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dos Santos HT, de Souza do Nascimento J, Meireles F, Scarini JF, Egal ES, Montalli VA, Fonseca FP, Mariano FV, Altemani A. Evaluation of the expression of Bmi-1 stem cell marker in sinonasal melanomas and its correlation with the expression of cell cycle proteins. Surg Exp Pathol 2019. [DOI: 10.1186/s42047-019-0034-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
Sinonasal melanomas (SNM) are aggressive neoplasms, which present distinct clinicopathological and molecular aspects when compared to cutaneous melanomas (CM). B-cell-specific moloney murine leukemia virus integration site-1 (Bmi-1) is a stem cell marker involved in the regulation of the cell cycle and has been found to be expressed in 70% of CM and 100% of benign nevi. Regarding the cell cycle, Bmi-1 is known to be an upstream repressor of p16, which is a tumor suppressor encoded by the INK4a/Arf locus. Considering this, the aim of this study is to evaluate the immunohistochemical expression of Bmi-1 in a series of SNM and its correlation with the expression of cell cycle proteins (p16 and Ki-67, a nuclear antigen of proliferating cells).
Methods
In 16 cases of SNM, nuclear expression of Bmi-1 and nuclear and cytoplasmic of p16 was classified as: absent, low (> 5 to < 50% of cells) and high (≥50%). Ki-67 proliferation index was represented by the ratio positive cells/ total cells.
Results
Histologically, all cases presented varying amount of necrosis and 75% contained undifferentiated cells. Bmi-1 was detected in 6 cases (37.5%) with high level of expression in 2; p16 expression was seen in 10 cases (62.5%) with high level in 7. The frequency of p16 expression did not differ significantly between tumors with or without Bmi-1 expression. Ki-67 index ranged from 8 to 22%. Neither Bmi-1 nor p16 expression showed correlation with Ki-67 index. Bmi-1 negative tumors presented more extensive necrosis (71.4%); no association between Bmi-1 expression and undifferentiated phenotype was observed.
Conclusions
In our SNM series, low immunohistochemical expression of Bmi-1 was a common phenomenon favoring the hypothesis that mucosal melanoma possibly presents molecular pathways different from the cutaneous counterpart. In SNM, Bmi-1 and p16 expression levels did not correlate with each other or with the cell proliferative index.
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de Brito BS, Giovanelli N, Egal ES, Sánchez-Romero C, Nascimento JDSD, Martins AS, Tincani ÁJ, Del Negro A, Gondak RDO, Almeida OPD, Kowalski LP, Altemani A, Mariano FV. Loss of expression of Plag1 in malignant transformation from pleomorphic adenoma to carcinoma ex pleomorphic adenoma. Hum Pathol 2016; 57:152-159. [PMID: 27473265 DOI: 10.1016/j.humpath.2016.07.011] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Revised: 07/01/2016] [Accepted: 07/06/2016] [Indexed: 11/30/2022]
Abstract
PLAG1 (pleomorphic adenoma gene 1) is frequently activated in pleomorphic adenoma (PA). Carcinoma ex pleomorphic adenoma (CXPA) arises in PA, and PLAG1 expression is believed to be maintained from PA to CXPA, as it can contribute to the carcinogenesis process. To evaluate if PLAG1 is a good marker of malignant transformation from PA to CXPA as well as to evaluate if PLAG1 expression is associated with progression and histopathologic subtype of CXPA. Forty PAs, 21 residual PAs (without malignant transformation), and 40 CXPAs were analyzed by immunohistochemistry with PLAG1 antibody. The proportion of positive neoplastic cells was assessed according to a 2-tiered scale: >10% to 50%, and >50% positive cells. The CXPA group was classified according to histopathologic subtype and invasiveness degree. Thirty-seven PAs (92.5%), 15 residual PAs (71%), and 14 CXPAs (35%) were positive for PLAG1. In relation to the CXPA group, among the intracapsular cases, myoepithelial carcinoma and epithelial-myoepithelial carcinoma showed the highest level of PLAG1 expression. PLAG1 expression is lost when PA undergoes malignant transformation, possibly due to other pathway activation and different clone cells. In addition, PLAG1 expression seems to be present mainly in low-grade carcinomas and in cases with early phase of invasion, due to its regulation of oncogene-induced cell senescence. In CXPA, PLAG1 expression was most associated with myoepithelial differentiation. This way, loss of PLAG1 expression can be considered a hallmark of CXPA carcinogenesis, mainly when there is only epithelial differentiation.
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Affiliation(s)
- Beatriz Samara de Brito
- Pathology Department, Faculty of Medical Sciences, State University of Campinas (UNICAMP), Campinas, SP 13083-887, Brazil
| | - Natália Giovanelli
- Pathology Department, Faculty of Medical Sciences, State University of Campinas (UNICAMP), Campinas, SP 13083-887, Brazil
| | - Erika Said Egal
- Pathology Department, Faculty of Medical Sciences, State University of Campinas (UNICAMP), Campinas, SP 13083-887, Brazil
| | - Celeste Sánchez-Romero
- Oral Pathology Department, Piracicaba Dental School, State University of Campinas (UNICAMP), Campinas, SP 13083-887, Brazil
| | - Juliana de Souza do Nascimento
- Oral Pathology Department, Piracicaba Dental School, State University of Campinas (UNICAMP), Campinas, SP 13083-887, Brazil
| | - Antonio Santos Martins
- Head and Neck Surgery Department, Faculty of Medical Sciences, State University of Campinas (UNICAMP), Campinas, SP 13083-887, Brazil
| | - Álfio José Tincani
- Head and Neck Surgery Department, Faculty of Medical Sciences, State University of Campinas (UNICAMP), Campinas, SP 13083-887, Brazil
| | - André Del Negro
- Head and Neck Surgery Department, Faculty of Medical Sciences, State University of Campinas (UNICAMP), Campinas, SP 13083-887, Brazil
| | | | - Oslei Paes de Almeida
- Oral Pathology Department, Piracicaba Dental School, State University of Campinas (UNICAMP), Campinas, SP 13083-887, Brazil
| | - Luiz Paulo Kowalski
- Head and Neck Surgery Department, AC Camargo Cancer Center, São Paulo, SP 01509-010, Brazil
| | - Albina Altemani
- Pathology Department, Faculty of Medical Sciences, State University of Campinas (UNICAMP), Campinas, SP 13083-887, Brazil
| | - Fernanda Viviane Mariano
- Pathology Department, Faculty of Medical Sciences, State University of Campinas (UNICAMP), Campinas, SP 13083-887, Brazil.
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de Souza do Nascimento J, Carlos R, Delgado-Azañero W, Mosqueda Taylor A, de Almeida OP, Romañach MJ, de Andrade BAB. Immunohistochemical expression of cyclooxygenase-2 (COX-2) in oral nevi and melanoma. J Oral Pathol Med 2016; 45:440-3. [PMID: 26608958 DOI: 10.1111/jop.12385] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/19/2015] [Indexed: 11/30/2022]
Abstract
BACKGROUND Cyclooxygenase-2 (COX-2) catalyses the conversion of arachidonic acid to prostaglandin, and its overexpression has been demonstrated in different malignant tumors, including cutaneous melanoma. However, no data about the expression of this protein in oral melanocytic lesions are available to date. The aim of this study was to evaluate the immunohistochemical expression of COX-2 in oral nevi and melanomas, comparing the results with correspondent cutaneous lesions. METHODS COX-2 was evaluated by immunohistochemistry in 49 oral melanocytic lesions, including 36 intramucosal nevi and 13 primary oral melanomas, and in four cutaneous nevi and eight melanomas. RESULTS All cases of oral and cutaneous melanomas were positive for COX-2. On the other hand, all oral and cutaneous melanocytic nevi were negative. CONCLUSION COX-2 is highly positive in oral melanomas and negative in oral nevi and might represent a useful marker to distinguish melanocytic lesions of the oral cavity.
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Affiliation(s)
| | - Román Carlos
- Pathology Section, Centro Clínico de Cabeza y Cuello/Hospital Herrera Llerandi, Guatemala City, Guatemala
| | | | | | - Oslei Paes de Almeida
- Oral Pathology, School of Dentistry, State University of Campinas, Piracicaba, São Paulo, Brazil
| | - Mário José Romañach
- Oral Pathology, Department of Oral Diagnosis and Pathology, School of Dentistry, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Bruno Augusto Benevenuto de Andrade
- Oral Pathology, Department of Oral Diagnosis and Pathology, School of Dentistry, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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Mariano FV, Gómez CAC, de Souza do Nascimento J, Dos Santos HT, Egal ES, Montalli VAM, Vargas PA, de Almeida OP, Altemani A. Lysozyme Expression Can be Useful to Distinguish Mammary Analog Secretory Carcinoma from Acinic Cell Carcinoma of Salivary Glands. Head Neck Pathol 2016; 10:429-436. [PMID: 27177644 PMCID: PMC5082043 DOI: 10.1007/s12105-016-0718-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Accepted: 04/11/2016] [Indexed: 02/06/2023]
Abstract
Lysozyme is an enzymatic marker of acinar and intercalated duct cells of normal salivary glands. The aim of this study was to verify whether lysozyme expression could be useful to distinguish acinic cell carcinoma (ACC) from its main mimic, mammary analog secretory carcinoma (MASC). For comparison, DOG1 expression was analyzed as well. Seventeen cases of ACC, 15 MASC, and 125 other salivary tumors were studied. Lysozyme expression was found in tumor cells as well as in secreted material of MASC (86.6 % of cases) and in ductal cells of epithelial-myoepithelial carcinoma (EMC-53.8 %), pleomorphic adenoma (PA-29.1 %) and polymorphous low-grade adenocarcinoma (PLGA-23.8 %). However, in ACC, lysozyme was not expressed. Three patterns of DOG1 staining were seen: apical-luminal, cytoplasmic, and mixed cytoplasmic/membranous. The apical-luminal pattern was detected in ductal cells of ACC (58.8 % of cases), EMC (38.4 %), adenoid-cystic carcinoma (AdCC-35.3 %), PA (8.3 %), and PLGA (4.8 %). These tumors also showed mixed membranous/cytoplasmic staining for DOG1. MASC, mucoepidermoid, and salivary duct carcinomas exhibited only DOG1 cytoplasmic staining. In conclusion, lysozyme cannot be used as a marker of acinar differentiation in salivary tumors. However, lysozyme expression can be helpful to distinguish MASC from ACC due to its high frequency in the former and absence in ACC. It is likely that in MASC, lysozyme expression may reflect a lactational-like secretory differentiation since lysozyme belongs to breast milk proteins. Regarding DOG1 expression, the apical-luminal pattern is related to acinar and intercalated duct differentiation whereas the cytoplasmic staining does not seem to be associated with a specific cellular phenotype.
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Affiliation(s)
- Fernanda Viviane Mariano
- Department of Pathology, Medical Sciences Faculty, University of Campinas (UNICAMP), R. Tessália Vieira de Camargo, 126, Campinas, SP, 13083-887, Brazil
| | - Camila Andrea Concha Gómez
- Department of Oral Pathology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, SP, Brazil
| | | | - Harim Tavares Dos Santos
- Department of Oral Pathology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, SP, Brazil
| | - Erika Said Egal
- Department of Pathology, Medical Sciences Faculty, University of Campinas (UNICAMP), R. Tessália Vieira de Camargo, 126, Campinas, SP, 13083-887, Brazil
| | | | - Pablo Agustin Vargas
- Department of Oral Pathology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, SP, Brazil
| | - Oslei Paes de Almeida
- Department of Oral Pathology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, SP, Brazil
| | - Albina Altemani
- Department of Pathology, Medical Sciences Faculty, University of Campinas (UNICAMP), R. Tessália Vieira de Camargo, 126, Campinas, SP, 13083-887, Brazil.
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dos Santos HT, Silva RN, Piña AR, de Souza do Nascimento J, de Almeida OP, Egal ESA, de Andrade BAB, Mariano FV, Altemani A. Lipid droplets are involved in the process of high-grade transformation of adenoid cystic carcinoma. Histopathology 2016; 69:160-2. [DOI: 10.1111/his.12916] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Harim Tavares dos Santos
- Department of Oral Diagnosis; Piracicaba Dental School; Oral Pathology Section; University of Campinas (UNICAMP); Piracicaba Brazil
| | - Rodrigo Neves Silva
- Department of Oral Diagnosis; Piracicaba Dental School; Oral Pathology Section; University of Campinas (UNICAMP); Piracicaba Brazil
| | - Alícia Rumayor Piña
- Department of Oral Diagnosis; Piracicaba Dental School; Oral Pathology Section; University of Campinas (UNICAMP); Piracicaba Brazil
| | - Juliana de Souza do Nascimento
- Department of Oral Diagnosis; Piracicaba Dental School; Oral Pathology Section; University of Campinas (UNICAMP); Piracicaba Brazil
| | - Oslei Paes de Almeida
- Department of Oral Diagnosis; Piracicaba Dental School; Oral Pathology Section; University of Campinas (UNICAMP); Piracicaba Brazil
| | - Erika Said Abdul Egal
- Department of Pathology; Medical Sciences Faculty; University of Campinas (UNICAMP); Campinas Brazil
| | | | - Fernanda Viviane Mariano
- Department of Pathology; Medical Sciences Faculty; University of Campinas (UNICAMP); Campinas Brazil
| | - Albina Altemani
- Department of Pathology; Medical Sciences Faculty; University of Campinas (UNICAMP); Campinas Brazil
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