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Kamble A, Shimpi MR, Dash JK, Sahoo PK, Chaudhary S, Doiphode M. Adenomatoid Odontogenic Tumor of the Maxilla in a 13-year-old Patient: A Rare Case Report with a Review of Literature. Int J Clin Pediatr Dent 2021; 14:596-600. [PMID: 34824522 PMCID: PMC8585894 DOI: 10.5005/jp-journals-10005-1771] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Background The AOT is an atypical tumor of odontogenic origin that comprises about 0.1% of jaw tumors and cysts as well as up to 3% of odontogenic tumors (OTs). Aim and objective This review describes the clinical, radiographical, histopathological, and immunohistochemical properties of adenomatoid odontogenic tumor (AOT) and reports an occurrence of an AOT in a boy, 13 years of age. Case description A male, 13 years of age, presented with a swelling with respect to the left maxilla, painless, and with obvious facial asymmetry. The orthopantomogram and computed tomography scan revealed a large unilocular radiolucency in the left maxilla with permanent lateral incisor embedded within the lesion and permanent canine pushed away from its normal position. After complete enucleation of the cyst under local anesthesia and extraction of associated impacted permanent teeth and retained deciduous teeth related to the lesion, the defect was filled with a bone graft and closed. Postoperative follow-up was uneventful. Conclusion An accurate diagnosis should be established through clinical, radiographical, and pathological correlations in order to be able to differentiate AOT from other conditions for early diagnosis. Clinical significance This report highlights the salient features of the AOT to be able to correctly diagnose and manage the lesion. How to cite this article Kamble A, Shimpi MR, Dash JK, et al. Adenomatoid Odontogenic Tumor of the Maxilla in a 13-year-old Patient: A Rare Case Report with a Review of Literature. Int J Clin Pediatr Dent 2021;14(4):596–600.
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Affiliation(s)
- Amol Kamble
- Department of Paediatric and Preventive Dentistry, Bharati Vidyapeeth Dental College and Hospital, Bharati Vidyapeeth Deemed University, Pune, Maharashtra, India
| | - Manasi R Shimpi
- Department of Paediatric and Preventive Dentistry, Bharati Vidyapeeth Dental College and Hospital, Bharati Vidyapeeth Deemed University, Pune, Maharashtra, India
| | - Jayant K Dash
- Department of Paediatric and Preventive Dentistry, SCB Dental College and Hospital, Cuttack, Odisha, India
| | - Prasanna K Sahoo
- Department of Paediatric and Preventive Dentistry, SCB Dental College and Hospital, Cuttack, Odisha, India
| | - Shweta Chaudhary
- Department of Paediatric and Preventive Dentistry, Bharati Vidyapeeth Dental College and Hospital, Bharati Vidyapeeth Deemed University, Pune, Maharashtra, India
| | - Minu Doiphode
- Tooth Buddy Kids Dental Care, Pune, Maharashtra, India
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de França GM, Pinheiro JC, de Melo Fernandes Almeida DR, da Silva GG, de Lima KC, de Andrade Santos PP, Galvão HC. Analysis of Protein Immunoexpression and Its Interrelationship in the Pathogenesis of Odontomas and Ameloblastic Fibro-Odontomas: A Systematic Review. Head Neck Pathol 2021; 15:955-966. [PMID: 33394370 PMCID: PMC8384987 DOI: 10.1007/s12105-020-01260-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 11/21/2020] [Indexed: 10/22/2022]
Abstract
Odontomas and ameloblastic fibro-odontomas (AFOs) are the result of a developmental anomaly of odontogenic tissues. A literature review of proteins immunoexpressed in odontomas and AFOs was conducted in order to determine which proteins are involved in the pathogenesis of these lesions. AFO was changed to early odontoma in the 2017 WHO classification and will also be discussed in this article. A literature search was performed in the following electronic databases: PubMed/MEDLINE, Web of Science, Scopus, EMBASE, Lilacs, Cochrane Collaboration Library, and Science Direct. The research question was developed according to the population, intervention, comparison, and outcome (PICO) framework: Which proteins are related to the differentiation of odontomas and what is their interrelationship with AFOs? Thirty articles met all inclusion criteria and were selected for this systematic review, totaling 355 cases of odontomas and 43 cases of AFO. Similar immunoexpression was observed in odontomas and AFOs. Immunoexpression of proteins involved in cell differentiation was higher in compound odontomas than in complex odontomas. Proteins involved in histodifferentiation and enamel formation were more frequent in odontomas. The immunoexpression of enamel matrix proteins differs between odontomas and tooth germs, with their persistence being related to the development of odontomas. Compound odontomas exhibit the highest immunoexpression of proteins involved in cellular histodifferentiation and the Wnt/beta-catenin pathway is involved in tumor formation.
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Affiliation(s)
- Glória Maria de França
- grid.411233.60000 0000 9687 399XPostgraduate Program in Dental Science, Department of Dentistry, Federal University of Rio Grande do Norte, Av. Senador Salgado Filho, 1787, Lagoa Nova, Natal, RN CEP 59056-000 Brazil
| | - Juliana Campos Pinheiro
- grid.411233.60000 0000 9687 399XPostgraduate Program in Dental Science, Department of Dentistry, Federal University of Rio Grande do Norte, Av. Senador Salgado Filho, 1787, Lagoa Nova, Natal, RN CEP 59056-000 Brazil
| | - Dennys Ramon de Melo Fernandes Almeida
- grid.411233.60000 0000 9687 399XPostgraduate Program in Dental Science, Department of Dentistry, Federal University of Rio Grande do Norte, Av. Senador Salgado Filho, 1787, Lagoa Nova, Natal, RN CEP 59056-000 Brazil
| | - Gabriel Gomes da Silva
- grid.411233.60000 0000 9687 399XDepartment of Dentistry, Federal University of Rio Grande do Norte, Natal, Brazil
| | - Kênio Costa de Lima
- grid.411233.60000 0000 9687 399XPostgraduate Program in Public Health, Department of Dentistry, Federal University of Rio Grande do Norte, Natal, Brazil
| | - Pedro Paulo de Andrade Santos
- grid.411233.60000 0000 9687 399XPostgraduate Program in Dental Science, Department of Dentistry, Federal University of Rio Grande do Norte, Av. Senador Salgado Filho, 1787, Lagoa Nova, Natal, RN CEP 59056-000 Brazil
| | - Hébel Cavalcanti Galvão
- grid.411233.60000 0000 9687 399XPostgraduate Program in Dental Science, Department of Dentistry, Federal University of Rio Grande do Norte, Av. Senador Salgado Filho, 1787, Lagoa Nova, Natal, RN CEP 59056-000 Brazil
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Urs AB, Jot K, Kumar M. Ghost cell characterization in calcifying odontogenic cysts and dentinogenic ghost cell tumors: An immunohistochemical study. J Oral Biosci 2020; 62:336-341. [PMID: 33059062 DOI: 10.1016/j.job.2020.10.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 10/01/2020] [Accepted: 10/06/2020] [Indexed: 10/23/2022]
Abstract
OBJECTIVES The aim of our study was to ascertain the true nature of ghost cells (GCs) by immunolocalization of cytokeratin (CK) 6, CK19, and amelogenin in calcifying odontogenic cysts (COCs) and dentinogenic ghost cell tumors (DGCTs) in an attempt to determine the nature of this unique cell. METHODS A total of thirteen cases (six COCs and seven DGCTs) were examined immunohistochemically, in order to compare immunoreactivity for CK6, CK19, and amelogenin in odontogenic GCs. RESULTS Positive expression of amelogenin (92.3%) and CK6 (77%) was chiefly found in GCs. CK19 expression was observed in the cytoplasm of odontogenic epithelial cells of the lining epithelium. GCs were devoid of CK19 expression and were positive only on the cytoplasmic periphery. CONCLUSION In the current study, GCs showed accumulation of amelogenin and hard keratins in their cytoplasm during pathological transformation.
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Affiliation(s)
- Aadithya B Urs
- Department of Oral Pathology, Maulana Azad Institute of Dental Sciences, New Delhi, 110002, India.
| | - Kiran Jot
- Department of Oral Pathology, Maulana Azad Institute of Dental Sciences, New Delhi, 110002, India.
| | - Manoj Kumar
- Department of Oral Pathology, Maulana Azad Institute of Dental Sciences, New Delhi, 110002, India.
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Urzúa B, Ahumada-Ossandón R, Casa-Weisser D, Franco-Martínez ME, Ortega-Pinto A. Amelogenin in calcified matrices of odontogenic cysts and odontogenic tumors: An immunohistochemical study. J Dent Sci 2020; 16:7-14. [PMID: 33384773 PMCID: PMC7770315 DOI: 10.1016/j.jds.2020.05.028] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 05/29/2020] [Indexed: 11/06/2022] Open
Abstract
Background/purpose There are few studies comparing the expression of enamel proteins, such as amelogenin, and cytokeratins in cyst and odontogenic tumors like in ameloblastoma and odontogenic keratocyst, indicating that amelogenin could be a potential biomarker for the aggressiveness in the odontogenic tumors. The aim of this study was to evaluate if the expression of amelogenin, cytokeratin AE1/AE3 (CKAE1/AE3) and cytokeratin 14 (CK14) in cysts and odontogenic tumors with calcified matrices such as calcifying odontogenic cyst (COC), compound (CdO) and complex (CxO) odontomas, adenomatoid odontogenic tumor (AOT) and calcifying epithelial odontogenic tumor (CEOT) as an aggressiveness indicator. Materials and methods Three COC, eight CxO, three CdO, twelve AOT, two CEOT and three dental germs were submitted to an immunohistochemistry panel of antibodies composed of amelogenin, CKAE1/AE3 and CK14. Results CKAE1/AE3 and CK14 was present in all odontogenic epithelia. The amelogenin protein was detected in prismatic and amorphous calcified matrices of epithelial origin belonging to CxO, CdO, AOT, COC and the tooth germs used as controls. On the other hand, the CEOT was the only tumor or cyst studied that did not present immunostaining for amelogenin in calcified matrices. Conclusion Amelogenin was detected in pathologies with a low or absent recurrence rate and excellent prognosis. CEOT was the lesion of greater clinical aggressiveness which did not express amelogenin. The presence of amelogenin in calcified matrices of odontogenic arise could be an indicator of low aggressiveness.
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Affiliation(s)
- Blanca Urzúa
- Oral Biology and Biochemistry Laboratory, Faculty of Dentistry, University of Chile, Chile
| | | | - Daniel Casa-Weisser
- Departament of Pathology and Oral Medicine, Faculty of Dentistry, University of Chile, Chile
| | | | - Ana Ortega-Pinto
- Departament of Pathology and Oral Medicine, Faculty of Dentistry, University of Chile, Chile
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Zakaraia S, Almohareb M, Zaid K, Doumani M, Seirawan MY. Amelogenin is a Potential Biomarker for the Aggressiveness in Odontogenic Tumors. Asian Pac J Cancer Prev 2018; 19:1375-1379. [PMID: 29802703 PMCID: PMC6031836 DOI: 10.22034/apjcp.2018.19.5.1375] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Amelogenin (AMEL), the major structural protein of the enamel organic matrix, constitutes more than 90% of the
enamel’s protein content, Aberrations of amelogenin are thought to be involved in the oncogenesis of odontogenic
epithelium. The expression of amelogenin is possibly an indicator of differentiation of epithelial cells in the odontogenic
tumors. Aim of the study: Investigating the expression of amelogenin in some odontogenic tumors, using an
anti-amelogenin polyclonal antibody, and then compare it with AMEL expression in tooth buds as control. Materials
and Methods: study sample consisted of 10 formalin-fixed, paraffin- embedded specimens of ameloblastoma,
10 Keratocystic odontogenic tumors, and 10 tooth buds were conventionally stained with hematoxylin-eosin and
immunohistochemically with AMEL polyclonal antibody. Results: All of the odontogenic tumors expressed AMEL
in the epithelial component, Intensity of expression in ameloblastoma and Keratocystic odontogenic tumor was lower,
compared with tooth buds, Statistical analysis indicated a significant differences between the tumors and tooth buds.
Conclusion: Amelogenin can be used as a marker for odontogenic epithelium, and the expression of amelogenin is
possibly an indicator of epithelial cells differentiation in the odontogenic tumors, and therefore in prediction of the
histological behavior of odontogenic tumors.
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Affiliation(s)
- Safa Zakaraia
- Department of Oral Histology and Pathology, Faculty of Dentistry, Damascus University, Damascus, Syria
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Kok M, Chambers J, Ushio N, Miwa Y, Nakayama H, Uchida K. Amyloid-producing Odontoameloblastoma in a Black-tailed Prairie Dog (Cynomys ludovicianus). J Comp Pathol 2018; 159:26-30. [DOI: 10.1016/j.jcpa.2017.12.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 12/06/2017] [Accepted: 12/08/2017] [Indexed: 11/17/2022]
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Bologna-Molina R, Mikami T, Pereira-Prado V, Pires FR, Carlos-Bregni R, Mosqueda-Taylor A. Primordial odontogenic tumor: An immunohistochemical profile. Med Oral Patol Oral Cir Bucal 2017; 22:e314-e323. [PMID: 28390134 PMCID: PMC5432080 DOI: 10.4317/medoral.21859] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Accepted: 03/13/2017] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Primordial Odontogenic Tumor (POT) is a recently described odontogenic tumor characterized by a variably cellular loose fibrous tissue with areas similar to the dental papilla, covered by cuboidal to columnar epithelium that resembles the internal epithelium of the enamel organ, surrounded at least partly by a delicate fibrous capsule. The purpose of this study was to investigate the possible histogenesis and biological behavior of this rare tumor by means of a wide immunohistochemical analysis of its epithelial and mesenchymal components. MATERIAL AND METHODS The immunoexpression of twenty-three different antibodies were evaluated in four cases of POT. RESULTS The epithelial cells that cover the periphery of the tumor showed immunopositivity for Cytokeratins 14 and 19, while Amelogenin, Glut-1, MOC-31, Caveolin-1. Galectin-3, PITX2, p53, Bax, Bcl-2, Survivin and PTEN were variably expressed in focal areas. The mesenchymal component of the tumor was positive for Vimentin, Syndecan-1, PITX2, Endoglin (CD105), CD 34, Cyclin D1, Bax, Bcl-2, Survivin and p53. PTEN and CD 90 showed a moderate positivity. BRAF V600E and Calretinin were negative in all samples. Cell proliferation markers (Ki-67, MCM-7) were expressed in <5% of the tumor cells. CONCLUSIONS According to these immunohistochemical findings, we may conclude that POT is a benign odontogenic tumor in which there is both epithelial and mesenchymal activity during its histogenesis, as there is expression of certain components in particular zones in both tissues that suggests this tumor develops during the immature (primordial) stage of tooth development, leading to its inclusion within the group of benign mixed epithelial and mesenchymal odontogenic tumours in the current World Health Organization classification of these lesions.
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Affiliation(s)
- R Bologna-Molina
- Health Care Department, Universidad Autónoma Metropolitana Xochimilco, Calzada del Hueso 1100, Villa Quietud, Mexico City 04960,
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Sethi S, Kumar M, Aggarwal P, Indra Kumar HS, Sugandhi CD, Singh S. A case report and short review on changing trends in the site of occurrence of adenomatoid odontogenic tumor: Unravelling the past 15 years. Dent Res J (Isfahan) 2016; 13:462-471. [PMID: 27857774 PMCID: PMC5091007 DOI: 10.4103/1735-3327.192312] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Adenomatoid odontogenic tumor (AOT) is an uncommon benign odontogenic lesion, with debatable histogenesis and variable histopathology. A systematic and diverse insight into the evolution, clinical presentation, histology, and immunohistochemical findings of this lesion is reviewed and presented. We reviewed the data published from 2000 to 2014 of approximately 255 cases that revealed a significant change in the incidence of predominant site involved, in contrast to the findings published by Reichart. We have also included the chronological order of events leading to the coining of the term AOT, which shows the curiosity that has been dedicated to understanding the lesion. Immunohistochemistry is considered to be a hallmark in pathology for learning the molecular pathogenesis and giving a correct final diagnosis. Several markers have been used to investigate and understand this lesion, and a compilation of the findings has been tabulated.
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Affiliation(s)
- Sneha Sethi
- Department of Oral and Maxillofacial Pathology, Sudha Rustagi College of Dental Sciences and Research, Faridabad, Haryana, India
| | - Manish Kumar
- Department of Oral and Maxillofacial Pathology, Tatyasaheb Kore Dental College and Research Centre, Kohlapur, Maharashtra, India
| | - Pratul Aggarwal
- Department of Conservative Dentistry and Endodontics, DJ Dental College, Modinagar, Uttar Pradesh, India
| | - H S Indra Kumar
- Department of Prosthodontics, Tatyasaheb Kore Dental College and Research Centre, Kohlapur, Maharashtra, India
| | - Chetan D Sugandhi
- Department of Periodontics, Tatyasaheb Kore Dental College and Research Centre, Kohlapur, Maharashtra, India
| | - Silvie Singh
- Department of Oral Pathology, Tatyasaheb Kore Dental College and Research Centre, Kohlapur, Maharashtra, India
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Shruthi DK, Shivakumar MC, Tegginamani AS, Karthik B, Chetan BI. Cytokeratin 14 and cytokeratin 18 expressions in reduced enamel epithelium and dentigerous cyst: Possible role in oncofetal transformation and histogenesis- of follicular type of adenomatoid odontogenic tumor. J Oral Maxillofac Pathol 2015; 18:365-71. [PMID: 25948990 PMCID: PMC4409180 DOI: 10.4103/0973-029x.151330] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Accepted: 01/13/2015] [Indexed: 01/19/2023] Open
Abstract
Introduction: Odontogenic cysts and tumors arise from the structures and remnants associated with tooth development. Cysts and tumors derived from the odontogenic tissues constitute an unusually diverse group of lesions. This diversity reflects the complex development of the dental structures, since all these lesions originate through some alteration from the normal pattern of odontogenesis. Cytokeratin (CK) 14 is the typical intermediary filament of odontogenic epithelium, CK 18 is the major components of the intermediate filaments of simple or single layered epithelial tissue; it is not expressed in stratified squamous epithelium. The present study was undertaken to understand the expression pattern of these cytokeratins in dentigerous cyst, dental follicular tissue, adenomatoid odontogenic tumor (AOT) and unicystic ameloblastoma. Materials and Methods: The present study consists of 60 specimens consisting of 20 samples of Dentigerous cyst, 20 samples of Reduced enamel epithelium/dental follicles, 10 samples of Follicular type of AOT, 10 samples of unicystic ameloblastoma. The sections of these specimens were stained for CK 14 and CK 18. The number of cells positive for CK 14 and CK 18 was counted per 100 cells. The cells were counted in four randomly selected high-power fields and the mean was calculated. Scoring of cytokeratin 14 expressions was done using Remmele score. Results: The highest expression of cytokeratin 14 was noted in AOT, least was seen in dental follicle/Reduced enamel epithelium (REE). CK18 was negative in all the cases included in the present study. Conclusion: In the present study, the expression of CK14 was noted in AOT, Dentigerous cyst (DC), Unicystic Ameloblastoma (UCA) and Dental follicle/REE. The expressions between these lesions were compared. These expression pattern may provide an insight to the histogenesis of AOT.
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Affiliation(s)
- D K Shruthi
- Department of Oral Pathology and Microbiology, Subbaiah Institute of Dental Sciences, Shimoga, Karnataka, India
| | - M C Shivakumar
- Department of Anaesthesia, Subbaiah Institute of Medical Sciences, Shimoga, Karnataka, India
| | - Anand S Tegginamani
- Department of Oral Pathology and Microbiology, Coorg Institute of Dental Sciences, Virajpet, Karnataka, India
| | - B Karthik
- Department of Oral Pathology, Rishiraj Dental College, Bhopal, Madhya Pradesh, India
| | - B I Chetan
- Department of Oral and Maxillofacial Surgery, Subbaiah Institute of Dental Sciences, Shimoga, Karnataka, India
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Anigol P, Kamath VV, Satelur K, Anand N, Yerlagudda K. Amelogenin in odontogenic cysts and tumors: An immunohistochemical study. Natl J Maxillofac Surg 2015; 5:172-9. [PMID: 25937729 PMCID: PMC4405960 DOI: 10.4103/0975-5950.154822] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Background: Amelogenins are the major enamel proteins that play a major role in the biomineralization and structural organization of enamel. Aberrations of enamel-related proteins are thought to be involved in oncogenesis of odontogenic epithelium. The expression of amelogenin is possibly an indicator of differentiation of epithelial cells in the odontogenic lesions. Aims and Objectives: The present study aimed to observe the expression of amelogenin immunohistochemically in various odontogenic lesions. Materials and Methods: Paraffin sections of 40 odontogenic lesions were stained immunohistochemically with amelogenin antibodies. The positivity, pattern and intensity of expression of the amelogenin antibody were assessed, graded and statistically compared between groups of odontogenic cysts and tumors. Results: Almost all the odontogenic lesions expressed amelogenin in the epithelial component with the exception of an ameloblastic carcinoma. Differing grades of intensity and pattern were seen between the cysts and tumors. Intensity of expression was uniformly prominent in all odontogenic lesions with hard tissue formation. Statistical analysis however did not indicate significant differences between the two groups. Conclusion: The expression of amelogenin antibody is ubiquitous in odontogenic tissues and can be used as a definitive marker for identification of odontogenic epithelium.
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Affiliation(s)
- Praveen Anigol
- Department of Oral Pathology, PM Nadegouda Dental College, Bagalkot, India
| | - Venkatesh V Kamath
- Department of Oral Pathology, Dr. Syamala Reddy Dental College, Hospital and Research Centre, Bengaluru, Karnataka, India
| | - Krishnanand Satelur
- Department of Oral Pathology, Dr. Syamala Reddy Dental College, Hospital and Research Centre, Bengaluru, Karnataka, India
| | - Nagaraja Anand
- Department of Oral Pathology, KLE Institute of Dental Sciences, Bengaluru, Karnataka, India
| | - Komali Yerlagudda
- Department of Oral Pathology, Dr. Syamala Reddy Dental College, Hospital and Research Centre, Bengaluru, Karnataka, India
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Lee SK, Kim YS. Current Concepts and Occurrence of Epithelial Odontogenic Tumors: II. Calcifying Epithelial Odontogenic Tumor Versus Ghost Cell Odontogenic Tumors Derived from Calcifying Odontogenic Cyst. KOREAN JOURNAL OF PATHOLOGY 2014; 48:175-87. [PMID: 25013415 PMCID: PMC4087130 DOI: 10.4132/koreanjpathol.2014.48.3.175] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Revised: 06/01/2014] [Accepted: 06/03/2014] [Indexed: 12/22/2022]
Abstract
Calcifying epithelial odontogenic tumors (CEOTs) and ghost cell odontogenic tumors (GCOTs) are characteristic odontogenic origin epithelial tumors which produce calcifying materials from transformed epithelial tumor cells. CEOT is a benign odontogenic tumor composed of polygonal epithelial tumor cells that show retrogressive calcific changes, amyloid-like deposition, and clear cytoplasm. Differentially, GCOTs are a group of transient tumors characterized by ghost cell presence, which comprise calcifying cystic odontogenic tumor (CCOT), dentinogenic ghost cell tumor (DGCT), and ghost cell odontogenic carcinoma (GCOC), all derived from calcifying odontogenic cysts (COCs). There is considerable confusion about COCs and GCOTs terminology, but these lesions can be classified as COCs or GCOTs, based on their cystic or tumorous natures, respectively. GCOTs include ameloblastomatous tumors derived from dominant odontogenic cysts classified as CCOTs, ghost cell-rich tumors producing dentinoid materials as DGCTs, and the GCOT malignant counterpart, GCOCs. Many authors have reported CEOTs and GCOTs variably express keratins, β-catenin, BCL-2, BSP, RANKL, OPG, Notch1, Jagged1, TGF-β, SMADs, and other proteins. However, these heterogeneous lesions should be differentially diagnosed to allow for accurate tumor progression and prognosis prediction.
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Affiliation(s)
- Suk Keun Lee
- Department of Oral Pathology, College of Dentistry, Gangneung-Wonju National University, Gangneung, Korea
| | - Yeon Sook Kim
- Department of Dental Hygiene, College of Health Sciences, Cheongju University, Cheongju, Korea
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Bologna-Molina R, Salazar-Rodríguez S, Bedoya-Borella AM, Carreón-Burciaga RG, Tapia-Repetto G, Molina-Frechero N. A histopathological and immunohistochemical analysis of ameloblastic fibrodentinoma. Case Rep Pathol 2013; 2013:604560. [PMID: 23476862 PMCID: PMC3580908 DOI: 10.1155/2013/604560] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2012] [Accepted: 01/07/2013] [Indexed: 02/07/2023] Open
Abstract
Ameloblastic fibrodentinoma (AFD) is considered a mixed odontogenic tumor that is characterized by conserved epithelial and ectomesenchymal neoplastic components. AFD is composed of long narrow cords and islands of odontogenic epithelium; the epithelial strands lie in a myxoid cell-rich ectomesenchymal tissue with stellate-shaped fibroblasts that exhibit long slender cytoplasmic extensions that resemble dental papilla. The lesions show the presence of dysplastic dentin. Although AFD is a rare entity and its very existence is not completely accepted, based on the extent of histodifferentiation, it is considered to represent a stage between ameloblastic fibroma and ameloblastic fibroodontoma. This study aimed to provide a histopathological and immunohistochemical characterization of this infrequent tumor. A large panel of antibodies including amelogenin, Ck 19, calretinin, syndecan-1, E-cadherin, MSH2, histone H3, and Ki-67 was used to illustrate the nature of the tumor.
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Affiliation(s)
- Ronell Bologna-Molina
- 1Oral Pathology, Research Department, School of Dentistry, Universidad Juárez del Estado de Durango (UJED), 34000 Durango, DGO, Mexico
- 2School of Dentistry, Universidad de la República (UDELAR), 19200 Montevideo, Uruguay
- *Ronell Bologna-Molina:
| | - Sirced Salazar-Rodríguez
- 3Pathology Department, Instituto Nacional de Oncología y Radiobiología (INOR), 10400 Havana, Cuba
| | | | - Ramón Gil Carreón-Burciaga
- 1Oral Pathology, Research Department, School of Dentistry, Universidad Juárez del Estado de Durango (UJED), 34000 Durango, DGO, Mexico
| | - Gabriel Tapia-Repetto
- 2School of Dentistry, Universidad de la República (UDELAR), 19200 Montevideo, Uruguay
| | - Nelly Molina-Frechero
- 5Health Care Department, Universidad Autónoma Metropolitana, Xochimilco, 04960 Mexico City, DF, Mexico
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Sonawane K, Singaraju M, Gupta I, Singaraju S. Histopathologic diversity of Gorlin's cyst: a study of four cases and review of literature. J Contemp Dent Pract 2011; 12:392-7. [PMID: 22269201 DOI: 10.5005/jp-journals-10024-1065] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
AIM The purpose of the present article is to discuss four different case reports of the so-called calcifying odontogenic cyst and highlight the histopathological diversity of the same. BACKGROUND Calcifying odontogenic cyst was first described by Gorlin et al in 1962. Ever since, its identification as a specific odontogenic lesion, controversies and confusions have existed regarding the relationship between cystic lesions and solid tumor masses that share cellular and histomorphologic features. Although several classifications were proposed, dilemma still persists regarding the nature of these lesions as cysts, neoplasms and even malignancies. CONCLUSION AND CLINICAL SIGNIFICANCE The classifications discussed for the so-called calcifying odontogenic cyst by various authors have only added to further confusion rather than enlightening. Though many authors state that classifications remain only an academic exercise, it definitely has significance in treatment planning. Emphasis should, therefore, be laid on a universally accepted classification.
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Affiliation(s)
- Kishore Sonawane
- Department of Oral and Maxillofacial Pathology Rishiraj Dental College and Research Center, Bhopal, Madhya Pradesh, India
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Hirayama K, Miyasho T, Ohmachi T, Watanabe T, Yokota H, Taniyama H. Biochemical and immunohistochemical characterization of the amyloid in canine amyloid-producing odontogenic tumor. Vet Pathol 2010; 47:915-22. [PMID: 20651064 DOI: 10.1177/0300985810375047] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The amyloid of canine amyloid-producing odontogenic tumor (APOT) was evaluated biochemically and immunohistochemically. The N-terminal amino-acid sequence of purified amyloid protein from a canine APOT was strikingly similar to the sequence in both rat ameloblastin and porcine sheathlin. Immunohistochemically, the amyloid in APOT from 9 dogs was strongly reactive with anti-rat ameloblastin, anti-porcine sheathlin, and anti-canine APOT amyloid and weakly reactive with anti-porcine amelogenin but negative for antibodies to cytokeratins, vimentin, desmin, alpha-smooth muscle actin, amyloid A, glial fibrillary acidic protein, or S100 protein. The neoplastic epithelial cells of APOT were focally reactive with antibodies to ameloblastin, sheathlin, amelogenin, and canine APOT amyloid. The similarity in amino-acid sequence of the amyloid protein of canine APOT to that of enamel proteins, such as ameloblastin, sheathlin, and amelogenin, and the expression of these antigens in both APOT amyloid and in the neoplastic cells suggest that the amyloid of canine APOT is derived from enamel proteins secreted by ameloblasts.
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Affiliation(s)
- K Hirayama
- Department of Veterinary Biochemistry, School of Veterinary Medicine, Rakuno Gakuen University, 582 Bunkyodai-Midorimachi, Ebetsu, Hokkaido 069-8501, Japan
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16
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Hiraga T, Ninomiya T, Hosoya A, Nakamura H. Administration of the bisphosphonate zoledronic acid during tooth development inhibits tooth eruption and formation and induces dental abnormalities in rats. Calcif Tissue Int 2010; 86:502-10. [PMID: 20411381 DOI: 10.1007/s00223-010-9366-z] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2009] [Accepted: 04/03/2010] [Indexed: 02/04/2023]
Abstract
Bisphosphonates (BPs) are potent inhibitors of osteoclastic bone resorption and widely used for the treatment of osteoporosis and metastatic bone diseases. Recently, BPs have also been shown to benefit children with primary and secondary osteoporosis, including osteogenesis imperfecta; however, their long-term safety has not been established yet. Clinical and experimental studies have demonstrated that BPs delay or inhibit tooth eruption. The failure of tooth eruption causes several dental abnormalities. In this study, to determine the effects of BPs on tooth formation, the BP zoledronic acid (ZOL) was injected into 7- and 14-day-old rats, and the development of the mandibular teeth was examined. X-ray analysis demonstrated that ZOL inhibited the eruption of both incisors and molars and their formation, especially in the molar roots. Histological examination showed that, in ZOL-treated animals, alveolar bone remained unresorbed around tooth crowns, which injured ameloblasts and enamel matrix, leading to defects of the enamel. Furthermore, haphazard proliferation of odontogenic epithelium and mesenchyme associated with primitive tooth structures, which resembles human odontomas, was induced at the basal end of incisors but not around the molars. Tooth ankylosis to alveolar bone was occasionally observed in molars. These results suggest that administration of BPs during tooth development has the potential to inhibit tooth eruption and formation and to induce several types of dental abnormalities, which may be attributed to the altered osteoclastic activities.
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Affiliation(s)
- Toru Hiraga
- Department of Histology and Cell Biology, Matsumoto Dental University, 1780 Gobara-Hirooka, Shiojiri, Nagano, Japan.
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Modolo F, Biz MT, Martins MT, Machado de Sousa SO, de Araújo NS. Expression of extracellular matrix proteins in adenomatoid odontogenic tumor. J Oral Pathol Med 2010; 39:230-5. [DOI: 10.1111/j.1600-0714.2009.00846.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Kumamoto H. Molecular alterations in the development and progression of odontogenic tumors. ACTA ACUST UNITED AC 2010. [DOI: 10.3353/omp.14.121] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Ruhin B, Descroix V, Picard A, Berdal A. [Maxillary and mandibular carcinogenesis: research and prospects]. ACTA ACUST UNITED AC 2009; 110:227-32. [PMID: 19679326 DOI: 10.1016/j.stomax.2009.06.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2009] [Accepted: 06/07/2009] [Indexed: 10/20/2022]
Abstract
Development and growth of odontogenic tumours depend on impairment of numerous genes and molecules. In recent years, most of the genes involved in dental development were identified. This produced a new basis for the study of oral pathology and maxillofacial carcinogenesis. A better understanding of these molecular phenomena should allow to better determine the evolution of such lesions. Research breakthroughs should facilitate the development of new molecular and genetic therapeutic perspectives.
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Affiliation(s)
- B Ruhin
- Service de chirurgie maxillofaciale et stomatologie, hôpital adulte de Pitié-Salpêtrière, université Pierre-et-Marie-Curie-Paris 6, 47-83, boulevard de l'Hôpital, 75651 Paris cedex 13, France.
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20
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Kumamoto H, Yoshida M, Ooya K. Immunohistochemical detection of amelogenin and cytokeratin 19 in epithelial odontogenic tumors. Oral Dis 2008. [DOI: 10.1034/j.1601-0825.2001.70306.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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21
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Inoue M, Nagatsuka H, Tamamura R, Chong HS, Tsujigiwa H, Borkosky S, Fujii M, Nagai N, Setsu K. Localization of Oxytalan Fiber, type III Collagen and BMP Family in Conventional and Desmoplastic Ameloblastoma. J HARD TISSUE BIOL 2008. [DOI: 10.2485/jhtb.17.23] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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22
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Lucchese A, Scivetti M, Pilolli GP, Favia G. Analysis of ghost cells in calcifying cystic odontogenic tumors by confocal laser scanning microscopy. ACTA ACUST UNITED AC 2007; 104:391-4. [PMID: 17188527 DOI: 10.1016/j.tripleo.2006.09.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2006] [Revised: 08/29/2006] [Accepted: 09/06/2006] [Indexed: 10/23/2022]
Abstract
OBJECTIVE The confocal laser scanning microscope represents an effective tool for studying biological samples stained for fluorescence observation. In this study we have used the confocal microscope to analyze ghost cells in calcifying cystic odontogenic tumors. STUDY DESIGN Specimens from 15 calcifying cystic odontogenic tumor cases were stained with hematoxylin and eosin, and scanned by a confocal laser scanning microscope to generate optically sectioned images. RESULTS All of the analyzed samples presented autofluorescent cells that were identified as ghost cells. The degree of autofluorescence intensity was variable and may be a result of the presence of hard keratin. CONCLUSION The confocal laser scanning microscope may be of help in analyzing and defining the nature and extent of keratinization processes in calcifying cystic odontogenic tumor ghost cells.
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Affiliation(s)
- Alberta Lucchese
- Department of Odontostomatology and Surgery, Faculty of Medicine, University of Bari, Bari, Italy.
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Abstract
Odontogenic tumors are lesions derived from the elements of the tooth-forming apparatus and are found exclusively within the jawbones. This review represents a contemporary outline of our current understanding of the molecular and genetic alterations associated with the development and progression of odontogenic tumors, including oncogenes, tumor-suppressor genes, oncoviruses, growth factors, telomerase, cell cycle regulators, apoptosis-related factors, regulators of tooth development, hard tissue-related proteins, cell adhesion molecules, matrix-degrading proteinases, angiogenic factors, and osteolytic cytokines. It is hoped that better understanding of related molecular mechanisms will help to predict the course of odontogenic tumors and lead to the development of new therapeutic concepts for their management.
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Affiliation(s)
- H Kumamoto
- Division of Oral Pathology, Department of Oral Medicine and Surgery, Tohoku University Graduate School of Dentistry, Sendai, Japan
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Tsujigiwa H, Nagatsuka H, Han PP, Gunduz M, Siar CH, Oida S, Nagai N. Analysis of amelogenin gene (AMGX, AMGY) expression in ameloblastoma. Oral Oncol 2005; 41:843-50. [PMID: 15979380 DOI: 10.1016/j.oraloncology.2005.04.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2005] [Accepted: 04/11/2005] [Indexed: 10/25/2022]
Abstract
Although the amelogenin gene is expressed in ameloblastoma, the precise expression pattern of X and Y amelogenin genes (AMGX, AMGY) in this tumor has not yet been identified. In this study, we analyzed amelogenin gene expression in 19 samples (9 male, 10 female) of oral ameloblastomas by RT-PCR and detect the chromosomal origin of amelogenin mRNA by restriction enzyme digestion of the RT-PCR product. All tumor samples expressed amelogenin mRNA. We could detect increased level of AMGY expression in all male samples, higher than that of AMEX. It is an interesting finding as in normal male tooth development, the expression of AMGY is very much lower than that of AMGX. We postulate that epigenetic change of sex chromosomes may have some correlations with tumorigenesis of ameloblastoma. We also discuss the other possible mechanisms and points for future studies on this change in expression pattern.
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Affiliation(s)
- Hidetsugu Tsujigiwa
- Department of Oral Pathology and Medicine, Graduate School of Medicine and Dentistry, Okayama University, Japan
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Mesquita RA, Lotufo MA, Sugaya NN, De Araújo NS, De Araújo VC. Peripheral clear cell variant of calcifying epithelial odontogenic tumor: Report of a case and immunohistochemical investigation. ORAL SURGERY, ORAL MEDICINE, ORAL PATHOLOGY, ORAL RADIOLOGY, AND ENDODONTICS 2003; 95:198-204. [PMID: 12582361 DOI: 10.1067/moe.2003.63] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A case of peripheral calcifying epithelial odontogenic tumor, clear cell variant, located on the right gingival maxilla of a 48-year-old woman, presenting as a 2.0-cm solitary, firm nodule was studied. Microscopically, it was composed of polyhedral and clear epithelial cells associated with amyloid-like deposition. The clear epithelial cells exhibited granules that were positive for periodic acid-Schiff, and the amyloid-like deposit stained with Congo red showed a green birefringence in the polarized light. Polyhedral and clear epithelial cells were immunopositive for AE1/AE3 and cytokeratin 14. Immunoexpression of fibronectin and types I and III collagen were different between the amyloid-like deposits and the connective tissue stroma. Tenascin surrounded epithelial cells located inside the amyloid-like deposits. Laminin and type IV collagen were immunodetectable around the strands, cords, and nests of epithelial cells. This report represents the seventh case of peripheral calcifying epithelial odontogenic tumor, clear cell variant.
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Yoshida M, Kumamoto H, Ooya K, Mayanagi H. Immunohistochemical Analysis of Benign Mixed and Mesenchymal Odontogenic Tumors. ACTA ACUST UNITED AC 2003. [DOI: 10.3353/omp.8.125] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Veness MJ, Morgan G, Collins AP, Walker DM. Calcifying epithelial odontogenic (Pindborg) tumor with malignant transformation and metastatic spread. Head Neck 2001; 23:692-6. [PMID: 11443753 DOI: 10.1002/hed.1097] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Pindborg tumors (calcifying epithelial odontogenic tumors) are uncommon neoplasms of odontogenic origin most often located in the posterior mandible. First described in detail in 1955 by Pindborg, these tumors are considered benign but can be locally aggressive in nature, with recurrence rates of 10% to 15% reported. The malignant form of this tumor is exceedingly rare. METHODS We describe the case of a 64-year-old woman initially treated for a painful infected left mandibular third molar. The patient underwent extraction of the tooth and excision of an associated soft tissue component. Subsequent histologic review identified a Pindborg tumor of the left posterior mandible. RESULTS After initial excision, this tumor recurred twice, with the recurrences exhibiting a progression to a malignant Pindborg tumor (odontogenic carcinoma) with vascular invasion and spread to a cervical lymph node. Further treatment involved radical surgery and adjuvant radiotherapy. At last review 12 months after treatment, the patient was disease free. CONCLUSIONS This article describes only the second case of odontogenic carcinoma. The transformation from benign to malignant histologic findings has not previously been documented in this tumor. The salient clinical features of this case are presented along with supportive pathologic and radiologic evidence.
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Affiliation(s)
- M J Veness
- Department of Radiation Oncology, Westmead Hospital, Westmead, New South Wales, 2145, Sydney, Australia.
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29
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Er N, Dağdeviren A, Taşman F, Zeybek D. Neural cell adhesion molecule and neurothelin expression in human ameloblastoma. J Oral Maxillofac Surg 2001; 59:900-3; discussion 904. [PMID: 11474447 DOI: 10.1053/joms.2001.25025] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
PURPOSE The objective of the present study was to determine whether neural cell adhesion molecules (NCAM; CD56) and neurothelin (CD147) are expressed by adontogenic cells in the ameloblastoma. MATERIALS AND METHODS Frozen sections from ameloblastoma specimens (n = 7) were stained with monoclonal antibody-recognizing CD56 and CD147 molecules using indirect immunoperoxidase and indirect immunofluorescent techniques. RESULTS CD56 and CD147 molecules were strongly expressed by the peripheral columnar cells of the tumor nests. Neurothelin reactivity was also present in the stellate reticulum of the nests and in some stromal components. CONCLUSIONS The presence of these antigens in ameloblastoma supports the classic view about the neural crest origin of cells giving use to this tumor.
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Affiliation(s)
- N Er
- Received from the University of Hacettepe, Ankara, Turkey.
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Maiorano E, Altini M, Viale G, Piattelli A, Favia G. Clear cell odontogenic carcinoma. Report of two cases and review of the literature. Am J Clin Pathol 2001; 116:107-14. [PMID: 11447739 DOI: 10.1309/wuq8-d3a8-yv1y-0vtr] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Abstract
This study reviews the literature and reports on the morphologic and immunophenotypic features of 2 clear cell odontogenic carcinomas occurring in the mandible of elderly women, showing extensive infiltration into adjacent tissues. The tumor cells were large, with clear cytoplasm, and arranged in irregular sheets. Some of the latter demonstrated a peripheral rim of cells with eosinophilic cytoplasm or included duct-like structures. There was no evidence of ameloblastic differentiation. Most cells contained glycogen granules and were immunoreactive for cytokeratins and epithelial membrane antigen. In the differential diagnosis other clear cell odontogenic, salivary gland, and metastatic tumors should be considered. Both cases were treated with surgical excision, and the patients are free of disease after 3 and 5 years, respectively. In the literature, however, variable behavior of these tumors has been reported, including recurrence and metastases. It is recommended that terms such as clear cell ameloblastoma and clear cell odontogenic tumor not be used to describe such tumors.
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Affiliation(s)
- E Maiorano
- Department of Pathological Anatomy and Genetics, Section of Pathological Anatomy, University of Bari, Bari, Italy
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Toyosawa S, Fujiwara T, Ooshima T, Shintani S, Sato A, Ogawa Y, Sobue S, Ijuhin N. Cloning and characterization of the human ameloblastin gene. Gene 2000; 256:1-11. [PMID: 11054529 DOI: 10.1016/s0378-1119(00)00379-6] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
We isolated the full-length human ameloblastin (AMBN) cDNA clone using reverse transcription-polymerase chain reaction (RT-PCR) methods. Sequence analysis of the AMBN cDNA revealed an open reading frame of 1341bp encoding a 447-amino-acid protein. Comparison with pig, cattle, rat, and mouse AMBN sequences showed a high amino acid sequence similarity and led to the identification of a novel 78bp (26 amino acids) insert resulting from internal sequence duplication. By DNA analysis of a human genomic clones, the AMBN gene was shown to consist of 13 exons and a novel 78bp segment, which proved to comprise two small exons. Human ameloblastomas express AMBN transcripts that contain some mutations.
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Affiliation(s)
- S Toyosawa
- Department of Oral Pathology, Osaka University Faculty of Dentistry, 1-8 Yamadaoka, Suita, 565-0871, Osaka, Japan.
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Takata T, Zhao M, Uchida T, Wang T, Aoki T, Bartlett JD, Nikai H. Immunohistochemical detection and distribution of enamelysin (MMP-20) in human odontogenic tumors. J Dent Res 2000; 79:1608-13. [PMID: 11023283 DOI: 10.1177/00220345000790081401] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Enamelysin is a tooth-specific protease that was initially isolated from porcine enamel organ and subsequently from human odontoblasts. Since this protease is thought to play important roles in tooth development, the evaluation of enamelysin in odontogenic tumors may aid our understanding of the histogenesis and cell differentiation of such lesions. A monoclonal antibody (203-1C7) was generated against synthesized human enamelysin oligopeptide and was used to assess the immunolocalization of enamelysin in healthy developing tooth germs and various types of odontogenic lesions. In tooth germs, enamelysin expression was detected only in the secretory enamel. Thus, 203-1C7 may serve as an enamel-specific marker in the late stage of enamel matrix development and calcification. In odontogenic lesions, strong enamelysin staining was demonstrated in the immature enamel matrix of ameloblastic fibro-odontomas and odontomas. Furthermore, enamelysin was also detected in globular amyloid masses and calcified foci in calcifying epithelial odontogenic tumors, hyaline droplets, small and large mineralized areas in adenomatoid odontogenic tumors, and a portion of ghost cells in calcifying odontogenic cysts. Positive reactivity was also observed in selected tumor cells in some of these tumors. No intracellular staining for enamelysin was detected in ameloblastomas or the ameloblastic portion of ameloblastic fibro-odontomas. Also, enamelysin was not detected in dentin, dysplastic dentinoid hyaline matrices, and cementum that were present within the tumors examined. Thus, taken together, our results suggest that the enamelysin-specific monoclonal antibody (203-1C7) may be utilized as a marker of early enamel development and that enamelysin may be involved in the pathogenesis of specific odontogenic tumors.
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Affiliation(s)
- T Takata
- Department of Oral Pathology, Faculty of Dentistry, Hiroshima University, Japan.
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Takata T, Zhao M, Nikai H, Uchida T, Wang T. Ghost cells in calcifying odontogenic cyst express enamel-related proteins. THE HISTOCHEMICAL JOURNAL 2000; 32:223-9. [PMID: 10872887 DOI: 10.1023/a:1004051017425] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The so-called ghost cell is a unique cell type occurring in a variety of odontogenic and non-odontogenic lesions. However, the true nature of ghost cells has not been determined. In the present study, we examined the immunoreactivity of ghost cells in calcifying odontogenic cysts and dermal calcifying epitheliomas, with antibodies against amelogenin, enamelin, sheath protein (sheathlin) and enamelysin, in an attempt to clarify the nature of this unique cell. The cytoplasm of ghost cells in calcifying odontogenic cysts demonstrated distinct immunolocalization of the enamel-related proteins, while similar in the calcifying epitheliomas of the skin showed a negative reaction. The results indicate that the ghost cells in calcifying odontogenic cysts, as opposed to ghost cells in dermal calcifying epitheliomas, contain enamel-related proteins in their cytoplasm accumulated during the process of pathological transformation.
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Affiliation(s)
- T Takata
- Department of Oral Pathology, Hiroshima University School of Dentistry, Japan
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Papagerakis P, Peuchmaur M, Hotton D, Ferkdadji L, Delmas P, Sasaki S, Tagaki T, Berdal A. Aberrant gene expression in epithelial cells of mixed odontogenic tumors. J Dent Res 1999; 78:20-30. [PMID: 10065942 DOI: 10.1177/00220345990780010201] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Comparative investigations of odontogenic cells in normally forming teeth and tumors may provide insights into the mechanisms of the differentiation process. The present study is devoted to late phenotypic markers of ameloblast and odontoblast cells, i.e., proteins involved in biomineralization. The in situ expression of amelogenins, keratins, collagens type III and IV, vimentin, fibronectin, osteonectin, and osteocalcin was performed on normal and tumor odontogenic human cells. The pattern of protein expression showed some similarities between ameloblasts and odontoblasts present in normally developing human teeth and cells present in neoplastic tissues of ameloblastic fibroma, ameloblastic fibro-odontomas, and complex odontomas. Amelogenins (for ameloblasts) and osteocalcin (for odontoblasts) were detected in cells with well-organized enamel and dentin, respectively. In contrast, "mixed" cells located in epithelial zones of mixed odontogenic tumors co-expressed amelogenins and osteocalcin, as shown by immunostaining. The presence of osteocalcin transcripts was also demonstrated by in situ hybridization in these cells. Keratins and vimentin were detected in the same epithelial zones. Tumor epithelial cells were associated with various amounts of polymorphic matrix (amelogenin- and osteocalcin-immunoreactive), depending on the types of mixed tumors. No osteocalcin labeling was found in epithelial tumors. This study confirms that the differentiation of normal and tumor odontogenic cells is accompanied by the expression of some common molecules. Furthermore, the gene products present in normal mesenchymal cells were also shown in odontogenic tumor epithelium. These data may be related to a tumor-specific overexpression of the corresponding genes transcribed at an undetectable level during normal development and/or to an epithelial-mesenchymal transition proposed to occur during normal root formation. A plausible explanation for the results is that the odontogenic tumor epithelial cells are recapitulating genetic programs expressed during normal odontogenesis, but the tumor cells demonstrate abnormal expression patterns for these genes.
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Affiliation(s)
- P Papagerakis
- Laboratoire de Biologie-Odontologie, Institut Biomédical des Cordeliers, Université Paris VII, France
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Harada H, Mitsuyasu T, Nakamura N, Higuchi Y, Toyoshima K, Taniguchi A, Yasumoto S. Establishment of ameloblastoma cell line, AM-1. J Oral Pathol Med 1998; 27:207-12. [PMID: 9682983 DOI: 10.1111/j.1600-0714.1998.tb01943.x] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Ameloblastomas are slowly growing, locally invasive neoplasms with a potentially destructive behaviour. The molecular mechanisms that regulate the cell growth and invasion of ameloblastoma cells are unknown. Because ameloblastoma cells placed in culture have a very limited lifespan, the establishment of immortalized clones of ameloblastoma cells would aid its study. We produced an immortalized ameloblastoma cell line (AM-1) using human papillomavirus type-16. This cell line maintains epithelial cell morphology and expresses cytokeratins K8, K14, K18, K19. Furthermore, bcl-2 protein, which prevents apoptosis, is expressed. We investigated the behaviour of these cells on a collagen matrix in vitro. These cells grew in a monolayer over foci of collagen degradation and could invade the collagen gel at such sites. Since the behavior of cell line AM-1 mimics the behavior of ameloblastoma in vivo, it may be a valuable model for the study of these neoplasms.
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Affiliation(s)
- H Harada
- Second Department of Oral Anatomy and Cell Biology, Kyushu Dental College, Kitakyushu, Japan
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P. Philipsen H, A. Reichart P, Nikai H. The Adenomatoid Odontogenic Tumour(AOT): An Update. ACTA ACUST UNITED AC 1997. [DOI: 10.3353/omp.2.55] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Kumamoto H, Miyazawa M, Ooya K. Characterization of novel monoclonal antibodies raised against formalin-fixed, paraffin-embedded human ameloblastoma. J Oral Pathol Med 1996; 25:484-90. [PMID: 8959556 DOI: 10.1111/j.1600-0714.1996.tb00302.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
To obtain monoclonal antibodies reactive with odontogenic but not other types of epithelium, mice were immunized with homogenates of fixed ameloblastoma tissues, and monoclonal antibodies Y4 and M11 were produced. Y4 reacted immunohistochemically with odontogenic epithelial components but not with those of squamous differentiation, while M11 reacted with odontogenic epithelial components and a part of keratotic epithelial tissues. Immunoglobulin isotypes of both antibodies were IgM as determined by Ouchterlony immunodiffusion and enzyme-linked immunosorbent assays. Western blotting revealed that the antigen recognized by Y4 had a molecular mass of approximately 66 kDa; however, the antigen reactive with M11 was not identified by Western blotting in spite of various attempts in changing reaction conditions. These antibodies may be beneficial to histological analyses of odontogenic tissues and their related lesions.
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Affiliation(s)
- H Kumamoto
- Department of Oral Pathology, Tohoku University School of Dentistry, Sendai, Japan
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Takata T, Ogawa I, Miyauchi M, Ijuhin N, Nikai H, Fujita M. Non-calcifying Pindborg tumor with Langerhans cells. J Oral Pathol Med 1993; 22:378-83. [PMID: 8283404 DOI: 10.1111/j.1600-0714.1993.tb01093.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
A rare case of calcifying epithelial odontogenic tumor (CEOT) devoid of calcification is reported with histochemical, immunohistochemical and electron microscopic studies. The tumor occurred intraosseously in the left maxillary canine and premolar region of a 58-year-old man. The tumor chiefly consisted of scattered small islands of epithelial cells in an abundant fibro-myxoid connective tissue stroma. Among the nests, there were many spherical bodies of eosinophilic substance for which non-AA amyloid and non-keratin or basal lamina-like natures were demonstrated histochemically and immunohistochemically. In some nests, there were a few, occasionally several, cells positive for S-100 protein. Ultrastructurally, Langerhans cells with indented nuclei and Birbeck's granules were seen among tumor cells. The prognostic significance of the paucity of calcification and the presence of Langerhans cells in CEOT of which this is only the second description is discussed.
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Affiliation(s)
- T Takata
- Clinical Laboratory, Hiroshima University School of Dentistry, Japan
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