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Marín-Márquez C, Kirby J, Hunter KD. Molecular pathogenesis of ameloblastoma. J Oral Pathol Med 2024; 53:277-293. [PMID: 38664938 DOI: 10.1111/jop.13538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 03/08/2024] [Accepted: 04/08/2024] [Indexed: 05/16/2024]
Abstract
Ameloblastoma (AM) is a benign, although aggressive, epithelial odontogenic tumour originating from tooth-forming tissues or remnants. Its aetiopathogenesis remains unclear; however, molecular analysis techniques have allowed researchers to progress in understanding its genetic basis. The high frequency of BRAF p.V600E as a main driver mutation in AM is well established; nevertheless, it is insufficient to explain its tumourigenesis. In this review, we aimed to integrate the current knowledge about the biology of AM and to describe the main genetic alterations reported, focusing on the findings of large-scale sequencing and gene expression profiling techniques. Current evidence shows that besides BRAF mutation and activation of the MAPK pathway, alterations in Hedgehog and Wnt/β-catenin pathway-related genes are also involved in AM pathogenesis. Recently, a tumour suppressor gene, KMT2D, has been reported as mutated by different research groups. The biological impact of these mutations in the pathogenesis of AM has yet to be elucidated. Further studies are needed to clarify the impact of these findings in the identification of novel biomarkers that could be useful for diagnosing, classifying, and molecular targeting this neoplasm.
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Affiliation(s)
- Constanza Marín-Márquez
- Unit of Oral and Maxillofacial Medicine, Pathology and Surgery, University of Sheffield, Sheffield, UK
- Facultad de Odontología y Ciencias de la Rehabilitación, Universidad San Sebastián, Puerto Montt, Chile
| | - Janine Kirby
- Department of Neuroscience, Sheffield Institute for Translational Neuroscience, University of Sheffield, Sheffield, UK
| | - Keith D Hunter
- Liverpool Head and Neck Centre, Molecular and Clinical Cancer Medicine, University of Liverpool, Liverpool, UK
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2
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Grillo R. Analysis of the 100 most cited articles on ameloblastoma. Oral Maxillofac Surg 2023; 27:387-397. [PMID: 35654987 DOI: 10.1007/s10006-022-01082-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 05/27/2022] [Indexed: 10/18/2022]
Abstract
OBJECTIVES An increasing number of articles are published each year. The aim of this is to provide a list of the 100 most cited articles on the subject of ameloblastoma. METHODS A bibliographic search was performed on Google Scholar (GS), Microsoft Academic (MA), and Dimensions for ameloblastoma. A ranking was created in order of citation density. Graphical representations of keywords and authorship were created with VOSviewer. Statistical analysis was performed and only results with a 95% confidence interval were considered significant. RESULTS A helpful list of top 100 articles was developed to help professionals in a variety of ways. Some curiosities are discussed about this scientometric analysis in ameloblastoma articles. CONCLUSIONS A useful list of the top 100 most cited articles on ameloblastoma has been provided. Bibliometric and altmetric analysis using Google Scholar, Microsoft Academic, and Dimensions is a free and excellent tool, not only as a citation manager but also as a study reference.
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Affiliation(s)
- Ricardo Grillo
- Department of Oral & Maxillofacial Surgery, Faculdade Patos de Minas (Planalto Central), SIA trecho 8 lote 70/80 Guará, Brasília, DF, 71205-080, Brazil.
- Department of Oral & Maxillofacial Surgery, Faculdade São Leopoldo Mandic, Campinas, Brazil.
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Correa-Arzate L, Portilla-Robertson J, Ramírez-Jarquín JO, Jacinto-Alemán LF, Mejía-Velázquez CP, Villanueva-Sánchez FG, Rodríguez-Vázquez M. LRP5, SLC6A3, and SOX10 Expression in Conventional Ameloblastoma. Genes (Basel) 2023; 14:1524. [PMID: 37628576 PMCID: PMC10453908 DOI: 10.3390/genes14081524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 07/20/2023] [Accepted: 07/21/2023] [Indexed: 08/27/2023] Open
Abstract
Cell proliferation and invasion are characteristic of many tumors, including ameloblastoma, and are important features to target in possible future therapeutic applications. OBJECTIVE The objective of this study was the identification of key genes and inhibitory drugs related to the cell proliferation and invasion of ameloblastoma using bioinformatic analysis. METHODS The H10KA_07_38 gene profile database was analyzed by Rstudio and ShinyGO Gene Ontology enrichment. String, Cytoscape-MCODE, and Kaplan-Meier plots were generated, which were subsequently validated by RT-qPCR relative expression and immunoexpression analyses. To propose specific inhibitory drugs, a bioinformatic search using Drug Gene Budger and DrugBank was performed. RESULTS A total of 204 significantly upregulated genes were identified. Gene ontology enrichment analysis identified four pathways related to cell proliferation and cell invasion. A total of 37 genes were involved in these pathways, and 11 genes showed an MCODE score of ≥0.4; however, only SLC6A3, SOX10, and LRP5 were negatively associated with overall survival (HR = 1.49 (p = 0.0072), HR = 1.55 (p = 0.0018), and HR = 1.38 (p = 0.025), respectively). The RT-qPCR results confirmed the significant differences in expression, with overexpression of >2 for SLC6A3 and SOX10. The immunoexpression analysis indicated positive LRP5 and SLC6A3 expression. The inhibitory drugs bioinformatically obtained for the above three genes were parthenolide and vorinostat. CONCLUSIONS We identify LRP5, SLC6A3, and SOX10 as potentially important genes related to cell proliferation and invasion in the pathogenesis of ameloblastomas, along with both parthenolide and vorinostat as inhibitory drugs that could be further investigated for the development of novel therapeutic approaches against ameloblastoma.
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Affiliation(s)
- Lorena Correa-Arzate
- Department of Oral Medicine and Pathology, Postgraduate Division, Dental School, National Autonomous University of Mexico, Mexico City 04510, Mexico (J.P.-R.); (C.P.M.-V.)
| | - Javier Portilla-Robertson
- Department of Oral Medicine and Pathology, Postgraduate Division, Dental School, National Autonomous University of Mexico, Mexico City 04510, Mexico (J.P.-R.); (C.P.M.-V.)
| | - Josué Orlando Ramírez-Jarquín
- Neurosciences Division, Cellular Physiology Institute, National Autonomous University of Mexico, Mexico City 04510, Mexico
| | - Luis Fernando Jacinto-Alemán
- Department of Oral Medicine and Pathology, Postgraduate Division, Dental School, National Autonomous University of Mexico, Mexico City 04510, Mexico (J.P.-R.); (C.P.M.-V.)
| | - Claudia Patricia Mejía-Velázquez
- Department of Oral Medicine and Pathology, Postgraduate Division, Dental School, National Autonomous University of Mexico, Mexico City 04510, Mexico (J.P.-R.); (C.P.M.-V.)
| | | | - Mariana Rodríguez-Vázquez
- Infectomic and Molecular Pathogenesis Department, CINVESTAV, National Polytechnic Institute, Mexico City 07738, Mexico;
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Jiravejchakul N, Abe GL, Loza M, Park S, Matangkasombut P, Sasaki JI, Imazato S, Diez D, Standley DM. Intercellular crosstalk in adult dental pulp is mediated by heparin-binding growth factors Pleiotrophin and Midkine. BMC Genomics 2023; 24:184. [PMID: 37024794 PMCID: PMC10077760 DOI: 10.1186/s12864-023-09265-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Accepted: 03/21/2023] [Indexed: 04/08/2023] Open
Abstract
BACKGROUND In-depth knowledge of the cellular and molecular composition of dental pulp (DP) and the crosstalk between DP cells that drive tissue homeostasis are not well understood. To address these questions, we performed a comparative analysis of publicly available single-cell transcriptomes of healthy adult human DP to 5 other reference tissues: peripheral blood mononuclear cells, bone marrow, adipose tissue, lung, and skin. RESULTS Our analysis revealed that DP resident cells have a unique gene expression profile when compared to the reference tissues, and that DP fibroblasts are the main cell type contributing to this expression profile. Genes coding for pleiotrophin (PTN) and midkine (MDK), homologous heparin-binding growth-factors, possessed the highest differential expression levels in DP fibroblasts. In addition, we identified extensive crosstalk between DP fibroblasts and several other DP resident cells, including Schwann cells, mesenchymal stem cells and odontoblasts, mediated by PTN and MDK. CONCLUSIONS DP fibroblasts emerge as unappreciated players in DP homeostasis, mainly through their crosstalk with glial cells. These findings suggest that fibroblast-derived growth factors possess major regulatory functions and thus have a potential role as dental therapeutic targets.
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Affiliation(s)
- Natnicha Jiravejchakul
- Department of Genome Informatics, Research Institute for Microbial Diseases, Osaka University, 3-1 Yamadaoka, Suita, 565-0871, Japan
- Department of Microbiology, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand
| | - Gabriela L Abe
- Department of Advanced Functional Materials Science, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, 565-0871, Japan.
| | - Martin Loza
- Laboratory of Functional Analysis in silico, Human Genome Center, The Institute of Medical Science, The University of Tokyo, 4-6-1 Shirokane-dai, Minato-ku, Tokyo, 108- 8639, Japan
| | - Soyoung Park
- Department of Systems Immunology, Immunology Frontier Research Center, Osaka University, 3-1 Yamadaoka, Suita, 565-0871, Japan
| | - Ponpan Matangkasombut
- Department of Microbiology, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand
| | - Jun-Ichi Sasaki
- Department of Dental Biomaterials, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, 565-0871, Japan
| | - Satoshi Imazato
- Department of Advanced Functional Materials Science, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, 565-0871, Japan
- Department of Dental Biomaterials, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, 565-0871, Japan
| | - Diego Diez
- Quantitative Immunology Research Unit, Immunology Frontier Research Center, Osaka University, 3-1 Yamadaoka, Suita, 565-0871, Japan
| | - Daron M Standley
- Department of Genome Informatics, Research Institute for Microbial Diseases, Osaka University, 3-1 Yamadaoka, Suita, 565-0871, Japan.
- Department of Systems Immunology, Immunology Frontier Research Center, Osaka University, 3-1 Yamadaoka, Suita, 565-0871, Japan.
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Magalhães MCSV, Felix FA, Guimarães LM, Dos Santos JN, de Marco LA, Gomez RS, Gomes CC, de Sousa SF. Interrogation of TERT promoter hotspot mutations in ameloblastoma and ameloblastic carcinoma. J Oral Pathol Med 2023; 52:271-275. [PMID: 36169975 DOI: 10.1111/jop.13364] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Accepted: 09/07/2022] [Indexed: 11/29/2022]
Abstract
BACKGROUND TERT promoter mutations increase telomerase activity, conferring cell immortality. The coexistence of TERT promoter mutations with BRAFV600E is associated with aggressiveness. Ameloblastoma and ameloblastic carcinoma are infiltrative neoplasms that harbor BRAFV600E; however, it remains unknown if these odontogenic tumors also show TERT promoter mutations. METHODS Genomic DNA of paraffin-embedded ameloblastomas (n = 6) and ameloblastic carcinomas (n = 3) were Sanger-sequenced to assess the hotspot TERT promoter mutations C228T and C250T. BRAFV600E status was screened by TaqMan allele-specific quantitative polymerase chain reaction. RESULTS None of the samples harbored TERT promoter mutations. The BRAFV600E mutation was positive in 3 of 6 of ameloblastomas and in 1 of 3 of ameloblastic carcinomas. CONCLUSION The absence of TERT promoter mutation in the samples indicates that this molecular event is not relevant to the tumors' pathogenesis. Further studies are necessary to explore undefined genetic or epigenetic mechanisms related to TERT-upregulation in ameloblastoma, and the telomerase activity in ameloblastic carcinoma.
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Affiliation(s)
| | - Fernanda Aragão Felix
- Department of Oral Surgery and Pathology, School of Dentistry, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Letícia Martins Guimarães
- Department of Pathology, Biological Sciences Institute, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Jean Nunes Dos Santos
- Laboratory of Oral and Maxillofacial Pathology, School of Dentistry, Federal University of Bahia (UFBA), Salvador, Brazil
| | - Luiz Armando de Marco
- Department of Surgery, Medical School, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Ricardo Santiago Gomez
- Department of Oral Surgery and Pathology, School of Dentistry, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Carolina Cavaliéri Gomes
- Department of Pathology, Biological Sciences Institute, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Sílvia Ferreira de Sousa
- Department of Oral Surgery and Pathology, School of Dentistry, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
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Khami MR, Asgari S, Valizadeh S, Karami J, Rezaei A, Rezaei N. AMELX and ENAM Polymorphisms and Dental Caries. Int J Dent 2022; 2022:8501179. [PMID: 36624859 PMCID: PMC9825226 DOI: 10.1155/2022/8501179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 12/01/2022] [Accepted: 12/19/2022] [Indexed: 01/02/2023] Open
Abstract
Introduction The variety of the genetic factors playing role in development of dental caries calls for further research in this regard. The aim of the present study was to investigate the differences between caries-free adults and adults with dental caries in terms of polymorphism of caries-related genes (AMELX and ENAM). Methods The present case-control study was performed on 81 adults aged 18-24 years, 41 caries free, and 40 with a DMFT ≥ 4. A questionnaire containing background and demographic information (such as age, gender, time and type of latest dental check-ups, parent's education, oral self-care, and the place of residence in the first 12 years of life) was completed by participants at the time of examination. The blood sample was taken from each participant in the EDTA tube, and PCR was performed. Gene diversity of AMELX and ENAM genes was compared between the two groups. Results Regarding AMELX gene, in the caries-free group 33 (80.5%) and in the group with DMFT ≥ 4, 33 (82.5%) students had TT genotype, but this difference was insignificant. For ENAM gene, in the caries-free group 34 (82.9%) and in the group with DMFT ≥ 4, 39 (97.5%) students had TT genotype, but this difference was insignificant (P value = 0.048, CI 95%:0.02-1.27, and OR = 0.145). Conclusion There was no relationship between TT and TC genotypes of single nucleotide polymorphism of AMELX and ENAM gene and susceptibility to dental caries, but with increasing sample size, there may be a relationship between SNP of ENAM gene and being caries free.
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Affiliation(s)
- Mohammad Reza Khami
- Research Center for Caries Prevention Dentistry Research, Institute Community Oral Health Department, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | - Sahar Asgari
- Department of Periodontology, School of Dentistry, Babol University of Medical Sciences, Babol, Iran
| | - Sara Valizadeh
- Department of Operative Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | - Jafar Karami
- Molecular and Medicine Research Center, Khomein University of Medical Sciences, Khomein, Iran
| | - Arezou Rezaei
- Research Center for Immunodeficiencies, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Nima Rezaei
- Research Center for Immunodeficiencies, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
- Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
- Network of Immunity in Infection, Malignancy and Autoimmunity (NIIMA) Universal Scientific Education and Research Network (USERN), Tehran, Iran
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Conventional Ameloblastoma. A Case Report with Microarray and Bioinformatic Analysis. Diagnostics (Basel) 2022; 12:diagnostics12123190. [PMID: 36553196 PMCID: PMC9777305 DOI: 10.3390/diagnostics12123190] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 12/08/2022] [Accepted: 12/14/2022] [Indexed: 12/23/2022] Open
Abstract
Ameloblastoma is a rare benign epithelial odontogenic neoplasm, but with great clinical implications, as despite its benignity and slow growth, most cases are locally aggressive with a significant recurrence rate. Histological, cellular, or molecular analyses of its pathogenesis have confirmed the complexity of this neoplasm. We present the case of a 20-year-old patient with a suggestive clinical and radiographic diagnosis of ameloblastoma. An incisional biopsy was obtained confirming the diagnosis of conventional ameloblastoma. Left hemimandibulectomy and plate reconstruction were performed. Histopathological analysis of the surgical specimen confirmed the conventional ameloblastoma with a plexiform pattern and significant areas of cystic degeneration and amyloid-like-like deposits. Additionally, a microarray was carried out with bioinformatic analysis for the enrichment, protein interaction, and determination of eight hub genes (CRP, BCHE, APP, AKT1, AGT, ACTC1, ADAM10, and APOA2) related to their pathogenesis.
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8
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Canonical Hedgehog Pathway and Noncanonical GLI Transcription Factor Activation in Cancer. Cells 2022; 11:cells11162523. [PMID: 36010600 PMCID: PMC9406872 DOI: 10.3390/cells11162523] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 08/01/2022] [Accepted: 08/05/2022] [Indexed: 01/12/2023] Open
Abstract
The Hedgehog signaling pathway is one of the fundamental pathways required for development and regulation of postnatal regeneration in a variety of tissues. The pathway has also been associated with cancers since the identification of a mutation in one of its components, PTCH, as the cause of Basal Cell Nevus Syndrome, which is associated with several cancers. Our understanding of the pathway in tumorigenesis has expanded greatly since that initial discovery over two decades ago. The pathway has tumor-suppressive and oncogenic functions depending on the context of the cancer. Furthermore, noncanonical activation of GLI transcription factors has been reported in a number of tumor types. Here, we review the roles of canonical Hedgehog signaling pathway and noncanonical GLI activation in cancers, particularly epithelial cancers, and discuss an emerging concept of the distinct outcomes that these modes have on cancer initiation and progression.
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9
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Molecular biology exploration and targeted therapy strategy of Ameloblastoma. Arch Oral Biol 2022; 140:105454. [DOI: 10.1016/j.archoralbio.2022.105454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 05/09/2022] [Accepted: 05/10/2022] [Indexed: 11/19/2022]
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10
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Marín C, Niklander SE, Martínez-Flores R. Genetic Profile of Adenomatoid Odontogenic Tumor and Ameloblastoma. A Systematic Review. FRONTIERS IN ORAL HEALTH 2022; 2:767474. [PMID: 35048068 PMCID: PMC8757772 DOI: 10.3389/froh.2021.767474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 10/18/2021] [Indexed: 11/13/2022] Open
Abstract
Purpose: To perform a comprehensive and systematic critical appraisal of the genetic alterations reported to be present in adenomatoid odontogenic tumor (AOT) compared to ameloblastoma (AM), to aid in the understanding in their development and different behavior. Methods: An electronic search was conducted in PubMed, Scopus, and Web of Science during March 2021. Eligibility criteria included publications on humans which included genetic analysis of AOT or AM. Results: A total of 43 articles reporting 59 AOTs and 680 AMs were included. Different genomic techniques were used, including whole-exome sequencing, direct sequencing, targeted next-generation sequencing panels and TaqMan allele-specific qPCR. Somatic mutations affecting KRAS were identified in 75.9% of all AOTs, mainly G12V; whereas a 71% of the AMs harbored BRAF mutations, mainly V600E. Conclusions: The available genetic data reports that AOTs and AM harbor somatic mutations in well-known oncogenes, being KRAS G12V/R and BRAFV600E mutations the most common, respectively. The relatively high frequency of ameloblastoma compared to other odontogenic tumors, such as AOT, has facilitated the performance of different sequencing techniques, allowing the discovery of different mutational signatures. On the contrary, the low frequency of AOTs is an important limitation for this. The number of studies that have a assessed the genetic landscape of AOT is still very limited, not providing enough evidence to draw a conclusion regarding the relationship between the genomic alterations and its clinical behavior. Thus, the presence of other mutational signatures with clinical impact, co-occurring with background KRAS mutations or in wild-type KRAS cases, cannot be ruled out. Since BRAF and RAS are in the same MAPK pathway, it is interesting that ameloblastomas, frequently associated with BRAFV600E mutation have aggressive clinical behavior, but in contrast, AOTs, frequently associated with RAS mutations have indolent behavior. Functional studies might be required to solve this question.
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Affiliation(s)
- Constanza Marín
- Unidad de Patología y Medicina Oral, Facultad de Odontología, Universidad Andres Bello, Viña del Mar, Chile.,Unit of Oral and Maxillofacial Medicine, Pathology and Surgery, University of Sheffield, Sheffield, United Kingdom
| | - Sven E Niklander
- Unidad de Patología y Medicina Oral, Facultad de Odontología, Universidad Andres Bello, Viña del Mar, Chile
| | - René Martínez-Flores
- Unidad de Patología y Medicina Oral, Facultad de Odontología, Universidad Andres Bello, Viña del Mar, Chile
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JACINTO-ALEMÁN LF, PORTILLA-ROBERTSON J, LEYVA-HUERTA ER, RAMÍREZ-JARQUÍN JO, VILLANUEVA-SÁNCHEZ FG. Microarray and bioinformatic analysis of conventional ameloblastoma: an observational analysis. J Appl Oral Sci 2022. [DOI: 10.1590/1678-7757-2022-0308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
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12
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Peralta S, Duhamel GE, Katt WP, Heikinheimo K, Miller AD, Ahmed F, McCleary-Wheeler AL, Grenier JK. Comparative transcriptional profiling of canine acanthomatous ameloblastoma and homology with human ameloblastoma. Sci Rep 2021; 11:17792. [PMID: 34493785 PMCID: PMC8423744 DOI: 10.1038/s41598-021-97430-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 08/25/2021] [Indexed: 01/04/2023] Open
Abstract
Ameloblastomas are odontogenic tumors that are rare in people but have a relatively high prevalence in dogs. Because canine acanthomatous ameloblastomas (CAA) have clinicopathologic and molecular features in common with human ameloblastomas (AM), spontaneous CAA can serve as a useful translational model of disease. However, the molecular basis of CAA and how it compares to AM are incompletely understood. In this study, we compared the global genomic expression profile of CAA with AM and evaluated its dental origin by using a bulk RNA-seq approach. For these studies, healthy gingiva and canine oral squamous cell carcinoma served as controls. We found that aberrant RAS signaling, and activation of the epithelial-to-mesenchymal transition cellular program are involved in the pathogenesis of CAA, and that CAA is enriched with genes known to be upregulated in AM including those expressed during the early stages of tooth development, suggesting a high level of molecular homology. These results support the model that domestic dogs with spontaneous CAA have potential for pre-clinical assessment of targeted therapeutic modalities against AM.
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Affiliation(s)
- Santiago Peralta
- Department of Clinical Sciences, Clinical Programs Center, College of Veterinary Medicine, Cornell University, Box 31, Ithaca, NY, 14853, USA.
| | - Gerald E Duhamel
- Department of Biomedical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY, 14853, USA
| | - William P Katt
- Department of Molecular Medicine, College of Veterinary Medicine, Cornell University, Ithaca, NY, 14853, USA
| | - Kristiina Heikinheimo
- Department of Oral and Maxillofacial Surgery, Institute of Dentistry, University of Turku and Turku University Hospital, Turku, Finland
| | - Andrew D Miller
- Department of Biomedical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY, 14853, USA
| | - Faraz Ahmed
- Department of Biomedical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY, 14853, USA
| | - Angela L McCleary-Wheeler
- Department of Biomedical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY, 14853, USA
- Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, MO, 65211, USA
| | - Jennifer K Grenier
- Department of Biomedical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY, 14853, USA
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13
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Expression Profile of Stemness Markers CD138, Nestin and Alpha-SMA in Ameloblastic Tumours. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18083899. [PMID: 33917771 PMCID: PMC8068135 DOI: 10.3390/ijerph18083899] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 03/23/2021] [Accepted: 04/06/2021] [Indexed: 11/16/2022]
Abstract
Ameloblastic carcinoma is a rare malignant odontogenic neoplasm with a poor prognosis. It can arise de novo or from a pre-existing ameloblastoma. Research into stemness marker expression in ameloblastic tumours is lacking. This study aimed to explore the immunohistochemical expression of stemness markers nestin, CD138, and alpha-smooth muscle actin (alpha-SMA) for the characterisation of ameloblastic tumours. Six cases of ameloblastoma and four cases of ameloblastic carcinoma were assessed, including one case of ameloblastic carcinoma arising from desmoplastic ameloblastoma. In all tumour samples, CD138 was positive, whilst alpha-SMA was negative. Nestin was negative in all but one tumour sample. Conversely, the presence or absence of these markers varied in stroma samples. Nestin was observed in one ameloblastic carcinoma stroma sample, whilst CD138 was positive in one ameloblastoma case, one desmoplastic ameloblastoma case, and in two ameloblastic carcinoma stroma samples. Finally, alpha-SMA was found positive only in the desmoplastic ameloblastoma stroma sample. Our results suggest nestin expression to be an indicator for ameloblastic carcinoma, and CD138 and alpha-SMA to be promising biomarkers for the malignant transformation of ameloblastoma. Our data showed that nestin, CD138, and alpha-SMA are novel biomarkers for a better understanding of the origins and behaviour of ameloblastic tumours.
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14
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Bhuyan L, Nishat R, Behura SS, Mahapatra N, Kumar H. Insight into the molecular pathogenesis of odontogenic lesions. J Oral Biosci 2021; 63:35-44. [PMID: 33476705 DOI: 10.1016/j.job.2020.12.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Revised: 12/18/2020] [Accepted: 12/22/2020] [Indexed: 12/23/2022]
Abstract
BACKGROUND Odontogenic tumors, derived from epithelial, ectomesenchymal, and/or mesenchymal elements of the tooth-forming apparatus, constitute a heterogeneous group of lesions, including hamartomas, benign and malignant neoplasms with metastatic capabilities. HIGHLIGHT This review provides a comprehensive overviewof the pathogenesis of odontogenic tumors and explains the associated molecular events in the context of hallmarks of cancer established by Hanahan D and Weinberg RA. Diagrammatic representations depicted in the article would facilitate easier understanding. CONCLUSION A better understanding of the pathogenesis of the lesions may assist in determining patient's prognosis and devising better targeted therapeutic treatment, thus, reducing the morbidity and mortalityof patients.
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Affiliation(s)
- Lipsa Bhuyan
- Department of Oral Pathology and Microbiology, Kalinga Institute of Dental Sciences, KIIT Deemed to Be University, Bhubaneswar, Odisha, 751024, India.
| | - Roquaiya Nishat
- Department of Dentistry, Nalanda Medical College Hospital, Patna, Bihar, 800007, India.
| | - Shyam Sundar Behura
- Department of Oral Pathology and Microbiology, Kalinga Institute of Dental Sciences, KIIT Deemed to Be University, Bhubaneswar, Odisha, 751024, India.
| | - Niva Mahapatra
- Department of Oral Pathology and Microbiology, Kalinga Institute of Dental Sciences, KIIT Deemed to Be University, Bhubaneswar, Odisha, 751024, India.
| | - Harish Kumar
- Department of Oral Pathology and Microbiology, Kalinga Institute of Dental Sciences, KIIT Deemed to Be University, Bhubaneswar, Odisha, 751024, India.
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15
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Lambrou GI, Adamaki M, Hatziagapiou K, Vlahopoulos S. Gene Expression and Resistance to Glucocorticoid-Induced Apoptosis in Acute Lymphoblastic Leukemia: A Brief Review and Update. Curr Drug Res Rev 2021; 12:131-149. [PMID: 32077838 DOI: 10.2174/2589977512666200220122650] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 12/29/2019] [Accepted: 01/23/2020] [Indexed: 01/18/2023]
Abstract
BACKGROUND Resistance to glucocorticoid (GC)-induced apoptosis in Acute Lymphoblastic Leukemia (ALL), is considered one of the major prognostic factors for the disease. Prednisolone is a corticosteroid and one of the most important agents in the treatment of acute lymphoblastic leukemia. The mechanics of GC resistance are largely unknown and intense ongoing research focuses on this topic. AIM The aim of the present study is to review some aspects of GC resistance in ALL, and in particular of Prednisolone, with emphasis on previous and present knowledge on gene expression and signaling pathways playing a role in the phenomenon. METHODS An electronic literature search was conducted by the authors from 1994 to June 2019. Original articles and systematic reviews selected, and the titles and abstracts of papers screened to determine whether they met the eligibility criteria, and full texts of the selected articles were retrieved. RESULTS Identification of gene targets responsible for glucocorticoid resistance may allow discovery of drugs, which in combination with glucocorticoids may increase the effectiveness of anti-leukemia therapies. The inherent plasticity of clinically evolving cancer justifies approaches to characterize and prevent undesirable activation of early oncogenic pathways. CONCLUSION Study of the pattern of intracellular signal pathway activation by anticancer drugs can lead to development of efficient treatment strategies by reducing detrimental secondary effects.
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Affiliation(s)
- George I Lambrou
- First Department of Pediatrics, National and Kapodistrian University of Athens, Choremeio Research Laboratory, Athens, Greece
| | - Maria Adamaki
- First Department of Pediatrics, National and Kapodistrian University of Athens, Choremeio Research Laboratory, Athens, Greece
| | - Kyriaki Hatziagapiou
- First Department of Pediatrics, National and Kapodistrian University of Athens, Choremeio Research Laboratory, Athens, Greece
| | - Spiros Vlahopoulos
- First Department of Pediatrics, National and Kapodistrian University of Athens, Choremeio Research Laboratory, Athens, Greece
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16
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Ghafouri-Fard S, Atarbashi-Moghadam S, Taheri M. Genetic factors in the pathogenesis of ameloblastoma, dentigerous cyst and odontogenic keratocyst. Gene 2020; 771:145369. [PMID: 33346102 DOI: 10.1016/j.gene.2020.145369] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 11/28/2020] [Accepted: 12/11/2020] [Indexed: 02/06/2023]
Abstract
Ameloblastoma (AB), dentigerous cyst (DC) and Odontogenic keratocyst (OKC) are odontogenic lesions with propensity to malignant transformation or local invasion. The molecular mechanisms of development of these lesions are not fully understood. However, some researches have reported dysregulation of tumor suppressor genes or oncogenes in these lesions. Down-regulation of P53 gene has been reported in AB, DC and OKC. Moreover, several long non-coding RNAs such as ENST00000512916 and KIAA0125 have been dysregulated in AB tissues. Single nucleotide polymorphisms within a variety of genes have been associated with certain types of odontogenic lesions. In the current review, we summarize the current data about the expression pattern of genes in these lesions and the observed association between genetic polymorphisms and development of these lesions.
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Affiliation(s)
- Soudeh Ghafouri-Fard
- Dental Research Center, Research Institute for Dental Sciences, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Saede Atarbashi-Moghadam
- Department of Oral and Maxillofacial Pathology, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Taheri
- Urogenital Stem Cell Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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17
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Silva BS, Silva LR, Lima KL, Dos Santos AC, Oliveira AC, Dezzen-Gomide AC, Batista AC, Yamamoto-Silva FP. SOX2 and BCL-2 Expressions in Odontogenic Keratocyst and Ameloblastoma. Med Oral Patol Oral Cir Bucal 2020; 25:e283-e290. [PMID: 31967981 PMCID: PMC7103439 DOI: 10.4317/medoral.23348] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Accepted: 12/09/2019] [Indexed: 12/23/2022] Open
Abstract
Background The purpose of this experimental study was to compare the immunohistochemical expression of SOX2 and BCL-2 in Odontogenic Keratocyst (OKC) and Ameloblastoma (AB) specimens, and to identify a possible correlation in their expression.
Material and Methods Immunohistochemical analysis was performed to evaluate SOX2 and BCL-2 expression in OKC (n = 20) and AB (n = 20). The immunoexpression was analyzed by a quantitative and qualitative scoring system. The comparison between the immunoexpression of SOX 2 and BCL-2 was assessed by the Mann-Whitney U-test. Spearman’s correlation coefficient evaluated the correlation between SOX2 and BCL-2 expressions.
Results SOX2 and BCL-2 expression was observed in all specimens of OKC in the full thickness of the epithelium lining. SOX2 immunostaining was higher in OKC, in comparison with AB samples (P<0.05). BCL-2 immunostaining between OKC and AB was not statistically significant. There was no significant correlation between SOX2 and BCL-2 in OKC and AB specimens.
Conclusions SOX2 and BCL-2 expressions in OKC may suggest their relationship with the biological behavior of this lesion, and the higher expression of SOX2 might be an upstream influence on the Hh signaling pathway. Key words:Odontogenic keratocyst; Ameloblastoma; Odontogenic tumor; SOX2; BCL-2.
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Affiliation(s)
- B-S Silva
- University of Anápolis, Department of Oral Diagnosis Av. Universitária, km 3,5. Cidade Universitária CEP 75083-515, Anápolis, Brasil
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18
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Kondo S, Ota A, Ono T, Karnan S, Wahiduzzaman M, Hyodo T, Lutfur Rahman M, Ito K, Furuhashi A, Hayashi T, Konishi H, Tsuzuki S, Hosokawa Y, Kazaoka Y. Discovery of novel molecular characteristics and cellular biological properties in ameloblastoma. Cancer Med 2020; 9:2904-2917. [PMID: 32096304 PMCID: PMC7163100 DOI: 10.1002/cam4.2931] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 01/09/2020] [Accepted: 02/04/2020] [Indexed: 12/15/2022] Open
Abstract
Ameloblastoma is a rare odontogenic benign tumor accounting for less than 1% of head and neck tumors. Advanced next generation sequencing (NGS) analyses identified high frequency of BRAF V600E and SMO L412F mutations in ameloblastoma. Despite the existence of whole genomic sequence information from patients with ameloblastoma, entire molecular signature of and the characteristics of ameloblastoma cells are still obscure. In this study, we sought to uncover the molecular basis of ameloblastoma and to determine the cellular phenotype of ameloblastoma cells with BRAF mutations. Our comparative cDNA microarray analysis and gene set enrichment analysis (GSEA) showed that ameloblastoma exhibited a distinct gene expression pattern from the normal tissues: KRAS-responsive gene set is significantly activated in ameloblastoma. Importantly, insulin like growth factor 2 (IGF2), a member of KRAS-responsive genes, enhances the proliferation of an ameloblastoma cell line AMU-AM1 with BRAF mutation. In addition, Toll-like receptor 2 (TLR2) knockdown readily inactivated KRAS-responsive gene sets as well as increases caspase activities, suggesting that TLR2 signaling may mediate cell survival signaling in ameloblastoma cells. Collectively, the findings may help to further clarify the pathophysiology of ameloblastoma and lead to the development of precision medicine for patients with ameloblastoma.
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Affiliation(s)
- Sayuri Kondo
- Department of Oral and Maxillofacial Surgery, Aichi Medical University Hospital, Nagakute, Japan
| | - Akinobu Ota
- Department of Biochemistry, Aichi Medical University School of Medicine, Nagakute, Japan
| | - Takayuki Ono
- Department of Oral and Maxillofacial Surgery, Aichi Medical University Hospital, Nagakute, Japan
| | - Sivasundaram Karnan
- Department of Biochemistry, Aichi Medical University School of Medicine, Nagakute, Japan
| | - Md Wahiduzzaman
- Department of Biochemistry, Aichi Medical University School of Medicine, Nagakute, Japan
| | - Toshinori Hyodo
- Department of Biochemistry, Aichi Medical University School of Medicine, Nagakute, Japan
| | - Md Lutfur Rahman
- Department of Biochemistry, Aichi Medical University School of Medicine, Nagakute, Japan
| | - Kunihiro Ito
- Department of Oral and Maxillofacial Surgery, Aichi Medical University Hospital, Nagakute, Japan
| | - Akifumi Furuhashi
- Department of Oral and Maxillofacial Surgery, Aichi Medical University Hospital, Nagakute, Japan
| | - Tomio Hayashi
- Department of Oral and Maxillofacial Surgery, Aichi Medical University Hospital, Nagakute, Japan
| | - Hiroyuki Konishi
- Department of Biochemistry, Aichi Medical University School of Medicine, Nagakute, Japan
| | - Shinobu Tsuzuki
- Department of Biochemistry, Aichi Medical University School of Medicine, Nagakute, Japan
| | - Yoshitaka Hosokawa
- Department of Biochemistry, Aichi Medical University School of Medicine, Nagakute, Japan
| | - Yoshiaki Kazaoka
- Department of Oral and Maxillofacial Surgery, Aichi Medical University Hospital, Nagakute, Japan
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19
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Duarte-Andrade FF, Vitório JG, Pereira TDSF, Gomes CC, Gomez RS. A review of the molecular profile of benign and malignant odontogenic lesions. Oral Surg Oral Med Oral Pathol Oral Radiol 2020; 129:357-368. [PMID: 32035859 DOI: 10.1016/j.oooo.2019.12.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 12/27/2019] [Accepted: 12/29/2019] [Indexed: 12/16/2022]
Abstract
Odontogenic cysts and tumors are heterogeneous lesions, originating from elements or remnants of the odontogenic apparatus. Although the majority of these lesions are benign and never undergo malignant transformation, rare malignant tumors may arise de novo or from benign precursors. The molecular basis of these lesions is still poorly understood. This article summarizes and discusses studies using small, medium, and large-scale and/or "-omic" techniques to describe the molecular characteristics of benign and malignant odontogenic lesions and briefly debates strategies to increase the use of "-omic" and multi-omic approaches or integrative analyses in the research of these lesions. A comprehensive understanding of the molecular aspects of odontogenic lesions by using large-scale approaches will enable us to refine the classification of this heterogeneous group of disorders and provide more accurate biomarkers for precise diagnosis, prognosis, and development of molecular tools in the management of patients with these conditions.
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Affiliation(s)
- Filipe Fideles Duarte-Andrade
- Department of Oral Surgery and Pathology, School of Dentistry, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Jéssica Gardone Vitório
- Department of Oral Surgery and Pathology, School of Dentistry, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Thaís Dos Santos Fontes Pereira
- Department of Oral Surgery and Pathology, School of Dentistry, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Carolina Cavaliéri Gomes
- Department of Pathology, Biological Sciences Institute, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Ricardo Santiago Gomez
- Department of Oral Surgery and Pathology, School of Dentistry, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil.
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20
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Gupta R, Chaudhary M, Patil S, Fating C, Hande A, Suryawanshi H. Expression of p63 in tooth germ, dentigerous cyst and ameloblastoma. J Oral Maxillofac Pathol 2019; 23:43-48. [PMID: 31110415 PMCID: PMC6503805 DOI: 10.4103/jomfp.jomfp_125_18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Context: To assess the role of p63, a p53 homolog, in the cytodifferentiation (odontogenesis) and oncogenesis of odontogenic epithelium. Aim: The present study aimed to compare the expression pattern of p63 in the epithelium of tooth germ, dentigerous cyst (DC) and ameloblastoma (AB). Materials and Methods: Tissue specimens of thirty tooth germs, thirty ABs and thirty DCs were examined by immunohistochemistry for the expression of p63. Results: p63 labeling index (LI) was observed in descending order in epithelial cells of ABs, tooth germs and DCs. p63 LI was statistically nonsignificant among all the three groups. ABs revealed the highest p63 expression, but, surprisingly, tooth germs showed higher expression than DCs. Conclusion: p63 plays a role in the cytodifferentiation and proliferation of odontogenic epithelial cells irrespective of the tissue (normal developing or lesional tissue). This implies that p63 cannot be used as a diagnostic marker. However, our results indicate p63 overexpression as a mark of increased proliferation. Thus, it can be stipulated that p63 can be used as a prognostic marker in odontogenic lesions with more aggressive and invasive phenotype. Our results also suggest the differential function of p63 in both developing and lesional odontogenic tissues, which, however, depends on p63 isoform predominantly being expressed. Therefore, identification of p63-predominant isoform in a particular lesion is more important than the presence or absence of p63. Consequently, we suggest the performance of polymerase chain reaction analysis along with immunohistochemical evaluation in further studies.
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Affiliation(s)
- Rolly Gupta
- Department of Oral Pathology and Microbiology, Chhattisgarh Dental College and Research Institute, Rajnandgaon, Chhattisgarh, India
| | - Minal Chaudhary
- Department of Oral Pathology and Microbiology, Sharad Pawar Dental College, Wardha, Maharashtra, India
| | - Swati Patil
- Department of Oral Pathology and Microbiology, Sharad Pawar Dental College, Wardha, Maharashtra, India
| | - Chinar Fating
- Department of Oral Medicine and Radiology, Chhattisgarh Dental College and Research Institute, Rajnandgaon, Chhattisgarh, India
| | - Alka Hande
- Department of Oral Pathology and Microbiology, Sharad Pawar Dental College, Wardha, Maharashtra, India
| | - Hema Suryawanshi
- Department of Oral Pathology and Microbiology, Chhattisgarh Dental College and Research Institute, Rajnandgaon, Chhattisgarh, India
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21
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ARHGAP17 suppresses tumor progression and up-regulates P21 and P27 expression via inhibiting PI3K/AKT signaling pathway in cervical cancer. Gene 2019; 692:9-16. [DOI: 10.1016/j.gene.2019.01.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Revised: 12/29/2018] [Accepted: 01/02/2019] [Indexed: 11/21/2022]
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22
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Diniz MG, França JA, Vilas-Boas FA, de Souza FTA, Calin GA, Gomez RS, de Sousa SF, Gomes CC. The long noncoding RNA KIAA0125 is upregulated in ameloblastomas. Pathol Res Pract 2019; 215:466-469. [DOI: 10.1016/j.prp.2018.12.030] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 12/03/2018] [Accepted: 12/25/2018] [Indexed: 02/06/2023]
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23
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Genetic alteration of Exon 5 of the PTEN gene in Indian patients with ameloblastoma. Oral Surg Oral Med Oral Pathol Oral Radiol 2019; 127:225-230. [PMID: 30598407 DOI: 10.1016/j.oooo.2018.11.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Revised: 10/09/2018] [Accepted: 11/28/2018] [Indexed: 12/22/2022]
Abstract
OBJECTIVE The PI3K/Akt/mTOR pathway is one of the signaling pathways associated with the pathogenesis of ameloblastoma. The phosphatase and tensin (PTEN) homologue controls cell migration and proliferation. It monitors the level of Akt and maintains cellular integrity. The aim of the present study was to study the genetic alteration of Exon 5 of the PTEN gene in Indian patients with ameloblastoma. STUDY DESIGN Total DNA was extracted from formalin-fixed paraffin-embedded tissue samples from 20 cases with solid multicystic ameloblastoma (SMA) and from 10 cases with normal tooth germ. Exon 5 of the PTEN gene, was assessed for its role in the pathogenesis of ameloblastoma. RESULTS Five of 20 cases of SMA showed genetic alteration. Of these cases 3 (15%) showed silent mutation, 1 (5%) showed change in amino acid sequence from valine to glutamic acid, and 1 (5%) showed nonsense-mediated mRNA decay. CONCLUSIONS The present study showed 25% somatic mutational frequency in exonic region 5 of the PTEN gene. This may indicate its role in the pathogenesis of ameloblastoma.
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24
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VALESAN LF, MIGUEL AFP, RAMOS GDO, RIVERO ERC, DUTRA-HORSTMANN KL. Análise imuno-histoquímica de Ki-67 e α-SMA em ceratocisto odontogênico, ameloblastoma e folículo pericoronário. REVISTA DE ODONTOLOGIA DA UNESP 2019. [DOI: 10.1590/1807-2577.06719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Resumo Introdução Os ameloblastomas (AM) são considerados os tumores odontogênicos mais comuns da cavidade bucal, apresentando grande importância clínica devido à sua agressividade, capacidade infiltrativa e comportamento recorrente. De maneira semelhante, o ceratocisto odontogênico (CO) desperta a atenção por ter um comportamento agressivo e altas taxas de recorrência em relação aos outros cistos de desenvolvimento. Objetivo Avaliar e comparar o índice de proliferação epitelial e a presença de miofibroblastos em CO e AM, por meio dos anticorpos Ki-67 e α-SMA, respectivamente. Metodologia Foram selecionados 15 casos de AM e 24 casos de CO para investigação imuno-histoquímica das proteínas Ki-67 e α-SMA. Um grupo de sete folículos pericoronários (FP) foi incluído como controle de tecido odontogênico normal. A média de células positivas foi calculada para cada marcador. Resultado O teste de Kruskal-Wallis revelou que a expressão de ambos os marcadores foi maior nos casos de CO, quando comparada à expressão em AM e FP. Segundo o teste de Mann-Whitney, a expressão dos marcadores foi semelhante entre os subtipos de AM. Conclusão A alta expressão de Ki-67 e α-SMA observada em CO poderia estar associada ao comportamento agressivo desta lesão em relação aos outros cistos de desenvolvimento. Por outro lado, a expressão semelhante destas proteínas nos casos de AM e FP, assim como nos subtipos de AM, poderia indicar que outros fatores, além do potencial proliferativo, estariam associados ao comportamento clínico agressivo do AM.
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25
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Fernandes GS, Girardi DM, Bernardes JPG, Fonseca FP, Fregnani ER. Clinical benefit and radiological response with BRAF inhibitor in a patient with recurrent ameloblastoma harboring V600E mutation. BMC Cancer 2018; 18:887. [PMID: 30208863 PMCID: PMC6134697 DOI: 10.1186/s12885-018-4802-y] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 09/05/2018] [Indexed: 12/18/2022] Open
Abstract
Background Ameloblastoma is a slow-growing neoplasm of the jaw, for which the standard treatment is surgical removal of the lesion with high recurrence rates and elevated morbidity. Systemic therapy is not established in the literature. Case presentation We present a case of a 29-year-old woman diagnosed with an ameloblastoma of the left mandible who had been subjected to several surgical procedures over twenty years due to multiple local recurrences. Molecular testing revealed a BRAF V600E mutation, and vemurafenib was started. She experienced complete resolution of symptoms related to the disease, and image scans evidenced continuous shrinkage of the neoplastic lesion after eleven months of therapy. Conclusion This is the first report showing clinical benefit and radiological response with vemrafenib for recurrent ameloblastoma. Targeted therapy addressing BRAF V600E mutation has the potential to change clinical practice of this rare disease.
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Affiliation(s)
- Gustavo S Fernandes
- Department of Oncology, Hospital Sírio Libanês, SGAS 613, conjunto E lote 95, Asa Sul, Brasília, DF, 70200-001, Brazil.
| | - Daniel M Girardi
- Department of Oncology, Hospital Sírio Libanês, SGAS 613, conjunto E lote 95, Asa Sul, Brasília, DF, 70200-001, Brazil
| | | | - Felipe P Fonseca
- Department of Oral Surgery and Pathology, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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26
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Davanian H, Balasiddaiah A, Heymann R, Sundström M, Redenström P, Silfverberg M, Brodin D, Sällberg M, Lindskog S, Kruger Weiner C, Chen M. Ameloblastoma RNA profiling uncovers a distinct non-coding RNA signature. Oncotarget 2018; 8:4530-4542. [PMID: 27965463 PMCID: PMC5354851 DOI: 10.18632/oncotarget.13889] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Accepted: 11/30/2016] [Indexed: 12/28/2022] Open
Abstract
Ameloblastoma of the jaws remains the top difficult to treat odontogenic tumour and has a high recurrence rate. New evidence suggests that non-coding RNAs (ncRNAs) play a critical role in tumourgenesis and prognosis of cancer. However, ameloblastoma ncRNA expression data is lacking. Here we present the first report of ameloblastoma ncRNA signatures. A total of 95 ameloblastoma cases and a global array transcriptome technology covering > 285.000 full-length transcripts were used in this two-step analysis. The analysis first identified in a test cohort 31 upregulated ameloblastoma-associated ncRNAs accompanied by signalling pathways of cancer, spliceosome, mRNA surveillance and Wnt. Further validation in an independent cohort points out the long non-coding (lncRNAs) and small nucleolar RNA (snoRNAs): LINC340, SNORD116-25, SNORA11, SNORA21, SNORA47 and SNORA65 as a distinct ncRNA signature of ameloblastoma. Importantly, the presence of these ncRNAs was independent of BRAF-V600E and SMO-L412F mutations, histology type or tumour location, but was positively correlated with the tumour size. Taken together, this study shows a systematic investigation of ncRNA expression of ameloblastoma, and illuminates new diagnostic and therapeutic targets for this invasive odontogenic tumour.
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Affiliation(s)
- Haleh Davanian
- Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden
| | - Anangi Balasiddaiah
- Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden.,Department of Laboratory Medicine, Karolinska Institutet, Huddinge, Sweden
| | - Robert Heymann
- Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden.,The Clinic of Oral and Maxillofacial Surgery, Karolinska University Hospital, Huddinge, Sweden
| | - Magnus Sundström
- Rudbeck Laboratory, Molecular Pathology Unit, Department of Pathology, Uppsala University Hospital and Department of Immunology, Genetics and Pathology, Uppsala University, Sweden
| | - Poppy Redenström
- Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden
| | | | - David Brodin
- Department of Biosciences and Nutrition, Bioinformatics and Expression Analysis SciLifeLab, Karolinska Institutet, Huddinge, Sweden
| | - Matti Sällberg
- Department of Laboratory Medicine, Karolinska Institutet, Huddinge, Sweden
| | - Sven Lindskog
- Department of Oncology and Pathology, Karolinska Institutet, Huddinge, Sweden.,Clinical Pathology and Cytology, Karolinska University Hospital, Karolinska University Hospital, Solna, Sweden
| | - Carina Kruger Weiner
- Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden.,The Clinic of Oral and Maxillofacial Surgery, Karolinska University Hospital, Huddinge, Sweden
| | - Margaret Chen
- Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden.,Department of Laboratory Medicine, Karolinska Institutet, Huddinge, Sweden
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27
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Carreón-Burciaga RG, González-González R, Molina-Frechero N, López-Verdín S, Pereira-Prado V, Bologna-Molina R. Differences in E-Cadherin and Syndecan-1 Expression in Different Types of Ameloblastomas. Anal Cell Pathol (Amst) 2018; 2018:9392632. [PMID: 29850393 PMCID: PMC5937611 DOI: 10.1155/2018/9392632] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Revised: 03/08/2018] [Accepted: 03/14/2018] [Indexed: 02/07/2023] Open
Abstract
Ameloblastomas are a group of benign, locally aggressive, recurrent tumors characterized by their slow and infiltrative growth. E-Cadherin and syndecan-1 are cell adhesion molecules related to the behavior of various tumors, including ameloblastomas. Ninety-nine ameloblastoma samples were studied; the expression of E-cadherin and syndecan-1 were evaluated by immunohistochemistry. E-Cadherin and epithelial syndecan-1 were more highly expressed in intraluminal/luminal unicystic ameloblastoma than in mural unicystic ameloblastoma and solid/multicystic ameloblastoma, whereas the stromal expression of syndecan-1 was higher in mural unicystic ameloblastoma and solid/multicystic ameloblastoma. Synchronicity was observed between E-cadherin and epithelial syndecan-1; the expression was correlated with intensity in all cases. There was a strong association between expression and tumor size and recurrence. The evaluation of the expression of E-cadherin and syndecan-1 are important for determining the potential aggressiveness of ameloblastoma variants. Future studies are required to understand how the expression of these markers is related to tumor aggressiveness.
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Affiliation(s)
- Ramón G. Carreón-Burciaga
- 1Department of Research, School of Dentistry, Juarez University of the State of Durango, Durango, DGO, Mexico
| | - Rogelio González-González
- 1Department of Research, School of Dentistry, Juarez University of the State of Durango, Durango, DGO, Mexico
| | - Nelly Molina-Frechero
- 2Department of Health Care, Xochimilco Unit, Autonomous Metropolitan University, Mexico City, Mexico
| | - Sandra López-Verdín
- 3Research Institute of Dentistry, Health Science Center, Guadalajara University, Guadalajara, JAL, Mexico
| | - Vanesa Pereira-Prado
- 4Molecular Pathology Area, School of Dentistry, University of the Republic, Montevideo, Uruguay
| | - Ronell Bologna-Molina
- 4Molecular Pathology Area, School of Dentistry, University of the Republic, Montevideo, Uruguay
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28
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Soltani M, Tabatabaiefar MA, Mohsenifar Z, Pourreza MR, Moridnia A, Shariati L, Razavi SM. Genetic study of the BRAF gene reveals new variants and high frequency of the V600E mutation among Iranian ameloblastoma patients. J Oral Pathol Med 2017. [PMID: 28650588 DOI: 10.1111/jop.12610] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
BACKGROUND Ameloblastoma is a benign, slow-growing and locally invasive tumor. It is one of the most prevalent odontogenic tumors, with an incidence rate of 1% of all oral tumors and approximately 18% of odontogenic tumors. A group of genes have been investigated in patients with ameloblastoma. The BRAF V600E mutation has been implicated as the most common mutation in ameloblastoma. The presence or absence of this mutation has been associated with several clinicopathological properties, including location, age at diagnosis, histology, and prognosis. Although some populations have been investigated so far, little data are available on the Iranian population. The current research was launched to study the BRAF V600E mutation among a cohort of Iranian patients with ameloblastoma. METHODS In this clinicopathological and molecular biology study, a total of 19 formalin-fixed, paraffin-embedded tissues were studied. DNA extraction was performed, followed by PCR-sequencing of exons 10 and 15 of the BRAF gene to identify mutations. In silico analysis was performed for the identified variants. Results were analyzed by T test, Chi-square, and Fisher's exact test. RESULTS Totally, 12 of 19 samples (63%) harbored the p. V600E hotspot mutation. In addition, we identified several variants, two of which were novel. The c.1769T>G (p. V590G) and c.1751C>T (p.L584F) as the novel variants showed a possible damaging effect by in silico analysis. No variant was found within exon 10. CONCLUSIONS Our study confirms the role of BRAF mutations in ameloblastoma in the Iranian patients studied.
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Affiliation(s)
- Maryam Soltani
- Department of Oral and Maxillofacial Pathology, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mohammad Amin Tabatabaiefar
- Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.,Pediatric Inherited Diseases Research Center, Research Institute for Primordial Prevention of Noncommunicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Zhaleh Mohsenifar
- Department of General Pathology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Reza Pourreza
- Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Abbas Moridnia
- Department of Immunology, Dezful University of Medical Sciences, Dezful, Iran
| | - Laleh Shariati
- Isfahan Cardiovascular Research Center, Cardiovascular Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Seyyed Mohammad Razavi
- Department of Oral and Maxillofacial Pathology, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran.,Dental Implant Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
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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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Effiom OA, Ogundana OM, Akinshipo AO, Akintoye SO. Ameloblastoma: current etiopathological concepts and management. Oral Dis 2017; 24:307-316. [PMID: 28142213 DOI: 10.1111/odi.12646] [Citation(s) in RCA: 131] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Accepted: 01/20/2017] [Indexed: 02/06/2023]
Abstract
Ameloblastoma is a benign odontogenic tumor of epithelial origin. It is locally aggressive with unlimited growth capacity and has a high potential for malignant transformation as well as metastasis. Ameloblastoma has no established preventive measures although majority of patients are between ages 30 and 60 years. Molecular and genetic factors that promote oncogenic transformation of odontogenic epithelium to ameloblastoma are strongly linked to dysregulation of multiple genes associated with mitogen-activated protein kinase, sonic hedgehog, and WNT/β-catenin signaling pathways. Treatment of ameloblastoma is focused on surgical resection with a wide margin of normal tissue because of its high propensity for locoregional invasion; but this is often associated with significant patient morbidity. The relatively high recurrence rate of ameloblastoma is influenced by the type of molecular etiological factors, the management approach, and how early the patient presents for treatment. It is expected that further elucidation of molecular factors that orchestrate pathogenesis and recurrence of ameloblastoma will lead to new diagnostic markers and targeted drug therapies for ameloblastoma.
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Affiliation(s)
- O A Effiom
- Department of Oral and Maxillofacial Pathology/Biology, Faculty of Dental Sciences, University of Lagos, Lagos, Nigeria
| | - O M Ogundana
- Department of Oral and Maxillofacial Pathology/Biology, Faculty of Dental Sciences, University of Lagos, Lagos, Nigeria
| | - A O Akinshipo
- Department of Oral and Maxillofacial Pathology/Biology, Faculty of Dental Sciences, University of Lagos, Lagos, Nigeria
| | - S O Akintoye
- Department of Oral Medicine, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
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Wright JM, Vered M. Update from the 4th Edition of the World Health Organization Classification of Head and Neck Tumours: Odontogenic and Maxillofacial Bone Tumors. Head Neck Pathol 2017; 11:68-77. [PMID: 28247226 PMCID: PMC5340735 DOI: 10.1007/s12105-017-0794-1] [Citation(s) in RCA: 339] [Impact Index Per Article: 48.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Accepted: 02/02/2017] [Indexed: 12/23/2022]
Abstract
The 4th edition of the World Health Organization's Classification of Head and Neck Tumours was published in January of 2017. This article provides a summary of the changes to Chapter 4 Tumours of the oral cavity and mobile tongue and Chapter 8 Odontogenic and maxillofacial bone tumours. Odontogenic cysts which were eliminated from the 3rd 2005 edition were included in the 4th edition as well as other unique allied conditons of the jaws. Many new tumors published since 2005 have been included in the 2017 classification.
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Affiliation(s)
- John M. Wright
- Department of Diagnostic Sciences, Texas A&M University, School of Dentistry, 3302 Gaston Ave, Dallas, TX 75246 USA
| | - Marilena Vered
- Department of Oral Pathology and Oral Medicine, School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel ,Institute of Pathology, Chaim Sheba Medical Center, Tel Hashomer, Ramat Gan, Israel
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Heikinheimo K, Jee KJ, Morgan PR, Nagy B, Knuutila S, Leivo I. Genetic Changes in Sporadic Keratocystic Odontogenic Tumors (Odontogenic Keratocysts). J Dent Res 2016; 86:544-9. [PMID: 17525355 DOI: 10.1177/154405910708600611] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Little is known about the genetic background of keratocystic odontogenic tumors (KCOT, odontogenic keratocysts). Our aim was to characterize genomic aberrations in sporadic KCOT using cDNA-expression arrays and array-comparative genomic hybridization. For cDNA-expression arrays, 10 KCOT specimens and 20 fetal tooth germs were studied. Quantitative real-time reverse-transcription/polymerase chain-reaction and immunohistochemical studies were also undertaken. Several genes were over-expressed in 12q13, including cytokeratin 6B ( KRT6B) (≈ 10-fold), epidermal growth factor receptor ERBB3 (~ 4.7-fold), and glioma-associated oncogene homologue 1 ( GLI1) (~ 5- to 12-fold). One amplicon (~ 0.7 Mega base pairs [Mbp]), covering several genes involved in the regulation of cell growth, was found in 12q13.2. Deletions were found in 3q13.1, 5p14.3, and 7q31.3, including the cell-adhesion-related gene cadherin 18 ( CDH18) and leukocyte cell adhesion molecule ( ALCAM, MEMD). Over-expressed and amplified genes in 12q13, also reported in several other tumors and cell lines, may contribute to the persistent growth characteristics of KCOT.
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Affiliation(s)
- K Heikinheimo
- Department of Oral and Maxillofacial Surgery, Institute of Dentistry, University of Turku, Lemminkäisenkatu 2, FIN-20520 Turku, Finland.
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Ganvir SM, Khobragade PG, Bamane SA, Kumavat R, Dalmia A. Role of podoplanin expression in deciding the invasive potential of ameloblastoma - A retrospective IHC study. J Oral Biol Craniofac Res 2016; 6:187-193. [PMID: 27761382 PMCID: PMC5065002 DOI: 10.1016/j.jobcr.2016.07.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Accepted: 07/05/2016] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND The aim of this study was to investigate the podoplanin expression in epithelial odontogenic tumors both non-aggressive and aggressive, tumors with and without ectomesenchyme and remnants of the odontogenic epithelium from dental follicles (DF) of unerupted teeth and to examine its role in progression and invasion of tumors. METHOD Thirty paraffin embedded specimens AM (15 were non-aggressive ameloblastomas and 15 ameloblastoma showing aggressive behavior), 15 paraffin embedded specimens of AOT, 15 paraffin embedded specimens of CEOT, 15 paraffin embedded specimens of CCOT were obtained and were analyzed by immunohistochemistry using anti-human podoplanin. Podoplanin expression in odontogenic epithelial cells was evaluated using a scoring method, along with calculation of the percentage of positive odontogenic cells. RESULTS Podoplanin was expressed strongly at the invasive front (in the peripheral odontogenic epithelial cells) of most tumors and dental follicles. Membranous expression of podoplanin in ameloblastomas was stronger in cases of ameloblastomas showing aggressive behavior than (NA) non-aggressive ameloblastomas. CONCLUSION Expression of podoplanin at the invasive front (in peripheral cells) of odontogenic tumors considered to be associated with neoplastic odontogenic tissues. This molecule might play a role in progression and local invasion of odontogenic tumors. The migration and invasion mediated by podoplanin in odontogenic tumors could be related to cytoskeletal reorganization.
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Affiliation(s)
| | - Pratima G. Khobragade
- Department of Oral Pathology and Microbiology, Government Dental College and Hospital, Nagpur, India
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Hu S, Parker J, Divaris K, Padilla R, Murrah V, Wright JT. Ameloblastoma Phenotypes Reflected in Distinct Transcriptome Profiles. Sci Rep 2016; 6:30867. [PMID: 27491308 PMCID: PMC4974613 DOI: 10.1038/srep30867] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Accepted: 07/08/2016] [Indexed: 02/04/2023] Open
Abstract
Ameloblastoma is a locally invasive benign neoplasm derived from odontogenic epithelium and presents with diverse phenotypes yet to be characterized molecularly. High recurrence rates of 50–80% with conservative treatment in some sub-types warrants radical surgical resections resulting in high morbidity. The objective of the study was to characterize the transcriptome of ameloblastoma and identify relevant genes and molecular pathways using normal odontogenic tissue (human “dentome”) for comparison. Laser capture microdissection was used to obtain neoplastic epithelial tissue from 17 tumors which were examined using the Agilent 44 k whole genome microarray. Ameloblastoma separated into 2 distinct molecular clusters that were associated with pre-secretory ameloblast and odontoblast. Within the pre-secretory cluster, 9/10 of samples were of the follicular type while 6/7 of the samples in the odontoblast cluster were of the plexiform type (p < 0.05). Common pathways altered in both clusters included cell-cycle regulation, inflammatory and MAPkinase pathways, specifically known cancer-driving genes such as TP53 and members of the MAPkinase pathways. The pre-secretory ameloblast cluster exhibited higher activation of inflammatory pathways while the odontoblast cluster showed greater disturbances in transcription regulators. Our results are suggestive of underlying inter-tumor molecular heterogeneity of ameloblastoma sub-types and have implications for the use of tailored treatment.
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Affiliation(s)
- Shijia Hu
- Pediatric Dentistry, School of Dentistry, University of North Carolina-Chapel Hill, Chapel Hill, NC, USA.,Faculty of Dentistry, National University of Singapore, Singapore
| | - Joel Parker
- Cancer Genetics, University of North Carolina-Chapel Hill, Chapel Hill, NC, USA
| | - Kimon Divaris
- Pediatric Dentistry, School of Dentistry, University of North Carolina-Chapel Hill, Chapel Hill, NC, USA.,Epidemiology, Gillings School of Global Public Health, University of North Carolina-Chapel Hill, Chapel Hill, NC, USA
| | - Ricardo Padilla
- Diagnostic Sciences, School of Dentistry, University of North Carolina-Chapel Hill, Chapel Hill, NC, USA
| | - Valerie Murrah
- Diagnostic Sciences, School of Dentistry, University of North Carolina-Chapel Hill, Chapel Hill, NC, USA
| | - John Timothy Wright
- Pediatric Dentistry, School of Dentistry, University of North Carolina-Chapel Hill, Chapel Hill, NC, USA
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Abstract
Several molecular pathways have been shown to play critical roles in the pathogenesis of odontogenic tumors. These neoplasms arise from the epithelial or mesenchymal cells of the dental apparatus in the jaw or oral mucosa. Next generation genomic sequencing has identified gene mutations or single nucleotide polymorphisms associated with many of these tumors. In this review, we focus on two of the most common odontogenic tumor subtypes: ameloblastoma and keratocystic odontogenic tumors. We highlight gene expression and protein immunohistological findings and known genetic alterations in the hedgehog, BRAF/Ras/MAPK, epidermal growth factor receptor, Wnt and Akt signaling pathways relevant to these tumors. These various pathways are explored to potentially target odontogenic tumors cells and prevent growth and recurrence of disease. Through an understanding of these signaling pathways and their crosstalk, molecular diagnostics may emerge as well as the ability to exploit identified molecular differences to develop novel molecular therapeutics for the treatment of odontogenic tumors.
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García-Muñoz A, Bologna-Molina R, A. Rodríguez M, Liceága-Reyes R, Farfán-Morales JE, Aranda-Romo S, Molina-Frechero N, González-González R. Orosomucoid-1 Expression in Ameloblastoma Variants. INTERNATIONAL JOURNAL OF MOLECULAR AND CELLULAR MEDICINE 2016; 5:49-56. [PMID: 27386438 PMCID: PMC4916783 DOI: pmid/27386438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Odontogenic tumors constitute a group of heterogeneous lesions of benign and malignant neoplasms with variable aggressiveness. Ameloblastomas are a group of benign but locally invasive neoplasms that occur in the jaws and are derived from epithelial elements of the tooth-forming apparatus. We previously described orosomucoid-1 protein expression in odontogenic myxomas. However, whether orosomucoid-1 is expressed in other odontogenic tumors remains unknown. Since orosomucoid-1 belongs to a group of acute-phase proteins and has many functions in health and disease, we identified and analyzed orosomucoid-1 expression in ameloblastoma variants and ameloblastic carcinoma using western blot and immunohistochemical techniques. Thirty cases of ameloblastoma were analyzed for orsomucoid-1; five specimens were fresh for western blot study (four benign ameloblastomas and one ameloblastic carcinoma), and 25 cases of benign ameloblastoma for immunohistochemical assays. Orosomucoid-1 was widely expressed in each tumor variant analyzed in this study, and differential orosomucoid-1 expression was observed between benign and malignant tumor. Orosomucoid-1 may play an important role in the behavior of ameloblastomas and influence the biology and development of the variants of this tumor.
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Affiliation(s)
- Alejandro García-Muñoz
- Laboratorio de Investigación en Odontología, ALMARAZ/UBIMED, FES Iztacala, UNAM. State of Mexico, Mexico.
| | | | - Mario A. Rodríguez
- Department of Infectomics and Molecular Pathogenesis, CINVESTAV-IPN, México, D.F, México.
| | | | | | - Saray Aranda-Romo
- Biochemistry, Microbiology and Pathology Laboratory, Faculty of Stomatology, Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico.
| | - Nelly Molina-Frechero
- Health Care Department, Universidad Autónoma Metropolitana, Xochimilco, UAM, México City, Mexico.
| | - Rogelio González-González
- Department Research, School of Dentistry, Universidad Juárez del Estado de Durango, México.
- Corresponding author: Rogelio González-González. Facultad de Odontología, Universidad Juárez del Estado de Durango. Predio Canoas S/n, Col Los Angeles, Durango. E-mail:
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Mishra P, Panda A, Bandyopadhyay A, Kumar H, Mohiddin G. Sonic Hedgehog Signalling Pathway and Ameloblastoma - A Review. J Clin Diagn Res 2015; 9:ZE10-3. [PMID: 26674664 DOI: 10.7860/jcdr/2015/15443.6750] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Accepted: 10/06/2015] [Indexed: 01/06/2023]
Abstract
Ameloblastoma is a benign but aggressive odontogenic neoplasm arising from odontogenic epithelium. Many theories have been proposed to explain the pathogenesis of ameloblatoma. Numerous signalling pathways have been implicated to be associated in the development and progression of this neoplasm. Studies have found association of various signalling molecules of Sonic Hedgehog Pathway, namely SHH, PTCH1, SMO, Gli 1, Gli 2, Gli 3, with ameloblastoma. Knowledge about this pathway will help us to understand the nature and behaviour of this neoplasm. This will open the door towards new treatment modalities.
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Affiliation(s)
- Pallavi Mishra
- Postgraduate Trainee, Department of Oral and Maxillofacial Pathology, Kalinga Institute of Dental sciences, KIIT , Bhubaneswar, Odisha, India
| | - Abikshyeet Panda
- Reader, Department of Oral and Maxillofacial Pathology, Kalinga Institute of Dental Sciences, KIIT , Bhubaneswar, Odisha. India
| | - Alokenath Bandyopadhyay
- Professor and Head of the Department, Department of Oral and Maxillofacial Pathology, Kalinga Institute of Dental Sciences, KIIT , Bhubaneswar. Odisha. India
| | - Harish Kumar
- Professor, Department of Oral and Maxillofacial Pathology, Kalinga Institute of Dental Sciences, KIIT , Bhubaneswar, Odisha, India
| | - Gouse Mohiddin
- Reader, Department of Oral and Maxillofacial Pathology, Kalinga Institute of Dental Sciences, KIIT , Bhubaneswar, Odisha, India
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Immunohistochemical expression of CD56 in dog (Canis familiaris) odontogenesis. Arch Oral Biol 2015; 60:1577-80. [PMID: 26276269 DOI: 10.1016/j.archoralbio.2015.08.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Revised: 07/30/2015] [Accepted: 08/02/2015] [Indexed: 01/13/2023]
Abstract
AIM To investigate the expression of CD56 in dog odontogenesis in order to elucidate the expression found in ameloblastomas. MATERIALS AND METHODS Immunohistochemical analysis of CD56 expression of developing dog teeth in the bud, cap and bell stages including the remnants of the dental lamina. RESULTS Weak CD56 expression was observed in the dental epithelium during the bud stage with intense staining of certain peripheral epithelial cells. Positive staining of epithelial cells was also observed in the cap stage with intense staining of the inner enamel epithelium at this stage. During the bell stage the staining was concentrated on the cervical loop areas. The dental papilla revealed positive staining throughout the cap and bell stages while the dental follicle stained intensely positive throughout all the phases examined. The dental lamina and Serres rests also stained positive for CD56. CONCLUSIONS The expression of CD56 in dog odontogenic tissue varies according to the stage of tooth development. There is a positive correlation between the positive staining observed in ameloblastomas and their odontogenic cells of origin.
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A discussion of some advancements and some persistent difficulties in the recognition and understanding of the histopathologic and molecular features of selected odontogenic tumors and tumor-like malformations. Adv Anat Pathol 2015; 22:213-6. [PMID: 25844679 DOI: 10.1097/pap.0000000000000063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Overgrowths of epithelial, ectomesenchymal, and/or mesenchymal elements of the tooth-forming apparatus are quite variable with respect to their histopathologic characteristics and biological behaviors. Investigations of a variety of odontogenic lesions have led to an enhanced comprehension of many salient diagnostic features. This discussion provides an update with respect to the understanding of odontogenic tumors and tumor-like malformations and attempts to assist pathologists in the recognition and classification of these lesions.
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Ameloblastoma: a clinical review and trends in management. Eur Arch Otorhinolaryngol 2015; 273:1649-61. [DOI: 10.1007/s00405-015-3631-8] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Accepted: 04/15/2015] [Indexed: 12/22/2022]
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Towards unraveling the human tooth transcriptome: the dentome. PLoS One 2015; 10:e0124801. [PMID: 25849153 PMCID: PMC4388651 DOI: 10.1371/journal.pone.0124801] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Accepted: 03/18/2015] [Indexed: 01/03/2023] Open
Abstract
The goal of the study was to characterize the transcriptome profiles of human ameloblasts and odontoblasts, evaluate molecular pathways and advance our knowledge of the human "dentome". Laser capture microdissection was used to isolate odontoblasts and ameloblasts from human tooth buds (15-20week gestational age) from 4 fetuses. RNA was examined using Agilent 41k whole genome arrays at 2 different stages of enamel formation, presecretory and secretory. Probe detection was considered against the array negative control to control for background noise. Differential expression was examined using Significance Analysis of Microarrays (SAM) 4.0 between different cell types and developmental stages with a false discovery rate of 20%. Pathway analysis was conducted using Ingenuity Pathway Analysis software. We found that during primary tooth formation, odontoblasts expressed 14,802 genes, presecretory ameloblasts 15,179 genes and secretory ameloblasts 14,526 genes. Genes known to be active during tooth development for each cell type (eg COL1A1, AMELX) were shown to be expressed by our approach. Exploring further into the list of differentially expressed genes between the motile odontoblasts and non-motile presecretory ameloblasts we found several genes of interest that could be involved in cell movement (FN1, LUM, ASTN1). Furthermore, our analysis indicated that the Phospholipase C and ERK5 pathways, that are important for cell movement, were activated in the motile odontoblasts. In addition our pathway analysis identified WNT3A and TGFB1 as important upstream contributors. Recent studies implicate these genes in the development of Schimke immuno-osseous dysplasia. The utility of laser capture microdissection can be a valuable tool in the examination of specific tissues or cell populations present in human tooth buds. Advancing our knowledge of the human dentome and related molecular pathways provides new insights into the complex mechanisms regulating odontogenesis and biomineralization. This knowledge could prove useful in future studies of odontogenic related pathologies.
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Udeabor SE, Adisa AO, Lawal AO, Barbeck M, Booms P, Sader RA, Ghanaati S. PTCH-1 and MDM2 expression in ameloblastoma from a West African sub-population: implication for chemotherapeutics. Pan Afr Med J 2015; 20:140. [PMID: 27386018 PMCID: PMC4919700 DOI: 10.11604/pamj.2015.20.140.5869] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Accepted: 02/08/2015] [Indexed: 11/25/2022] Open
Abstract
Introduction Ameloblastoma is a slow growing, painless odontogenic swelling which can attain sizes that result in severe deformities of the craniofacial complex. It is the most commonly encountered odontogenic tumor in Nigeria. Surgical intervention is currently the method of treatment; however identification of altered molecular pathways may inform chemotherapeutic potential. The Protein Patched homolog 1 (PTCH-1) is overexpressed in ameloblastoma. Also, mutation in the MDM2 gene can reduce the tumor suppressor function of p53 and promote ameloblastoma growth. No study however has characterized the molecular profile of African cases of ameloblastoma with a view to developing chemotherapeutic alternatives. The objective was to characterize the PTCH-1 genetic profile of Ameloblastoma in Nigerian patients as a first step in investigating its potential for chemotherapeutic intervention. Methods Twenty-eight FFPE blocks of ameloblastoma cases from Nigerian patients were prepared for antibody processing to PTCH-1 (Polyclonal Anti-PTCH antibody ab39266) and MDM2 (Monoclonal Anti-MDM2 antibody (2A10) ab16895). Cytoplasmic brown staining was considered as positive for PTCH while nuclear staining was positive for MDM2. Results Moderate and strong expressions for PTCH in ameloblast and stellate reticulum were 78.6% and 60.7% respectively. Only 3 (10.7%) cases expressed MDM2. Conclusion The importance of our study is that it supports, in theory, anti-PTCH/SHH chemotherapeutics for Nigerian ameloblastoma cases and also infers the possible additional use of anti-p53 agents.
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Affiliation(s)
- Samuel Ebele Udeabor
- Department of Oral and Maxillofacial Surgery, College of Health Sciences, University of Port Harcourt, Nigeria
| | | | | | - Mike Barbeck
- Department for Oral, Cranio-Maxillofacial and Facial Plastic Surgery, Medical Center of the Goethe University Frankfurt, Frankfurt am Main, Germany; REPAIR-Lab, Institute of Pathology, University Medical Center, Johannes Gutenberg University, Mainz, Germany
| | - Patrick Booms
- Department for Oral, Cranio-Maxillofacial and Facial Plastic Surgery, Medical Center of the Goethe University Frankfurt, Frankfurt am Main, Germany; REPAIR-Lab, Institute of Pathology, University Medical Center, Johannes Gutenberg University, Mainz, Germany
| | - Robert Alexander Sader
- Department for Oral, Cranio-Maxillofacial and Facial Plastic Surgery, Medical Center of the Goethe University Frankfurt, Frankfurt am Main, Germany
| | - Shahram Ghanaati
- Department for Oral, Cranio-Maxillofacial and Facial Plastic Surgery, Medical Center of the Goethe University Frankfurt, Frankfurt am Main, Germany; REPAIR-Lab, Institute of Pathology, University Medical Center, Johannes Gutenberg University, Mainz, Germany
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Heikinheimo K, Kurppa KJ, Laiho A, Peltonen S, Berdal A, Bouattour A, Ruhin B, Catón J, Thesleff I, Leivo I, Morgan PR. Early dental epithelial transcription factors distinguish ameloblastoma from keratocystic odontogenic tumor. J Dent Res 2015; 94:101-11. [PMID: 25398365 DOI: 10.1177/0022034514556815] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2023] Open
Abstract
The aim of the study was to characterize the molecular relationship between ameloblastoma and keratocystic odontogenic tumor (KCOT) by means of a genome-wide expression analysis. Total RNA from 27 fresh tumor samples of 15 solid/multicystic intraosseous ameloblastomas and 12 sporadic KCOTs was hybridized on Affymetrix whole genome arrays. Hierarchical clustering separated ameloblastomas and KCOTs into 2 distinct groups. The gene set enrichment analysis based on 303 dental genes showed a similar separation of ameloblastomas and KCOTs. Early dental epithelial markers PITX2, MSX2, DLX2, RUNX1, and ISL1 were differentially overexpressed in ameloblastoma, indicating its dental identity. Also, PTHLH, a hormone involved in tooth eruption and invasive growth, was one of the most differentially upregulated genes in ameloblastoma. The most differentially overexpressed genes in KCOT were squamous epithelial differentiation markers SPRR1A, KRTDAP, and KRT4, as well as DSG1, a component of desmosomal cell-cell junctions. Additonally, the epithelial stem cell marker SOX2 was significantly upregulated in KCOT when compared with ameloblastoma. Taken together, the gene expression profile of ameloblastoma reflects differentiation from dental lamina toward the cap/bell stage of tooth development, as indicated by dental epithelium-specific transcription factors. In contrast, gene expression of KCOT indicates differentiation toward keratinocytes.
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Affiliation(s)
- K Heikinheimo
- Department of Oral and Maxillofacial Surgery, Institute of Dentistry, University of Turku, Turku, Finland Turku University Hospital, Turku, Finland Department of Oral Diagnostic Sciences, Institute of Dentistry, University of Eastern Finland, Kuopio, Finland Department of Oral and Maxillofacial Diseases, Kuopio University Hospital, Kuopio, Finland
| | - K J Kurppa
- Department of Medical Biochemistry and Genetics, University of Turku, Turku, Finland Turku Doctoral Programme of Molecular Medicine, Turku, Finland
| | - A Laiho
- Microarray and Sequencing Centre, Turku Centre for Biotechnology, University of Turku, Turku, Finland Åbo Akademi University, Turku, Finland
| | - S Peltonen
- Turku University Hospital, Turku, Finland Department of Dermatology, University of Turku, Turku, Finland
| | - A Berdal
- Molecular Oral Pathophysiology, INSERM UMRS 872, Cordeliers Biomedical Institute, Paris 7 University, Paris, France
| | - A Bouattour
- Department of Maxillofacial Surgery and Stomatology, André Grégoire Hospital, Paris, France
| | - B Ruhin
- Molecular Oral Pathophysiology, INSERM UMRS 872, Cordeliers Biomedical Institute, Paris 7 University, Paris, France Assistance Publique-Hôpitaux de Paris, Pitié-Salpêtrière Hospital, Department of Maxillofacial Surgery and Stomatology, Paris, France
| | - J Catón
- Head and Neck/Oral Pathology, Dental Institute, King's College London, London, UK
| | - I Thesleff
- Institute of Biotechnology, University of Helsinki, Helsinki, Finland
| | - I Leivo
- Turku University Hospital, Turku, Finland Department of Pathology, University of Turku, Turku, Finland
| | - P R Morgan
- Head and Neck/Oral Pathology, Dental Institute, King's College London, London, UK
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Cabay RJ. An overview of molecular and genetic alterations in selected benign odontogenic disorders. Arch Pathol Lab Med 2014; 138:754-8. [PMID: 24878015 DOI: 10.5858/arpa.2013-0057-sa] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
CONTEXT Some dental abnormalities have environmental causes. Other odontogenic alterations are idiopathic and may have hereditary etiologies. Investigations of these conditions are ongoing. OBJECTIVE To provide a discussion of developmental odontogenic abnormalities and benign odontogenic overgrowths and neoplasms for which genetic alterations have been well demonstrated and well documented. DATA SOURCES Relevant peer-reviewed literature. CONCLUSIONS The understanding of benign odontogenic lesions at a molecular level is rather well developed for some lesions and at the initial stages for many others. Further characterization of the molecular underpinnings of these and other odontogenic lesions would result in an enhanced comprehension of odontogenesis and the pathogenesis of a variety of odontogenic aberrations. These advancements may lead to better prevention and treatment paradigms and improved patient outcomes.
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Affiliation(s)
- Robert J Cabay
- From the Department of Pathology, College of Medicine, and the Department of Oral Medicine and Diagnostic Sciences, College of Dentistry, University of Illinois Hospital & Health Sciences System, Chicago, Illinois
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45
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Ivanišević Malčić A, Breen L, Josić D, Jukić Krmek S, Džombeta T, Matijević J, Grgurević L, Pavelić K, Krušlin B, Kraljević Pavelić S. Proteomics profiling of keratocystic odontogenic tumours reveals AIDA as novel biomarker candidate. J Oral Pathol Med 2014; 44:367-77. [PMID: 25040847 DOI: 10.1111/jop.12239] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/17/2014] [Indexed: 12/11/2022]
Abstract
BACKGROUND Keratocystic odontogenic tumour (KCOT) is a benign, yet aggressive odontogenic tumour. Herein, proteome analysis of KCOT lesions in comparison with control patient-matched tissue unaffected by the disease and with inflammatory odontogenic cysts, namely radicular cysts is presented. METHODS For the proteomics profiling, two complementary proteomics techniques MALDI-MS/MS and LC-ESI-MS/MS were employed. Potential candidate biomarkers were validated by immunohistochemistry. RESULTS More than 43 proteins were found to be differentially expressed or up-regulated in KCOT lesions in comparison with patient-matched unaffected oral mucosa. These proteins bear important biological functions and are involved in cell proliferation, cytoskeletal re-organization, transcription, cellular motility and apoptosis. In particular, a number of differentially expressed proteins participate in autocrine regulation and signalization within JNK and p38 MAPK signalling pathways. CONCLUSIONS Immunohistochemical validation of chosen putative biomarkers revealed axin interaction partner and dorsalization-antagonist (AIDA), known as a protein that blocks activation of JNK signalling pathway, as a differential biomarker for KCOT lesions on an independent cohort of KCOT tissue samples in comparison with most prevalent intra-oseal lesions inflammatory odontogenic cysts.
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Affiliation(s)
- Ana Ivanišević Malčić
- Department of Endodontics and Restorative Dentistry, School of Dental Medicine, University of Zagreb, Zagreb, Croatia
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Gurgel CAS, Buim MEC, Carvalho KC, Sales CBS, Reis MG, de Souza RO, de Faro Valverde L, de Azevedo RA, Dos Santos JN, Soares FA, Ramos EAG. Transcriptional profiles of SHH pathway genes in keratocystic odontogenic tumor and ameloblastoma. J Oral Pathol Med 2014; 43:619-26. [PMID: 24930892 DOI: 10.1111/jop.12180] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/11/2014] [Indexed: 12/23/2022]
Abstract
BACKGROUND Sonic hedgehog (SHH) pathway activation has been identified as a key factor in the development of many types of tumors, including odontogenic tumors. Our study examined the expression of genes in the SHH pathway to characterize their roles in the pathogenesis of keratocystic odontogenic tumors (KOT) and ameloblastomas (AB). METHODS We quantified the expression of SHH, SMO, PTCH1, SUFU, GLI1, CCND1, and BCL2 genes by qPCR in a total of 23 KOT, 11 AB, and three non-neoplastic oral mucosa (NNM). We also measured the expression of proteins related to this pathway (CCND1 and BCL2) by immunohistochemistry. RESULTS We observed overexpression of SMO, PTCH1, GLI1, and CCND1 genes in both KOT (23/23) and AB (11/11). However, we did not detect expression of the SHH gene in 21/23 KOT and 10/11 AB tumors. Low levels of the SUFU gene were expressed in KOT (P = 0.0199) and AB (P = 0.0127) relative to the NNM. Recurrent KOT exhibited high levels of SMO (P = 0.035), PTCH1 (P = 0.048), CCND1 (P = 0.048), and BCL2 (P = 0.045) transcripts. Using immunolabeling of CCND1, we observed no statistical difference between primary and recurrent KOT (P = 0.8815), sporadic and NBCCS-KOT (P = 0.7688), and unicystic and solid AB (P = 0.7521). CONCLUSIONS Overexpression of upstream (PTCH1 and SMO) and downstream (GLI1, CCND1 and BCL2) genes in the SHH pathway leads to the constitutive activation of this pathway in KOT and AB and may suggest a mechanism for the development of these types of tumors.
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47
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Sweeney RT, McClary AC, Myers BR, Biscocho J, Neahring L, Kwei KA, Qu K, Gong X, Ng T, Jones CD, Varma S, Odegaard JI, Sugiyama T, Koyota S, Rubin BP, Troxell ML, Pelham RJ, Zehnder JL, Beachy PA, Pollack JR, West RB. Identification of recurrent SMO and BRAF mutations in ameloblastomas. Nat Genet 2014; 46:722-5. [PMID: 24859340 DOI: 10.1038/ng.2986] [Citation(s) in RCA: 231] [Impact Index Per Article: 23.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2013] [Accepted: 04/21/2014] [Indexed: 12/18/2022]
Abstract
Here we report the discovery of oncogenic mutations in the Hedgehog and mitogen-activated protein kinase (MAPK) pathways in over 80% of ameloblastomas, locally destructive odontogenic tumors of the jaw, by genomic analysis of archival material. Mutations in SMO (encoding Smoothened, SMO) are common in ameloblastomas of the maxilla, whereas BRAF mutations are predominant in tumors of the mandible. We show that a frequently occurring SMO alteration encoding p.Leu412Phe is an activating mutation and that its effect on Hedgehog-pathway activity can be inhibited by arsenic trioxide (ATO), an anti-leukemia drug approved by the US Food and Drug Administration (FDA) that is currently in clinical trials for its Hedgehog-inhibitory activity. In a similar manner, ameloblastoma cells harboring an activating BRAF mutation encoding p.Val600Glu are sensitive to the BRAF inhibitor vemurafenib. Our findings establish a new paradigm for the diagnostic classification and treatment of ameloblastomas.
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Affiliation(s)
- Robert T Sweeney
- 1] Department of Pathology, Stanford University, Stanford, California, USA. [2]
| | - Andrew C McClary
- 1] Department of Pathology, Stanford University, Stanford, California, USA. [2]
| | - Benjamin R Myers
- 1] Department of Biochemistry, Stanford University, Stanford, California, USA. [2] Department of Developmental Biology, Stanford University, Stanford, California, USA. [3] Institute for Stem Cell Biology and Regenerative Medicine, Stanford University, Stanford, California, USA. [4] Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, California, USA. [5]
| | - Jewison Biscocho
- 1] Department of Pathology, Stanford University, Stanford, California, USA. [2]
| | - Lila Neahring
- 1] Department of Biochemistry, Stanford University, Stanford, California, USA. [2] Department of Developmental Biology, Stanford University, Stanford, California, USA. [3] Institute for Stem Cell Biology and Regenerative Medicine, Stanford University, Stanford, California, USA. [4] Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, California, USA
| | - Kevin A Kwei
- 1] Genomic Health, Redwood City, California, USA. [2]
| | - Kunbin Qu
- Genomic Health, Redwood City, California, USA
| | - Xue Gong
- Department of Pathology, Stanford University, Stanford, California, USA
| | - Tony Ng
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Carol D Jones
- Department of Pathology, Stanford University, Stanford, California, USA
| | - Sushama Varma
- Department of Pathology, Stanford University, Stanford, California, USA
| | - Justin I Odegaard
- Department of Pathology, Stanford University, Stanford, California, USA
| | - Toshihiro Sugiyama
- Department of Biochemistry, Akita University Graduate School of Medicine, Akita, Japan
| | - Souichi Koyota
- Department of Biochemistry, Akita University Graduate School of Medicine, Akita, Japan
| | - Brian P Rubin
- Department of Anatomic Pathology, Cleveland Clinic, Cleveland, Ohio, USA
| | - Megan L Troxell
- Department of Pathology, Oregon Health and Sciences University, Portland, Oregon, USA
| | | | - James L Zehnder
- Department of Pathology, Stanford University, Stanford, California, USA
| | - Philip A Beachy
- 1] Department of Biochemistry, Stanford University, Stanford, California, USA. [2] Department of Developmental Biology, Stanford University, Stanford, California, USA. [3] Institute for Stem Cell Biology and Regenerative Medicine, Stanford University, Stanford, California, USA. [4] Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, California, USA
| | | | - Robert B West
- Department of Pathology, Stanford University, Stanford, California, USA
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48
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Kurppa KJ, Catón J, Morgan PR, Ristimäki A, Ruhin B, Kellokoski J, Elenius K, Heikinheimo K. High frequency of BRAF V600E mutations in ameloblastoma. J Pathol 2014; 232:492-8. [PMID: 24374844 PMCID: PMC4255689 DOI: 10.1002/path.4317] [Citation(s) in RCA: 204] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Revised: 12/18/2013] [Accepted: 12/19/2013] [Indexed: 12/18/2022]
Abstract
Ameloblastoma is a benign but locally infiltrative odontogenic neoplasm. Although ameloblastomas rarely metastasise, recurrences together with radical surgery often result in facial deformity and significant morbidity. Development of non-invasive therapies has been precluded by a lack of understanding of the molecular background of ameloblastoma pathogenesis. When addressing the role of ERBB receptors as potential new targets for ameloblastoma, we discovered significant EGFR over-expression in clinical samples using real-time RT-PCR, but observed variable sensitivity of novel primary ameloblastoma cells to EGFR-targeted drugs in vitro. In the quest for mutations downstream of EGFR that could explain this apparent discrepancy, Sanger sequencing revealed an oncogenic BRAF V600E mutation in the cell line resistant to EGFR inhibition. Further analysis of the clinical samples by Sanger sequencing and BRAF V600E-specific immunohistochemistry demonstrated a high frequency of BRAF V600E mutations (15 of 24 samples, 63%). These data provide novel insight into the poorly understood molecular pathogenesis of ameloblastoma and offer a rationale to test drugs targeting EGFR or mutant BRAF as novel therapies for ameloblastoma.
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Affiliation(s)
- Kari J Kurppa
- Department of Medical Biochemistry and Genetics and MediCity Research Laboratories, University of TurkuFinland
- Turku Doctoral Programme of Molecular MedicineTurku, Finland
| | - Javier Catón
- Division of Clinical and Diagnostic Sciences, KCL Dental Institute, King's College LondonUK
| | - Peter R Morgan
- Division of Clinical and Diagnostic Sciences, KCL Dental Institute, King's College LondonUK
| | - Ari Ristimäki
- Division of Pathology and Genetics, HUSLAB, Helsinki University Central Hospital, and Department of Pathology, Haartman Institute and Genome-Scale Biology, Research Programs Unit, University of HelsinkiFinland
| | - Blandine Ruhin
- Assistance Publique-Hôpitaux de Paris, Maxillofacial and Stomatology Department, Pitié-Salpêtrière Hospital, and Molecular Oral Pathophysiology, INSERM UMRS 872, Cordeliers Biomedical Institute, Paris 7 UniversityFrance
| | - Jari Kellokoski
- Department of Oral and Maxillofacial Surgery, Institute of Dentistry, University of Eastern Finland, and Department of Oral and Maxillofacial Diseases, Kuopio University HospitalFinland
| | - Klaus Elenius
- Department of Medical Biochemistry and Genetics and MediCity Research Laboratories, University of TurkuFinland
- Department of Oncology, Turku University HospitalFinland
- # These authors contributed equally to this study
| | - Kristiina Heikinheimo
- Department of Oral and Maxillofacial Surgery, Institute of Dentistry, University of Turku and Turku University Hospital, Turku, and Department of Oral Diagnostic Sciences, Institute of Dentistry, University of Eastern FinlandKuopio, Finland
- *Correspondence to: K Heikinheimo, Department of Oral and Maxillofacial Surgery, Institute of Dentistry, University of Turku, Lemminkäisenkatu 2, FI-20520 Turku, Finland. E-mail:
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Lee HS, Lee J, Kim SO, Song JS, Lee JH, Lee SI, Jung HS, Choi BJ. Comparative gene-expression analysis of the dental follicle and periodontal ligament in humans. PLoS One 2013; 8:e84201. [PMID: 24376796 PMCID: PMC3871683 DOI: 10.1371/journal.pone.0084201] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Accepted: 11/13/2013] [Indexed: 01/18/2023] Open
Abstract
The human dental follicle partially differentiates into the periodontal ligament (PDL), but their biological functions are different. The gene-expression profiles of the dental follicle and PDL were compared using the cDNA microarray technique. Microarray analysis identified 490 genes with a twofold or greater difference in expression, 365 and 125 of which were more abundant in the dental follicle and PDL, respectively. The most strongly expressed genes in the dental follicle were those related to bone development and remodeling (EGFL6, MMP8, FRZB, and NELL1), apoptosis and chemotaxis (Nox4, CXCL13, and CCL2), and tooth and embryo development (WNT2, PAX3, FGF7, AMBN, AMTN, and SLC4A4), while in the PDL it was the tumor-suppressor gene WIF1. Genes related to bone development and remodeling (STMN2, IBSP, BMP8A, BGLAP, ACP5, OPN, BMP3, and TM7SF4) and wound healing (IL1, IL8, MMP3, and MMP9) were also more strongly expressed in the PDL than in the dental follicle. In selected genes, a comparison among cDNA microarray, real-time reverse-transcription polymerase chain reaction, and immunohistochemical staining confirmed similar relative gene expressions. The gene-expression profiles presented here identify candidate genes that may enable differentiation between the dental follicle and PDL.
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Affiliation(s)
- Hyo-Seol Lee
- Department of Pediatric Dentistry, College of Dentistry, Yonsei University, Seoul, Republic of Korea
| | - Jongeun Lee
- Department of Pediatric Dentistry, College of Dentistry, Yonsei University, Seoul, Republic of Korea
| | - Seong-Oh Kim
- Department of Pediatric Dentistry, College of Dentistry, Yonsei University, Seoul, Republic of Korea
- Oral Science Research Center, College of Dentistry, Yonsei University, Seoul, Republic of Korea
| | - Je-Seon Song
- Department of Pediatric Dentistry, College of Dentistry, Yonsei University, Seoul, Republic of Korea
- Oral Science Research Center, College of Dentistry, Yonsei University, Seoul, Republic of Korea
| | - Jae-Ho Lee
- Department of Pediatric Dentistry, College of Dentistry, Yonsei University, Seoul, Republic of Korea
- Oral Science Research Center, College of Dentistry, Yonsei University, Seoul, Republic of Korea
| | - Syng-Ill Lee
- Division in Oral Physiology, Department of Oral Biology, College of Dentistry, Yonsei University, Seoul, Republic of Korea
| | - Han-Sung Jung
- Division in Anatomy & Developmental Biology, Department of Oral Biology, College of Dentistry, Yonsei University, Seoul, Republic of Korea
| | - Byung-Jai Choi
- Department of Pediatric Dentistry, College of Dentistry, Yonsei University, Seoul, Republic of Korea
- Oral Science Research Center, College of Dentistry, Yonsei University, Seoul, Republic of Korea
- * E-mail:
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50
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Dias CD, Brandão TB, Soares FA, Lourenço SV. Ameloblastomas: clinical-histopathological evaluation of 85 cases with emphasis on squamous metaplasia and keratinization aspects. Acta Odontol Scand 2013; 71:1651-5. [PMID: 23808553 DOI: 10.3109/00016357.2013.794388] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVES Ameloblastoma is a benign odontogenic neoplasm with an origin reputed to reactivation of odontogenic structures. Histological classification is based on microscopic features and architectural distribution of neoplastic cells. The importance of squamous metaplasia and keratinization has been disputed in ameloblastomas. Clinical and histopathological aspects were evaluated of 85 ameloblastomas, with attention to keratinization and squamous metaplasia features. STUDY DESIGN Clinical-demographical information of 85 ameloblastomas were gleaned from the medical records. Microscopic analysis of all cases was carried out with emphasis on keratinization aspects of each tumor. RESULTS Most ameloblastomas (54.12%) were diagnosed in males with a mean age of 37 years. Fifty-six patients were Caucasians (65.88%) and the mandible was affected in 68 (89.4%) cases. Most cases analyzed presented areas of squamous metaplasia/keratinization. Recurrence was detected in 16 cases; this was not related to keratinization aspects of the tumor. CONCLUSIONS Keratinization is a common feature in ameloblastomas with no impact in tumor behavior.
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