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Krishnan RP, Pandiar D, Sagar S. Immunohistochemical Expression of CK14 and Bcl-2 in Odontogenic Keratocyst and Its Variants. Appl Immunohistochem Mol Morphol 2024; 32:151-156. [PMID: 38146077 DOI: 10.1097/pai.0000000000001182] [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: 02/08/2023] [Accepted: 12/05/2023] [Indexed: 12/27/2023]
Abstract
Odontogenic keratocysts (OKCs) are aggressive cystic jaw lesions with a high epithelial turnover rate and increased propensity for recurrence. Sometimes, the characteristic histopathological features of OKCs are either completely lost or seen focally due to previous marsupialization or inflammation. This research aimed to determine whether specific patterns of CK14 and Bcl-2 staining could assist in diagnosing OKCs with altered epithelial features and provide clues in elucidating their aggressive nature. CK14 expression was restricted to basal and suprabasal layers near satellite cysts and in areas showing subepithelial split. The entire epithelial lining showed CK14 expression in areas of inflammation and after marsupialization. The typical basal/suprabasal staining of Bcl-2 was lost in areas of inflammation and intensity is decreased in OKCs after marsupialization. These new findings could offer a hint into the biological nature and pathogenesis of OKCs. Because of its therapeutic consequences and high recurrence rate, proper recognition and diagnosis are essential for treatment planning.
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Affiliation(s)
- Reshma Poothakulath Krishnan
- Department of Oral Pathology and Microbiology, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, Tamil Nadu
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Ikezaki S, Otsu K, Kumakami-Sakano M, Harada H. A novel junctional epithelial cell line, mHAT-JE01, derived from incisor epithelial cells. J Oral Biosci 2023; 65:47-54. [PMID: 36693475 DOI: 10.1016/j.job.2023.01.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 01/16/2023] [Accepted: 01/17/2023] [Indexed: 01/22/2023]
Abstract
OBJECTIVES Junctional epithelium (JE) connects the tooth surface and gingival epithelium and adheres directly to the tooth enamel. JE plays an important role as a barrier preventing the invasion of exogenous bacteria and substances. However, the cellular characteristics of this epithelium have not been adequately described, because no useful in vitro experimental model exists for JE. METHODS We generated a novel JE cell line, mHAT-JE01, using naturally immortalized dental epithelium derived from incisor labial cervical cells and by selecting cells that adhered to apatite. mHAT-JE01 was characterized by immunohistochemistry and quantitative reverse transcription-polymerase chain reaction and compared with the gingival epithelial cell line, mOE-PE01. RESULTS The mHAT-JE01 cells had a higher capacity for producing JE-specific markers than oral mucous epithelial cells. In addition, the presence of lipopolysaccharides from Porphyromonas gingivalis downregulated the expression of JE protein markers in mHAT-JE01 cells. CONCLUSIONS This cell line is stable and presents the opportunity to characterize JE efficiently, which is essential for the prevention and treatment of periodontal disease.
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Affiliation(s)
- Shojiro Ikezaki
- Division of Developmental Biology and Regenerative Medicine, Department of Anatomy, Iwate Medical University, 1-1-1, Idaidori, Yahaba, Iwate 028-3694, Japan
| | - Keishi Otsu
- Division of Developmental Biology and Regenerative Medicine, Department of Anatomy, Iwate Medical University, 1-1-1, Idaidori, Yahaba, Iwate 028-3694, Japan
| | - Mika Kumakami-Sakano
- Division of Developmental Biology and Regenerative Medicine, Department of Anatomy, Iwate Medical University, 1-1-1, Idaidori, Yahaba, Iwate 028-3694, Japan
| | - Hidemitsu Harada
- Division of Developmental Biology and Regenerative Medicine, Department of Anatomy, Iwate Medical University, 1-1-1, Idaidori, Yahaba, Iwate 028-3694, Japan.
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Song D, Yang S, Tan T, Wang R, Ma Z, Wang Y, Wang L. ODAM promotes junctional epithelium-related gene expression via activation of WNT1 signaling pathway in an ameloblast-like cell line ALC. J Periodontal Res 2021; 56:482-491. [PMID: 33452817 DOI: 10.1111/jre.12848] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 12/09/2020] [Accepted: 12/22/2020] [Indexed: 12/12/2022]
Abstract
OBJECTIVE In this study, we investigated the potential and mechanism of odontogenic ameloblast-associated protein (ODAM) in the promoting junctional epithelium-related gene expression in an ameloblast-like cell line ALC. BACKGROUND ODAM is expressed in ameloblasts and JE and acts as a component of the inner basal lamina (IBL) and intercellular matrix of JE. ODAM KO mice showed destruction of the integrity of the JE, which detaches from teeth. ODAM was confirmed to regulate the cytoskeleton through the ODAM-ARHGEF5-RhoA signaling pathway of the JE. Whether ODAM contributes to the regulation of ameloblast differentiation in JE remains unclear. After the formation of enamel, the ameloblast undergoes a series of morphological changes. Whether ODAM will affect the biological behavior of ameloblasts making them have the characteristics of JE is unclear. METHODS A murine ameloblast-like cell line, ALC, was used to investigate the effects of ODAM on the JE-like changes of ALC cells in an epithelium-induced environment by generating ODAM overexpression and ODAM knockdown cells through a lentivirus transduction approach. The biomarkers of junctional epithelium CK19, SLPI, and ODAM and the potential regulatory gene WNT1 were investigated by real-time PCR, western blot, immunocytochemistry, immunostaining, luciferase reporter, and rescue assays. RESULTS ODAM, CK19, and SLPI were significantly upregulated after epithelial induction. Overexpression of ODAM in ALC cells markedly increased CK19 and SLPI expression, while knockdown of ODAM in ALC cells clearly decreased CK19 and SLPI expression. A reporter luciferase assay showed that ODAM activated the WNT signaling pathway, especially through WNT1. Exogenous overexpression of ODAM upregulated WNT1 expression, while knockdown of ODAM reversed this effect. The WNT1 inhibition assay further confirmed the above results and showed that the WNT1 pathway was positively correlated with biomarkers of junctional epithelium CK19 and SLPI expression. Rescue studies showed that knocking down WNT1 in the ODAM-overexpressing ALC cells decreased the expression of CK19 and SLPI. Immunocytochemistry showed that ODAM colocalized with CK19, SLPI, and WNT1 in the cells. CONCLUSION In conclusion, the research work showed that ODAM promotes junctional epithelium-related gene expression in ALC via the ODAM-WNT1 axis, which may provide new insight into the function of ODAM and JE formation.
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Affiliation(s)
- Danyang Song
- Department of Prosthodontics, School and Hospital of Stomatology, Peking University, Beijing, China.,National Clinical Research Center for Oral Diseases, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Sui Yang
- Department of Prosthodontics, School and Hospital of Stomatology, Peking University, Beijing, China.,National Clinical Research Center for Oral Diseases, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Tao Tan
- Department of Prosthodontics, School and Hospital of Stomatology, Peking University, Beijing, China.,National Clinical Research Center for Oral Diseases, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Ruijie Wang
- Department of Prosthodontics, School and Hospital of Stomatology, Peking University, Beijing, China.,National Clinical Research Center for Oral Diseases, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Zeyun Ma
- Department of Dental VIP Service, Peking University School and Hospital of Stomatology, Beijing, China
| | - Yixiang Wang
- Central Laboratory, Peking University School and Hospital of Stomatology, Beijing, China
| | - Lei Wang
- Department of Prosthodontics, School and Hospital of Stomatology, Peking University, Beijing, China.,National Clinical Research Center for Oral Diseases, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, China
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Kayamori K, Tsuchiya M, Michi Y, Kuribayashi A, Mikami T, Sakamoto K, Yoda T, Ikeda T. Primordial odontogenic tumor occurred in the maxilla with unique calcifications and its crucial points for differential diagnosis. Pathol Int 2020; 71:80-87. [PMID: 33079412 DOI: 10.1111/pin.13036] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Accepted: 09/25/2020] [Indexed: 11/30/2022]
Abstract
Primordial odontogenic tumor (POT) is a newly classified, mixed epithelial and mesenchymal odontogenic tumor, with only 17 reported cases to date. Herein, we report a case of POT that occurred in the right maxilla of a 10-year-old boy and reveal unique features in comparison with those previously reported. Radiologically, the lesion presented as a well-defined, unilocular radiolucency with notable radiopaque foci on the periphery. Microscopically, the tumor was mainly composed of dental papilla-like myxoid fibrous connective tissue, largely surrounded by non-keratinized squamous epithelium with numerous calcified particles, and partly enclosed by inner enamel epithelium-like columnar cells and enamel organ-like structures accompanied with cuboidal and/or stellate reticulum-like cells. Immunohistochemically, the epithelium tested positive for cytokeratin 14 and 19. Moreover, amelogenin and ameloblastin, matrix proteins relating to enamel formation, were positive in the covering epithelium. The tumor was enucleated as a whole, and no recurrence was recorded thereafter. Although the presence of numerous calcified particles was unique, we diagnosed this lesion as POT based on the above-described features. Furthermore, we emphasize the importance of the differential diagnosis of POT and other odontogenic tumors that resemble corresponding tooth germ components.
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Affiliation(s)
- Kou Kayamori
- Department of Oral Pathology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Maiko Tsuchiya
- Department of Oral Diagnostic Pathology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yasuyuki Michi
- Department of Oral and Maxillofacial Surgery, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Ami Kuribayashi
- Department of Oral and Maxillofacial Radiology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | | | - Kei Sakamoto
- Department of Oral Pathology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Tetsuya Yoda
- Department of Maxillofacial Surgery, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Tohru Ikeda
- Department of Oral Pathology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Optimization of culture conditions for the efficient differentiation of mouse-induced pluripotent stem cells into dental epithelial-like cells. In Vitro Cell Dev Biol Anim 2020; 56:816-824. [PMID: 33051833 DOI: 10.1007/s11626-020-00505-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Accepted: 09/02/2020] [Indexed: 10/23/2022]
Abstract
The establishment of a method to derive dental epithelial cells seems to be an important challenge toward realizing the whole tooth regeneration. In order to obtain a source of dental epithelial-like cells, a new methodology has been previously developed by our research group. In the method, induced pluripotent stem cells are cultured in suspension in the presence of neurotrophin-4 to form embryoid bodies followed by further adherent culture of the embryoid bodies in DMEM basal nutrient medium. The present study was directed to improve the efficiency of dental epithelial-like cell production, by focusing on the optimization of initial cell number for the formation of embryoid bodies and the addition of epidermal growth factor as well as its timing. Our results demonstrated that an initial cell number of 1000 cells/drop gives the highest efficiency of dental epithelial-like cell production. It appears that, under this condition, medium deterioration is moderated, and that cell-cell interactions are optimized within embryoid bodies. On the other hand, epidermal growth factor serves to increase the abundance of dental epithelial-like cells when added to the medium together with neurotrophin-4 during embryoid body formation. The promotive effect of epidermal growth factor may involve the transactivation of TrkB, mediated by the effectors of epidermal growth factor receptor signaling.
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Dental Germ Tumor: An Unusual, Cystic, Mixed Epithelial-Mesenchymal Odontogenic Tumor. Head Neck Pathol 2020; 14:1149-1153. [PMID: 32026295 PMCID: PMC7669930 DOI: 10.1007/s12105-020-01136-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Accepted: 01/25/2020] [Indexed: 10/24/2022]
Abstract
Although odontogenic lesions have been extensively described and studied, anomalous, challenging cases occasionally come to the attention of the pathologist. Here, we report the clinical and microscopic characteristics of an unusual cystic lesion of odontogenic origin. A 16-year-old male presented with swelling and pain to palpation of the right mandible as well as numbness of the right lower lip. Radiographically, the corresponding lesion was well-defined and radiolucent with internal radiopaque foci. It extended from the right first premolar posteriorly, approaching the angle of the mandible, and involved the mandibular first molar which was impacted and displaced. The second and third right mandibular molars were also impacted and displaced. The patient was treated by excisional biopsy under general anesthesia. The histopathologic examination revealed the presence of multicystic areas lined by a thin, non-keratinizing squamous epithelium that resembled the epithelial lining of a dentigerous cyst. In continuity with the cystic lining, areas of myxoid tissue reminiscent of dental papilla were observed. The myxoid tissue formed structures that were surfaced by an epithelium comprising a basal layer of ameloblast-like cells with reverse polarity of the nuclei. Above the basilar cells, additional layers of epithelial cells composed a structure resembling the enamel organ. Subjacent to the basilar ameloblast-like cells, a condensation of mesenchymal cells with polarized nuclei opposite to the ameloblast-like cells was present. These mesenchymal cells resembled odontoblasts. In addition, numerous mineralized structures amongst the odontogenic epithelial tissue were present. To date, the patient remains well and without evidence of recurrence after 36 months of follow-up.
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Rare variants of head and neck squamous cell carcinoma -differential immunohistochemical profiles. Acta Histochem 2019; 121:151444. [PMID: 31548087 DOI: 10.1016/j.acthis.2019.151444] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
We aimed to immunohistochemically characterize the pattern of expression of epithelial markers in rare head and neck squamous cell carcinoma (HNSCC) variants: carcinoma cuniculatum (CC) and adenosquamous carcinoma (ASC). We also present an additional variant of HNSCC with concomitant basaloid and squamous components that has overlapping morphological features with odontogenic and non-odontogenic tumors, which we termed basalo-squamous carcinoma (BSC). The selected markers included CK5/6, p40, CK19, BerEP4, p16 and SOX10. All tumors were CK5/6 and p40 positive. CK19 and BerEP4 were positive in BSC and focally in ASC but negative in CC. p16 was positive in 3 (60%) of the CCs, focally positive in ASC and negative in BSC. SOX10 was negative in all three variants. Our results highlight the plasticity of the lining epithelium revealing differential profiles of immuno-expression of the selected molecular markers, possibly reflecting their diverse histopathogenesis.
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Saluja P, Arora M, Dave A, Shetty VP, Khurana C, Madan A, Rai R, Katiyar A. Role of Cytokeratin-7 in the pathogenesis of odontogenic cysts - an immunohistochemical study. Med Pharm Rep 2019; 92:282-287. [PMID: 31460511 PMCID: PMC6709964 DOI: 10.15386/mpr-1112] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Accepted: 09/28/2018] [Indexed: 11/23/2022] Open
Abstract
Introduction Odontogenic cysts are distinct entities and quite a common occurrence in the jaw bones. These are individual lesions which arise from the same odontogenic apparatus but with varying pathogenesis. Cytokeratins are integral components in tooth development and are expressed across the odontogenic tissues in physiological and pathological states. Aim To elucidate the role of cytokeratin-7 in the pathogenesis of odontogenic cysts by immunohistochemistry. Method Cytokeratin-7 (CK-7) was assessed in 39 cases of odontogenic lesions retrieved from the archival files which included 15 cases of dentigerous cysts (DC), 12 cases of odontogenic keratocysts (OKC) and 12 cases of radicular cysts (RC) and also 8 cases of control specimens. Statistical analysis Results obtained were statistically analyzed using chi-square test to assess the association between different odontogenic cysts used in this study and Cytokeration-7 staining. The difference was considered to be of statistical significance if the p value was ≤ 0.05. Results CK7 expression was maximum in dentigerous cycts (66.66%) followed by radicular cysts (41.66%) and odontogenic keratocysts (16.6%). On evaluation of staining and expression pattern, highest positivity is shown in dentigerous cysts and the positivity is seen in suprabasal (60%) and superficial layers (40%) whereas radicular cysts and odontogenic keratocysts showed positivity in superficial and spinous layers. Conclusion Cytokeratin-7 expression correlates with the degree of differentiation of the epithelium. So the cysts with a well-differentiated epithelium (RC and DC) express CK-7, while the cysts with a less well-differentiated epithelium (OKC) show slight positivity. Thus it can be useful to differentiate OKC from DC and RC.
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Affiliation(s)
- Pulin Saluja
- Oral Pathology Department, SGT Dental Collage, Hospital and Research Institute, Gurgaon, India
| | - Manpreet Arora
- Oral Pathology Department, SGT Dental Collage, Hospital and Research Institute, Gurgaon, India
| | - Aparna Dave
- Oral Pathology Department, SGT Dental Collage, Hospital and Research Institute, Gurgaon, India
| | | | - Charu Khurana
- National Oral Health Program (NOHP), Centre for Dental Education and Research (CDER), All India Institute of Medical Sciences (AIIMS), New Delhi, India
| | - Ajay Madan
- General Surgery Department, Brahmashakti Sanjivani Hospital, Bahadurgarh, India
| | - Radhika Rai
- Oral Pathology Department, SGT Dental Collage, Hospital and Research Institute, Gurgaon, India
| | - Alpana Katiyar
- Pedodontics Department, Maitri College of Dentistry and Research, Chhattisgarh, India
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Said R, Zheng L, Saunders T, Zeidler M, Papagerakis S, Papagerakis P. Generation of Amelx-iCre Mice Supports Ameloblast-Specific Role for Stim1. J Dent Res 2019; 98:1002-1010. [PMID: 31329049 DOI: 10.1177/0022034519858976] [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] [Indexed: 01/08/2023] Open
Abstract
The identification and targeting of the molecular pathways regulating amelogenesis is an ongoing challenge in dental research, and progress has been restricted by the limited number of genetic tools available to study gene function in ameloblasts. Here, we generated 4 transgenic Cre-driver mouse lines that express improved Cre (iCre)-recombinase from the locus of the mouse ameloblast-specific gene amelogenin X (Amelx-iCre) with a large (250-kb) bacterial artificial chromosome DNA vector. All 4 Amelx-iCre transgenic lines were bred with ROSA26 reporter mice to characterize the iCre developmental pattern with the LacZ gene encoding β-galactosidase enzyme activity assay and Cre protein immunohistochemistry. From the 4 generated transgenic lines, 2 were selected for further analysis because they expressed a high amount of Cre recombinase exclusively in ameloblasts and showed developmental stage- and cell-specific β-galactosidase activity mimicking the endogenous amelogenin expression. To test the functionality of the selected transgenic models, we bred the 2 Amelx-iCre mice lines with stromal interaction molecule 1 (Stim1) floxed mice to generate ameloblast-specific Stim1 conditional knockout mice (Stim1 cKO). STIM1 protein serves as one of the main calcium sensors in ameloblasts and plays a major role in enamel mineralization and ameloblast differentiation. Amelx-iCre mice displayed exclusive CRE-mediated recombination in incisor and molar ameloblasts. Stim1 cKO mice showed a severely defected enamel phenotype, including reduced structural integrity concomitant with increased attrition and smaller teeth. The phenotype and genotype of the Amelx-iCre/Stim1 cKO showed significant differences with the previously reported Ker14-Cre/Stim1 cKO, highlighting the need for cell- and stage-specific Cre lines for an accurate phenotype-genotype comparison. Furthermore, our model has the advantage of carrying the entire Amelx gene locus rather than being limited to an Amelx partial promoter construct, which greatly enhances the stability and the specificity of our Cre expression. As such, the Amelx-iCre transgenic lines that we developed may serve as a powerful tool for targeting ameloblast-specific gene expression in future investigations.
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Affiliation(s)
- R Said
- 1 Department of Anatomy and Cell Biology, College of Medicine, University of Saskatchewan, Saskatoon, SK, Canada.,2 College of Dentistry, University of Saskatchewan, Saskatoon, SK, Canada
| | - L Zheng
- 3 Department of Orthodontics, School of Dentistry, Ohio State University, Columbus, OH, USA
| | - T Saunders
- 4 Transgenic Animal Model Core, University of Michigan, Ann Arbor, MI, USA
| | - M Zeidler
- 4 Transgenic Animal Model Core, University of Michigan, Ann Arbor, MI, USA
| | - S Papagerakis
- 5 Department of Otolaryngology-Head and Neck Surgery, School of Medicine, University of Michigan, Ann Arbor, MI, USA.,6 Department of Surgery, College of Medicine, University of Saskatchewan, Saskatoon, SK, Canada
| | - P Papagerakis
- 1 Department of Anatomy and Cell Biology, College of Medicine, University of Saskatchewan, Saskatoon, SK, Canada.,2 College of Dentistry, University of Saskatchewan, Saskatoon, SK, Canada.,7 Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
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Rosa ACG, Teixeira LN, Passador-Santos F, Furuse C, Montalli VÂM, de Araújo NS, de Araújo VC. Benign odontogenic ghost cell lesions revisited and new considerations on dysplastic dentin. Clin Oral Investig 2019; 23:4335-4343. [PMID: 30911844 DOI: 10.1007/s00784-019-02863-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Accepted: 02/18/2019] [Indexed: 02/07/2023]
Abstract
OBJECTIVES This study aimed to revisit benign odontogenic ghost cell lesions (BOGCL) by hematoxylin and eosin staining and immunohistochemistry. MATERIALS AND METHODS Thirty cases of calcifying odontogenic cyst (COC) and 6 cases of dentinogenic ghost cell tumor (DGCT) were selected for histopathological and immunohistochemical analysis. Sections stained for cytokeratin (K) 14, K-19, amelogenin, collagen type 1 (COL-1), and dentin matrix acidic phosphoprotein 1 (DMP-1) were evaluated using qualitative analysis. Sections stained for Ki-67 and minichromosome maintenance protein-2 (MCM-2) were evaluated using semi-quantitative analysis. RESULTS A morphologic overlap was noticed in all BOGCL. Moreover, no differences were detected in the expression of K-14 and K-19. The expression of proliferative markers Ki-67 and MCM-2 was similar between cystic and tumor lesions (p > .05). The presence of COL-1 and absence of amelogenin in the so-called dysplastic dentin, associated with its histologic pattern, suggest that this is in fact an enameloid-like tissue. CONCLUSIONS The dysplastic dentin should be considered an enameloid-like tissue in these lesions. CLINICAL RELEVANCE The similarity in histology, protein expression, and proliferative marker indices between COC and DGCT suggest that they are a sole entity and likely represent types of the same neoplasia.
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Affiliation(s)
- Ana Cláudia Garcia Rosa
- School of Medicine, Federal University of Tocantins, Quadra 109 Norte, Avenida NS-15, ALCNO-14, Plano Diretor Norte, Palmas, Tocantins, 77001-090, Brazil. .,Faculty of Human and Economics and Health Sciences ITPAC, School of Medicine and Dentistry, Palmas, TO, Brazil.
| | - Lucas Novaes Teixeira
- São Leopoldo Mandic Institute and Research Center, Oral Pathology, Campinas, SP, Brazil
| | | | - Cristiane Furuse
- Pathology and Clinical Propaedeutics, São Paulo State University, Araçatuba, SP, Brazil
| | | | - Ney Soares de Araújo
- São Leopoldo Mandic Institute and Research Center, Oral Pathology, Campinas, SP, Brazil
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Differentiation of mouse-induced pluripotent stem cells into dental epithelial-like cells in the absence of added serum. In Vitro Cell Dev Biol Anim 2019; 55:130-137. [PMID: 30659476 DOI: 10.1007/s11626-019-00320-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Accepted: 01/07/2019] [Indexed: 01/30/2023]
Abstract
Recent studies have successfully generated tooth-like structure by mimicking the reciprocal interaction between dental epithelial and mesenchymal cells in tooth organogenesis. However, clinical applications of these methods are limited primarily due to the lack of appropriate sources for dental epithelial cells. Induced pluripotent stem cells (iPSCs) are attractive as a source for dental epithelial cells due to their unique characteristics. In this study, we examined the effect of neurotrophin-4 (NT-4) on the differentiation of mouse iPSCs (miPSCs) into dental epithelial cells. Our results showed that the addition of NT-4 during the formation of embryoid body significantly triggered the upregulation of epithelial markers such as p63 and CK14, suggesting that NT-4 provides an inductive condition for the differentiation of miPSCs into epithelial cells. Expansion of the NT-4-treated cells under serum-free culture conditions improves the formation of cells with cobblestone-like morphology and significantly downregulated the expression of pluripotent and ectodermal markers. Phenotypic analysis revealed that a dental epithelial surface marker, CD49f, was highly expressed on these cells. Formation of miPSCs-derived dental epithelial-like cells was further confirmed by the expression of ameloblast-specific markers. These results suggest that the addition of NT-4 during the formation of embryoid body together with the serum-free culture condition promoted the differentiation of miPSCs into dental epithelial-like cells.
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12
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Menditti D, Laino L, DI Domenico M, Troiano G, Guglielmotti M, Sava S, Mezzogiorno A, Baldi A. Cysts and Pseudocysts of the Oral Cavity: Revision of the Literature and a New Proposed Classification. In Vivo 2018; 32:999-1007. [PMID: 30150421 DOI: 10.21873/invivo.11340] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2018] [Revised: 06/16/2018] [Accepted: 06/21/2018] [Indexed: 01/19/2023]
Abstract
This article includes a comprehensive and up-to-date review on the cysts of the oral cavity. Several classifications of odontogenic (OC) and non-odontogenic (non-OC) oral cysts and the surrounding regions have been proposed. We suggest a new critical classification based on an established relationship between anatomical area, histological origin and clinical behavior (frequency, rate of recurrence, malignant potential). Moreover, the differential cytokeratin (CKs) expression of the various cysts is reported as epithelium-specific markers of differential diagnosis. Finally, issues related to differential diagnosis and therapeutic approaches of the cysts included in the two groups are described.
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Affiliation(s)
- Dardo Menditti
- Department of Dentistry, Orthodontics and Oral Surgery, University of Campania, Naples, Italy
| | - Luigi Laino
- Department of Clinical and Experimental Medicine, University of Campania, Naples, Italy
| | - Marina DI Domenico
- Department of General Pathology and Biochemistry, University of Campania, Naples, Italy
| | - Giuseppe Troiano
- Department of Clinical and Experimental Medicine, University of Campania, Naples, Italy
| | - Mario Guglielmotti
- Department of Dentistry, Orthodontics and Oral Surgery, University of Campania, Naples, Italy
| | - Sara Sava
- Department of Dentistry, Orthodontics and Oral Surgery, University of Campania, Naples, Italy
| | - Antonio Mezzogiorno
- Department of Mental Health and Physics, Preventive Medicine, University of Campania, Naples, Italy
| | - Alfonso Baldi
- Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, University of Campania, Naples, Italy
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Immunohistochemical Profile of Ameloblastic Carcinoma Arising from an Amyloid-Producing Odontogenic Tumour in a Miniature Dachshund. J Comp Pathol 2018; 166:54-58. [PMID: 30691607 DOI: 10.1016/j.jcpa.2018.10.182] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 10/24/2018] [Accepted: 10/30/2018] [Indexed: 11/20/2022]
Abstract
A 13-year-old female miniature dachshund was presented with a centrally-located sublingual mass in the rostral mandibular region. The focally ulcerated growth completely covered the left (305) and right (405) premolar teeth and partially covered the right canine teeth (404). A punch biopsy sample revealed neoplastic proliferation of odontogenic epithelium arranged in irregular cords with frequent comedo-like necrosis. Following the initial diagnosis of ameloblastic carcinoma, a bilateral rostral hemimandibulectomy was performed. Although the detailed examination of the resected mass was consistent with the initial diagnosis, it also contained birefringent congophilic, amelogenin-labelled amyloid deposits similar to an amyloid-producing odontogenic tumour (APOT) in 30-40% of the mass, in continuity with the ameloblastic carcinoma. All neoplastic cells had diffuse moderate expression of cytokeratin (CK) AE1/AE3 and CK5, diffuse mild expression of CK14 and multifocal moderate expression of CK19. Because the APOT-like growth in the mass was histologically benign, the tumour was diagnosed as an ameloblastic carcinoma arising from an APOT.
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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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Seki T, Aizawa R, Tanaka J, Yajima-Himuro S, Kato M, Tanaka K, Mishima K, Yamamoto M. Establishment of mouse gingival junctional epithelial cell line using a bioengineered tooth system. Biochem Biophys Res Commun 2018; 497:167-172. [PMID: 29428727 DOI: 10.1016/j.bbrc.2018.02.047] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2018] [Accepted: 02/06/2018] [Indexed: 01/26/2023]
Abstract
Junctional epithelium (JE), one of the constituents of periodontal tissue, has several unique features to prevent bacterial infection. However, the molecular mechanisms of these cells remain to be completely elucidated because there has been no JE cell line to date. We have succeeded in isolating JE cells expressing green fluorescent protein (GFP) by using a bioengineered tooth technique in mice. The gene expressions of GFP-positive JE cells, isolated from around the erupted bioengineered teeth using flow cytometry, were analyzed by RNA sequencing. GFP-positive cells derived from the bioengineered tooth germs showed similar gene expression patterns to primary JE cells. The isolated GFP-positive JE cells were immortalized by transducing the simian virus 40 large T antigen using lentiviral vectors. The established GFP-positive JE cells maintained proliferative activity for more than 20 passages, and did not show cellular senescence as demonstrated by β-galactosidase assay. These cells also expressed similar gene expression patterns to primary JE cells. The established cell lines may prove useful for future investigation of JE characteristics in vitro.
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Affiliation(s)
- Tatsuaki Seki
- Department of Periodontology, School of Dentistry, Showa University, 2-1-1 Kitasenzoku, Ohta-ku, Tokyo 145-8515, Japan; Division of Pathology Department of Oral Diagnostic Sciences, School of Dentistry, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Ryo Aizawa
- Department of Periodontology, School of Dentistry, Showa University, 2-1-1 Kitasenzoku, Ohta-ku, Tokyo 145-8515, Japan.
| | - Junichi Tanaka
- Division of Pathology Department of Oral Diagnostic Sciences, School of Dentistry, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Sara Yajima-Himuro
- Department of Periodontology, School of Dentistry, Showa University, 2-1-1 Kitasenzoku, Ohta-ku, Tokyo 145-8515, Japan
| | - Mayu Kato
- Department of Periodontology, School of Dentistry, Showa University, 2-1-1 Kitasenzoku, Ohta-ku, Tokyo 145-8515, Japan; Division of Pathology Department of Oral Diagnostic Sciences, School of Dentistry, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Keisuke Tanaka
- Department of Periodontology, School of Dentistry, Showa University, 2-1-1 Kitasenzoku, Ohta-ku, Tokyo 145-8515, Japan; Division of Pathology Department of Oral Diagnostic Sciences, School of Dentistry, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Kenji Mishima
- Division of Pathology Department of Oral Diagnostic Sciences, School of Dentistry, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Matsuo Yamamoto
- Department of Periodontology, School of Dentistry, Showa University, 2-1-1 Kitasenzoku, Ohta-ku, Tokyo 145-8515, Japan.
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Hirayama K, Endoh C, Kagawa Y, Ohmachi T, Yamagami T, Nomura K, Matsuda K, Okamoto M, Taniyama H. Amyloid-Producing Odontogenic Tumors of the Facial Skin in Three Cats. Vet Pathol 2016; 54:218-221. [PMID: 27511309 DOI: 10.1177/0300985816660746] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Amyloid-producing odontogenic tumors (APOTs) of the facial skin were diagnosed in 3 domestic cats. The neoplasms had the histopathological characteristics of the odontogenic tumor. The neoplastic cells were present in irregular islands, strands, and sheets. The peripheral neoplastic cells of the islands and strands were arranged in a palisading fashion, while the central cells were polyhedral to stellate and randomly arranged. Multiple spherules of homogeneous eosinophilic material were closely apposed to the neoplastic epithelial cells. The spherules stained with Congo red and produced an apple green birefringence under polarization microscopy, indicative of amyloid. Immunohistochemically, amyloid materials of the neoplasms reacted with polyclonal antibodies for ameloblastin, amelogenin, and sheathlin antibodies. Neoplastic epithelial cells also reacted with antiameloblastin, amelogenin, and sheathlin antibodies, with varied intensity. The histopathological and immunohistochemical characteristics of dermal neoplasms of the 3 cats were analogous to those of APOTs reported in the dog and the cat.
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Affiliation(s)
- K Hirayama
- 1 Department of Veterinary Pathology, School of Veterinary Medicine, Rakuno Gakuen University, Hokkaido, Japan
| | - C Endoh
- 1 Department of Veterinary Pathology, School of Veterinary Medicine, Rakuno Gakuen University, Hokkaido, Japan
| | | | - T Ohmachi
- 3 Patho Labo Co, Ltd, Shizuoka, Japan
| | | | - K Nomura
- 4 Marupi Lifetech Co, Ltd, Osaka, Japan
| | - K Matsuda
- 1 Department of Veterinary Pathology, School of Veterinary Medicine, Rakuno Gakuen University, Hokkaido, Japan
| | - M Okamoto
- 1 Department of Veterinary Pathology, School of Veterinary Medicine, Rakuno Gakuen University, Hokkaido, Japan
| | - H Taniyama
- 1 Department of Veterinary Pathology, School of Veterinary Medicine, Rakuno Gakuen University, Hokkaido, Japan
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Cellular Reprogramming Using Defined Factors and MicroRNAs. Stem Cells Int 2016; 2016:7530942. [PMID: 27382371 PMCID: PMC4921148 DOI: 10.1155/2016/7530942] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Revised: 03/08/2016] [Accepted: 04/10/2016] [Indexed: 01/07/2023] Open
Abstract
Development of human bodies, organs, and tissues contains numerous steps of cellular differentiation including an initial zygote, embryonic stem (ES) cells, three germ layers, and multiple expertized lineages of cells. Induced pluripotent stem (iPS) cells have been recently developed using defined reprogramming factors such as Nanog, Klf5, Oct3/4 (Pou5f1), Sox2, and Myc. This outstanding innovation is largely changing life science and medicine. Methods of direct reprogramming of cells into myocytes, neurons, chondrocytes, and osteoblasts have been further developed using modified combination of factors such as N-myc, L-myc, Sox9, and microRNAs in defined cell/tissue culture conditions. Mesenchymal stem cells (MSCs) and dental pulp stem cells (DPSCs) are also emerging multipotent stem cells with particular microRNA expression signatures. It was shown that miRNA-720 had a role in cellular reprogramming through targeting the pluripotency factor Nanog and induction of DNA methyltransferases (DNMTs). This review reports histories, topics, and idea of cellular reprogramming.
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BMP7 and EREG Contribute to the Inductive Potential of Dental Mesenchyme. Sci Rep 2015; 5:9903. [PMID: 25952286 PMCID: PMC4424660 DOI: 10.1038/srep09903] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Accepted: 03/17/2015] [Indexed: 02/05/2023] Open
Abstract
Odontogenesis is accomplished by reciprocal signaling between the epithelial and mesenchymal compartments. It is generally accepted that the inductive mesenchyme is capable of inducing the odontogenic commitment of both dental and non-dental epithelial cells. However, the duration of this signal in the developing dental mesenchyme and whether adult dental pulp tissue maintains its inductive capability remain unclear. This study investigated the contribution of growth factors to regulating the inductive potential of the dental mesenchyme. Human oral epithelial cells (OEs) were co-cultured with either human dental mesenchymal/papilla cells (FDPCs) or human dental pulp cells (ADPCs) under 2-dimensional or 3-dimensional conditions. Odontogenic-associated genes and proteins were detected by qPCR and immunofluorescence, respectively, and significant differences were observed between the two co-culture systems. The BMP7 and EREG expression levels in FDPCs were significantly higher than in ADPCs, as indicated by human growth factor PCR arrays and immunofluorescence analyses. OEs co-cultured with ADPCs supplemented with BMP7 and EREG expressed ameloblastic differentiation genes. Our study suggests that BMP7 and EREG expression in late bell-stage human dental papilla contributes to the inductive potential of dental mesenchyme. Furthermore, adult dental pulp cells supplemented with these two growth factors re-established the inductive potential of postnatal dental pulp tissue.
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Li S, Ge S, Yang P. Expression of cytokeratins in enamel organ, junctional epithelium and epithelial cell rests of Malassez. J Periodontal Res 2015; 50:846-54. [PMID: 25808290 DOI: 10.1111/jre.12272] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/20/2015] [Indexed: 11/28/2022]
Abstract
BACKGROUND AND OBJECTIVE After tooth formation is complete, it is suggested that continuity exists between the epithelial cell rests of Malassez (ERM), reduced enamel epithelium (REE) and subsequently the junctional epithelium. However, the junctional epithelium was reported to differ from REE and ERM. The developmental relationships between and among them remain controversial. Therefore, in the present study we examined the expression of cytokeratins in the three types of epithelia to investigate the epithelial phenotypes. MATERIAL AND METHODS The maxillae of Wistar rats, 1, 2, 3 and 7 wk of age, were used, and the expression of CK14, CK17, CK19, CK10/CK13 and AE1/AE3 was detected using immunoperoxidase techniques. RESULTS There was negative staining for CK10/CK13 in all the epithelia. ERM stained strongly for AE1/AE3, CK14, CK17 and CK19. During the transformation of inner enamel epithelial (IEE) cells into reduced ameloblasts and subsequently into junctional epithelium, strong staining for CK14 was evident in IEE, REE and junctional epithelium, whereas the expression of AE1/AE3 and of CK19 were initially negative in IEE and then strong in REE and junctional epithelium, respectively. In particular, the expression of CK17 was strongly positive in ERM and REE, but was negative in IEE and junctional epithelium. CONCLUSION ERM are of odontogenic origin and junctional epithelium has an epithelial phenotype different from REE and ERM. This is the first report to demonstrate that CK17 can be used as a marker to distinguish junctional epithelium from ERM.
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Affiliation(s)
- S Li
- Shandong Provincial Key Laboratory of Oral Biomedicine, School and Hospital of Stomatology, Shandong University, Jinan, Shandong Province, China
| | - S Ge
- Shandong Provincial Key Laboratory of Oral Biomedicine, School and Hospital of Stomatology, Shandong University, Jinan, Shandong Province, China.,Department of Periodontology, Hospital of Stomatology, Shandong University, Jinan, Shandong Province, China
| | - P Yang
- Shandong Provincial Key Laboratory of Oral Biomedicine, School and Hospital of Stomatology, Shandong University, Jinan, Shandong Province, China.,Department of Periodontology, Hospital of Stomatology, Shandong University, Jinan, Shandong Province, China
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20
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Amaral MBF, Souto GR, Horta MCR, Gomez RS, Mesquita RA. Ossifying odontogenic fibroma: A rare case report. J Clin Exp Dent 2015; 6:e588-91. [PMID: 25674331 PMCID: PMC4312691 DOI: 10.4317/jced.51440] [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: 12/27/2013] [Accepted: 06/12/2014] [Indexed: 11/17/2022] Open
Abstract
Odontogenic fibroma (OF) is a rare benign odontogenic neoplasm that is most commonly found in the mandibular/premolar region of female patients in the second to fourth decades of life. Well-defined radiolucent lesions that may induce root resorption are normally observed. Rare variants of OF have been described in the prior literature, including references to: 1) giant cell lesions, 2) amyloid-like protein deposition, and 3) ossifying variants. Immunohistochemistry can contribute to understanding the biological behavior and the pathogenesis of OF. Therefore, this case report aimed to describe a new case of ossifying OF and discuss the histopathology and immunohistochemical features.
Key words:Odontogenic fibroma, jaw tumors, ossifying variant.
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Affiliation(s)
- Márcio-Bruno-Figueiredo Amaral
- Department of Oral Surgery and Pathology. School of Dentistry. Universidade Federal de Minas Gerais. Belo Horizonte - MG, Brazil
| | - Giovanna-Ribeiro Souto
- Department of Oral Surgery and Pathology. School of Dentistry. Universidade Federal de Minas Gerais. Belo Horizonte - MG, Brazil
| | | | - Ricardo-Santiago Gomez
- Department of Oral Surgery and Pathology. School of Dentistry. Universidade Federal de Minas Gerais. Belo Horizonte - MG, Brazil
| | - Ricardo-Alves Mesquita
- Department of Oral Surgery and Pathology. School of Dentistry. Universidade Federal de Minas Gerais. Belo Horizonte - MG, Brazil
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21
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da Costa NMM, Correa RS, Júnior ISM, Figueiredo AJR, Vilhena KFB, Farias-Junior PMA, Teixeira FB, Ferreira NMM, Pereira-Júnior JB, Dantas KDGF, da Silva MCF, Silva-Junior AF, Alves-Junior SDM, Pinheiro JDJV, Lima RR. Physical, chemical, and immunohistochemical investigation of the damage to salivary glands in a model of intoxication with aluminium citrate. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2014; 11:12429-40. [PMID: 25464135 PMCID: PMC4276622 DOI: 10.3390/ijerph111212429] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Revised: 10/09/2014] [Accepted: 10/23/2014] [Indexed: 12/21/2022]
Abstract
Aluminum absorption leads to deposits in several tissues. In this study, we have investigated, to our knowledge for the first time, aluminum deposition in the salivary glands in addition to the resultant cellular changes in the parotid and submandibular salivary glands in a model of chronic intoxication with aluminum citrate in rats. Aluminum deposits were observed in the parotid and submandibular glands. Immunohistochemical evaluation of cytokeratin-18 revealed a decreased expression in the parotid gland with no changes in the submandibular gland. A decreased expression of α-smooth muscle actin was observed in the myoepithelial cells of both glands. The expression of metallothionein I and II (MT-I/II), a group of metal-binding proteins, which are useful indicators for detecting physiological responses to metal exposure, was higher in both glands. In conclusion, we have shown that at a certain time and quantity of dosage, aluminum citrate promotes aluminum deposition in the parotid and submandibular glands, leads to an increased expression of MT-I/II in both the glands, damages the cytoskeleton of the myoepithelial cells in both glands, and damages the cytoskeleton of the acinar/ductal cells of the parotid glands, with the submandibular glands showing resistance to the toxicity of the latter.
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Affiliation(s)
- Natacha M. M. da Costa
- Laboratory of Functional and Structural Biology, Institute of Biological Sciences, Federal University of Pará, 66075-900 Belém-Pará, Brazil; E-Mails: (N.M.M.C.); (R.S.C.); (I.S.M.J.); (A.J.R.F.); (K.F.B.V.); (P.M.A.F.-J.); (F.B.T.); (N.M.M.F.); (M.C.F.S.); (A.F.S.-J.)
| | - Russell S. Correa
- Laboratory of Functional and Structural Biology, Institute of Biological Sciences, Federal University of Pará, 66075-900 Belém-Pará, Brazil; E-Mails: (N.M.M.C.); (R.S.C.); (I.S.M.J.); (A.J.R.F.); (K.F.B.V.); (P.M.A.F.-J.); (F.B.T.); (N.M.M.F.); (M.C.F.S.); (A.F.S.-J.)
| | - Ismael S. M. Júnior
- Laboratory of Functional and Structural Biology, Institute of Biological Sciences, Federal University of Pará, 66075-900 Belém-Pará, Brazil; E-Mails: (N.M.M.C.); (R.S.C.); (I.S.M.J.); (A.J.R.F.); (K.F.B.V.); (P.M.A.F.-J.); (F.B.T.); (N.M.M.F.); (M.C.F.S.); (A.F.S.-J.)
| | - Adilson J. R. Figueiredo
- Laboratory of Functional and Structural Biology, Institute of Biological Sciences, Federal University of Pará, 66075-900 Belém-Pará, Brazil; E-Mails: (N.M.M.C.); (R.S.C.); (I.S.M.J.); (A.J.R.F.); (K.F.B.V.); (P.M.A.F.-J.); (F.B.T.); (N.M.M.F.); (M.C.F.S.); (A.F.S.-J.)
| | - Kelly F. B. Vilhena
- Laboratory of Functional and Structural Biology, Institute of Biological Sciences, Federal University of Pará, 66075-900 Belém-Pará, Brazil; E-Mails: (N.M.M.C.); (R.S.C.); (I.S.M.J.); (A.J.R.F.); (K.F.B.V.); (P.M.A.F.-J.); (F.B.T.); (N.M.M.F.); (M.C.F.S.); (A.F.S.-J.)
| | - Paulo M. A. Farias-Junior
- Laboratory of Functional and Structural Biology, Institute of Biological Sciences, Federal University of Pará, 66075-900 Belém-Pará, Brazil; E-Mails: (N.M.M.C.); (R.S.C.); (I.S.M.J.); (A.J.R.F.); (K.F.B.V.); (P.M.A.F.-J.); (F.B.T.); (N.M.M.F.); (M.C.F.S.); (A.F.S.-J.)
| | - Francisco B. Teixeira
- Laboratory of Functional and Structural Biology, Institute of Biological Sciences, Federal University of Pará, 66075-900 Belém-Pará, Brazil; E-Mails: (N.M.M.C.); (R.S.C.); (I.S.M.J.); (A.J.R.F.); (K.F.B.V.); (P.M.A.F.-J.); (F.B.T.); (N.M.M.F.); (M.C.F.S.); (A.F.S.-J.)
| | - Nayana M. M. Ferreira
- Laboratory of Functional and Structural Biology, Institute of Biological Sciences, Federal University of Pará, 66075-900 Belém-Pará, Brazil; E-Mails: (N.M.M.C.); (R.S.C.); (I.S.M.J.); (A.J.R.F.); (K.F.B.V.); (P.M.A.F.-J.); (F.B.T.); (N.M.M.F.); (M.C.F.S.); (A.F.S.-J.)
| | - João B. Pereira-Júnior
- School of Chemistry, Institute of Exact and Natural Sciences, Federal University of Pará, 66075-900 Belém-Pará, Brazil; E-Mails: (J.B.P.-J.); (K.G.F.D.)
| | - Kelly das Graças F. Dantas
- School of Chemistry, Institute of Exact and Natural Sciences, Federal University of Pará, 66075-900 Belém-Pará, Brazil; E-Mails: (J.B.P.-J.); (K.G.F.D.)
| | - Marcia C. F. da Silva
- Laboratory of Functional and Structural Biology, Institute of Biological Sciences, Federal University of Pará, 66075-900 Belém-Pará, Brazil; E-Mails: (N.M.M.C.); (R.S.C.); (I.S.M.J.); (A.J.R.F.); (K.F.B.V.); (P.M.A.F.-J.); (F.B.T.); (N.M.M.F.); (M.C.F.S.); (A.F.S.-J.)
| | - Ademir F. Silva-Junior
- Laboratory of Functional and Structural Biology, Institute of Biological Sciences, Federal University of Pará, 66075-900 Belém-Pará, Brazil; E-Mails: (N.M.M.C.); (R.S.C.); (I.S.M.J.); (A.J.R.F.); (K.F.B.V.); (P.M.A.F.-J.); (F.B.T.); (N.M.M.F.); (M.C.F.S.); (A.F.S.-J.)
| | - Sergio de M. Alves-Junior
- School of Dentistry, Institute of Health Sciences, Federal University of Pará, 66075-900 Belém-Pará, Brazil; E-Mails: (S.M.A.-J.); (J.J.V.P.)
| | - João de Jesus V. Pinheiro
- School of Dentistry, Institute of Health Sciences, Federal University of Pará, 66075-900 Belém-Pará, Brazil; E-Mails: (S.M.A.-J.); (J.J.V.P.)
| | - Rafael Rodrigues Lima
- Laboratory of Functional and Structural Biology, Institute of Biological Sciences, Federal University of Pará, 66075-900 Belém-Pará, Brazil; E-Mails: (N.M.M.C.); (R.S.C.); (I.S.M.J.); (A.J.R.F.); (K.F.B.V.); (P.M.A.F.-J.); (F.B.T.); (N.M.M.F.); (M.C.F.S.); (A.F.S.-J.)
- Author to whom correspondence should be addressed: E-Mail: ; Tel.: +55-91-8134-8294; Fax: +55-91-3201-7741
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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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23
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Martínez Martínez M, Romero CS, Piña AR, Palma Guzmán JM, de Almeida OP. Pigmented ameloblastic fibro-odontoma: clinical, histological, and immunohistochemical profile. Int J Surg Pathol 2014; 23:52-60. [PMID: 25339415 DOI: 10.1177/1066896914553663] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Ameloblastic fibro-odontoma (AFO) is a slow-growing, expansive, benign odontogenic tumor, composed of ameloblastic epithelium embedded in an ectomesenchymal stroma resembling dental papilla, containing hard dental tissue in variable degrees of maturation, including enamel, dentin, and sometimes cementum. AFO typically affects the posterior mandible, causing bony expansion. We report a case of pigmented AFO in a 5-year-old boy, comprising clinical and histological features illustrated by immunohistochemistry using a large panel of antibodies, polarized light microscopy and scanning electron microscopy.
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24
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Hakki SS, Kayis SA, Hakki EE, Bozkurt SB, Duruksu G, Unal ZS, Turaç G, Karaoz E. Comparison of mesenchymal stem cells isolated from pulp and periodontal ligament. J Periodontol 2014; 86:283-91. [PMID: 25325708 DOI: 10.1902/jop.2014.140257] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
BACKGROUND Cell-based therapy using mesenchymal stem cells (MSCs) seems promising to obtain regeneration of dental tissues. A comparison of tissue sources, including periodontal ligament (PDL) versus pulp (P), could provide critical information to select an appropriate MSC population for designing predictable regenerative therapies. The purpose of this study is to compare the proliferation and stemness and the MSC-specific and mineralized tissue-specific gene expression of P-MSCs and PDL-MSCs. METHODS MSCs were obtained from PDL and P tissue of premolars (n = 3) extracted for orthodontic reasons. MSC proliferation was evaluated using a real-time cell analyzer for 160 hours. Telomerase activity was evaluated by a telomeric repeat amplification protocol assay based on enzyme-linked immunosorbent assay. Total RNA was isolated from the MSCs on day 3. A polymerase chain reaction (PCR) array was used to compare the expression of MSC-specific genes. The expression of mineralized tissue-associated genes, including Type I collagen (COL I), runt-related transcription factor 2 (RunX2), bone sialoprotein (BSP), and osteocalcin (OCN) messenger RNA (mRNA), was evaluated using quantitative real-time PCR. RESULTS Higher proliferation potential and telomerase activity were observed in the P-MSCs compared to PDL-MSCs of premolar teeth. Fourteen of 84 genes related to MSCs were expressed differently in the PDL-MSCs versus the P-MSCs. The expressions of bone morphogenetic protein 2 (BMP2) and BMP6; sex-determining region Y-box 9 (SOX9); integrin, alpha 6 (ITGA6); melanoma cell adhesion molecule (MCAM); phosphatidylinositol glycan anchor biosynthesis, class S (PIGS); prominin 1 (PROM1); ribosomal protein L13A (RPL13A); and microphthalmia-associated transcription factor (MITF) were higher in the P-MSCs compared to the PDL-MSCs, and higher expression of matrix metalloproteinase 2 (MMP2), interleukin (IL)-6, insulin (INS), alanyl (membrane) aminopeptidase (ANPEP), and IL-10 were observed in the PDL-MSCs. However, there was no statistically significant difference in the expression of mineralized tissue-associated genes, including BSP and RunX2, between the P-MSCs and the PDL-MSCs. Higher expression of COL I and lower expression of OCN mRNA transcripts were noted in the PDL-MSCs compared to the P-MSCs. CONCLUSIONS The results of this study suggest that MSCs isolated from P and PDL tissues show different cellular behavior. To increase the predictability of MSC-based regenerative treatment, differences in dental tissue-derived MSCs and favorable aspects of cell sources should be further clarified.
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Affiliation(s)
- Sema S Hakki
- Department of Periodontology, Faculty of Dentistry, Selçuk University, Konya, Turkey
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Kero D, Kalibovic Govorko D, Vukojevic K, Cubela M, Soljic V, Saraga-Babic M. Expression of cytokeratin 8, vimentin, syndecan-1 and Ki-67 during human tooth development. J Mol Histol 2014; 45:627-40. [PMID: 25120060 DOI: 10.1007/s10735-014-9592-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Accepted: 08/06/2014] [Indexed: 12/22/2022]
Abstract
Spatio-temporal immunolocalizations of cytokeratin 8 (CK8), vimentin, syndecan-1 and Ki-67 were analyzed in ten human incisors and canine tooth germs between the 7th and 20th developmental weeks. CK8 expression was mild to moderate in the epithelial tooth parts, while it shifted from absent or mild in its mesenchymal parts, but few cells, sparsely distributed throughout the tooth germ, strongly expressed CK8. As development progressed, CK8 expression increased to strong in preameloblasts, while expression of vimentin increased to moderate in the epithelial and mesenchymal tooth parts, particularly in the dental papilla and sac. Co-expression of CK8 and vimentin was observed in some parts of the tooth germ, and was increasing in the differentiating preameloblasts and preodontoblasts. Syndecan-1 showed characteristic shift of expression from epithelial to mesenchymal tooth parts, being particularly strong in dental papilla, sac and cervical loops, while co-expression of Ki-67/syndecan-1 was strong in the dental papilla. Our study demonstrated spatio-temporal expression and restricted co-expression of the investigated markers, indicating participation of CK8 and vimentin in cell proliferation and migration, and differentiation of preodontoblasts and preameloblasts. Our data also suggest involvement of syndecan-1 in morphogenesis of the developing tooth crown and cervical loops, and together with CK8 and vimentin in differentiation of preameloblasts and preodontoblasts.
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Affiliation(s)
- D Kero
- School of Dental Medicine, University of Split, Soltanska 2, 21000, Split, Croatia
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26
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Malignant transformation of an odontogenic cyst in a period of 10 years. Case Rep Dent 2014; 2014:762969. [PMID: 24804126 PMCID: PMC3997871 DOI: 10.1155/2014/762969] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2014] [Accepted: 02/26/2014] [Indexed: 11/17/2022] Open
Abstract
Primary intraosseous carcinoma of the jaws (PIOSCC) might arise from odontogenic epithelium, more commonly from a previous odontogenic cyst. The aim of this case is to illustrate that the clinician should consider that an apparent benign dentigerous cyst can suffer malignant transformation and that all material removed from a patient must be evaluated histologically. A 44-year-old man presented in a routine periapical X-ray an impacted lower left third molar with radiolucency over its crown. Ten years later, the patient complained of pain in the same region and the tooth was extracted. After one month, the patient still complained of pain and suffered a fracture of the mandible. A biopsy was performed and carcinoma was diagnosed. The patient was treated surgically with adjuvant radio- and chemotherapy and after 8 years, he is well without signs of recurrences. This report describes a central mandibular carcinoma probably developed from a previous dentigerous cyst.
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Yajima-Himuro S, Oshima M, Yamamoto G, Ogawa M, Furuya M, Tanaka J, Nishii K, Mishima K, Tachikawa T, Tsuji T, Yamamoto M. The junctional epithelium originates from the odontogenic epithelium of an erupted tooth. Sci Rep 2014; 4:4867. [PMID: 24785116 PMCID: PMC4007090 DOI: 10.1038/srep04867] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Accepted: 04/04/2014] [Indexed: 11/19/2022] Open
Abstract
The junctional epithelium (JE) is an epithelial component that is directly attached to the tooth surface and has a protective function against periodontal diseases. In this study, we determined the origin of the JE using a bioengineered tooth technique. We transplanted the bioengineered tooth germ into the alveolar bone with an epithelial component that expressed green fluorescence protein. The reduced enamel epithelium from the bioengineered tooth fused with the oral epithelium, and the JE was apparently formed around the bioengineered tooth 50 days after transplantation. Importantly, the JE exhibited green fluorescence for at least 140 days after transplantation, suggesting that the JE was not replaced by oral epithelium. Therefore, our results demonstrated that the origin of the JE was the odontogenic epithelium, and odontogenic epithelium-derived JE was maintained for a relatively long period.
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Affiliation(s)
- Sara Yajima-Himuro
- Department of Periodontology, Showa University School of Dentistry, 2-1-1 Kitasenzoku, Ohta-ku, Tokyo 145-8515, Japan
| | - Masamitsu Oshima
- Research Institute for Science and Technology, Tokyo University of Science, Chiba 278-8510, Japan
| | - Gou Yamamoto
- Division of Pathology Department of Oral Diagnostic Sciences, School of Dentistry, Showa University School of Dentistry, 1-5-8, Hatanodai, Shinagawa-ku, Tokyo, 142-8555, Japan
| | - Miho Ogawa
- Organ Technologies Inc., Tokyo 101-0048, Japan
| | - Madoka Furuya
- Department of Periodontology, Showa University School of Dentistry, 2-1-1 Kitasenzoku, Ohta-ku, Tokyo 145-8515, Japan
| | - Junichi Tanaka
- Division of Pathology Department of Oral Diagnostic Sciences, School of Dentistry, Showa University School of Dentistry, 1-5-8, Hatanodai, Shinagawa-ku, Tokyo, 142-8555, Japan
| | - Kousuke Nishii
- Department of Periodontology, Showa University School of Dentistry, 2-1-1 Kitasenzoku, Ohta-ku, Tokyo 145-8515, Japan
| | - Kenji Mishima
- Division of Pathology Department of Oral Diagnostic Sciences, School of Dentistry, Showa University School of Dentistry, 1-5-8, Hatanodai, Shinagawa-ku, Tokyo, 142-8555, Japan
| | - Tetsuhiko Tachikawa
- Division of Pathology Department of Oral Diagnostic Sciences, School of Dentistry, Showa University School of Dentistry, 1-5-8, Hatanodai, Shinagawa-ku, Tokyo, 142-8555, Japan
| | - Takashi Tsuji
- Research Institute for Science and Technology, Tokyo University of Science, Chiba 278-8510, Japan
- Organ Technologies Inc., Tokyo 101-0048, Japan
| | - Matsuo Yamamoto
- Department of Periodontology, Showa University School of Dentistry, 2-1-1 Kitasenzoku, Ohta-ku, Tokyo 145-8515, Japan
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28
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Kiyoshima T, Fujiwara H, Nagata K, Wada H, Ookuma YF, Shiotsuka M, Kihara M, Hasegawa K, Someya H, Sakai H. Induction of dental epithelial cell differentiation marker gene expression in non-odontogenic human keratinocytes by transfection with thymosin beta 4. Stem Cell Res 2013; 12:309-22. [PMID: 24342703 DOI: 10.1016/j.scr.2013.11.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2013] [Revised: 11/06/2013] [Accepted: 11/08/2013] [Indexed: 01/06/2023] Open
Abstract
Previous studies have shown that the recombination of cells liberated from developing tooth germs develop into teeth. However, it is difficult to use human developing tooth germ as a source of cells because of ethical issues. Previous studies have reported that thymosin beta 4 (Tmsb4x) is closely related to the initiation and development of the tooth germ. We herein attempted to establish odontogenic epithelial cells from non-odontogenic HaCaT cells by transfection with TMSB4X. TMSB4X-transfected cells formed nodules that were positive for Alizarin-red S (ALZ) and von Kossa staining (calcium phosphate deposits) when cultured in calcification-inducing medium. Three selected clones showing larger amounts of calcium deposits than the other clones, expressed PITX2, Cytokeratin 14, and Sonic Hedgehog. The upregulation of odontogenesis-related genes, such as runt-related transcription factor 2 (RUNX2), Amelogenin (AMELX), Ameloblastin (AMBN) and Enamelin (ENAM) was also detected. These proteins were immunohistochemically observed in nodules positive for the ALZ and von Kossa staining. RUNX2-positive selected TMSB4X-transfected cells implanted into the dorsal subcutaneous tissue of nude mice formed matrix deposits. Immunohistochemically, AMELX, AMBN and ENAM were observed in the matrix deposits. This study demonstrated the possibility of induction of dental epithelial cell differentiation marker gene expression in non-odontogenic HaCaT cells by TMSB4X.
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Affiliation(s)
- Tamotsu Kiyoshima
- Laboratory of Oral Pathology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Hiroaki Fujiwara
- Laboratory of Oral Pathology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Kengo Nagata
- Laboratory of Oral Pathology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Hiroko Wada
- Laboratory of Oral Pathology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Yukiko F Ookuma
- Section of Pediatric Dentistry, Division of Oral Health, Growth and Development, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Maho Shiotsuka
- Laboratory of Oral Pathology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; Section of Orthodontics and Dentofacial Orthopedics, Division of Oral Health, Growth and Development, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Makiko Kihara
- Laboratory of Oral Pathology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; Section of Orthodontics and Dentofacial Orthopedics, Division of Oral Health, Growth and Development, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Kana Hasegawa
- Laboratory of Oral Pathology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; Department of Endodontology and Operative Dentistry, Division of Oral Rehabilitation, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Hirotaka Someya
- Laboratory of Oral Pathology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; Section of Implant and Rehabilitative Dentistry, Division of Oral Rehabilitation, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Hidetaka Sakai
- Laboratory of Oral Pathology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.
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29
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Kaminagakura E, Domingos PLB, da Rosa MRD, Loyola AM, Cardoso SV, Lopes MCDA, Bonan PRF, de Faria PR. Detection of cytokeratins in ghost cells of calcifying cystic odontogenic tumor indicates an altered keratinization and hair follicle differentiation for their development. Ann Diagn Pathol 2013; 17:514-7. [PMID: 24119871 DOI: 10.1016/j.anndiagpath.2013.07.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2013] [Revised: 06/28/2013] [Accepted: 07/29/2013] [Indexed: 11/17/2022]
Abstract
Calcifying cystic odontogenic tumors (CCOTs) are benign cystic lesions of odontogenic origin characterized by an ameloblastoma-like epithelium and the presence of a group of cells named ghost cells. The pattern of cytokeratin (Ck) expression on these lesions remains unclear and needs to be clarified. To this end, the expression of Ck6, Ck13, Ck14, Ck18, and Ck19 in the epithelium lining of 7 cases of CCOTs was evaluated by immunohistochemistry. For this, the epithelium lining was divided into 3 distinct regions: basal layer, suprabasal layer, and the compartment composed of ghost cells. In this study, 6 cases (85.7%) were classified as type 1 and 1 (14.3%) as type 4. All cases were negative for Ck13 and Ck18, despite the epithelial layer, as well as in the ghost cells. Ck6 was only positive in the ghost cells. Positivity for Ck14 and Ck19 was found in the basal and suprabasal layers, including the ghost cells. The results showing positivity for Ck14 and Ck19 in all of the analyzed cases reinforce CCOT as being of odontogenic origin, and the restricted expression of Ck6 in the ghost cells may be indicative that these cells suffer an altered differentiation into hair follicles in CCOTs.
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Affiliation(s)
- Estela Kaminagakura
- Dental School, Universidade Estadual Paulista, UNESP, São José dos Campos, São Paulo, Brazil
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30
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Pal SK, Sakamoto K, Aragaki T, Akashi T, Yamaguchi A. The expression profiles of acidic epithelial keratins in ameloblastoma. Oral Surg Oral Med Oral Pathol Oral Radiol 2013; 115:523-31. [PMID: 23522646 DOI: 10.1016/j.oooo.2013.01.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2012] [Revised: 01/04/2013] [Accepted: 01/14/2013] [Indexed: 01/26/2023]
Abstract
OBJECTIVE To characterize the subtypes of ameloblastoma by differentiation markers. STUDY DESIGN Expression of 9 major acidic epithelial keratins was immunohistochemically examined in 28 ameloblastomas. RESULTS Keratin 15 (K15) expression patterns corresponded to histological variants: follicular, plexiform and acanthomatous. Tumor nests comprising K15-expressing basal cells mimicked oral epithelium or dental lamina, and tumor nests comprising K15-negative basal cells mimicked outer enamel epithelium. Keratin 19 (K19) was consistently expressed in solid/multicystic ameloblastoma and unicystic ameloblastoma, while peripheral ameloblastoma and desmoplastic ameloblastoma contained K19-negative cells. CONCLUSIONS The 4 current subtypes had unvaried expression patterns within each group. However, they could be divided into 2 groups by K19 expression pattern: solid/multicystic and unicystic versus extraosseous/peripheral and desmoplastic. K15 expression pattern represented various types of differentiation for tumor nests mimicking tooth germ and oral epithelium. The results clarify the homogeneity and heterogeneity of ameloblastoma cell lineage and differentiation.
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Affiliation(s)
- Samir Kumar Pal
- Section of Oral Pathology, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
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31
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32
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Role of perlecan, a basement membrane-type heparan sulfate proteoglycan, in enamel organ morphogenesis. J Oral Biosci 2013. [DOI: 10.1016/j.job.2012.12.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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33
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Hatai H, Iba M, Kojima D, Park CH, Tsuchida Y, Oyamada T. Spindle cell ameloblastic carcinoma in a labrador retriever dog. J Vet Med Sci 2012; 75:639-41. [PMID: 23229541 DOI: 10.1292/jvms.12-0446] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
A 13-year-old castrated male Labrador retriever dog presented with a mass caudal to the first molar of his left mandible. Although the tumor was excised, a recurrent tumor was detected one month later and resected. Both tumors displayed invasive growth and were composed of neoplastic proliferation arranged in irregular lobules, nests and cords continuous with mucosal epithelium. The most prominent feature of the tumors was the presence of many proliferating spindle cells admixed with palisading basal-like cells, acanthocytes and stellate cells. In immunohistochemical examinations, the spindle cells were found to be positive for vimentin; cytokeratin AE1/AE3, 5/6, 14 and 19; and p63. The other neoplastic cells were positive for all of these markers shown above except vimentin. Based on these findings, the tumors were diagnosed as spindle cell ameloblastic carcinoma.
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Affiliation(s)
- Hitoshi Hatai
- Laboratory of Veterinary Pathology, School of Veterinary Medicine, Kitasato University, Higashi 23-35-1, Towada, Aomori 034-8628, Japan.
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Fulton A, Arzi B, Murphy B, Naydan DK, Verstraete FJM. The expression of calretinin and cytokeratins in canine acanthomatous ameloblastoma and oral squamous cell carcinoma. Vet Comp Oncol 2012; 12:258-65. [DOI: 10.1111/j.1476-5829.2012.00356.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Revised: 07/31/2012] [Accepted: 08/13/2012] [Indexed: 12/01/2022]
Affiliation(s)
- A. Fulton
- William R. Pritchard Veterinary Medical Teaching Hospital, School of Veterinary Medicine; University of California; Davis CA USA
| | - B. Arzi
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine; University of California; Davis CA USA
| | - B. Murphy
- Department of Pathology, Microbiology and Immunology, School of Veterinary Medicine; University of California; Davis CA USA
| | - D. K. Naydan
- Department of Pathology, Microbiology and Immunology, School of Veterinary Medicine; University of California; Davis CA USA
| | - F. J. M. Verstraete
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine; University of California; Davis CA USA
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35
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Delaney MA, Singh K, Murphy CL, Solomon A, Nel S, Boy SC. Immunohistochemical and biochemical evidence of ameloblastic origin of amyloid-producing odontogenic tumors in cats. Vet Pathol 2012; 50:238-42. [PMID: 22732361 DOI: 10.1177/0300985812452583] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Amyloid-producing odontogenic tumors (APOT) are rare, and in cats, the histogenesis of the amyloid remains undetermined. In the present study, APOTs in 3 cats were characterized by immunohistochemistry, and the amyloid components analyzed using tandem mass spectrometry. Antiameloblastin antibodies labeled both neoplastic epithelial cells and amyloid in all cases. Neoplastic epithelial cells had strong, diffuse immunoreactivity to antibodies against cytokeratin AE1/AE3, cytokeratin 14, and cytokeratin 19 in all cases and focal immunoreactivity to nerve growth factor receptor antibodies in 2 of 3 cases. Amyloid and some tumor stromal cells were weakly positive for laminin. Calretinin, amelogenin, S100, and glial fibrillary acidic protein antibodies did not label neoplastic epithelial cells or amyloid. Extracted amyloid peptide sequences were compared to the porcine database because the cat genome is not yet complete. Based on this comparison, 1 identical ameloblastin peptide was detected in each tumor. These results suggest that feline APOTs and the amyloid they produce are of ameloblastic lineage.
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Affiliation(s)
- M A Delaney
- Veterinary Diagnostic Laboratory, College of Veterinary Medicine, University of Illinois 2001 South Lincoln, Urbana, IL 61802, USA.
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36
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Hübner S, Efthymiadis A. Recent progress in histochemistry and cell biology. Histochem Cell Biol 2012; 137:403-57. [PMID: 22366957 DOI: 10.1007/s00418-012-0933-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/06/2012] [Indexed: 01/06/2023]
Abstract
Studies published in Histochemistry and Cell Biology in the year 2011 represent once more a manifest of established and newly sophisticated techniques being exploited to put tissue- and cell type-specific molecules into a functional context. The review is therefore the Histochemistry and Cell Biology's yearly intention to provide interested readers appropriate summaries of investigations touching the areas of tissue biology, developmental biology, the biology of the immune system, stem cell research, the biology of subcellular compartments, in order to put the message of such studies into natural scientific-/human- and also pathological-relevant correlations.
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Affiliation(s)
- Stefan Hübner
- Institute of Anatomy and Cell Biology, University of Würzburg, Würzburg, Germany.
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37
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Expression of Cytokeratins in the Epithelium of Canine Odontogenic Tumours. J Comp Pathol 2011; 145:345-51. [DOI: 10.1016/j.jcpa.2011.03.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2010] [Revised: 01/27/2011] [Accepted: 03/02/2011] [Indexed: 01/02/2023]
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Yoon HJ, Jo BC, Shin WJ, Cho YA, Lee JI, Hong SP, Hong SD. Comparative immunohistochemical study of ameloblastoma and ameloblastic carcinoma. ACTA ACUST UNITED AC 2011; 112:767-76. [PMID: 22014999 DOI: 10.1016/j.tripleo.2011.06.036] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2011] [Revised: 06/22/2011] [Accepted: 06/27/2011] [Indexed: 02/08/2023]
Abstract
OBJECTIVE Ameloblastic carcinoma combines the histologic features of ameloblastoma with cytologic atypia, regardless of whether it has metastasized. Because of its rarity, there are few immunoprofile studies of ameloblastic carcinoma and few comparative studies of ameloblastic carcinoma and ameloblastoma. In this study, we compared the expression levels of cytokeratins (CKs), matrix metalloproteinases (MMPs), and Ki-67 between ameloblastoma and ameloblastic carcinoma, and assessed the usefulness of these markers for differentiating the tumors. STUDY DESIGN We assessed CK7, CK14, CK18, CK19, MMP-2, MMP-9, and Ki-67 expression by immunohistochemistry in 10 cases of ameloblastoma and 7 cases of ameloblastic carcinoma and then compared expression patterns between the 2 groups. RESULTS Immunostaining for CK14 and CK19 was diffuse and strongly positive in both tumor types, but staining for CK7 was focally positive in only 1 case of ameloblastoma and absent in all cases of ameloblastic carcinoma. However, there was a significant difference in CK18 expression between the 2 tumors (P = .000). Whereas 80% of ameloblastomas showed negative reactivity for CK18, most cases of ameloblastic carcinomas showed a moderate to strong intensity of immunostaining for CK18. Regarding the expression of MMPs, there were significant differences in parenchymal MMP-2 and stromal MMP-9 expression between the 2 tumors. Compared to ameloblastoma, ameloblastic carcinoma showed significantly strong expression of MMP-2 in parenchymal cells (P = .001) and MMP-9 in stromal cells (P = .013). However, there were no differences in MMP-2 expression of stromal cells and MMP-9 expression of parenchymal cells between ameloblastoma and ameloblastic carcinoma. The mean Ki-67 labeling index (LI) of ameloblastic carcinomas was 17.21%, which was significantly higher than that of ameloblastomas (3.57%; P = .002). CONCLUSIONS The significant expression of CK18, parenchymal MMP-2, stromal MMP-9, and Ki-67 could provide useful markers for differentiating ameloblastic carcinoma from ameloblastoma.
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Affiliation(s)
- Hye-Jung Yoon
- Department of Oral Pathology, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, South Korea
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39
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Ida-Yonemochi H, Satokata I, Ohshima H, Sato T, Yokoyama M, Yamada Y, Saku T. Morphogenetic roles of perlecan in the tooth enamel organ: an analysis of overexpression using transgenic mice. Matrix Biol 2011; 30:379-88. [PMID: 21933708 DOI: 10.1016/j.matbio.2011.08.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2011] [Revised: 07/29/2011] [Accepted: 08/31/2011] [Indexed: 11/18/2022]
Abstract
Perlecan, a heparan sulfate proteoglycan, is enriched in the intercellular space of the enamel organ. To understand the role of perlecan in tooth morphogenesis, we used a keratin 5 promoter to generate transgenic (Tg) mice that over-express perlecan in epithelial cells, and examined their tooth germs at tissue and cellular levels. Immunohistochemistry showed that perlecan was more strongly expressed in the enamel organ cells of Tg mice than in wild-type mice. Histopathology showed wider intercellular spaces in the stellate reticulum of the Tg molars and loss of cellular polarity in the enamel organ, especially in its cervical region. Hertwig's epithelial root sheath (HERS) cells in Tg mice were irregularly aligned due to excessive deposits of perlecan along the inner, as well as on the outer sides of the HERS. Tg molars had dull-ended crowns and outward-curved tooth roots and their enamel was poorly crystallized, resulting in pronounced attrition of molar cusp areas. In Tg mice, expression of integrin β1 mRNA was remarkably higher at E18, while expression of bFGF, TGF-β1, DSPP and Shh was more elevated at P1. The overexpression of perlecan in the enamel organ resulted in irregular morphology of teeth, suggesting that the expression of perlecan regulates growth factor signaling in a stage-dependent manner during each step of the interaction between ameloblast-lineage cells and mesenchymal cells.
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Affiliation(s)
- Hiroko Ida-Yonemochi
- Division of Oral Pathology, Department of Tissue Regeneration and Reconstruction, Niigata University Graduate School of Medical and Dental Sciences, 2-5274 Gakkocho-dori, Chuo-ku, Niigata 951-8514, Japan
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40
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Karaöz E, Demircan PC, Sağlam Ö, Aksoy A, Kaymaz F, Duruksu G. Human dental pulp stem cells demonstrate better neural and epithelial stem cell properties than bone marrow-derived mesenchymal stem cells. Histochem Cell Biol 2011; 136:455-73. [DOI: 10.1007/s00418-011-0858-3] [Citation(s) in RCA: 142] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/16/2011] [Indexed: 12/23/2022]
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41
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CD56 expression is associated with neuroectodermal differentiation in ameloblastomas: an immunohistochemical evaluation in comparison with odontogenic cystic lesions. Med Mol Morphol 2011; 44:79-85. [PMID: 21717310 DOI: 10.1007/s00795-010-0510-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2010] [Accepted: 03/29/2010] [Indexed: 12/19/2022]
Abstract
Ameloblastoma (AB), which is the most common odontogenic tumor, may originate from the dental lamina remnants. The expression of CD56, which is a transmembrane molecule, is associated with neuroectodermal differentiation of the embryonal cells. The aim of this study was to evaluate the expression of CD56 in AB, in comparison with other odontogenic cysts. We used formalin-fixed, paraffi n-embedded specimens from 34 cases of AB, 10 cases of keratocystic odontogenic tumor (KCOT), and 7 cases of dentigerous cyst (DC). We immunohistochemically examined CD56, NeuroD1, and N-cadherin expression in these tumors as compared with the expression patterns of various epithelial markers. Seventy-four percent of AB showed immunopositivity for CD56, and both CD56 and N-cadherin were diffusely positive in the outer columnar cells of AB. The immunopositivities for NeuroD1 and N-cadherin were also observed in the outer cells of AB. None of the DC cases was positive for CD56, whereas half the cases of KCOT were positive. Because CD56 is expressed in the inner enamel epithelium of enamel organs, the outer columnar cells of AB are likely to be the differentiation phenotype of the inner enamel epithelium, which is associated with neuroectodermal differentiation. The aberrant NeuroD1 expression may induce CD56 expression in AB and KCOT.
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Ferro F, Spelat R, Falini G, Gallelli A, D'Aurizio F, Puppato E, Pandolfi M, Beltrami AP, Cesselli D, Beltrami CA, Ambesi-Impiombato FS, Curcio F. Adipose tissue-derived stem cell in vitro differentiation in a three-dimensional dental bud structure. THE AMERICAN JOURNAL OF PATHOLOGY 2011; 178:2299-310. [PMID: 21514442 PMCID: PMC3081158 DOI: 10.1016/j.ajpath.2011.01.055] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2010] [Revised: 01/05/2011] [Accepted: 01/10/2011] [Indexed: 01/09/2023]
Abstract
Tooth morphogenesis requires sequential and reciprocal interactions between the cranial neural crest-derived mesenchymal cells and the stomadial epithelium, which regulate tooth morphogenesis and differentiation. We show how mesenchyme-derived single stem cell populations can be induced to transdifferentiate in vitro in a structure similar to a dental bud. The presence of stem cells in the adipose tissue has been previously reported. We incubated primary cultures of human adipose tissue-derived stem cells in a dental-inducing medium and cultured the aggregates in three-dimensional conditions. Four weeks later, cells formed a three-dimensional organized structure similar to a dental bud. Expression of dental tissue-related markers was tested assaying lineage-specific mRNA and proteins by RT-PCR, immunoblot, IHC, and physical-chemical analysis. In the induction medium, cells were positive for ameloblastic and odontoblastic markers as both mRNAs and proteins. Also, cells expressed epithelial, mesenchymal, and basement membrane markers with a positional relationship similar to the physiologic dental morphogenesis. Physical-chemical analysis revealed 200-nm and 50-nm oriented hydroxyapatite crystals as displayed in vivo by enamel and dentin, respectively. In conclusion, we show that adipose tissue-derived stem cells in vitro can transdifferentiate to produce a specific three-dimensional organization and phenotype resembling a dental bud even in the absence of structural matrix or scaffold to guide the developmental process.
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Affiliation(s)
- Federico Ferro
- Department of Pathology and Experimental and Clinical Medicine, University of Udine, Udine, Italy
| | - Renza Spelat
- Department of Pathology and Experimental and Clinical Medicine, University of Udine, Udine, Italy
| | - Giuseppe Falini
- Department of Chemistry “G. Ciamican,” Alma Mater Studiorum University of Bologna, via Selmi, Bologna, Italy
| | | | | | - Elisa Puppato
- Centre of Regenerative Medicine, University of Udine, Udine, Italy
| | - Maura Pandolfi
- Centre of Regenerative Medicine, University of Udine, Udine, Italy
| | | | - Daniela Cesselli
- Centre of Regenerative Medicine, University of Udine, Udine, Italy
| | | | | | - Francesco Curcio
- Department of Pathology and Experimental and Clinical Medicine, University of Udine, Udine, Italy
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Hosoya A, Kwak S, Kim EJ, Lunny DP, Lane EB, Cho SW, Jung HS. Immunohistochemical localization of cytokeratins in the junctional region of ectoderm and endoderm. Anat Rec (Hoboken) 2011; 293:1864-72. [PMID: 20818615 DOI: 10.1002/ar.21233] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Although tridermic species have two junctional regions of ectoderm and endoderm between their epidermis and digestive tract, we actually know little about these particular boundaries. Cytokeratins are the major intermediate filaments of epithelial cells and show a high degree of tissue specificity. Therefore, to characterize the epithelial cells in the junctional region of ectoderm and endoderm, we immunohistochemically examined the localization of cytokeratins 5, 7/17, 14, 18, Sox17, and alpha-fetoprotein (AFP) in the oropharyngeal and anorectal regions during the mouse gastrulation process. At embryonic day (E) 9.5, cytokeratins 5, 7/17, 14, and 18 were detected in all epithelial cells of the oropharyngeal region. At E12.5, cytokeratin 5-positive cells were not observed in the middle area of the oral cavity; however, the immunoreactivity was strong in the anterior and posterior areas. The immunoreaction of cytokeratins 18 was seen only in the middle and posterior areas of the oral mucosa. Cytokeratins 7/17 and 14 were localized in all areas of the oropharyngeal region. Sox17 and AFP, which are endodermal markers, were detected in the middle and posterior areas of the oral mucosa, but not in the anterior area. Moreover, this same localization pattern of cytokeratins also existed in the anorectal region of the E12.5 embryo, suggesting that the localization of cytokeratins and endodermal markers might give an implication for the boundary between ectoderm and endoderm. These results also suggest that these cytokeratins are useful molecules for monitoring the epithelial cell differentiation in the junctional region of the germ layers.
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Affiliation(s)
- Akihiro Hosoya
- Division in Anatomy and Developmental Biology, Department of Oral Biology, Research Center for Orofacial Hard Tissue Regeneration, Brain Korea 21 Project, Yonsei University College of Dentistry, Seoul, Republic of Korea
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Crivelini MM, Soubhia AMP, Felipini RC. Study on the origin and nature of the adenomatoid odontogenic tumor by immunohistochemistry. J Appl Oral Sci 2011; 13:406-12. [PMID: 20865228 DOI: 10.1590/s1678-77572005000400017] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2004] [Accepted: 10/11/2005] [Indexed: 11/22/2022] Open
Abstract
The adenomatoid odontogenic tumor (AOT) is a clinically benign lesion. Discussions about the AOT hamartomatous or neoplastic nature, and the probable odontogenic epithelial cell it originates from still exist. This research aimed to study and discuss the subject by the immunohistochemical detection of cytokeratins, laminin, collagen IV, PCNA and p53 in 8 tumor samples and 8 dental follicle samples containing reduced enamel epithelium. The results have shown that CK14 labelling indicated differentiation grades for secreting ameloblasts or ameloblasts in the post-secreting stage in the adenomatoid structure of AOT. Laminin, found on the luminal surface of adenomatoid structures, was compatible with the reduced enamel epithelium during the "protective stage of amelogenesis". PCNA specifically labelled the spindled areas and peripheral cords of the AOT, indicating that these areas are responsible for tumor growth. After considerations about pathogenesis, the authors suggested that the nature of AOT is hamartomatous with histogenesis from the reduced enamel epithelium.
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Affiliation(s)
- Marcelo Macedo Crivelini
- Department of Oral Pathology, School of Dentistry, State University, Araçatuba, São Paulo, Brazil.
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Nel S, Van Heerden MB, Steenkamp G, Van Heerden WFP, Boy SC. Immunohistochemical profile of odontogenic epithelium in developing dog teeth (Canis familiaris). Vet Pathol 2010; 48:276-82. [PMID: 20634416 DOI: 10.1177/0300985810374843] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Tumors of the jaw bones and oral soft tissue are relatively common lesions in dogs. The aim of this study was to find cell markers to differentiate odontogenic epithelium from nonodontogenic epithelium for future research on the pathogenesis and pathology of odontogenic neoplasms in dogs. Keratin 14 and 19 staining was observed in odontogenic and nonodontogenic epithelium, whereas amelogenin and p75 neurotrophin receptor immunoreactivity was observed in certain odontogenic epithelial cells at various stages of development but not in other epithelial cells. Calretinin staining was observed in the alveolar epithelial cells directly overlying the developing tooth germ in 28 of 39 sections (71.8%), as well as the dental laminae in 30 of 35 sections (85.7%) and Serres rests in 24 of 28 sections (85.7%). Focal positivity was detected in the respiratory mucosa, some hair follicles, and fusion epithelium of the palate, but no calretinin staining was observed in other oral epithelial cells; therefore, calretinin has potential to be utilized as a marker to differentiate odontogenic form nonodontogenic epithelium.
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Affiliation(s)
- S Nel
- Department of Oral Pathology and Oral Biology, School of Dentistry, Faculty of Health Sciences, University of Pretoria, Oral and Dental Hospital, Bophelo Road, Pretoria, South Africa.
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Bragulla HH, Homberger DG. Structure and functions of keratin proteins in simple, stratified, keratinized and cornified epithelia. J Anat 2010; 214:516-59. [PMID: 19422428 DOI: 10.1111/j.1469-7580.2009.01066.x] [Citation(s) in RCA: 397] [Impact Index Per Article: 28.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Historically, the term 'keratin' stood for all of the proteins extracted from skin modifications, such as horns, claws and hooves. Subsequently, it was realized that this keratin is actually a mixture of keratins, keratin filament-associated proteins and other proteins, such as enzymes. Keratins were then defined as certain filament-forming proteins with specific physicochemical properties and extracted from the cornified layer of the epidermis, whereas those filament-forming proteins that were extracted from the living layers of the epidermis were grouped as 'prekeratins' or 'cytokeratins'. Currently, the term 'keratin' covers all intermediate filament-forming proteins with specific physicochemical properties and produced in any vertebrate epithelia. Similarly, the nomenclature of epithelia as cornified, keratinized or non-keratinized is based historically on the notion that only the epidermis of skin modifications such as horns, claws and hooves is cornified, that the non-modified epidermis is a keratinized stratified epithelium, and that all other stratified and non-stratified epithelia are non-keratinized epithelia. At this point in time, the concepts of keratins and of keratinized or cornified epithelia need clarification and revision concerning the structure and function of keratin and keratin filaments in various epithelia of different species, as well as of keratin genes and their modifications, in view of recent research, such as the sequencing of keratin proteins and their genes, cell culture, transfection of epithelial cells, immunohistochemistry and immunoblotting. Recently, new functions of keratins and keratin filaments in cell signaling and intracellular vesicle transport have been discovered. It is currently understood that all stratified epithelia are keratinized and that some of these keratinized stratified epithelia cornify by forming a Stratum corneum. The processes of keratinization and cornification in skin modifications are different especially with respect to the keratins that are produced. Future research in keratins will provide a better understanding of the processes of keratinization and cornification of stratified epithelia, including those of skin modifications, of the adaptability of epithelia in general, of skin diseases, and of the changes in structure and function of epithelia in the course of evolution. This review focuses on keratins and keratin filaments in mammalian tissue but keratins in the tissues of some other vertebrates are also considered.
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Affiliation(s)
- Hermann H Bragulla
- Department of Comparative Biomedical Sciences, Louisiana State University, Baton Rouge, 70803, USA.
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Adenomatoid odontogenic tumor concomitant with cystic complex odontoma: case report. ACTA ACUST UNITED AC 2009; 108:e25-9. [PMID: 19778732 DOI: 10.1016/j.tripleo.2009.06.024] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2009] [Revised: 06/17/2009] [Accepted: 06/26/2009] [Indexed: 11/24/2022]
Abstract
This case report describes a 10-year-old female patient with an adenomatoid odontogenic tumor developing together with a cystic complex odontoma. This occurrence is considered very unusual. Immunohistochemical detection of cytokeratins AE1/AE3, CK5, CK8, CK10, CK14, CK19 and Ki-67 was performed.
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48
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Peripheral ameloblastoma in-situ: an evidential fact of surface epithelium origin. ACTA ACUST UNITED AC 2009; 108:763-7. [DOI: 10.1016/j.tripleo.2009.06.018] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2009] [Revised: 06/19/2009] [Accepted: 06/26/2009] [Indexed: 11/18/2022]
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Kawai S, Ito E, Yamaguchi A, Eishi Y, Okada N. Immunohistochemical characteristics of odontogenic carcinomas: their use in diagnosing and elucidating histogenesis. ACTA ACUST UNITED AC 2009. [DOI: 10.3353/omp.13.55] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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50
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Gratzinger D, Salama ME, Poh CF, Rouse RV. Ameloblastoma, calcifying epithelial odontogenic tumor, and glandular odontogenic cyst show a distinctive immunophenotype with some myoepithelial antigen expression. J Oral Pathol Med 2008; 37:177-84. [PMID: 18251942 DOI: 10.1111/j.1600-0714.2007.00613.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
BACKGROUND Odontogenic neoplasms have some morphologic overlap with salivary gland neoplasms, many of which show myoepithelial differentiation. In the 1980s, an ultrastructural study identified a population of myoepithelial-like cells in calcifying epithelial odontogenic tumor. Myoepithelial derived tumors have since been shown to have distinct immunohistochemical profiles. METHODS We examined a series of odontogenic neoplasms, including 11 ameloblastomas, four calcifying epithelial odontogenic tumors, five glandular odontogenic cysts (GOCs), and five keratocystic odontogenic tumors with a panel of myoepithelial-associated immunohistochemical stains. We also assessed representative control examples of oral mucosa, odontogenic rests, and dentigerous cysts. RESULTS All of the neoplastic and non-neoplastic oral epithelium-derived entities share a p63-positive, high molecular weight cytokeratin (CK5/6)-positive immunophenotype. Calponin reactivity was at least focally present in two of four calcifying epithelial odontogenic tumors, three of five GOCs, and 10 of 11 ameloblastomas; the sole completely non-reactive ameloblastoma represents a lung metastasis. One case of calcifying epithelial odontogenic tumor was focally positive for glial fibrillary acidic protein. However, other more definitive markers of myoepithelial differentiation, including S-100 and smooth muscle actin, were negative. Two of three calcifying epithelial odontogenic tumors and five of five GOCs were also positive for a low molecular weight cytokeratin (CK7). CONCLUSIONS Ameloblastomas, GOCs, and calcifying epithelial odontogenic tumors show a distinctive immunophenotype which overlaps with that of myoepithelial-derived salivary gland neoplasms but does not provide definitive support for myoepithelial differentiation.
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Affiliation(s)
- Dita Gratzinger
- Department of Surgical Pathology, Stanford University School of Medicine, Stanford, CA 94305-5324, USA.
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