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Evangelou Z, Zarachi A, Dumollard JM, Peoc'h M, Komnos I, Kastanioudakis I, Karpathiou G. Maxillary Ameloblastoma: A Review With Clinical, Histological and Prognostic Data of a Rare Tumor. In Vivo 2021; 34:2249-2258. [PMID: 32871747 DOI: 10.21873/invivo.12035] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 07/07/2020] [Accepted: 07/09/2020] [Indexed: 01/05/2023]
Abstract
Diagnosis of odontogenic tumors can be challenging due to their rarity and diverse morphology, but when arising near the tooth, the diagnosis could be suspected. When their location is not typical, like inside the paranasal sinuses, the diagnosis is less easy. Maxillary ameloblastomas are exceedingly rare with only sparse information on their epidemiological, histological and genetic characteristics. The aim of this report is to thoroughly review the available literature in order to present the characteristics of this tumor. According to available data, maxillary ameloblastomas can occur in all ages but later than mandible ones, and everywhere within the maxillary region without necessarily having direct contact with the teeth. No sex preference has been shown. The most common histological patterns seen in this location are the follicular and plexiform ones. Maxillary ameloblastomas are locally aggressive neoplasms, thus therapy aims for excision including normal bone beyond the lesion. In contrast to mandible ameloblastomas, maxillary ones most commonly show mutations of the SMO gene. Furthermore, differential tumor diagnosis is thoroughly discussed in the present review.
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Affiliation(s)
- Zoi Evangelou
- Department of Pathology and Otorhinolaryngology, University Hospital of Ioannina, Ioannina, Greece
| | - Athina Zarachi
- Department of Head and Neck Surgery, University Hospital of Ioannina, Ioannina, Greece
| | - Jean Marc Dumollard
- Department of Pathology, University Hospital of Saint-Etienne, Saint-Etienne, France
| | - Michel Peoc'h
- Department of Pathology, University Hospital of Saint-Etienne, Saint-Etienne, France
| | - Ioannis Komnos
- Department of Head and Neck Surgery, University Hospital of Ioannina, Ioannina, Greece
| | | | - Georgia Karpathiou
- Department of Pathology and Otorhinolaryngology, University Hospital of Ioannina, Ioannina, Greece .,Department of Pathology, University Hospital of Saint-Etienne, Saint-Etienne, France
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The monoclonal antibody EPR1614Y against the stem cell biomarker keratin K15 lacks specificity and reacts with other keratins. Sci Rep 2019; 9:1943. [PMID: 30760780 PMCID: PMC6374370 DOI: 10.1038/s41598-018-38163-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Accepted: 12/20/2018] [Indexed: 12/17/2022] Open
Abstract
Keratin 15 (K15), a type I keratin, which pairs with K5 in epidermis, has been used extensively as a biomarker for stem cells. Two commercial antibodies, LHK15, a mouse monoclonal and EPR1614Y, a rabbit monoclonal, have been widely employed to study K15 expression. Here we report differential reactivity of these antibodies on epithelial cells and tissue sections. Although the two antibodies specifically recognised K15 on western blot, they reacted differently on skin sections and cell lines. LHK15 reacted in patches, whereas EPR1614Y reacted homogenously with the basal keratinocytes in skin sections. In cultured cells, LHK15 did not react with K15 deficient NEB-1, KEB-11, MCF-7 and SW13 cells expressing only exogenous K8 and K18 but reacted when these cells were transduced with K15. On the other hand, EPR1614Y reacted with these cells even though they were devoid of K15. Taken together these results suggest that EPR1614Y recognises a conformational epitope on keratin filaments which can be reconstituted by other keratins as well as by K15. In conclusion, this report highlights that all commercially available antibodies may not be equally specific in identifying the K15 positive stem cell.
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Alsaegh MA, Altaie AM, Zhu S. Expression of keratin 15 in dentigerous cyst, odontogenic keratocyst and ameloblastoma. Mol Clin Oncol 2019; 10:377-381. [PMID: 30847177 DOI: 10.3892/mco.2019.1802] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Accepted: 01/15/2019] [Indexed: 02/01/2023] Open
Abstract
The etiology and pathogenesis of odontogenic lesions are poorly understood. Keratin 15 (K15) is a type I cytoskeletal protein that provides structural support to the cells and has been considered to be a stem cell marker. The aim of the present study was to evaluate the expression of K15 in the epithelial lining of dentigerous cysts (DCs), odontogenic keratocysts (OKCs) and ameloblastomas (ABs). The study included 41 samples of DCs (n=13), OKCs (n=12), and AB tissues (n=16). K15 protein expression was evaluated via immunohistochemistry and data were statistically analyzed using a Kruskal-Wallis test. K15 was expressed in the majority of the studied lesions with various distributions in the different study samples. The Kruskal-Wallis test revealed non-significant differences in the expression of K15 among the three odontogenic lesions (P=0.380). The present study confirmed the high expression of K15 in the different epithelial layers of DC, OKC and AB. This type of expression excludes the reliability of regarding K15 as a stem cell marker in DC, OKC and AB. However, K15 may reflect the abnormal differentiation of pathological epithelial cells in these lesions.
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Affiliation(s)
- Mohammed Amjed Alsaegh
- Department of Oral and Maxillofacial Surgery, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China.,Department of Oral and Maxillofacial Surgery, College of Dentistry, Ajman University, Fujairah Campus, Al-Hulifat, Fujairah 2202, United Arab Emirates
| | - Alaa Muayad Altaie
- Sharjah Medical Research Institute, Medical College, Sharjah University, Sharjah 27272, United Arab Emirates
| | - Shengrong Zhu
- Department of Oral and Maxillofacial Surgery, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China
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Expression of cytokeratin 14, cytokeratin 19 and E-Cadherin in ameloblastoma correlates with the cytodifferentiation of enamel organ. JOURNAL OF ORAL AND MAXILLOFACIAL SURGERY, MEDICINE, AND PATHOLOGY 2018. [DOI: 10.1016/j.ajoms.2017.12.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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do Canto AM, Rozatto JR, Schussel JL, de Freitas RR, Hasséus B, Braz-Silva PH. Immunohistochemical biomarkers in ameloblastomas. Acta Odontol Scand 2016; 74:585-590. [PMID: 27571891 DOI: 10.1080/00016357.2016.1224918] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Ameloblastoma is an aggressive odontogenic tumour, which is locally invasive and highly recurrent. Studies show that ameloblastoma is a benign odontogenic neoplasia, being relatively rare and occasionally presenting behaviour of malignant lesions. In addition to these particularities, the histological diagnosis of ameloblastoma can be challenging when the tumour shows high rates of mitosis, absence of nuclear pleomorphism, basilar hyperplasia and neural invasion. In order to help in the diagnosis, prognosis and treatment of this neoplasia, some immunohistochemical markers were shown to be associated with tumoural epithelium. The identification of these markers as well as of their association with clinical signs can be useful to elaborate more efficient treatment strategies and to control this pathology, including improvement of the quality of life of patients affected by this neoplasia. This article aims to review some markers associated with specific molecular pathways, bone remodelling, cell proliferation, apoptosis, cell signalling and tumour suppression.
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Neves-Silva R, Fonseca FP, de Jesus AS, Pontes HAR, Rocha AC, Brandão TB, Vargas PA, Lopes MA, de Almeida OP, Santos-Silva AR. Tissue microarray use for immunohistochemical study of ameloblastoma. J Oral Pathol Med 2016; 45:704-711. [DOI: 10.1111/jop.12428] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/04/2016] [Indexed: 01/18/2023]
Affiliation(s)
- Rodrigo Neves-Silva
- Oral Diagnosis Department, Semiology and Pathology; Piracicaba Dental School; University of Campinas (UNICAMP); Piracicaba São Paulo Brazil
| | - Felipe Paiva Fonseca
- Oral Diagnosis Department, Semiology and Pathology; Piracicaba Dental School; University of Campinas (UNICAMP); Piracicaba São Paulo Brazil
| | - Adriana Souza de Jesus
- Service of Oral Pathology; João de Barros Barreto University Hospital; Federal University of Pará; Belém Pará Brazil
| | - Hélder Antônio Rebelo Pontes
- Service of Oral Pathology; João de Barros Barreto University Hospital; Federal University of Pará; Belém Pará Brazil
| | - André Caroli Rocha
- Medical School; Clinics Hospital; University of São Paulo; São Paulo São Paulo Brazil
| | - Thais Bianca Brandão
- Oral Diagnosis Department, Semiology and Pathology; Piracicaba Dental School; University of Campinas (UNICAMP); Piracicaba São Paulo Brazil
| | - Pablo Agustin Vargas
- Oral Diagnosis Department, Semiology and Pathology; Piracicaba Dental School; University of Campinas (UNICAMP); Piracicaba São Paulo Brazil
- Department of Oral Pathology and Oral Biology; School of Dentistry; Faculty of Health Sciences; University of Pretoria; Pretoria South Africa
| | - Márcio Ajudarte Lopes
- Oral Diagnosis Department, Semiology and Pathology; Piracicaba Dental School; University of Campinas (UNICAMP); Piracicaba São Paulo Brazil
| | - Oslei Paes de Almeida
- Oral Diagnosis Department, Semiology and Pathology; Piracicaba Dental School; University of Campinas (UNICAMP); Piracicaba São Paulo Brazil
| | - Alan Roger Santos-Silva
- Oral Diagnosis Department, Semiology and Pathology; Piracicaba Dental School; University of Campinas (UNICAMP); Piracicaba São Paulo Brazil
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Adenoid ameloblastoma: clinicopathologic description of five cases and systematic review of the current knowledge. Oral Surg Oral Med Oral Pathol Oral Radiol 2015; 120:368-77. [PMID: 26297394 DOI: 10.1016/j.oooo.2015.05.011] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Revised: 05/16/2015] [Accepted: 05/21/2015] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To describe the clinicopathologic and immunohistochemical features of five cases of adenoid ameloblastoma. STUDY DESIGN Clinicopathologic data were gathered from medical records and compared with those compiled from a systematic review. Slides were also immunohistochemically stained for Ki-67, p16, p53, and cytokeratins (7, 8, 14, 18, and 19). RESULTS There were 3 males (60%) and 2 (40%) females. The mean age was 44 ± 10 years. Of the five adenoid ameloblastomas, 4 (80%) occurred in the posterior maxilla. Patients typically complained of asymptomatic swelling. All patients received surgical resection as primary therapy; 1 (20%) patient also received adjuvant radiotherapy. Recurrence was diagnosed in all patients. Immunohistochemically, the tumors stained focally positive for CK7, 8, 14, and 18 and diffusely positive for CK-19, p16, and p53. The mean Ki-67-positive cells were 72.4 ± 24.9 positive cells per high-power field (range 53-111). CONCLUSIONS To our knowledge, this is the largest series of adenoid ameloblastoma reported in the literature. Our data suggest that this entity demonstrates aggressive behavior characterized by a high likelihood of recurrence.
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Hunter KD, Speight PM. The diagnostic usefulness of immunohistochemistry for odontogenic lesions. Head Neck Pathol 2014; 8:392-9. [PMID: 25409846 PMCID: PMC4245415 DOI: 10.1007/s12105-014-0582-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Accepted: 10/30/2014] [Indexed: 10/24/2022]
Abstract
The diagnosis of odontogenic tumors can be challenging, largely due to their rarity and consequent difficulties in gaining experience in their assessment. In most cases, careful attention to morphology, in conjunction with clinical and radiological features will allow a diagnosis to be made. However, in some cases, immunohistochemical analysis of the tumor may be useful. In this review we will outline the immunohistochemical expression profile of normal developing odontogenic tissues and a range of odontogenic tumors. In many cases the immunohistochemical markers are neither specific nor sensitive enough to be of help in diagnosis, but in some cases such analysis may prove very useful. Thus we have outlined a limited number of circumstances where immunohistochemistry may be of use to the practicing diagnostic pathologist.
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Affiliation(s)
- Keith D. Hunter
- grid.11835.3e0000000419369262Unit of Oral and Maxillofacial Pathology, School of Clinical Dentistry, University of Sheffield, Claremont Crescent, Sheffield, S10 2TA UK
| | - Paul M. Speight
- grid.11835.3e0000000419369262Unit of Oral and Maxillofacial Pathology, School of Clinical Dentistry, University of Sheffield, Claremont Crescent, Sheffield, S10 2TA UK
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EGFR signaling downstream of EGF regulates migration, invasion, and MMP secretion of immortalized cells derived from human ameloblastoma. Tumour Biol 2014; 35:11107-20. [PMID: 25099616 DOI: 10.1007/s13277-014-2401-3] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Accepted: 07/23/2014] [Indexed: 12/12/2022] Open
Abstract
Ameloblastoma is an odontogenic tumor characterized by local invasiveness and frequent recurrence. The surrounding stroma, composed of different cell types and extracellular matrix (ECM), may influence ameloblastoma invasive behavior. Furthermore, tumor and stromal cells secrete matrix metalloproteases (MMPs), which, in turn, can modulate the matrix and promote the release of ECM-bound growth factors. Among these growth factors, epidermal growth factor (EGF) and its receptor, EGFR, have already been shown to stimulate MMP synthesis, suggesting that an interdependent mechanism, involving MMP activity and growth factors release, may contribute to tumor invasiveness. The aim of this study was to evaluate the effects of the EGF/EGFR signaling pathway on migration, invasion, and MMP activity, in a primary cell line derived from human ameloblastoma. We established and characterized a primary cell line (AME-1) from a human ameloblastoma sample. This cell line was transduced with human papillomavirus type 16 (HPV16) E6/E7 oncogenes, generating the AME-HPV continuous cell line. EGF, MMP2, and MMP9 expression in ameloblastoma biopsies and in the AME-HPV cell line was analyzed by immunohistochemistry and immunofluorescence, respectively. Migratory activity of EGF-treated AME-HPV cells was investigated using monolayer wound assays and Transwell chambers. EGF-induced invasion was assessed in Boyden chambers coated with Matrigel. Conditioned medium from EGF-treated cells was subjected to zymography. EGFR expression in AME-HPV cells was silenced by small interfering RNA (siRNA), to verify the relationship between this receptor and MMP secretion. Ameloblastoma samples and AME-HPV cells expressed EGF, EGFR, MMP2, and MMP9. AME-HPV cells treated with EGF showed increased rates of migration and invasion, as well as enhanced MMP2 and MMP9 activity. EGFR knockdown decreased MMP2 and MMP9 levels in AME-HPV cells. EGFR signaling downstream of EGF probably regulates migration, invasion, and MMP secretion of ameloblastoma-derived cells.
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