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Chettiankandy TJ, Sachdev SS, Kende PP, Sardar MA, Saju R. Adenoid ameloblastoma with dentinoid: A rare hybrid odontogenic tumor. INDIAN J PATHOL MICR 2024; 67:441-444. [PMID: 38391318 DOI: 10.4103/ijpm.ijpm_186_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Accepted: 05/09/2022] [Indexed: 02/24/2024] Open
Abstract
BACKGROUND Adenoid ameloblastoma with dentinoid (AAD) is a hybrid odontogenic tumor comprising histopathological presentation of ameloblastoma (AM) and adenomatoid odontogenic tumor (AOT) along with extracellular dentinoid material. CASE PRESENTATION A 35-year-old female reported an asymptomatic swelling in the left mandibular posterior region. Histopathological examination revealed composite features of AM with AOT along with dentinoid material, which stained positively with Van Gieson and trichrome stains. CONCLUSION The present case report serves to add further to the modicum of literature reports pertaining to AAD, which may gain recognition as a distinct entity in future World Health Organization (WHO) classification of odontogenic tumors.
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Affiliation(s)
- Tabita J Chettiankandy
- Department of Oral Pathology and Microbiology, Government Dental College and Hospital, Mumbai, Maharashtra, India
| | - Sanpreet S Sachdev
- Department of Oral Pathology and Microbiology, Government Dental College and Hospital, Mumbai, Maharashtra, India
| | - Prajwalit P Kende
- Department of Oral and Maxillofacial Surgery, Government Dental College and Hospital, Mumbai, Maharashtra, India
| | - Manisha A Sardar
- Department of Oral Pathology and Microbiology, Government Dental College and Hospital, Mumbai, Maharashtra, India
| | - Reshma Saju
- Department of Oral Medicine and Radiology, Government Dental College and Hospital, Mumbai, Maharashtra, India
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2
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Adenoid Ameloblastoma: The Histological Paradox. Head Neck Pathol 2022; 16:538-539. [PMID: 34491520 PMCID: PMC9187819 DOI: 10.1007/s12105-021-01372-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Accepted: 08/06/2021] [Indexed: 10/20/2022]
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3
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Ahammed H, Seema T, Cheranjeevi J. Complex Odontoma at an Unusual Site in a Child: A Case Report. Int J Clin Pediatr Dent 2021; 14:438-440. [PMID: 34720522 PMCID: PMC8543978 DOI: 10.5005/jp-journals-10005-1950] [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] [Indexed: 11/23/2022] Open
Abstract
Odontomas are known as the most common odontogenic tumor and usually present without clinical symptoms. It can be divided into compound odontoma and complex odontoma. Compound odontomas are calcified tissue and they bear similarity to the teeth, whereas complex odontomas do not show similarity to the tooth. Diagnosis of the odontomas is usually accidental on radiographic examination. Complex odontomas are commonly seen in the posterior mandible. Apart from the few case reports regarding the complex odontoma of the anterior mandibular region, reported occurrence in this site is rare. Here, authors described a case of a child who presented with a chief complaint of swelling in the anterior mandibular canine region. After clinical examination and required investigations, provisionally, it was diagnosed as complex odontoma. It was surgically removed and histopathological examination confirmed the provisional diagnosis. How to cite this article: Ahammed H, Seema T, Cheranjeevi J. Complex Odontoma at an Unusual Site in a Child: A Case Report. Int J Clin Pediatr Dent 2021;14(3):438–440.
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Affiliation(s)
- Haseeb Ahammed
- Department of Pedodontics and Preventive Dentistry, HP Government Dental College and Hospital, Shimla, Himachal Pradesh, India
| | - Thakur Seema
- Department of Pedodontics and Preventive Dentistry, HP Government Dental College and Hospital, Shimla, Himachal Pradesh, India
| | - Jayam Cheranjeevi
- Department of Pedodontics and Preventive Dentistry, HP Government Dental College and Hospital, Shimla, Himachal Pradesh, India
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4
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Niu X, Huang B, Yang J, Qiao X, Chen L, Liu J, Xu J, Zhong M. Odontogenic carcinosarcoma with dentinoid: a rare case report. J Int Med Res 2021; 49:3000605211045555. [PMID: 34586932 PMCID: PMC8485321 DOI: 10.1177/03000605211045555] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Odontogenic carcinosarcoma is a very rare malignant odontogenic tumor, characterized by malignant epithelial and mesenchymal components. Studies have reported several cases of odontogenic carcinosarcoma, mainly in the upper and lower jaws, with malignant clinical manifestations. Herein, we present the case of a 58-year-old woman with odontogenic carcinosarcoma with dentinoid in the left maxilla. The invasion range was large, and the left maxillary molar was missing. Histology revealed odontogenic carcinosarcoma with bidirectional differentiation characteristics and comprising three components: malignant epithelium, malignant interstitium, and dentinoid. The patient subsequently underwent nasal endoscopic sinus tumor resection, and she recovered well after surgery. After a strict 4-year follow-up, to date, there are still no signs of disease or local recurrence. To our knowledge, this is the first reported case of odontogenic carcinosarcoma with dentinoid. Our study describes the clinical, morphological, and immunohistochemical characteristics of this case, and distinguishes it from related diseases.
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Affiliation(s)
- Xing Niu
- Department of Stomatology, Xiang'an Hospital of Xiamen University, Xiamen, Fujian, China
| | - Biying Huang
- Department of Oral Histopathology, School and Hospital of Stomatology, China Medical University, Liaoning Province Key Laboratory of Oral Disease, Shenyang, Liaoning, China
| | - Jing Yang
- Department of Pathology, 457651First Affiliated Hospital of Jinzhou Medical University, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning, China
| | - Xue Qiao
- Department of Central Laboratory, School and Hospital of Stomatology, China Medical University, Liaoning Province Key Laboratory of Oral Disease, Shenyang, Liaoning, China
| | - Lijie Chen
- Department of Stomatology, Xiang'an Hospital of Xiamen University, Xiamen, Fujian, China
| | - Jinwen Liu
- Department of Oral Histopathology, School and Hospital of Stomatology, China Medical University, Liaoning Province Key Laboratory of Oral Disease, Shenyang, Liaoning, China
| | - Jingping Xu
- Department of Stomatology, Xiang'an Hospital of Xiamen University, Xiamen, Fujian, China
| | - Ming Zhong
- Department of Stomatology, Xiang'an Hospital of Xiamen University, Xiamen, Fujian, China
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5
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Ramani P, Krishnan RP, Pandiar D, Thamilselvan S. A rare combined motley variety of odontogenic tumors - Hybrid lesion or a new entity? Oral Oncol 2021; 124:105521. [PMID: 34509369 DOI: 10.1016/j.oraloncology.2021.105521] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Accepted: 09/03/2021] [Indexed: 11/17/2022]
Affiliation(s)
- Pratibha Ramani
- Department of Oral Pathology and Microbiology, Saveetha Dental College and Hospitals, Chennai, Tamil Nadu 600077, India
| | - Reshma Poothakulath Krishnan
- Department of Oral Pathology and Microbiology, Saveetha Dental College and Hospitals, Chennai, Tamil Nadu 600077, India.
| | - Deepak Pandiar
- Department of Oral Pathology and Microbiology, Saveetha Dental College and Hospitals, Chennai, Tamil Nadu 600077, India
| | - Snega Thamilselvan
- Department of Oral Pathology and Microbiology, Saveetha Dental College and Hospitals, Chennai, Tamil Nadu 600077, 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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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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8
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Atypical Intracranial Compound Simil Odontoma. J Craniofac Surg 2019; 30:e300-e301. [PMID: 31166272 DOI: 10.1097/scs.0000000000005212] [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] Open
Abstract
Odontoma is the most common mixed epithelial and mesenchymal tumour-like malformation which affects maxillary bones. Clinically, Odontomas present as lesions of benign behavior, causing little or no deformity, are asymptomatic, with self-limited growth and usually detected on routine radiographs. Radiographically, they are radiopaque lesions, well-demarcated surrounded by a thin soft tissue capsule. Compound odontomas consist of numerous tooth-like structures, whereas in complex odontomas it consists of a disorganized mass of calcified tissue. The aim of this article was to report an atypical case of intracranial compound odontoma, in the middle cranial fossa, reaching the sphenoidal sinus, which has been followed for 10 years.
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9
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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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10
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Rai HK, Pai SM, Dayakar A, Supriya H. Adenoid ameloblastoma with dentinoid: A rare hybrid variant. J Oral Maxillofac Pathol 2017; 21:319. [PMID: 28932051 PMCID: PMC5596692 DOI: 10.4103/jomfp.jomfp_53_15] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Odontogenic tumors comprise an unusual group of lesions of the jaw and present diverse histological patterns. Derived from the primordial tooth-forming tissues, they represent a heterogeneous group of lesions that range from hamartomas to benign and malignant neoplasms of variable aggressiveness. Sporadic case reports and diverse complex histogenetic source also defy categorization of odontogenic tumors. Many can be diagnosed accurately based on the distinctive clinical, radiological and histopathological presentation. Considerable variations in the clinicopathological presentation of odontogenic tumors can be confusing, increasing the chance of misdiagnosis. An interesting case of adenoid ameloblastoma reported in a 55-year-old male patient in the mandible, presenting with a diverse and intriguing histopathology, is discussed here.
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Affiliation(s)
- Harishchandra K Rai
- Department of Oral Pathology and Microbiology, KVG Dental College and Hospital, Sullia, Karnataka, India
| | - Shaila M Pai
- Department of Oral Pathology and Microbiology, KVG Dental College and Hospital, Sullia, Karnataka, India
| | - Anitha Dayakar
- Department of Oral Pathology and Microbiology, KVG Dental College and Hospital, Sullia, Karnataka, India
| | - H Supriya
- Department of Oral Pathology and Microbiology, KVG Dental College and Hospital, Sullia, Karnataka, India
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11
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Papagerakis P, Ibarra JM, Inozentseva N, DenBesten P, MacDougall M. Mouse Amelogenin Exons 8 and 9: Sequence Analysis and Protein Distribution. J Dent Res 2016; 84:613-7. [PMID: 15972588 DOI: 10.1177/154405910508400706] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Amelogenin is the major protein of the developing enamel. Two additional exons, termed 8 and 9, have been characterized in the rat. Our aim was: to identify the mouse amelogenin exons 8/9 sequences; to investigate the potential presence of the alternative spliced isoforms of amelogenin exons 8/9; and to immunolocalize proteins containing sequences encoded by exons 8/9 during odontogenesis. RT-PCR analysis with exon 9 anti-sense primer generated 2 major amplicons with the use of a mouse tooth cDNA library and dental cell lines. DNA sequence analysis showed 93% identify with the rat exons 8/9 sequence. Alternative splicing of exon 3 was also found, but only in cDNAs lacking exons 8 and 9. Immunohistochemistry localized exons 8/9-encoded proteins in ameloblasts, young odontoblasts, and stratum intermedium cells. Analysis of our data supports the hypothesis that: (1) AMELX contains 2 additional exons; (2) ameloblasts and odontoblasts synthesize amelogenin 8/9; and (3) amelogenin splice variants may have unique functions during tooth formation.
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Affiliation(s)
- P Papagerakis
- Department of Pediatric Dentistry, Dental School, University of Texas Health Science Center San Antonio, MSC 7888, 7703 Floyd Curl Drive, San Antonio, TX 78229-3900, USA
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12
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Kale YJ, Dahake PT, Patil PS, Dadpe MV. Management of a massive compound odontoma in a 9-year child. Contemp Clin Dent 2016; 7:409-12. [PMID: 27630512 PMCID: PMC5004561 DOI: 10.4103/0976-237x.188582] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
The purpose of this paper is to describe the case of surgical management of massive compound odontoma with 36 denticles in a 9-year-boy who presented with a complaint of pain and swelling in mandibular left posterior region and retained 74. The denticles were removed after the removal of retained 74 completely and wound healing was observed. Odontomas are considered as hamartomatous dental malformation rather than true neoplasm of odontogenic origin. They are the most commonly occurring abnormally formed dental tissues that interfere with eruption of associated teeth. The eruption disturbances seen due to odontomas are delayed eruption or deflection of associated teeth. These malformations are usually asymptomatic and discovered during routine radiographic investigations. Correct diagnosis followed by proper treatment plan results in a favorable prognosis.
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Affiliation(s)
- Yogesh J Kale
- Department of Pedodontics and Preventive Dentistry, MIDSR Dental College and Hospital, Latur, Maharashtra, India
| | - Prasanna T Dahake
- Department of Pedodontics and Preventive Dentistry, MIDSR Dental College and Hospital, Latur, Maharashtra, India
| | - Prasannakumari S Patil
- Department of Pedodontics and Preventive Dentistry, MIDSR Dental College and Hospital, Latur, Maharashtra, India
| | - Mahesh V Dadpe
- Department of Pedodontics and Preventive Dentistry, MIDSR Dental College and Hospital, Latur, Maharashtra, India
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Abstract
The aim of the present work is to analyze all scientific evidence to verify whether similarities supporting a unified explanation for odontomas and supernumerary teeth exist. A literature search was first conducted for epidemiologic studies indexed by PubMed, to verify their worldwide incidence. The analysis of the literature data shows some interesting similarities between odontomas and supernumerary teeth concerning their topographic distribution and pathologic manifestations. There is also some indication of common genetic and immuno-histochemical factors. Although from a nosological point of view, odontomas and supernumeraries are classified as distinct entities, they seem to be the expression of the same pathologic process, either malformative or hamartomatous.
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Affiliation(s)
- Roberto Pippi
- “Sapienza” University of Rome - Department of Odontostomatological and Maxillo Facial Sciences - Via Caserta 6, 00161 Rome - Italy
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14
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A peripheral ameloblastic fibro-odontoma in a 3-year-old girl: case report, immunohistochemical analysis, and literature review. Case Rep Dent 2014; 2014:321671. [PMID: 25161776 PMCID: PMC4100273 DOI: 10.1155/2014/321671] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2014] [Accepted: 06/12/2014] [Indexed: 02/04/2023] Open
Abstract
Ameloblastic fibro-odontoma (AFO) predominantly occurs in the jaw bones of children and young adults. Extraosseous AFO is extremely rare. We describe a peripheral ameloblastic fibro-odontoma in the maxillary gingiva of a 3-year-old girl. The clinical appearance resembled fiery red reactive gingival lesions. The histopathological examination of the excised lesion showed small islands and cords of odontogenic epithelium with cellular myxoid stroma in the subepithelial tissue. The mass contained calcified material and an enamel-like deposit. Many small blood vessels appeared in the connective tissue surrounding the odontogenic epithelium. The immunohistochemical assays showed strong reactivity for amelogenin, β-catenin, CD44, and CD31 in the tissue sections. There was no recurrence after the 1-year follow-up. Because this lesion clinically resembles other nonneoplastic lesions and is very rare in gingiva, establishing a correct diagnosis is achieved only based on specific histological characteristics. Conservative excision of the tumor is the treatment of choice.
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15
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Ramesh V, Singh S, Bailwad S, Kiran K, Agarwal R, Singh A. The complexity of stromal changes in desmoplastic ameloblastoma. Ann Med Health Sci Res 2014; 4:S14-7. [PMID: 25031898 PMCID: PMC4083729 DOI: 10.4103/2141-9248.131694] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Ameloblastoma is usually considered a homogenous neoplasm and is thought of as the most primitive of all odontogenic neoplasms. However, detailed investigations have proven clinicopathological diversity in a significant number of cases, thus mounting the evidence in favor of considering ameloblastoma as a mysterious lesion. The purpose of this article is to report a unique case of desmoplastic ameloblastoma and to throw light on the atypical changes noticed in the stromal component. The findings of this case have served to add interesting parameters to the study of stromal changes associated with this perplexing odontogenic tumor.
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Affiliation(s)
- V Ramesh
- Department of Oral Pathology and Microbiology, Mahatma Gandhi Postgraduate Institute of Dental Sciences, Puducherry, India
| | - S Singh
- Department of Oral Pathology and Microbiology, Dr. Harvansh Singh Judge Institute of Dental Sciences and Hospital, Panjab University, Chandigarh, India
| | - Sa Bailwad
- Department of Pediatric Dentistry, MAHSA University, Kualalumpur, Malaysia
| | - K Kiran
- Department of Periodontics, Al Ameen Dental College and Hospital, Bijapur, Karnataka, India
| | - Rk Agarwal
- Department of Pedodontics, KMCT Dental College, Kozhikode, Kerala, India
| | - A Singh
- Department of E.C.H.S., Phagwara, Punjab, India
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16
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Abstract
Odontomas are considered to be hamartomas rather than a true neoplasm. They consist chiefly of enamel and dentin, with variable amount of pulp and cementum when fully developed. They are generally asymptomatic and are included under the benign calcified odontogenic tumors. They are usually discovered on routine radiographic examination. Eruption of an odontoma in the oral cavity is rare. Peripheral compound odontomas arise extraosseously and have a tendency to exfoliate. In this article we are reporting a case of a 15-year-old girl with peripheral compound odontoma, with a single rudimentary tooth-like structure in the mandibular right second molar region, which is about to be exfoliated. Its eruption in the oral cavity and location in the mandibular posterior region is associated with aplasia of the mandibular right second molar, making it an interesting case for reporting.
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Affiliation(s)
- Se Shekar
- Department of Orthodontics, M S Ramaiah Dental College, Bangalore, Karnataka, India
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17
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Bansal AK, Shetty DC, Bindal R, Pathak A. Amelogenin: A novel protein with diverse applications in genetic and molecular profiling. J Oral Maxillofac Pathol 2012; 16:395-9. [PMID: 23248473 PMCID: PMC3519216 DOI: 10.4103/0973-029x.102495] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Tooth enamel is a unique entity among all mineralized tissues because of the presence of high mineral content. It is non collagenous and does not undergo resorption and remodelling. Its formation occurs through a transient collaborating network of enamel matrix proteins which controls hydroxyapatite crystal growth and orientation. Amelogenins constitute about 90% of the total enamel matrix proteins and play a major role in enamel bio mineralization. Amelogenin isoforms coalesce into nanospheres thus dictating the width and thickness of apatite crystals. The X and Y copies of amelogenins do not undergo homologous recombination, thus preferring it for sex determination in modern forensics. Recently, it was discovered that application of amelogenin to diseased periodontal tissue surfaces enhanced the regeneration of all the periodontal tissues. Additionally, low molecular mass amelogenin polypeptides have also been thought to possess osteogenic potential. Recent data regarding usage of immunohistochemical markers for mesenchymal stem cells suggested that amelogenin has the capacity to induce the recruitment of mesenchymal stem cells directly or indirectly during regeneration of the supporting periodontal tissues. Thus, our current concepts of dental enamel formation should be reviewed thoroughly so that this information could be applied to clinical circumstances where this understanding may be particularly relevant.
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Affiliation(s)
- Ajay Kumar Bansal
- Department of Oral and Maxillofacial Pathology and Microbiology, I.T.S Centre for Dental Studies and Research, Muradnagar, Ghaziabad, Uttar Pradesh, India
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18
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Laugel-Haushalter V, Langer A, Marrie J, Fraulob V, Schuhbaur B, Koch-Phillips M, Dollé P, Bloch-Zupan A. From the transcription of genes involved in ectodermal dysplasias to the understanding of associated dental anomalies. Mol Syndromol 2012; 3:158-68. [PMID: 23239958 DOI: 10.1159/000342833] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/07/2012] [Indexed: 01/17/2023] Open
Abstract
Orodental anomalies are one aspect of rare diseases and are increasingly identified as diagnostic and predictive traits. To understand the rationale behind gene expression during tooth or other ectodermal derivative development and the disruption of odontogenesis or hair and salivary gland formation in human syndromes we analyzed the expression patterns of a set of genes (Irf6, Nfkbia, Ercc3, Evc2, Map2k1) involved in human ectodermal dysplasias in mouse by in situ hybridization. The expression patterns of Nfkbia, Ercc3 and Evc2 during odontogenesis had never been reported previously. All genes were indeed transcribed in different tissues/organs of ectodermal origin. However, for Nfkbia, Ercc3, Evc2, and Map2k1, signals were also present in the ectomesenchymal components of the tooth germs. These expression patterns were consistent in timing and localization with the known dental anomalies (tooth agenesis, microdontia, conical shape, enamel hypoplasia) encountered in syndromes resulting from mutations in those genes. They could also explain the similar orodental anomalies encountered in some of the corresponding mutant mouse models. Translational approaches in development and medicine are relevant to gain understanding of the molecular events underlying clinical manifestations.
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Affiliation(s)
- V Laugel-Haushalter
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Centre National de la Recherche Scientifique (UMR 7104), Institut National de la Santé et de la Recherche Médicale (U 964), Université de Strasbourg, Illkirch, Strasbourg, France
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19
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Clinical and radiological profile of ameloblastic fibro-odontoma: an update on an uncommon odontogenic tumor based on a critical analysis of 114 cases. Head Neck Pathol 2012; 7:54-63. [PMID: 23001451 PMCID: PMC3597150 DOI: 10.1007/s12105-012-0397-9] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2012] [Accepted: 09/05/2012] [Indexed: 12/27/2022]
Abstract
Ameloblastic fibro-odontoma is an uncommon benign tumor of the jaws that belongs to the group of mixed odontogenic tumors. The descriptions of its clinical and radiological features in the literature are not always accurate and sometimes even contradictory. The aim of the present study was to critically evaluate their clinical and radiological features as reported in the English-language literature. A total of 114 well-documented cases of ameloblastic fibro-odontomas (103 from publications and 11 of our own new cases) were analyzed. The patients' age ranged from 8 months to 26 years (mean 9.6). There were 74 (65 %) males, with a male-to-female ratio of 1.85:1 (P = 0.001). The mandible was involved in 74 (65 %) cases, and the mandible-to-maxilla ratio was 1.85:1 (P < 0.001). Nearly 80 % of the lesions were located in the posterior region of the jaws, and most (58 %) were in the posterior mandible. Radiographically, most of the lesions were unilocular and only a few (~10 %) were multilocular. Most lesions were mixed radiolucent-radiopaque, and only a few (~5 %) were radiolucent. Almost all lesions (~92 %) were associated with the crown of an unerupted tooth/teeth. This comprehensive analysis of a large number of patients with an uncommon lesion revealed that ameloblastic fibro-odontomas are significantly more common in males and in the mandible, and that multilocular lesions are uncommon. It also revealed that, based on their clinical and radiological features, some of them are probably true neoplasms while others appear to be developing odontomas (hamartomas).
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Modolo F, Biz MT, de Sousa SM, Fachinelli RDL, Crema VO. Immunohistochemical expression of Rho GTPases in ameloblastomas. J Oral Pathol Med 2011; 41:400-7. [PMID: 22092654 DOI: 10.1111/j.1600-0714.2011.01108.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Rho GTPases are proteins that regulate cell cycle, shape, polarization, invasion, migration, and apoptosis, which are important characteristics of normal and neoplastic cells. Rho GTPases expression has been reported in normal tooth germ and several pathologies; however, it has not been evaluated in ameloblastomas. The aim of this study was to analyze the expression and distribution of RhoA, RhoB, Rac1, and Cdc42 Rho GTPases in solid and unicystic ameloblastomas. Three-micrometer sections from paraffin-embedded specimens were evaluated by using an avidin-biotin immunohistochemical method with antibodies against the proteins mentioned above. RhoA and RhoB staining was observed in a high number of cells (P < 0.05) and greater intensity in non-polarized ones. Rac1 was not observed, and Cdc42 did not show any statistical differences between the number of non-polarized and basal positive cells (P > 0.05). Upon comparing the studied ameloblastomas, a higher number of positive cells in the unicystic variant was observed than that in the solid one (P < 0,05). The results obtained suggest that these GTPases could play a role in the ameloblastoma neoplastic epithelial cell phenotype determination (polarized or non-polarized), as well as in variant (solid or unicystic) and subtype (follicular or plexiform) determination. Furthermore, they could participate in solid ameloblastoma invasion mechanisms.
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Affiliation(s)
- Filipe Modolo
- Pathology Department, Federal University of Santa Catarina, Florianopolis, SC, Brazil.
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21
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Galvão CF, Gomes CC, Diniz MG, Vargas PA, de Paula AMB, Mosqueda-Taylor A, Loyola AM, Gomez RS. Loss of heterozygosity (LOH) in tumour suppressor genes in benign and malignant mixed odontogenic tumours. J Oral Pathol Med 2011; 41:389-93. [PMID: 22082131 DOI: 10.1111/j.1600-0714.2011.01115.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Although molecular alterations are reported in different types of odontogenic tumours, their pathogenesis remains to be established. Loss of heterozygosity (LOH) studies allow the identification of minimal regions of deletions of known or putative tumour suppressor genes, the losses of which may promote neoplastic growth. The purpose of this study was to investigate LOH in a set of odontogenic mixed tumours. Tumour suppressor gene loci on 3p, 9p, 11p, 11q and 17p chromosomes were analysed in five samples of ameloblastic fibroma (AF), three samples of ameloblastic fibro-odontoma (AFO) and three samples of ameloblastic fibrosarcoma (AFS). The most frequently lost genetic loci were p53 (17p13, 62%) and CHRNB1 (17p13, 55%). LOH at the chromosome regions 3p24.3, 9p22 and 9p22-p21 was identified only in AFS. No sample showed LOH at the chromosomal loci 3p21.2 and 11q13.4. For the region 9p22-p13, LOH occurred in one sample of AFO. The fractional allelic loss (FAL) was calculated for each sample. The mean FAL of the benign lesions (i.e. AF and AFO) was 22%, whereas the mean FAL of the malignant lesions (i.e. AFS) was 74.6%. In conclusion, our results show a higher FAL in AFS compared to its benign counterparts and reveal a different pattern of LOH of tumour suppressor genes in AFS, which may regulate changes in tumour behaviour.
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Affiliation(s)
- Clarice F Galvão
- Department of Oral Surgery and Pathology, School of Dentistry, Universidade Federal de Minas Gerais, Brazil
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22
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Salmela E, Alaluusua S, Sahlberg C, Lukinmaa PL. Tributyltin alters osteocalcin, matrix metalloproteinase 20 and dentin sialophosphoprotein gene expression in mineralizing mouse embryonic tooth in vitro. Cells Tissues Organs 2011; 195:287-95. [PMID: 21778681 DOI: 10.1159/000327529] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/08/2011] [Indexed: 02/05/2023] Open
Abstract
We showed in a previous in vitro study that tributyltin (TBT) arrests dentin mineralization and enamel formation in developing mouse tooth. The present aim was to investigate the effect of TBT on the expression of genes associated with mineralization of dental hard tissues. Embryonic day 18 mouse mandibular first molars were cultured for 3, 5 or 7 days and exposed to 1.0 μM TBT and studied by real-time quantitative polymerase chain reaction (RT-QPCR) for the expressions of osteocalcin (Ocn), alkaline phosphatase (Alpl), dentin matrix protein 1 (Dmp1), dentin sialophosphoprotein (Dspp) and matrix metalloproteinase 20 (Mmp-20).Ocn, Mmp-20 and Dspp, whose expressions showed changes in RT- QPCR, were further analyzed by in situ hybridization of tissue sections. In situ hybridization showed that TBT decreased Ocn expression in odontoblasts but increased the expression in the epithelial tooth compartment. In QPCR assays, the net effect in the whole tooth was increased expression. TBT also reduced Mmp-20 expression in ameloblasts and odontoblasts. Dspp expression varied but both QPCR assays and in situ hybridization showed a decreasing trend. TBT exposure had no clear effect on Alpl and Dmp1 expressions. Increased Ocn expression by epithelial enamel organ may inhibit dentin mineralization and enamel formation. Decreased Ocn, Mmp-20 and Dspp expressions in odontoblasts may indicate delayed cell differentiation, or TBT may specifically decrease the expression of genes involved in dentin mineralization. While decreased Mmp-20 expression by TBT in ameloblasts may impair enamel mineralization, the coincident reduction in Mmp-20 and Dspp expressions in odontoblasts may potentiate the delay of dentin mineralization.
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Affiliation(s)
- Eija Salmela
- Department of Pediatric and Preventive Dentistry, Institute of Dentistry, University of Helsinki, Helsinki, Finland.
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23
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Satish V, Prabhadevi MC, Sharma R. Odontome: A Brief Overview. Int J Clin Pediatr Dent 2011; 4:177-85. [PMID: 27678223 PMCID: PMC5034075 DOI: 10.5005/jp-journals-10005-1106] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2011] [Accepted: 04/15/2011] [Indexed: 11/28/2022] Open
Abstract
Odontomas are the most common type of odontogenic tumors. They are included under the benign calcified odontogenic tumors. Odontomas are basically classified into two types, complex and compound odontomes. Various theories or etiological factors are been quoted for the occurrence of odontomes. Generally, they are asymptomatic. Occasionally, signs and symptoms relating to their presence do occur. The sole management depends upon the early diagnosis, histopathological examination and excision of these tissues. This article briefs regarding its classification, etiological factors, occurrence, differences between complex and compound odontomes, diagnosis and management.
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Affiliation(s)
- V Satish
- Associate Professor, Department of Pedodontics and Preventive Dentistry, Jaipur Dental College, Jaipur, Rajasthan, India
| | - Maganur C Prabhadevi
- Reader, Department of Pedodontics and Preventive Dentistry, Jaipur Dental College, Jaipur, Rajasthan, India
| | - Rajesh Sharma
- Professor, Department of Pedodontics and Preventive Dentistry, Jaipur Dental College, Jaipur, Rajasthan, India
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Sonone A, Hande A, Chaudhary M, Bonde R, Sheorain A, Agni N. Adenoid ameloblastoma with dentinoid and ghost cells. A composite odontogenic tumour: a rare case report and review of the literature. ACTA ACUST UNITED AC 2011. [DOI: 10.1111/j.1752-248x.2010.01109.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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25
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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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26
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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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27
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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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28
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Ruhin-Poncet B, Ghoul-Mazgar S, Hotton D, Capron F, Jaafoura MH, Goubin G, Berdal A. Msx and dlx homeogene expression in epithelial odontogenic tumors. J Histochem Cytochem 2008; 57:69-78. [PMID: 18854600 DOI: 10.1369/jhc.2008.951707] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Epithelial odontogenic tumors are rare jaw pathologies that raise clinical diagnosis and prognosis dilemmas notably between ameloblastomas and clear cell odontogenic carcinomas (CCOCs). In line with previous studies, the molecular determinants of tooth development-amelogenin, Msx1, Msx2, Dlx2, Dlx3, Bmp2, and Bmp4-were analyzed by RT-PCR, ISH, and immunolabeling in 12 recurrent ameloblastomas and in one case of CCOC. Although Msx1 expression imitates normal cell differentiation in these tumors, other genes showed a distinct pattern depending on the type of tumor and the tissue involved. In benign ameloblastomas, ISH localized Dlx3 transcripts and inconstantly detected Msx2 transcripts in epithelial cells. In the CCOC, ISH established a lack of both Dlx3 and Msx2 transcripts but allowed identification of the antisense transcript of Msx1, which imitates the same scheme of distribution between mesenchyme and epithelium as in the cup stage of tooth development. Furthermore, while exploring the expression pattern of signal molecules by RT-PCR, Bmp2 was shown to be completely inactivated in the CCOC and irregularly noticeable in ameloblastomas. Bmp4 was always expressed in all the tumors. Based on the established roles of Msx and Dlx transcription factors in dental cell fates, these data suggest that their altered expression is a proposed trail to explain the genesis and/or the progression of odontogenic tumors.
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Affiliation(s)
- Blandine Ruhin-Poncet
- Laboratory of Orofacial Biology and Pathology-Centre de Recherche des Cordeliers, INSERM, UMR S 872, Team 5, Pierre and Marie Curie University, Paris, France
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29
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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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30
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Hu Y, Papagerakis P, Ye L, Feng JQ, Simmer JP, Hu JCC. Distal cis-regulatory elements are required for tissue-specific expression of enamelin (Enam). Eur J Oral Sci 2008; 116:113-23. [PMID: 18353004 DOI: 10.1111/j.1600-0722.2007.00519.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Enamel formation is orchestrated by the sequential expression of genes encoding enamel matrix proteins; however, the mechanisms sustaining the spatio-temporal order of gene transcription during amelogenesis are poorly understood. The aim of this study was to characterize the cis-regulatory sequences necessary for normal expression of enamelin (Enam). Several enamelin transcription regulatory regions, showing high sequence homology among species, were identified. DNA constructs containing 5.2 or 3.9 kb regions upstream of the enamelin translation initiation site were linked to a LacZ reporter and used to generate transgenic mice. Only the 5.2-Enam-LacZ construct was sufficient to recapitulate the endogenous pattern of enamelin tooth-specific expression. The 3.9-Enam-LacZ transgenic lines showed no expression in dental cells, but ectopic beta-galactosidase activity was detected in osteoblasts. Potential transcription factor-binding sites were identified that may be important in controlling enamelin basal promoter activity and in conferring enamelin tissue-specific expression. Our study provides new insights into regulatory mechanisms governing enamelin expression.
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Affiliation(s)
- Yuanyuan Hu
- Department of Orthodontics and Pediatric Dentistry, University of Michigan School of Dentistry, Ann Arbor, MI 48108, USA
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31
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Bloch-Zupan A. Genetische Störungen der Zahnentwicklung und Dentition. MED GENET-BERLIN 2007. [DOI: 10.1007/s11825-007-0050-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Zusammenfassung
Die Zähne sind Organe, die aus ektodermalen epithelialen Aussackungen im Bereich des 1. Kiemenbogens entstehen, gesteuert von epitheliomesenchymalen Interaktionen. Dabei spielen zahlreiche Signalmoleküle speziell der 4 großen Familien TGF-β, FGF, Hedgehog und WNT sowie diverse Transkriptionsfaktoren eine Rolle. Eine Beteiligung der Retinoide an der Odontogenese ist durch umfangreiche Befunde belegt, auch wenn die Inaktivierung relevanter Gene in Mausmodellen meist keine Zahnanomalien verursacht. Die Zahnentwicklung wird klassischerweise in verschiedene Stadien eingeteilt: Entstehung der Zahnleiste, der Zahnknospe, der Schmelzkappe, der Schmelzglocke, die Wurzelbildung und der Zahndurchbruch. Anomalien der Zahnentwicklung können isoliert oder gemeinsam mit anderen Symptomen im Zusammenhang mit Syndromen auftreten. Sie können genetisch bedingt sein oder unter Einwirkung teratogener Stoffe während der Bildung und Mineralisierung der Zahnkeime zustande kommen. Dentibukkale Entwicklungsanomalien treten im Kontext seltener Erkrankungen auf und finden zunehmend Beachtung, da sie bei bestimmten Erkrankungen in der Diagnostik und als prädikative Faktoren wichtige Anhaltspunkte geben können. Allerdings ist hierfür eine interdisziplinäre und internationale Kooperation notwendig, die bislang erst in Ansätzen verwirklicht wurde.
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Affiliation(s)
- A. Bloch-Zupan
- Aff1_50 Faculté de Chirurgie Dentaire, Université Louis Pasteur, Centre de référence des manifestations odontologiques des maladies rares, Service de Soins Bucco-Dentaires Centre Hospitalier Universitaire, Hopital Civil 1 Place de l’Hopital 67000 Strasbourg Cedex France
- Aff2_50 grid.420255.4 0000000406382716 Département Génétique et Physiologie IGBMC (Institut de Génétique et de Biologie Moléculaire et Cellulaire), Inserm, U596 CNRS, UMR7104 67400 Illkirch France
- Aff3_50 grid.83440.3b 0000000121901201 Eastman Dental Institute Institute of Child Health, University College London UK
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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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33
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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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34
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Dodds AP, Cannon RE, Suggs CA, Wright JT. mRNA expression and phenotype of odontogenic tumours in the v-Ha-ras transgenic mouse. Arch Oral Biol 2004; 48:843-50. [PMID: 14596874 DOI: 10.1016/s0003-9969(03)00178-x] [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] [Indexed: 10/27/2022]
Abstract
UNLABELLED Ameloblastomas are the most common odontogenic neoplasia in humans, and although typically considered locally invasive and benign, frequently recur subsequent to surgical resection. The Tg.AC transgenic mouse carrying the v-Ha-ras oncogene has been found to spontaneously develop ameloblastoma-like tumours (35% by 1 year of age) that are rare in the wild type FVB background strain. OBJECTIVE The purpose of this study was to characterise the mRNA expression of genes in the mouse tumours that are either expressed in human ameloblastomas or essential for normal odontogenesis and to correlate the expression to the histological phenotype. STUDY METHODS Histological, immunohistochemical and RT-PCR studies were used to evaluate clinically demonstrable odontogenic tumours occurring spontaneously in seven Tg.AC v-Ha-ras transgenic mice (homozygous, at 7 months of age or heterozygous at 11 months of age). RESULTS Most genes profiled were expressed in all tumour samples, however three (amelogenin, matrix metalloproteinase-20 (MMP-20) and Dlx7) displayed differential expression. In addition, only the most highly differentiated tumour stained positively for collagen. In most cases, the variable expression could be explained by reference to the histological phenotype, although differences in gene expression were apparent within the Type 2 and the mixed phenotype tumours. CONCLUSIONS These data confirm that many of the genes thought to be important in odontogenesis and odontogenic tumour formation in humans are also expressed in these murine ameloblastoma-like tumours however genes associated with terminal differentiation of ameloblasts demonstrate differential expression between the tumour phenotypes.
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Affiliation(s)
- A P Dodds
- Department Pediatric Dentistry, UNC School of Dentistry, University of North Carolina at Chapel Hill, Manning Drive, Chapel Hill, NC 27599, USA.
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35
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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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36
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Abstract
Teeth are highly refined structures formed by several types of specialised cell. Tooth formation embraces many areas of biomedical interest, including cellular mechanisms for calcium handling, protein secretion and mineralised tissue production. Proteomics offers great potential to elucidate these cellular roles, and to establish their relevance to general cell types. Here we review our proteomic investigations of dental enamel formation, covering both the approaches taken and some findings of general biomedical relevance.
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Affiliation(s)
- Michael J Hubbard
- Department of Biochemistry, University of Otago, Dunedin, New Zealand.
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37
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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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38
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Coleman H, Altini M, Ali H, Doglioni C, Favia G, Maiorano E. Use of calretinin in the differential diagnosis of unicystic ameloblastomas. Histopathology 2001; 38:312-7. [PMID: 11318896 DOI: 10.1046/j.1365-2559.2001.01100.x] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
AIMS Calretinin, a 29-kDa calcium-binding protein is expressed widely in normal human tissues and tumours including both unicystic and solid and multicystic ameloblastomas. The histological distinction between unicystic ameloblastomas and certain non-neoplastic odontogenic cysts can be problematic. The objective of this study was to determine whether calretinin was expressed in the lining epithelium of odontogenic keratocysts, residual and dentigerous cysts and to determine whether this calcium-binding protein could be used to distinguish these cysts from the unicystic ameloblastoma. METHODS AND RESULTS The lining epithelium in 22 cases of odontogenic keratocyst, 26 cases of residual cyst and 20 cases of dentigerous cyst were examined for the expression of calretinin. No positive epithelial staining was observed in any of these cystic lesions. In comparison, however, 81.5% of cases of unicystic ameloblastoma showed a coarse dark brown staining of the more superficial epithelial cell layers. Scattered positive stromal and epithelial cells were present; these were interpreted as mast cells. CONCLUSIONS Calretinin appears to be a specific immunohistochemical marker for neoplastic ameloblastic epithelium and we suggest that it may be an important diagnostic aid in the differential diagnosis of cystic odontogenic lesions and ameloblastic tumours.
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Affiliation(s)
- H Coleman
- Division of Oral Pathology, Department of Anatomical Pathology, University of the Witwatersrand, Johannesburg, South Africa.
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39
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Matsuzaka K, Inoue T, Nashimoto M, Takemoto K, Ishikawa H, Asaka M, Shimono M, Fujikawa M, Noma H. A case of an ameloblastic fibro-odontoma arising from a calcifying odontogenic cyst. THE BULLETIN OF TOKYO DENTAL COLLEGE 2001; 42:51-5. [PMID: 11484795 DOI: 10.2209/tdcpublication.42.51] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
This case report describes an ameloblastic fibro-odontoma arising from a calcifying odontogenic cyst (COC) in the mandible of a twenty-three-year old male. The patient was referred to the Department of Oral Surgery, Tokyo Dental College, on March 30th, 2000, complaining of a painful swelling, which had appeared three weeks earlier on his left mandibular molar region. In a pathological view, the lesion was a round cyst the size of a chicken-egg, dark red in color, and surrounded by a thick membrane. The cyst had an epithelium of varying thickness which included many ghost cells and an enamel-like structure on the inside, and a thick wall of connective tissue with an ameloblastic fibro-odontoma on the outside. Enamel organ-like epithelial islands were structured radially in the form of strands with immature dentin. Cytokeratin 19 was strongly immunoreactive in the epithelium of the lesion; osteopontin and osteocalcin reacted in the mesenchymal cells and weakly in the epithelial element of this tumor.
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Affiliation(s)
- K Matsuzaka
- Oral Health Science Center, Department of Pathology, Tokyo Dental College, Chiba, Japan
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40
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Ide F, Horie N, Shimoyama T, Sakashita H, Kusama K. So-called Hybrid Odontogenic Tumors: Do they really exist? ACTA ACUST UNITED AC 2001. [DOI: 10.3353/omp.6.13] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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41
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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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42
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Josephsen K, Smith CE, Nanci A. Selective but nonspecific immunolabeling of enamel protein-associated compartments by a monoclonal antibody against vimentin. J Histochem Cytochem 1999; 47:1237-45. [PMID: 10490452 DOI: 10.1177/002215549904701003] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Vimentin, an intermediate filament component, has been identified in many mesenchymal cells by a variety of LM and EM immunolabeling techniques. In our study, several tissue-processing conditions and monoclonal and polyclonal antibodies against vimentin were screened for immunostaining of rat incisor odontoblasts. Using postembedding colloidal gold immunocytochemistry, we were unable to detect any convincing vimentin antigenicity in these cells, but one of the monoclonal antibodies (V9-S) unexpectedly resulted in intense labeling over intra- and extracellular compartments that normally are strongly immunoreactive with anti-amelogenin antibodies. Blocking experiments showed that V9-S binding was competed by anti-amelogenin antibody. Immunoblots indicated that enamel proteins reacted with this anti-vimentin antibody after fixation with glutaraldehyde. These data suggest that the observed immunoreaction is directed against an epitope apparently created by crosslinking of enamel proteins during fixation. Although the labeling cannot be considered specific, it is nevertheless selective because it is very precisely localized over compartments containing enamel proteins and shows no binding to other calcified dental tissues, including dentin and bone. The V9-S antibody can therefore be used as a reliable probe to identify the presence and distribution of amelogenins in fixed tissues. (J Histochem Cytochem 47:1237-1245, 1999)
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Affiliation(s)
- K Josephsen
- Department of Dental Pathology, Operative Dentistry and Endodontics, Royal Dental College, Faculty of Health Sciences, University of Aarhus, Aarhus, Denmark
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