RESUMO
OBJECTIVE: To evaluate and compare the expression of E-cadherin, Snail1 and Twist1 in pleomorphic adenomas (PAs), adenoid cystic carcinomas (AdCCa) and carcinoma ex-pleomorphic adenomas (CaexPA) of salivary glands, as well as investigate possible associations with clinicopathological parameters. STUDY DESIGN: E-cadherin, Snail1 and Twist1 antibody immunostaining were analyzed semiquantitatively in 20 PAs, 20 AdCCas and 10 CaexPAs. Cases were classified as low and high expression for analysis of the association with clinicopathological parameters. RESULTS: Compared to PAs, AdCCas and CaexPAs exhibited higher nuclear expression of Snail1 (p = 0.021 and p = 0.028, respectively) and Twist1 (p = 0.009 and p = 0.001). Membranous and cytoplasmic expression of E-cadherin were positively correlated in PAs, AdCCas and CaexPAs (r = 0.645, p = 0.002; r = 0.824, p < 0.001; r = 0.677, p = 0.031). In PAs, positive correlation was found between nuclear expression of Snail1 and membrane expression of E-cadherin (r = 0.634; p = 0.003), as well as between nuclear expression of Snail1 and Twist1 (r = 0.580; p = 0.007). Negative correlations were detected between membrane expression of E-cadherin and cytoplasmic expression of Snail1 in AdCCas (r = - 0.489; p = 0.029). CONCLUSIONS: E-cadherin, Twist1, and Snail1 may participate in modulating events related to cell differentiation and adhesion in PAs and to biological behavior in AdCCas and CaexPAs, which indicates the involvement of EMT in these processes. Furthermore, the expression of these proteins in these carcinomas may reflect the plasticity feature of EMT.
Assuntos
Adenoma Pleomorfo , Caderinas , Carcinoma Adenoide Cístico , Transição Epitelial-Mesenquimal , Proteínas Nucleares , Neoplasias das Glândulas Salivares , Fatores de Transcrição da Família Snail , Proteína 1 Relacionada a Twist , Humanos , Neoplasias das Glândulas Salivares/patologia , Neoplasias das Glândulas Salivares/metabolismo , Fatores de Transcrição da Família Snail/metabolismo , Caderinas/metabolismo , Feminino , Masculino , Proteína 1 Relacionada a Twist/metabolismo , Pessoa de Meia-Idade , Carcinoma Adenoide Cístico/patologia , Carcinoma Adenoide Cístico/metabolismo , Proteínas Nucleares/metabolismo , Adulto , Adenoma Pleomorfo/metabolismo , Adenoma Pleomorfo/patologia , Idoso , Fatores de Transcrição Twist/metabolismo , Imuno-Histoquímica , Fatores de Transcrição/metabolismo , Biomarcadores Tumorais/metabolismoRESUMO
OBJECTIVE: To analyze the immunohistochemical expression of YAP and its correlation with markers involved in cell proliferation and apoptosis in benign epithelial odontogenic lesions. STUDY DESIGN: The sample consisted of 95 cases of odontogenic lesions (25 dentigerous cysts, 30 non-syndromic odontogenic keratocysts, 30 conventional ameloblastomas, and 10 unicystic ameloblastomas) and 10 dental follicles used as normal odontogenic tissue. The histological sections were submitted to immunohistochemistry with YAP, cyclin D1, Ki-67, and Bcl-2 antibodies. Immunoexpression was analyzed qualitatively and quantitatively using an adapted method. The collected data were analyzed descriptively and statistically (p ≤ 0.05). RESULTS: The highest YAP expression was observed in odontogenic keratocysts, followed by unicystic ameloblastomas and conventional ameloblastomas, which exhibited moderate immunoreactivity predominantly in peripheral cells. Furthermore, significant differences in YAP immunoexpression were observed between the groups analyzed, with significant positive correlations between YAP and cyclin D1 in dentigerous cysts and unicystic ameloblastomas and between YAP and Ki-67 in unicystic ameloblastomas (p < 0.05). However, there were no statistically significant correlations between YAP and Bcl-2 immunoexpression in the groups studied. CONCLUSION: YAP may influence epithelial cell proliferation in odontogenic cysts and tumors, suggesting its possible participation in the progression of the odontogenic lesions studied.
Assuntos
Proteínas Adaptadoras de Transdução de Sinal , Ameloblastoma , Apoptose , Proliferação de Células , Ciclina D1 , Cisto Dentígero , Antígeno Ki-67 , Cistos Odontogênicos , Proteínas Proto-Oncogênicas c-bcl-2 , Proteínas de Sinalização YAP , Humanos , Ameloblastoma/patologia , Ameloblastoma/metabolismo , Cistos Odontogênicos/patologia , Cistos Odontogênicos/metabolismo , Cisto Dentígero/patologia , Cisto Dentígero/metabolismo , Antígeno Ki-67/metabolismo , Antígeno Ki-67/análise , Ciclina D1/metabolismo , Proteínas Adaptadoras de Transdução de Sinal/metabolismo , Proteínas Proto-Oncogênicas c-bcl-2/análise , Proteínas Proto-Oncogênicas c-bcl-2/metabolismo , Fatores de Transcrição/análise , Saco Dentário/patologia , Saco Dentário/metabolismo , Imuno-Histoquímica , Tumores Odontogênicos/patologia , Tumores Odontogênicos/metabolismo , Células Epiteliais/patologia , Células Epiteliais/metabolismoRESUMO
Objective: To analyze the incidence and mortality trends from COVID-19 in Brazil as well as in federation units and their capitals. Method: An ecological study was performed using COVID-19 incidence and mortality data covering the period from 25 February 2020 (first case recorded in Brazil) to 31 July 2021. Data were grouped by month for calculation of crude rates (by 100 000 population) and assessment of time trends in federation units and capitals. Significant changes in time trends were analyzed by joinpoint regression. Results: Two waves of new cases and deaths were identified. The highest incidence rates were recorded in the states of Amapá, Rio Grande do Norte, Rondônia, and Roraima. The states of Amazonas and Rondônia had the highest mortality rates. In general, incidence and mortality rates were worse in the second wave. In the first wave, the mean number of months until the onset of reduction in new cases was higher in capitals, whereas in the second wave the onset of reduction in new cases took longer in the federation units. The decline in mortality began earlier in capital cities in both waves. Conclusion: The regional differences detected underscore the notion that COVID-19 incidence and mortality are associated with political, geographic, cultural, social, and economic factors.
Objetivo: Analizar las tendencias de la incidencia de COVID-19 y la mortalidad por esta enfermedad en Brasil (unidades federativas y capitales). Método: Se realizó un estudio ecológico con datos sobre incidencia de COVID-19 y la mortalidad por esta enfermedad en el período comprendido entre el 25 de febrero del 2020 (fecha del primer caso notificado en Brasil) y el 31 de julio del 2021. Los datos se agruparon por mes para calcular las tasas brutas (por 100 000 habitantes) y evaluar las tendencias temporales observadas en las unidades federativas y sus capitales. Las modificaciones significativas en las tendencias temporales se analizaron con el método de regresión de punto de inflexión (joinpoint). Resultados: Se identificaron dos olas de casos nuevos y muertes. Las unidades federativas con las mayores tasas de incidencia fueron Amapá, Rio Grande do Norte, Rondônia y Roraima; Amazonas y Rondônia tuvieron las mayores tasas de mortalidad. En general, la incidencia y la mortalidad fueron peores en la segunda ola. En la primera ola, el promedio de meses transcurridos hasta que empezó a reducirse el número de casos nuevos fue mayor en las capitales, mientras que, en la segunda ola, fue mayor en los estados. En ambas olas, el número de muertes se redujo en menos tiempo en las capitales. Conclusión: La heterogeneidad regional detectada refuerza la idea de que la incidencia de la COVID-19 y la mortalidad por esta enfermedad guardan relación con factores políticos, geográficos, culturales, sociales y económicos.
RESUMO
[RESUMO]. Objetivo. Analisar as tendências de incidência e mortalidade por COVID-19 no Brasil, nas unidades da fede- ração e nas capitais. Método. Realizou-se um estudo ecológico com dados de incidência e de mortalidade por COVID-19 referen- tes ao período de 25 de fevereiro de 2020 (primeiro caso notificado no Brasil) a 31 de julho de 2021. Os dados foram agrupados por mês para cálculo das taxas brutas (por 100 000 habitantes) e avaliação das tendências temporais das unidades da federação e de suas capitais. As modificações significativas nas tendências tem- porais foram analisadas pelo método de regressão por joinpoint. Resultados. Foram identificadas duas ondas de novos casos e óbitos. As unidades da federação com as maiores taxas de incidência foram Amapá, Rio Grande do Norte, Rondônia e Roraima; Amazonas e Rondônia tiveram as maiores taxas de mortalidade. Em geral, as taxas de incidência e mortalidade foram piores na segunda onda. Na primeira onda, a média de meses até o início de uma redução de casos novos foi maior nas capitais, enquanto na segunda onda, o início da redução demorou mais nos estados. Quanto aos óbitos, as capitais necessitaram de menos tempo para apresentar redução tanto na primeira quanto na segunda onda. Conclusão. A heterogeneidade regional detectada reforça a ideia de que a incidência e a mortalidade por COVID-19 estão associadas a fatores políticos, geográficos, culturais, sociais e econômicos.
[ABSTRACT]. Objective. To analyze the incidence and mortality trends from COVID-19 in Brazil as well as in federation units and their capitals. Method. An ecological study was performed using COVID-19 incidence and mortality data covering the period from 25 February 2020 (first case recorded in Brazil) to 31 July 2021. Data were grouped by month for calculation of crude rates (by 100 000 population) and assessment of time trends in federation units and capitals. Significant changes in time trends were analyzed by joinpoint regression. Results. Two waves of new cases and deaths were identified. The highest incidence rates were recorded in the states of Amapá, Rio Grande do Norte, Rondônia, and Roraima. The states of Amazonas and Rondônia had the highest mortality rates. In general, incidence and mortality rates were worse in the second wave. In the first wave, the mean number of months until the onset of reduction in new cases was higher in capitals, whe- reas in the second wave the onset of reduction in new cases took longer in the federation units. The decline in mortality began earlier in capital cities in both waves. Conclusion. The regional differences detected underscore the notion that COVID-19 incidence and mortality are associated with political, geographic, cultural, social, and economic factors.
[RESUMEN]. Objetivo. Analizar las tendencias de la incidencia de COVID-19 y la mortalidad por esta enfermedad en Brasil (unidades federativas y capitales). Método. Se realizó un estudio ecológico con datos sobre incidencia de COVID-19 y la mortalidad por esta enfermedad en el período comprendido entre el 25 de febrero del 2020 (fecha del primer caso notificado en Brasil) y el 31 de julio del 2021. Los datos se agruparon por mes para calcular las tasas brutas (por 100 000 habitantes) y evaluar las tendencias temporales observadas en las unidades federativas y sus capitales. Las modificaciones significativas en las tendencias temporales se analizaron con el método de regresión de punto de inflexión (joinpoint). Resultados. Se identificaron dos olas de casos nuevos y muertes. Las unidades federativas con las mayores tasas de incidencia fueron Amapá, Rio Grande do Norte, Rondônia y Roraima; Amazonas y Rondônia tuvieron las mayores tasas de mortalidad. En general, la incidencia y la mortalidad fueron peores en la segunda ola. En la primera ola, el promedio de meses transcurridos hasta que empezó a reducirse el número de casos nuevos fue mayor en las capitales, mientras que, en la segunda ola, fue mayor en los estados. En ambas olas, el número de muertes se redujo en menos tiempo en las capitales. Conclusión. La heterogeneidad regional detectada refuerza la idea de que la incidencia de la COVID-19 y la mortalidad por esta enfermedad guardan relación con factores políticos, geográficos, culturales, sociales y económicos.
Assuntos
COVID-19 , Pandemias , Incidência , Mortalidade , Brasil , Incidência , Mortalidade , Pandemias , Incidência , Mortalidade , BrasilRESUMO
The morphological diversity and different biological behaviors of human lesions has been attributed to the presence of cells with stem cell (SC) characteristics. Among SC markers, ALDH1 has been used in studies investigating different neoplasms and high expression of this marker was associated with clinicopathological features and prognosis in some groups. The aim of this study was to analyze the presence and distribution of SCs based on the expression of ALDH1 in epithelial odontogenic cysts and tumors. The sample consisted of 80 cases (20 dentigerous cysts (DCs), 20 odontogenic keratocysts (OKCs), 20 ameloblastomas (AMs), and 20 adenomatoid odontogenic tumors (AOTs). An immunoreactivity score was obtained from the percentage of positive cells and intensity of immunostaining. A level of 5% (p < 0.05) was adopted for the statistical tests. Immunoexpression of ALDH1 was observed in cytoplasm and nucleus-cytoplasm. The median scores indicated significantly higher expression in OKCs and DCs compared to AMs (p < 0.0001) and AOTs (p < 0.0001). In the tumor stroma and cystic capsule, immunoreactivity was detected in all odontogenic cysts studied and in 85% and 90% of AMs and AOTs, respectively. The expression of ALDH1 suggests the presence of SCs in the odontogenic lesions studied. Epithelial immunoexpression was higher in odontogenic cysts than in odontogenic tumors.
Assuntos
Ameloblastoma , Cistos Odontogênicos , Tumores Odontogênicos , Família Aldeído Desidrogenase 1 , Humanos , Imuno-Histoquímica , Células-Tronco NeoplásicasRESUMO
Aldehyde dehydrogenase 1 (ALDH-1) is a marker of stem cells in a variety of diseases, but its role in individuals with chronic inflammatory periapical lesions remains unknown. The aim of this study was to investigate the presence of cells with a stem cell profile based on the immunoexpression of ALDH-1 in periapical granulomas (PGs) and radicular cysts (RCs). A total of 51 cases of periapical lesions (25 PGs and 26 RCs) were subjected to immunohistochemical study. The anti-ALDH-1 antibody was applied using the immunoperoxidase technique. An immunoexpression score (intensity vs. percentage of cells) was used, with the cases being classified as low expression (score: 0 to 4) and high expression (score: 6 to 9). The Chi-square test was used with a 5% level of significance. Immunoexpression of ALDH-1 was detected in all cases of PGs and RCs. In PG cases, the expression was diffuse in connective tissue cells, with most cases exhibiting high expression (n = 18; 69.2%), while in RC cases the expression revealed focal distribution in cells of the capsule and epithelial cells of the cystic lining, with most cases classified as low expression (n = 18; 72%). Significant differences in the expression scores of ALDH-1 were observed in PGs (p = 0.003). The variable expression of ALDH-1 suggests the presence of cells with stem cell profiles in PGs and RCs. These findings suggest that periapical tissues infiltrated by chronic inflammation can recruit important cells for the repair or evolution of periapical lesions.
Assuntos
Granuloma Periapical , Cisto Radicular , Família Aldeído Desidrogenase 1 , Células Epiteliais , Humanos , InflamaçãoRESUMO
Abstract: Aldehyde dehydrogenase 1 (ALDH-1) is a marker of stem cells in a variety of diseases, but its role in individuals with chronic inflammatory periapical lesions remains unknown. The aim of this study was to investigate the presence of cells with a stem cell profile based on the immunoexpression of ALDH-1 in periapical granulomas (PGs) and radicular cysts (RCs). A total of 51 cases of periapical lesions (25 PGs and 26 RCs) were subjected to immunohistochemical study. The anti-ALDH-1 antibody was applied using the immunoperoxidase technique. An immunoexpression score (intensity vs. percentage of cells) was used, with the cases being classified as low expression (score: 0 to 4) and high expression (score: 6 to 9). The Chi-square test was used with a 5% level of significance. Immunoexpression of ALDH-1 was detected in all cases of PGs and RCs. In PG cases, the expression was diffuse in connective tissue cells, with most cases exhibiting high expression (n = 18; 69.2%), while in RC cases the expression revealed focal distribution in cells of the capsule and epithelial cells of the cystic lining, with most cases classified as low expression (n = 18; 72%). Significant differences in the expression scores of ALDH-1 were observed in PGs (p = 0.003). The variable expression of ALDH-1 suggests the presence of cells with stem cell profiles in PGs and RCs. These findings suggest that periapical tissues infiltrated by chronic inflammation can recruit important cells for the repair or evolution of periapical lesions.
RESUMO
RESUMO Objetivo. Analisar as tendências de incidência e mortalidade por COVID-19 no Brasil, nas unidades da federação e nas capitais. Método. Realizou-se um estudo ecológico com dados de incidência e de mortalidade por COVID-19 referentes ao período de 25 de fevereiro de 2020 (primeiro caso notificado no Brasil) a 31 de julho de 2021. Os dados foram agrupados por mês para cálculo das taxas brutas (por 100 000 habitantes) e avaliação das tendências temporais das unidades da federação e de suas capitais. As modificações significativas nas tendências temporais foram analisadas pelo método de regressão por joinpoint. Resultados. Foram identificadas duas ondas de novos casos e óbitos. As unidades da federação com as maiores taxas de incidência foram Amapá, Rio Grande do Norte, Rondônia e Roraima; Amazonas e Rondônia tiveram as maiores taxas de mortalidade. Em geral, as taxas de incidência e mortalidade foram piores na segunda onda. Na primeira onda, a média de meses até o início de uma redução de casos novos foi maior nas capitais, enquanto na segunda onda, o início da redução demorou mais nos estados. Quanto aos óbitos, as capitais necessitaram de menos tempo para apresentar redução tanto na primeira quanto na segunda onda. Conclusão. A heterogeneidade regional detectada reforça a ideia de que a incidência e a mortalidade por COVID-19 estão associadas a fatores políticos, geográficos, culturais, sociais e econômicos.
ABSTRACT Objective. To analyze the incidence and mortality trends from COVID-19 in Brazil as well as in federation units and their capitals. Method. An ecological study was performed using COVID-19 incidence and mortality data covering the period from 25 February 2020 (first case recorded in Brazil) to 31 July 2021. Data were grouped by month for calculation of crude rates (by 100 000 population) and assessment of time trends in federation units and capitals. Significant changes in time trends were analyzed by joinpoint regression. Results. Two waves of new cases and deaths were identified. The highest incidence rates were recorded in the states of Amapá, Rio Grande do Norte, Rondônia, and Roraima. The states of Amazonas and Rondônia had the highest mortality rates. In general, incidence and mortality rates were worse in the second wave. In the first wave, the mean number of months until the onset of reduction in new cases was higher in capitals, whereas in the second wave the onset of reduction in new cases took longer in the federation units. The decline in mortality began earlier in capital cities in both waves. Conclusion. The regional differences detected underscore the notion that COVID-19 incidence and mortality are associated with political, geographic, cultural, social, and economic factors.
RESUMEN Objetivo. Analizar las tendencias de la incidencia de COVID-19 y la mortalidad por esta enfermedad en Brasil (unidades federativas y capitales). Método. Se realizó un estudio ecológico con datos sobre incidencia de COVID-19 y la mortalidad por esta enfermedad en el período comprendido entre el 25 de febrero del 2020 (fecha del primer caso notificado en Brasil) y el 31 de julio del 2021. Los datos se agruparon por mes para calcular las tasas brutas (por 100 000 habitantes) y evaluar las tendencias temporales observadas en las unidades federativas y sus capitales. Las modificaciones significativas en las tendencias temporales se analizaron con el método de regresión de punto de inflexión (joinpoint). Resultados. Se identificaron dos olas de casos nuevos y muertes. Las unidades federativas con las mayores tasas de incidencia fueron Amapá, Rio Grande do Norte, Rondônia y Roraima; Amazonas y Rondônia tuvieron las mayores tasas de mortalidad. En general, la incidencia y la mortalidad fueron peores en la segunda ola. En la primera ola, el promedio de meses transcurridos hasta que empezó a reducirse el número de casos nuevos fue mayor en las capitales, mientras que, en la segunda ola, fue mayor en los estados. En ambas olas, el número de muertes se redujo en menos tiempo en las capitales. Conclusión. La heterogeneidad regional detectada refuerza la idea de que la incidencia de la COVID-19 y la mortalidad por esta enfermedad guardan relación con factores políticos, geográficos, culturales, sociales y económicos.
RESUMO
BACKGROUND: To evaluate the morphology and immunohistochemical expression of MMP-9, TIMP-3, COL-I, TNF-alfa and COX-2 in the dentinopulp complex of restorations with self adhesive composite (Vertise Flow/Kerr) compared with conventional resin composite with self-etching adhesive (Filtek Z250/3M ESPE and Clearfil SE Bond/Kuraray-Noritake). MATERIAL AND METHODS: A randomized, controlled, double-blind, split-mouth, two-arm clinical trial was conducted. Twenty-seven volunteers with third molars indicated for extraction received two deep class I restorations, one with each material. The morphology and immunohistochemical expression were measured at 15 days after the restorative procesures. The data were submitted to the Fisher`s Exct test (α=0.05). RESULTS: Through morphological analysis, a slight disorganization of the odontoblastic layer was visualized, along with a slight inflammatory infiltrate in the VERT and CSEB groups (p< 0.05). In immunohistochemical analysis, TNF-alpha, MMP-9, TIMP-3 and COX-2 demonstrated more cases of positive pulp labeling. CONCLUSIONS: Self-adhesive resin composite and conventional resin composite with a self-etching bonding agent promoted slight alterations in the dentin-pulp complex, indicating a repair ability and reversibility of the inflammatory process against aggressions of the adhesive restorative procedure. Key words:Immunohistochemistry, inflammation, randomized clinical trial, self-adhering composite, dentistry.
RESUMO
Adenoid cystic carcinoma (AdCC) is a rare malignancy that accounts for approximately 1% of all head and neck cancers. This neoplasm is characterized by slow but often relentless growth and dissemination. Our aim was to retrospectively evaluate the clinical-pathological features of patients diagnosed with head and neck AdCC and to identify possible prognostic factors. This retrospective observational study analyzed 87 cases of AdCC of the head and neck. Clinical parameters (tumor size, lymph node and distant metastasis, clinical stage, and survival) were obtained from the records. Survival curves were constructed using the Kaplan-Meier method. A p value ≤ 0.05 was considered significant. There was a slight predominance of cases diagnosed in female patients (54%). The mean age at diagnosis was 51.5 years. Analysis using Cox's proportional hazards model considering 10-year disease-specific survival identified histologic pattern and presence of perineural invasion as independent prognostic variables. Primary tumor size and distant metastasis were prognostic predictors of 5- and 10-year disease-free survival. Detailed analysis of the association between clinical-pathological parameters and prognosis can assist professionals with cancer treatment planning and adequate patient management. Considering the long-term aggressive behavior of AdCC, rigorous patient follow-up is important to identify possible locoregional or distant recurrences.
Assuntos
Carcinoma Adenoide Cístico/patologia , Neoplasias de Cabeça e Pescoço/patologia , Adulto , Idoso , Carcinoma Adenoide Cístico/mortalidade , Intervalo Livre de Doença , Feminino , Neoplasias de Cabeça e Pescoço/mortalidade , Humanos , Estimativa de Kaplan-Meier , Masculino , Pessoa de Meia-Idade , Prognóstico , Estudos RetrospectivosRESUMO
OBJECTIVE: To analyze the immunohistochemical expression of the base excision repair (BER) proteins apurinic/apyrimidinic endonuclease 1 (APE1) and X-ray repair cross-complementing protein 1 (XRCC1) and nucleotide excision repair (NER) protein xeroderma pigmentosum group F (XPF) in malignant salivary gland tumors (MSGTs). DESIGN: Sixty-two cases of MSGTs were selected, including 14 acinic cell carcinomas (AcCC), 15 polymorphous adenocarcinomas (PAC), 16 adenoid cystic carcinomas (ACC), and 17 mucoepidermoid carcinomas (MEC). The specimens were submitted to quantitative immunohistochemical analysis. RESULTS: All MSGTs exhibited nuclear or nucleo-cytoplasmic immunostaining of APE1, XRCC1 and XPF, with a high percentage of positive cells (median = 78.31, 70.48 and 75.46, respectively). XRCC1 expression was higher in PAC compared to MEC (p = 0.032). Nuclear APE1 immunostaining was significantly higher than nucleo-cytoplasmic expression in the selected MSGTs (p < 0.0001). APE1 expression was significantly associated with T1-T2 tumors in ACC (p = 0.006). Increased expression of XPF was associated with age older than 60 years in MEC (p = 0.015) and with ACC involving the minor salivary gland (p = 0.012), while a lower expression was found in AcCC and ACC patients treated by surgery combined with adjuvant therapy (p = 0.036 and p = 0.020, respectively). Low expression of XRCC1 in the nucleus (p = 0.028) and concomitant expression of this protein in the nucleus/cytoplasm were associated with a lower overall 5-year survival rate (p = 0.017). CONCLUSIONS: This study showed that BER and NER proteins evaluated are highly expressed in the MSGTs studied, indicating mechanisms of genotoxic control in these tumors. In addition, the dysregulation of XRCC1 expression was a prognostic predictor in MSGTs analyzed.
Assuntos
Reparo do DNA , Proteínas de Ligação a DNA/genética , Neoplasias das Glândulas Salivares , Adenocarcinoma , Carcinoma de Células Acinares , Carcinoma Adenoide Cístico , Carcinoma Mucoepidermoide , DNA Liase (Sítios Apurínicos ou Apirimidínicos) , Humanos , Neoplasias das Glândulas Salivares/genética , Proteína 1 Complementadora Cruzada de Reparo de Raio-XRESUMO
A metastatic giant cell-rich osteosarcoma (GCRO) to the jaws is an exceedingly rare neoplasm. To date, fewer than 10 cases have been reported in the English language literature. In this article, we describe an additional case of a metastatic GCRO that presented the diagnostic challenge of a painless mass in the posterior mandible of a 19-year-old girl who exhibited rapid and aggressive local growth. The lesion was confirmed radiologically as an ill-defined expansive osteolytic mass showing cortical perforation. Microscopically, the presence of osteoclast-like giant cells permeated with atypical oval and rounded mesenchymal cells in a fibrovascular stroma, cellular atypia, and scarce osteoid formation were observed. Immunohistochemistry revealed the Ki-67 proliferative index in 50% of positive cells, positivity for vimentin and CD68, as well as scarce positivity for CDK4. The patient's medical history involved a GCRO in the proximal ulna. This report highlights the aggressive behavior of GCRO and its high capacity for metastasis to different parts of the body. Clinicians, pathologists, and surgeons should be aware of the giant cell-rich variant of osteosarcoma of the jaws, an imminent "wolf in a sheep's skin", because its indolent but unrelenting growth and dissemination, with radiographic and histologic characteristics that may represent a diagnostic pitfall regarding aggressive central giant cell lesions of the jaws.
Assuntos
Neoplasias Ósseas , Tumor de Células Gigantes do Osso , Osteossarcoma , Neoplasias Ósseas/diagnóstico por imagem , Diagnóstico Diferencial , Tumor de Células Gigantes do Osso/diagnóstico por imagem , Tumor de Células Gigantes do Osso/cirurgia , Células Gigantes , Humanos , Mandíbula , Osteossarcoma/diagnóstico por imagemRESUMO
Abstract Matrix degradation is an important event in the progression, invasion and metastasis of malignant head and neck lesions. Imbalances, mutations and polymorphisms of MMPs and their inhibitors are observed in several cancer subtypes. The aim of this study was to evaluate the association of the MMP-7 gene promoter (181 A/G) and MMP-9 (-1562 C/T) polymorphisms in oral tongue squamous cell carcinoma (OTSCC). MMP-7 (rs11568818) and MMP-9 (rs3918242) single-nucleotide polymorphisms (SNPs) were genotyped by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) analysis in 71 cases of OTSCC. Normal tissue specimens were obtained from 60 healthy volunteers to serve as the control. The MMP-7 G allele and MMP-9 T allele were more frequent in the OTSCC group than the control group, but only when these two SNPs were taken together was a significant association found with the nodal metastasis of OTSCC (p < 0.001). Based on our results, SNPs in the promoter region of MMP-7 and MMP-9 appear to be associated with greater risk of developing OTSCC, and with a higher propensity to form metastatic tumors. In this respect, molecular studies investigating polymorphisms may be useful in predicting tumor behavior.
Assuntos
Humanos , Neoplasias da Língua/genética , Carcinoma de Células Escamosas/genética , Metaloproteinase 9 da Matriz/genética , Metaloproteinase 7 da Matriz/genética , Estudos de Casos e Controles , Predisposição Genética para Doença , Polimorfismo de Nucleotídeo Único , GenótipoRESUMO
Matrix degradation is an important event in the progression, invasion and metastasis of malignant head and neck lesions. Imbalances, mutations and polymorphisms of MMPs and their inhibitors are observed in several cancer subtypes. The aim of this study was to evaluate the association of the MMP-7 gene promoter (181 A/G) and MMP-9 (-1562 C/T) polymorphisms in oral tongue squamous cell carcinoma (OTSCC). MMP-7 (rs11568818) and MMP-9 (rs3918242) single-nucleotide polymorphisms (SNPs) were genotyped by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) analysis in 71 cases of OTSCC. Normal tissue specimens were obtained from 60 healthy volunteers to serve as the control. The MMP-7 G allele and MMP-9 T allele were more frequent in the OTSCC group than the control group, but only when these two SNPs were taken together was a significant association found with the nodal metastasis of OTSCC (p < 0.001). Based on our results, SNPs in the promoter region of MMP-7 and MMP-9 appear to be associated with greater risk of developing OTSCC, and with a higher propensity to form metastatic tumors. In this respect, molecular studies investigating polymorphisms may be useful in predicting tumor behavior.
Assuntos
Carcinoma de Células Escamosas , Metaloproteinase 7 da Matriz/genética , Metaloproteinase 9 da Matriz/genética , Neoplasias da Língua , Carcinoma de Células Escamosas/genética , Estudos de Casos e Controles , Predisposição Genética para Doença , Genótipo , Humanos , Polimorfismo de Nucleotídeo Único , Neoplasias da Língua/genéticaRESUMO
PURPOSE: Cripto-1 also known as teratoma-derived growth factor 1 (TDGF-1) belongs to the EGF-CFC family of growth factor-like molecules. Cripto-1 is involved with embryonic development and not expressed in adult tissue, but some tumours are accompanied by reactivation. METHODS: The aim of this study was to evaluate the immunohistochemical expression of Cripto-1 in most common odontogenic cysts and tumours. Thirty ameloblastomas, 30 keratocysts, 30 dentigerous cysts and two ameloblastic carcinomas were evaluated using the polymeric immunoperoxidase technique. Immunohistochemical expressions were analysed by the IRS (immunoreactive score). Statistical analyses were performed by the Kruskal-Wallis and Mann-Whitney tests (p ≤ 0.05). RESULTS: Age ranged from 9 to 75 years old, with a prevalence of females (n = 49/53.3%). The mandible was the most affected anatomical site (n = 69/75.0%). Cripto-1 immunoexpression was observed in all ameloblastoma, keratocyst and ameloblastic carcinoma cases, although nine dentigerous cyst cases (30%) were negative. Expression scores were higher in ameloblastoma, keratocyst and ameloblastic carcinoma cases (median ranging from 8 to 11) when compared with dentigerous cyst cases (median of 2), with a statistically significant difference (p < 0.001). CONCLUSIONS: Cripto-1 is critically important in the progression of several tumours since it is related to significant cell survival and differentiation pathways. The high expression of Cripto-1 in more aggressive odontogenic lesions suggests that this molecule may be involved in the activation of important pathways related to the etiopathogenesis of these lesions.
Assuntos
Ameloblastoma , Cisto Dentígero , Cistos Odontogênicos , Tumores Odontogênicos , Teratocarcinoma , Adolescente , Adulto , Idoso , Criança , Feminino , Humanos , Pessoa de Meia-Idade , Adulto JovemRESUMO
OBJECTIVE: The aim of this study was to assess vascular endothelial growth factor C (VEGF-C) and VEGF-D expressions, tumor lymphatic density (D2-40) and endothelial lymphatic proliferation (D2-40/Ki-67 double labeling) in a series of salivary gland neoplasm cases. MATERIALS AND METHODS: Twenty pleomorphic adenomas (PA), 20 adenoid cystic carcinomas (ACC) and 20 mucoepidermoid carcinomas (MEC) were assessed, as well as 10 normal minor salivary gland (SG) tissues for comparison. RESULTS: All cases presented positive VEGF-C expression in the peritumoral and intratumoral regions, and no differences in immunoexpression were detected between groups. However, the ACC group presented a significant difference in VEGF-C immunoexpression according to the predominant histological pattern. Most cases presented poor VEGF-D labeling in the peritumoral and intratumoral regions. Concerning peritumoral, intratumoral and total lymphatic endothelial density, the assessed groups revealed an increasing gradient, with lower values for PA, followed by MEC and ACC. CONCLUSION: No correlation was detected between VEGF-C and VEGF-D immunoexpression in relation to lymphatic tumor density and endothelial lymphatic proliferation. Western blotting (WB) revealed no difference between VEGF-C and VEGF-D expression among the lesions, corroborating the immunohistochemistry findings.
Assuntos
Células Endoteliais/metabolismo , Células Endoteliais/patologia , Vasos Linfáticos/patologia , Neoplasias das Glândulas Salivares/patologia , Fator C de Crescimento do Endotélio Vascular/metabolismo , Fator D de Crescimento do Endotélio Vascular/metabolismo , Proliferação de Células , HumanosRESUMO
PURPOSE: This study aimed to analyze the demographics, clinicopathological, treatment, and survival characteristics of head and neck sarcomas diagnosed in a reference center in the Brazilian Northeast. MATERIALS AND METHODS: This retrospective cohort study reviewed the clinical records of patients with head and neck sarcomas. Epidemiologic data consisted in clinical location, age, gender, histopathological diagnosis, clinical TNM staging and treatment. Outcome variables were local recurrence and survival. The statistical analyses were performed by a binary logistic regression analysis. The survival analysis was assessed through the Kaplan-Meier curve. RESULTS: Sixty-nine patients with head and neck sarcomas (male 39; female 30) were analyzed. The most common histologic subtypes were rhabdomyosarcoma, dermatofibrosarcoma, and pleomorphic sarcoma. The mean age of the patients at the time of diagnosis was 38.1 years old. A total of 31 patient died (sarcoma-related death) up to the end of the follow-up, with a mean follow-up rate of 1.63 years. A multivariate analysis revealed that anatomical site, treatment modality, histopathological diagnosis, and clinical stage of the disease were associated with specific survival, reaching statistical significance. CONCLUSION: This study demonstrates the impact of important clinical-pathological parameters on the overall prognosis of head and neck sarcomas.
Assuntos
Neoplasias de Cabeça e Pescoço , Sarcoma , Adulto , Brasil/epidemiologia , Feminino , Neoplasias de Cabeça e Pescoço/epidemiologia , Neoplasias de Cabeça e Pescoço/terapia , Humanos , Masculino , Recidiva Local de Neoplasia/epidemiologia , Prognóstico , Estudos Retrospectivos , Sarcoma/diagnóstico , Sarcoma/epidemiologia , Sarcoma/terapiaRESUMO
Data on the occurrence and clinicopathological characteristics of actinic cheilitis (AC) and lip squamous cell carcinoma (LSCC) are well studied; however, they are based on studies limited to a single centre. Herein, we described the frequency of AC and LSCC submitted to microscopic examination from representative geographic regions of Brazil. A retrospective multicentre study was performed on biopsies obtained from 1953 to 2018 at 10 Brazilian oral and maxillofacial pathology centres. A total of 198,709 biopsy specimens were surveyed. Sociodemographic data and clinicopathologic characteristics were analysed. A total of 2017 cases of ACs (1.0%) and 850 cases of LSCCs (0.4%) were recorded. A strong fair-skinned (> 87%) male (> 70%) predilection was observed in both conditions. The mean age was 54.8 ± 18.7 for individuals with AC and 57.8 ± 19.0 for individuals with LSCC. The most commonly affected site was the lower lip (> 90%). This is a large multicentre study of AC and LSCC from Brazil. The frequency and clinicopathological features of AC and LSCC were similar to those described worldwide. This study provides robust and representative epidemiological data of these conditions for the scientific community.
Assuntos
Queilite/patologia , Neoplasias Labiais/patologia , Carcinoma de Células Escamosas de Cabeça e Pescoço/patologia , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Brasil/epidemiologia , Queilite/epidemiologia , Criança , Pré-Escolar , Feminino , Humanos , Lactente , Recém-Nascido , Neoplasias Labiais/epidemiologia , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Carcinoma de Células Escamosas de Cabeça e Pescoço/epidemiologia , Adulto JovemRESUMO
We present the frequency of cases of isolated odontogenic keratocysts submitted to microscopic examination at 10 Brazilian referral centres in Oral and Maxillofacial Pathology. In a retrospective (1953-2017) analysis, data on clinicoradiographic features and treatment of these lesions were collected and analysed descriptively. Among the 258,867 cases retrieved, 2,497 (0.96%) were isolated odontogenic keratocysts. In summary, an overview of individuals affected with isolated odontogenic keratocysts is reported herein. This lesion showed predilection for the posterior mandible of young adult men.
Assuntos
Cistos Odontogênicos/patologia , Tumores Odontogênicos/patologia , Brasil , Humanos , Masculino , Mandíbula/patologia , Estudos Retrospectivos , Adulto JovemRESUMO
ABSTRACT An unusual case of intraosseous mucoepidermoid carcinoma is reported in a 22-year-old female, located in the posterior maxilla region. The article summarizes the main characteristics of the disease, including clinical-pathologic characteristics, treatment and prognosis.
RESUMEN Reportamos un caso raro de carcinoma epidermoide intraóseo ubicado en región posterior de la maxila en una paciente de 22 años de edad. El artículo resume las principales características del proceso neoplásico, incluyendo las características clínico-patológicas, el tratamiento y el pronóstico.
RESUMO Relatamos um raro caso de carcinoma mucoepidermoide intraósseo localizado em região posterior da maxila em uma paciente de 22 anos de idade. O artigo resume as principais características do processo neoplásico, incluindo as características clinicopatológicas, o tratamento e o prognóstico.