboratory, Faculty of Dentistry, Federal University of Pará, Rua Augusto Corrêa, 01, Guamá, Belém, PA, 66075110, Brazil.
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4
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Listik E, Azevedo Marques Gaschler J, Matias M, Neuppmann Feres MF, Toma L, Raphaelli Nahás-Scocate AC. Proteoglycans and dental biology: the first review. Carbohydr Polym 2019; 225:115199. [DOI: 10.1016/j.carbpol.2019.115199] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2019] [Revised: 08/11/2019] [Accepted: 08/12/2019] [Indexed: 01/08/2023]
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5
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Degradation of extracellular matrices propagates calcification during development and healing in bones and teeth. J Oral Biosci 2019; 61:149-156. [PMID: 31400543 DOI: 10.1016/j.job.2019.07.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Revised: 07/09/2019] [Accepted: 07/11/2019] [Indexed: 11/22/2022]
Abstract
BACKGROUND Bone, dentin, and enamel are tissues formed through calcification, a process involving deposition of calcium phosphate minerals on extracellular organic matrices. Calcification, the underlying mechanism of which is unknown, is initiated with mineral deposition followed by advancing of the deposit and subsequent maturation of the mineral crystal. HIGHLIGHT We have reviewed the current knowledge of how calcification proceeds during bone development, bone healing, and enamel and dentin development, based on reported studies. Previous studies reported by us and by other authors have suggested that degradation of some extracellular matrix (ECM) proteins is involved in calcification during bone and dentin development and bone healing in a manner similar to that previously reported for enamel development. CONCLUSION The ECM proteins may inhibit mineral deposition and calcification, similar to the role of amelogenin during enamel development. The candidates for the amelogenin equivalents in bone and dentin have not been identified. Further studies are required to elucidate the regulatory mechanisms of bone and dentin calcification in light of specific ECM proteins that prevent calcification and enzymes that degrade these ECM proteins.
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6
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Bigoni S, Neri M, Scotton C, Farina R, Sabatelli P, Jiang C, Zhang J, Falzarano MS, Rossi R, Ognibene D, Selvatici R, Gualandi F, Bosshardt D, Perri P, Campa C, Brancati F, Salvatore M, De Stefano MC, Taruscio D, Trombelli L, Fang M, Ferlini A. Homozygous Recessive Versican Missense Variation Is Associated With Early Teeth Loss in a Pakistani Family. Front Genet 2019; 9:723. [PMID: 30740127 PMCID: PMC6357929 DOI: 10.3389/fgene.2018.00723] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Accepted: 12/22/2018] [Indexed: 11/13/2022] Open
Abstract
Only a few genes involved in teeth development and morphology are known to be responsible for tooth abnormalities in Mendelian-inherited diseases. We studied an inbred family of Pakistani origin in which two first-cousin born brothers are affected by early tooth loss with peculiar teeth abnormalities characterized by the absence of cementum formation. Whole exome sequencing revealed a H2665L homozygous sequence variant in the VCAN gene. Dominant splicing mutations in VCAN are known to cause Wagner syndrome or vitreoretinopathy. We explored teeth morphology in these two patients, while versican expression was assessed by western blot analysis. Early signs of vitreoretinopathy were found in the elder brother while the parents were completely negative. Our findings suggest that the homozygous recessive H2665L missense sequence variant impairs the normal morphology of the teeth roots via loss of cementum synthesis, and is also associated with early onset, recessive, Wagner syndrome, thus expanding both the phenotype mutation scenario and the inheritance mode of VCAN mutations.
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Affiliation(s)
- Stefania Bigoni
- Medical Genetics Unit, Department of Medical Sciences, University of Ferrara, Ferrara, Italy
| | - Marcella Neri
- Medical Genetics Unit, Department of Medical Sciences, University of Ferrara, Ferrara, Italy
| | - Chiara Scotton
- Medical Genetics Unit, Department of Medical Sciences, University of Ferrara, Ferrara, Italy
| | - Roberto Farina
- Research Centre for the Study of Periodontal and Peri-Implant Diseases, University of Ferrara, Ferrara, Italy
| | - Patrizia Sabatelli
- Institute of Molecular Genetics, National Research Council of Italy, Bologna, Italy
| | | | | | - Maria Sofia Falzarano
- Medical Genetics Unit, Department of Medical Sciences, University of Ferrara, Ferrara, Italy
| | - Rachele Rossi
- Medical Genetics Unit, Department of Medical Sciences, University of Ferrara, Ferrara, Italy
| | - Davide Ognibene
- Medical Genetics Unit, Department of Medical Sciences, University of Ferrara, Ferrara, Italy
| | - Rita Selvatici
- Medical Genetics Unit, Department of Medical Sciences, University of Ferrara, Ferrara, Italy
| | - Francesca Gualandi
- Medical Genetics Unit, Department of Medical Sciences, University of Ferrara, Ferrara, Italy
| | - Dieter Bosshardt
- Department of Periodontology and Department of Oral Surgery and Stomatology, School of Dental Medicine, University of Bern, Bern, Switzerland
| | - Paolo Perri
- Eye Clinic, Sant'Anna University Hospital, Ferrara, Italy
| | - Claudio Campa
- Eye Clinic, Sant'Anna University Hospital, Ferrara, Italy
| | - Francesco Brancati
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila Italy.,Laboratory of Molecular and Cell Biology, Istituto Dermopatico dell'Immacolata, IDI-IRCCS, Rome, Italy
| | | | | | | | - Leonardo Trombelli
- Research Centre for the Study of Periodontal and Peri-Implant Diseases, University of Ferrara, Ferrara, Italy
| | - Mingyan Fang
- BGI-Shenzhen, Shenzhen, China.,Division of Clinical Immunology, Department of Laboratory Medicine, Karolinska Institute at Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - Alessandra Ferlini
- Medical Genetics Unit, Department of Medical Sciences, University of Ferrara, Ferrara, Italy.,Dubowitz Neuromuscular Unit, University College London, London, United Kingdom
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7
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Fleissig O, Reichenberg E, Tal M, Redlich M, Barkana I, Palmon A. Morphologic and gene expression analysis of periodontal ligament fibroblasts subjected to pressure. Am J Orthod Dentofacial Orthop 2018; 154:664-676. [PMID: 30384937 DOI: 10.1016/j.ajodo.2018.01.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2017] [Revised: 01/01/2018] [Accepted: 01/01/2018] [Indexed: 11/24/2022]
Abstract
INTRODUCTION Force application (FA) during orthodontic tooth movement is mediated through periodontal ligament (PDL) fibroblasts. FA on deciduous teeth has an inherent risk of root resorption, which is less in permanent teeth. Currently, the root resorption mechanism is poorly understood. We hypothesized that FA alters the morphology and gene expression of PDL fibroblasts. This study was designed to achieve homogenous PDL fibroblast cultures, establish an in-vitro FA model, analyze fibroblast morphology after FA, and compare the gene expressions of PDL fibroblasts of deciduous and permanent teeth after FA. METHODS Fibroblasts were sorted from primary cultures of deciduous and permanent tooth PDLs. Cell viability was evaluated in the Opticell (Thermo Scientific, Waltham, Mass) FA model. Cellular morphology was analyzed using immunofluorescence staining for actin and focal adhesion complexes. Gene expressions of untreated or pressure-treated PDL fibroblasts of deciduous and permanent teeth were compared by gene array and confirmed by real-time polymerase chain reaction. RESULTS Cell sorting resulted in cultures containing 98% of PDL fibroblasts. The Opticell model showed 94% cell survival after FA. FA increased fibroblasts' adhesion. Gene arrays and real-time polymerase chain reactions indicated greater up-regulation of DKK2 mRNA in untreated PDL fibroblasts of deciduous teeth and greater up-regulation of ADAMTS1 mRNA in pressurized PDL fibroblasts of deciduous and permanent teeth. CONCLUSIONS Cell sorting is an efficient method to establish homogenous PDL fibroblast cultures. Using the Opticell FA model allows the maintenance of excellent cell viability. FA increased the surface adherence of fibroblasts. Up-regulation of ADAMTS1 after FA may indicate its involvement in the remodeling of the periodontium during orthodontic tooth movement. Understanding root resorption mechanisms under FA will help to prevent it during orthodontic treatment.
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Affiliation(s)
- Omer Fleissig
- Department of Orthodontics, Faculty of Dental Medicine, Hebrew University and Hadassah Medical Center, Jerusalem, Israel
| | - Elisha Reichenberg
- Department of Orthodontics, Faculty of Dental Medicine, Hebrew University and Hadassah Medical Center, Jerusalem, Israel
| | - Maoz Tal
- Institute of Dental Sciences, Faculty of Dental Medicine, Hebrew University and Hadassah Medical Center, Jerusalem, Israel
| | | | - Idit Barkana
- Department of Orthodontics, Dental Medicine Institute, Tel Hashomer Hospital, Ramat Gan, Israel
| | - Aaron Palmon
- Institute of Dental Sciences, Faculty of Dental Medicine, Hebrew University and Hadassah Medical Center, Jerusalem, Israel.
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8
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Gong AX, Zhang JH, Li J, Wu J, Wang L, Miao DS. Comparison of gene expression profiles between dental pulp and periodontal ligament tissues in humans. Int J Mol Med 2017; 40:647-660. [PMID: 28713908 PMCID: PMC5547970 DOI: 10.3892/ijmm.2017.3065] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Accepted: 06/16/2017] [Indexed: 01/09/2023] Open
Abstract
There are anatomical and functional differences between human dental pulp (DP) and periodontal ligament (PDL). However, the molecular biological differences and function of these tissues are poorly understood. In the present study, we employed a cDNA microarray array to screen for differentially expressed genes (DEGs) between human DP and PDL tissues, and used the online software WebGestalt to perform the functional analysis of the DEGs. In addition, the STRING database and KEGG pathway analysis were applied for interaction network and pathway analysis of the DEGs. DP and PDL samples were obtained from permanent premolars (n=16) extracted for orthodontic purposes. The results of the microarray assay were confirmed by RT-qPCR. The DEGs were found to be significantly associated with the extracellular matrix and focal adhesion. A total of 10 genes were selected to confirm the results. The mRNA levels of integrin alpha 4 (ITGA4), integrin alpha 8 (ITGA8), neurexin 1 (NRXN1) and contactin 1 (CNTN1) were significantly higher in the DP than in the PDL tissues. However, the levels of collagen type XI alpha 1 (COL11A1), aggrecan (ACAN), collagen type VI alpha 1 (COL6A1), chondroadherin (CHAD), laminin gamma 2 (LAMC2) and laminin alpha 3 (LAMA3) were higher in the PDL than in the DP samples. The gene expression profiles provide novel insight into the characterization of DP and PDL tissues, and contribute to our understanding of the potential molecular mechanisms of dental tissue mineralization and regeneration.
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Affiliation(s)
- Ai-Xiu Gong
- Department of Stomatology, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu 210008, P.R. China
| | - Jing-Han Zhang
- Department of Neonatology, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu 210008, P.R. China
| | - Jing Li
- Department of Stomatology, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu 210008, P.R. China
| | - Jun Wu
- State Key Laboratory of Reproductive Medicine, The Research Center for Bone and Stem Cells, Department of Anatomy, Histology and Embryology, Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Lin Wang
- Jiangsu Key Laboratory of Oral Diseases, Department of Orthodontics, School of Stomatology, Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Deng-Shun Miao
- State Key Laboratory of Reproductive Medicine, The Research Center for Bone and Stem Cells, Department of Anatomy, Histology and Embryology, Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
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9
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Torun D, Torun ZÖ, Demirkaya K, Sarper M, Elçi MP, Avcu F. Gene expression changes in bioceramic paste-treated human dental pulp cells. J Oral Sci 2017; 58:307-15. [PMID: 27665968 DOI: 10.2334/josnusd.15-0600] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
We evaluated the gene expression profiles of human dental pulp cells exposed to iRoot BP using microarray after 24 and 72 h. The results were verified using quantitative reverse transcriptase PCR analysis. Of the 36,000 transcripts arrayed, 21 were up-regulated and 15 were down-regulated by more than two fold. The largest group of up-regulated genes included those involved in nucleobase-containing compound metabolic processes, cell communication, protein metabolic processes, developmental processes, and biological regulation. The largest groups of down-regulated genes were those involved in cell communication, development, and biological regulation processes. In conclusion, iRoot BP affects the expression of genes involved in different biological processes in human dental pulp cells. (J Oral Sci 58, 307-315, 2016).
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Affiliation(s)
- Deniz Torun
- Department of Medical Genetics, Gulhane Military Medical Academy
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10
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Dentin sialophosphoprotein is a potentially latent bioactive protein in dentin. J Oral Biosci 2016; 58:134-142. [DOI: 10.1016/j.job.2016.08.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Accepted: 08/01/2016] [Indexed: 11/18/2022]
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11
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Guan X, Song Y, Ott J, Zhang Y, Li C, Xin T, Li Z, Gan Y, Li J, Zhou S, Zhou Y. The ADAMTS1 Gene Is Associated with Familial Mandibular Prognathism. J Dent Res 2015; 94:1196-201. [PMID: 26124221 DOI: 10.1177/0022034515589957] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Mandibular prognathism is a facial skeletal malocclusion. Until now, the genetic mechanism has been unclear. The goal of this study was to identify candidate genes or genomic regions directly associated with mandibular prognathism development, by employing whole genome sequencing. A large Chinese family was recruited, composed of 9 affected and 12 unaffected individuals, and the inheritance pattern of this family tends to be autosomal dominant. A single-nucleotide missense mutation in the ADAMTS1 gene (c. 742I>T) was found to segregate in the family, given that the affected individuals must be heterozygous for the mutation. For mutation validation, we screened this candidate mutation and 15 tag single-nucleotide polymorphisms in the coding sequence of ADAMTS1 among 230 unrelated cases and 196 unrelated controls using Sequenom Massarray and found that 3 in 230 cases carried this mutation and none of the controls did. Final results suggested that 2 single-nucleotide polymorphisms (rs2738, rs229038) of ADAMTS1 were significantly associated with mandibular prognathism.
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Affiliation(s)
- X Guan
- Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing, P.R. China
| | - Y Song
- Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing, P.R. China
| | - J Ott
- Department of Laboratory of Statistical Genetics, Institute of Psychology, Chinese Academy of Sciences, Beijing, P.R. China, and Rockefeller University, New York, NY, USA
| | - Y Zhang
- Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing, P.R. China
| | - C Li
- Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing, P.R. China
| | - T Xin
- Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing, P.R. China
| | - Z Li
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology. Beijing, P.R. China
| | - Y Gan
- Department of Laboratory of Molecular Biology and Center for TMD and Orofacial Pain, Peking University School and Hospital of Stomatology. Beijing, P.R. China
| | - J Li
- Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing, P.R. China
| | - S Zhou
- Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing, P.R. China
| | - Y Zhou
- Department of Orthodontics, Center for Craniofacial Stem Cell Research, Regeneration, and Translational Medicine, Peking University School and Hospital of Stomatology, Beijing, P.R. China
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12
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Wu H, Whitfield TW, Gordon JAR, Dobson JR, Tai PWL, van Wijnen AJ, Stein JL, Stein GS, Lian JB. Genomic occupancy of Runx2 with global expression profiling identifies a novel dimension to control of osteoblastogenesis. Genome Biol 2014; 15:R52. [PMID: 24655370 PMCID: PMC4056528 DOI: 10.1186/gb-2014-15-3-r52] [Citation(s) in RCA: 109] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2013] [Accepted: 03/21/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Osteogenesis is a highly regulated developmental process and continues during the turnover and repair of mature bone. Runx2, the master regulator of osteoblastogenesis, directs a transcriptional program essential for bone formation through genetic and epigenetic mechanisms. While individual Runx2 gene targets have been identified, further insights into the broad spectrum of Runx2 functions required for osteogenesis are needed. RESULTS By performing genome-wide characterization of Runx2 binding at the three major stages of osteoblast differentiation--proliferation, matrix deposition and mineralization--we identify Runx2-dependent regulatory networks driving bone formation. Using chromatin immunoprecipitation followed by high-throughput sequencing over the course of these stages, we identify approximately 80,000 significantly enriched regions of Runx2 binding throughout the mouse genome. These binding events exhibit distinct patterns during osteogenesis, and are associated with proximal promoters and also non-promoter regions: upstream, introns, exons, transcription termination site regions, and intergenic regions. These peaks were partitioned into clusters that are associated with genes in complex biological processes that support bone formation. Using Affymetrix expression profiling of differentiating osteoblasts depleted of Runx2, we identify novel Runx2 targets including Ezh2, a critical epigenetic regulator; Crabp2, a retinoic acid signaling component; Adamts4 and Tnfrsf19, two remodelers of the extracellular matrix. We demonstrate by luciferase assays that these novel biological targets are regulated by Runx2 occupancy at non-promoter regions. CONCLUSIONS Our data establish that Runx2 interactions with chromatin across the genome reveal novel genes, pathways and transcriptional mechanisms that contribute to the regulation of osteoblastogenesis.
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13
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Comparative gene expression analysis of the human periodontal ligament in deciduous and permanent teeth. PLoS One 2013; 8:e61231. [PMID: 23593441 PMCID: PMC3620385 DOI: 10.1371/journal.pone.0061231] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2012] [Accepted: 03/07/2013] [Indexed: 01/09/2023] Open
Abstract
There are histological and functional differences between human deciduous and permanent periodontal ligament (PDL) tissues. The aim of this study was to determine the differences between these two types of tissue at the molecular level by comparing their gene expression patterns. PDL samples were obtained from permanent premolars (n = 38) and anterior deciduous teeth (n = 31) extracted from 40 healthy persons. Comparative cDNA microarray analysis revealed several differences in gene expression between the deciduous and permanent PDL tissues. These findings were verified by qRT-PCR (quantitative reverse-transcription-polymerase chain reaction) analysis, and the areas where genes are expressed were revealed by immunohistochemical staining. The expressions of 21 genes were up-regulated in deciduous relative to PDL tissues, and those of 30 genes were up-regulated in permanent relative to deciduous PDL tissues. The genes that were up-regulated in deciduous PDL tissues were those involved in the formation of the extracellular matrix (LAMC2, LAMB3, and COMP), tissue development (IGF2BP, MAB21L2, and PAX3), and inflammatory or immune reactions leading to tissue degradation (IL1A, CCL21, and CCL18). The up-regulated genes in permanent PDL tissues were related to tissue degradation (IL6 and ADAMTS18), myocontraction (PDE3B, CASQ2, and MYH10), and neurological responses (FOS, NCAM2, SYT1, SLC22A3, DOCK3, LRRTM1, LRRTM3, PRSS12, and ARPP21). The analysis of differential gene expressions between deciduous and permanent PDL tissues aids our understanding of histological and functional differences between them at the molecular level.
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14
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Wasserman E, Webster D, Kuhn G, Attar-Namdar M, Müller R, Bab I. Differential load-regulated global gene expression in mouse trabecular osteocytes. Bone 2013. [PMID: 23201221 DOI: 10.1016/j.bone.2012.11.017] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Osteocytes are considered the skeletal mechanosensors. However, because osteocytes, particularly trabecular, are barely accessible to in vivo molecular analyses, very little is known on the signals transmitted by these cells to the extra-trabecular milieu. To investigate so called "osteocytic genes" involved in extracellular signaling, we have used a recently developed model whereby a single caudal mouse vertebra (C5) is subjected to controlled compression loading and further devised a method for the isolation of high quality RNA from trabecular osteocytes. RNA samples from loaded and sham-loaded individual vertebrae where then subjected to gene array analysis following the administration of a single or repetitive loading doses (thrice weekly for 4 weeks). Focusing on extracellular genes potentially involved in mediating osteocyte-derived signals to the trabecular surface, we identified sets of genes differentially regulated by either single or multiple loading bouts as well as genes affected by both loading protocols. A comparison with published studies on load-regulated genes in cortical osteocytes revealed that the majority of these genes are specifically activated/silenced in the trabecular bone. Many of these genes could be clustered according to processes directly relevant to the life cycle and activity of osteoblasts and osteoclasts and their progenitors. The present findings are consistent with an osteocytic role in the control of trabecular bone remodeling and mass and provide a comprehensive database of load-regulated genes in trabecular osteocytes that is potentially useful in further mouse genetic studies and identification of drug targets to combat osteoporosis.
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Affiliation(s)
- Elad Wasserman
- Institute for Biomechanics, ETH Zürich, Wolfgang-Pauli-Strasse 10, 8093 Zurich, Switzerland.
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Mazzoni A, Breschi L, Carrilho M, Nascimento FD, Orsini G, Ruggeri A, Gobbi P, Manzoli L, Tay FR, Pashley DH, Tjäderhane L. A review of the nature, role, and function of dentin non-collagenous proteins. Part II: enzymes, serum proteins, and growth factors. ACTA ACUST UNITED AC 2012. [DOI: 10.1111/j.1601-1546.2012.00268.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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16
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Remodeling of extracellular matrices initiates and advances calcification during development and healing of bones and teeth. J Oral Biosci 2012. [DOI: 10.1016/j.job.2011.06.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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17
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Hou C, Liu ZX, Tang KL, Wang MG, Sun J, Wang J, Li S. Developmental changes and regional localization of Dspp, Mepe, Mimecan and Versican in postnatal developing mouse teeth. J Mol Histol 2011; 43:9-16. [DOI: 10.1007/s10735-011-9368-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2011] [Accepted: 10/16/2011] [Indexed: 12/31/2022]
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18
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Comparative immunolocalization of the elastin fiber-associated proteins fibrillin-1, LTBP-2, and MAGP-1 with components of the collagenous and proteoglycan matrix of the fetal human intervertebral disc. Spine (Phila Pa 1976) 2011; 36:E1365-72. [PMID: 21540769 DOI: 10.1097/brs.0b013e31821fd23e] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
STUDY DESIGN A comparative immunolocalization study of elastin-associated proteins and established intervertebral disc (IVD) extracellular matrix (ECM) components. OBJECTIVE To localize for the first time, elastic fiber–associated proteins with structural fibrillar components in the annulus fibrosus (AF) of the fetal IVD. SUMMARY OF BACKGROUND DATA Elastin has been identified histochemically in adult bovine, human, and immature rat IVDs, and in fetal human IVDs using electron microscopy; however, no immunolocalization studies have been undertaken for associated components in human fetal IVDs. METHODS En-bloc fixation of thoracolumbar spinal segments in formalin and Histochoice followed by standard histochemical processing, paraffin embedding, microtome sectioning, and identification of IVD ECM components using a range of specific mono- and polyclonal antibodies and bright-field and laser scanning confocal microscopy. RESULTS The elastic fiber-associated proteins fibrillin-1, LTBP-2, and MAGP-1 were prominently immunolocalized in the outer lamellar layers of the AF of the human fetal IVD. Dual localization of selected components by confocal microscopy demonstrated that versican and LTBP-2 were colocalized with fibrillin-1 microfibrils in the AF lamellae with a similar distribution to the elastin fibers. LTBP-2 was also associated with pericellular perlecan in the outer AF. These interconnections between elastin-associated proteins resulted in an elastic network, which connected the AF cells with the adjacent cartilaginous vertebral bodies. CONCLUSION Specific immunolocalization of fibrillin-1, MAGP-1, and versican with elastin in the outer AF of the fetal human IVD has been demonstrated. We deduce from the established distributions of the elastin-associated proteins and their known interactivities with matrix components that these stabilize and aid in the integration of the elastic fibers in the annular lamellae and may be responsible for the generation of tensional forces in the outer AF, which direct the assembly of this tissue.
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Hakki SS, Foster BL, Nagatomo KJ, Bozkurt SB, Hakki EE, Somerman MJ, Nohutcu RM. Bone Morphogenetic Protein-7 Enhances Cementoblast Function In Vitro. J Periodontol 2010; 81:1663-74. [DOI: 10.1902/jop.2010.100074] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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21
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Sasaki H, Muramatsu T, Kwon HJ, Yamamoto H, Hashimoto S, Jung HS, Shimono M. Down-regulated genes in mouse dental papillae and pulp. J Dent Res 2010; 89:679-83. [PMID: 20448247 DOI: 10.1177/0022034510366844] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Important factors involved in odontogenesis in mouse dental papillae disappear between the pre- and post-natal stages of development. Therefore, we hypothesized that certain genes involved in odontogenesis in dental papillae were subject to pre-/post-natal down-regulation. Our goal was to identify, by microarray analysis, which genes were down-regulated. Dental papillae were isolated from embryonic 16-day-, 18-day- (E16, E18), and post-natal 3-day-old (P3) murine first mandibular molar germs and analyzed by microarray. The number of down-regulated genes was 2269 between E16 and E18, and 3130 between E18 and P3. Drastic down-regulation (fold change > 10.0) of Adamts4, Aldha1a2, and Lef1 was observed at both E16 and E18, and quantitative RT-PCR revealed a post-natal reduction in their expression (Adamts4, 1/3; Aldh1a2, 1/13; and Lef1, 1/37). These results suggest that down-regulation of these three genes is an important factor in normal odontogenesis in dental papillae.
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Affiliation(s)
- H Sasaki
- Oral Health Science Center HRC7, Tokyo Dental College, Japan
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22
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Shukla S, Nair R, Rolle MW, Braun KR, Chan CK, Johnson PY, Wight TN, McDevitt TC. Synthesis and organization of hyaluronan and versican by embryonic stem cells undergoing embryoid body differentiation. J Histochem Cytochem 2009; 58:345-58. [PMID: 20026669 DOI: 10.1369/jhc.2009.954826] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Embryonic stem cells (ESCs) provide a convenient model to probe the molecular and cellular dynamics of developmental cell morphogenesis. ESC differentiation in vitro via embryoid bodies (EBs) recapitulates many aspects of early stages of development, including the epithelial-mesenchymal transition (EMT) of pluripotent cells into more differentiated progeny. Hyaluronan and versican are important extracellular mediators of EMT processes, yet the temporal expression and spatial distribution of these extracellular matrix (ECM) molecules during EB differentiation remains undefined. Thus, the objective of this study was to evaluate the synthesis and organization of hyaluronan and versican by using murine ESCs during EB differentiation. Hyaluronan and versican (V0 and V1 isoforms), visualized by immunohistochemistry and evaluated biochemically, accumulated within EBs during the course of differentiation. Interestingly, increasing amounts of a 70-kDa proteolytic fragment of versican were also detected over time, along with ADAMTS-1 and -5 protein expression. ESCs expressed each of the hyaluronan synthases (HAS) -1, -2, and -3 and versican splice variants (V0, V1, V2, and V3) throughout EB differentiation, but HAS-2, V0, and V1 were expressed at significantly increased levels at each time point examined. Hyaluronan and versican exhibited overlapping expression patterns within EBs in regions of low cell density, and versican expression was excluded from clusters of epithelial (cytokeratin-positive) cells but was enriched within the vicinity of mesenchymal (N-cadherin-positive) cells. These results indicate that hyaluronan and versican synthesized by ESCs within EB microenvironments are associated with EMT processes and furthermore suggest that endogenously produced ECM molecules play a role in ESC differentiation. This manuscript contains online supplemental material at http://www.jhc.org. Please visit this article online to view these materials.
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Affiliation(s)
- Shreya Shukla
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia, USA
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Ruggeri A, Orsini G, Mazzoni A, Nato F, Papa V, Piccirilli M, Putignano A, Mazzotti G, De Stefano Dorigo E, Breschi L. Immunohistochemical and biochemical assay of versican in human sound predentine/dentine matrix. Eur J Histochem 2009; 53:e15. [PMID: 30256870 PMCID: PMC3168232 DOI: 10.4081/ejh.2009.e15] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/05/2009] [Indexed: 11/22/2022] Open
Abstract
Aim of this study was to investigate the distribution of versican proteoglycan within the human dentine organic matrix by means of a correlative immunohistochemical analysis with field emission in-lens scanning electron microscope (FEI-SEM), transmission electron microscope (TEM), fluorescence microscope (FM) and biochemical assay. Specimens containing dentine and predentine were obtained from non carious human teeth and divided in three groups: 1) FEI-SEM group: sections were exposed to a pre-embedding immunohistochemical procedure; 2) TEM group: specimens were fixed, demineralised, embedded and submitted to a post-embedding immunohistochemical procedure; 3) FM group: sections mineralised and submitted to a pre-embedding immunohistochemical procedure with fluorescence labelling. Specimens were exposed to two different antibodies to assay distribution of versican fragments and whole versican molecule. Western Blotting analysis of dentine and pulp extracts was also performed. The correlative FEI-SEM,TEM and FM analysis revealed positive immunoreaction for versican fragments both in predentine and dentine, while few gold particles identifying the whole versican molecule were found in predentine only under TEM. No labelling of versican whole molecule was detected by FEI-SEM and FM analysis. The immunoblotting analysis confirmed the morphological findings. This study suggests that in fully developed human teeth versican fragments are significant constituents of the human dentine and predentine organic matrix, while versican whole molecule can be visualised in scarce amount within predentine only. The role of versican fragments within human dentine organic matrix should be further elucidated.
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Affiliation(s)
- A Ruggeri
- Department of SAU&FAL, University of Bologna, Italy
| | - G Orsini
- Department of Clinical Sciences and Stomatology, Polytechnic University of Marche, Ancona, Italy
| | - A Mazzoni
- Department of SAU&FAL, University of Bologna, Italy
| | - F Nato
- Department of SAU&FAL, University of Bologna, Italy.,Department of SUAN, University of Urbino, Urbino Italy
| | - V Papa
- Department of SAU&FAL, University of Bologna, Italy
| | - M Piccirilli
- Department of Stomatology and Oral Science, University of Chieti-Pescara, Italy
| | - A Putignano
- Department of Clinical Sciences and Stomatology, Polytechnic University of Marche, Ancona, Italy
| | - G Mazzotti
- Department of SAU&FAL, University of Bologna, Italy
| | - E De Stefano Dorigo
- Unit of Dental Sciences and Biomaterials, Department of Biomedicine, University of Trieste
| | - L Breschi
- Unit of Dental Sciences and Biomaterials, Department of Biomedicine, University of Trieste.,Unit of Dental Sciences and Biomaterials, Department of Biomedicine, University of Trieste
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Ababneh KT, Al-Khateeb TH. Immunolocalization of proteoglycans in Meckel's cartilage of the rat. Open Dent J 2009; 3:177-83. [PMID: 19746167 PMCID: PMC2737126 DOI: 10.2174/1874210600903010177] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2008] [Revised: 02/04/2009] [Accepted: 02/26/2009] [Indexed: 12/14/2022] Open
Abstract
The aim of this study was to investigate the presence and distribution of proteoglycans within Meckel’s cartilage of rat embryos. A standard indirect immunoperoxidase technique was used on paraffin sections of rat heads. Sections were incubated with monoclonal antibodies recognising core protein epitopes in the proteoglycans versican and CD44. Polyclonal antibodies localized the proteoglycans decorin, biglycan and lumican. Versican was expressed by chondrocytes, but very weekly by the extracellular matrix. Decorin was strongly expressed by both of chondrocytes and the ECM. Both of biglycan and lumican were moderately expressed by chondrocytes, but weakly by the extracellular matrix. CD44 was weakly expressed by chondrocytes only, without staining of the ECM. It is concluded that Meckel’s cartilage chondrocytes express the proteoglycans versican, decorin, biglycan, lumican and CD44 at variable levels during development in the rat. Such data are important for a greater understanding of the changes that take place during mandibular development. Further studies are needed to elucidate the exact role of proteoglycans during Meckel’s cartilage and mandibular organogenesis.
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Affiliation(s)
- Khansa Taha Ababneh
- Faculty of Dentistry, Jordan University of Science and Technology, Irbid, Jordan
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Itagaki T, Honma T, Takahashi I, Echigo S, Sasano Y. Quantitative Analysis and Localization of mRNA Transcripts of Type I Collagen, Osteocalcin, MMP 2, MMP 8, and MMP 13 During Bone Healing in a Rat Calvarial Experimental Defect Model. Anat Rec (Hoboken) 2008; 291:1038-46. [DOI: 10.1002/ar.20717] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Hopwood B, Tsykin A, Findlay DM, Fazzalari NL. Microarray gene expression profiling of osteoarthritic bone suggests altered bone remodelling, WNT and transforming growth factor-beta/bone morphogenic protein signalling. Arthritis Res Ther 2008; 9:R100. [PMID: 17900349 PMCID: PMC2212557 DOI: 10.1186/ar2301] [Citation(s) in RCA: 140] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2007] [Revised: 09/10/2007] [Accepted: 09/27/2007] [Indexed: 01/22/2023] Open
Abstract
Osteoarthritis (OA) is characterized by alterations to subchondral bone as well as articular cartilage. Changes to bone in OA have also been identified at sites distal to the affected joint, which include increased bone volume fraction and reduced bone mineralization. Altered bone remodelling has been proposed to underlie these bone changes in OA. To investigate the molecular basis for these changes, we performed microarray gene expression profiling of bone obtained at autopsy from individuals with no evidence of joint disease (control) and from individuals undergoing joint replacement surgery for either degenerative hip OA, or fractured neck of femur (osteoporosis [OP]). The OP sample set was included because an inverse association, with respect to bone density, has been observed between OA and the low bone density disease OP. Compugen human 19K-oligo microarray slides were used to compare the gene expression profiles of OA, control and OP bone samples. Four sets of samples were analyzed, comprising 10 OA-control female, 10 OA-control male, 10 OA-OP female and 9 OP-control female sample pairs. Print tip Lowess normalization and Bayesian statistical analyses were carried out using linear models for microarray analysis, which identified 150 differentially expressed genes in OA bone with t scores above 4. Twenty-five of these genes were then confirmed to be differentially expressed (P < 0.01) by real-time PCR analysis. A substantial number of the top-ranking differentially expressed genes identified in OA bone are known to play roles in osteoblasts, osteocytes and osteoclasts. Many of these genes are targets of either the WNT (wingless MMTV integration) signalling pathway (TWIST1, IBSP, S100A4, MMP25, RUNX2 and CD14) or the transforming growth factor (TGF)-β/bone morphogenic protein (BMP) signalling pathway (ADAMTS4, ADM, MEPE, GADD45B, COL4A1 and FST). Other differentially expressed genes included WNT (WNT5B, NHERF1, CTNNB1 and PTEN) and TGF-β/BMP (TGFB1, SMAD3, BMP5 and INHBA) signalling pathway component or modulating genes. In addition a subset of genes involved in osteoclast function (GSN, PTK9, VCAM1, ITGB2, ANXA2, GRN, PDE4A and FOXP1) was identified as being differentially expressed in OA bone between females and males. Altered expression of these sets of genes suggests altered bone remodelling and may in part explain the sex disparity observed in OA.
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Affiliation(s)
- Blair Hopwood
- Division of Tissue Pathology, Institute of Medical & Veterinary Science, Frome Road, Adelaide, South Australia, 5000, Australia
- Hanson Institute, Frome Road, Adelaide, South Australia, 5000, Australia
| | - Anna Tsykin
- School of Mathematics, University of Adelaide, North Terrace, Adelaide, South Australia, 5005, Australia
| | - David M Findlay
- Hanson Institute, Frome Road, Adelaide, South Australia, 5000, Australia
- Discipline of Orthopaedics & Trauma, University of Adelaide, North Terrace, Adelaide, South Australia, 5005, Australia
| | - Nicola L Fazzalari
- Division of Tissue Pathology, Institute of Medical & Veterinary Science, Frome Road, Adelaide, South Australia, 5000, Australia
- Hanson Institute, Frome Road, Adelaide, South Australia, 5000, Australia
- Discipline of Pathology, University of Adelaide, North Terrace, Adelaide, South Australia, 5005, Australia
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Sakuraba I, Hatakeyama J, Hatakeyama Y, Takahashi I, Mayanagi H, Sasano Y. The MMP activity in developing rat molar roots and incisors demonstrated by in situ zymography. J Mol Histol 2006; 37:87-93. [PMID: 16830066 DOI: 10.1007/s10735-006-9037-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2006] [Accepted: 05/26/2006] [Indexed: 10/24/2022]
Abstract
Matrix metalloproteinases (MMPs) have been expressed during root development and periodontal tissue formation, whereas it is not known if these MMP molecules are enzymatically active to degrade the extracellular matrices (ECMs). The present study was designed to investigate the gelatinolytic and collagenolytic activity in rat molar root and incisor development. Three-week old rat mandibles were frozen and cut without fixation or decalcification and processed for in situ zymography using substrates gelatin and collagen. The enzymatic activity was assessed according to the intensity of fluorescence due to the lysis of the substrates. Odontoblasts, predentin, cementum, bone and the enamel matrix showed the high activity. The present study demonstrated MMP activity in calcified tissues using in situ zymography for the first time and the possible involvement of the MMP activity in molar root and incisor development and periodontal tissue formation.
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Affiliation(s)
- Ichiro Sakuraba
- Division of Pediatric Dentistry, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
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