RESUMO
BACKGROUND: The nuclear envelope (NE), which is composed of the outer and inner nuclear membranes, the nuclear pore complex and the nuclear lamina, regulates a plethora of cellular processes, including those that restrict cancer development (genomic stability, cell cycle regulation, and cell migration). Thus, impaired NE is functionally related to tumorigenesis, and monitoring of NE alterations is used to diagnose cancer. However, the chronology of NE changes occurring during cancer evolution and the connection between them remained to be precisely defined, due to the lack of appropriate cell models. METHODS: The expression and subcellular localization of NE proteins (lamins A/C and B1 and the inner nuclear membrane proteins emerin and ß-dystroglycan [ß-DG]) during prostate cancer progression were analyzed, using confocal microscopy and western blot assays, and a prostate cancer cell system comprising RWPE-1 epithelial prostate cells and several prostate cancer cell lines with different invasiveness. RESULTS: Deformed nuclei and the mislocalization and low expression of lamin A/C, lamin B1, and emerin became more prominent as the invasiveness of the prostate cancer lines increased. Suppression of lamin A/C expression was an early event during prostate cancer evolution, while a more extensive deregulation of NE proteins, including ß-DG, occurred in metastatic prostate cells. CONCLUSIONS: The RWPE-1 cell line-based system was found to be suitable for the correlation of NE impairment with prostate cancer invasiveness and determination of the chronology of NE alterations during prostate carcinogenesis. Further study of this cell system would help to identify biomarkers for prostate cancer prognosis and diagnosis.
Assuntos
Lamina Tipo A , Lamina Tipo B , Proteínas de Membrana , Membrana Nuclear , Proteínas Nucleares , Neoplasias da Próstata , Masculino , Humanos , Neoplasias da Próstata/metabolismo , Neoplasias da Próstata/patologia , Neoplasias da Próstata/genética , Membrana Nuclear/metabolismo , Linhagem Celular Tumoral , Proteínas de Membrana/metabolismo , Lamina Tipo B/metabolismo , Lamina Tipo A/metabolismo , Lamina Tipo A/genética , Proteínas Nucleares/metabolismo , Proteínas Nucleares/genética , Distroglicanas/metabolismo , Regulação Neoplásica da Expressão Gênica , Núcleo Celular/metabolismoRESUMO
Background: Nasal asymmetry is one of the most frequent characteristics of patients with cleft lip and palate. The anthropometric measurement (AM) is an accessible and reliable method that can be used by specialists to evaluate nasal asymmetry in patients with cleft lip and palate. The aim of this study was to evaluate the effectiveness of an educational intervention applied to cleft lip and palate specialists to increase the accuracy of AM in the evaluation of nasal asymmetry. Methods: Quasi-experimental study. Results: In the first phase of the study, five of the 13 AM reported a mean difference (MD) > 1.5 mm, and 12 of the 13 AM showed results greater than 2 SD (standard deviations). In the second phase, the results showed 11 of the 13 AM with MD < 1 mm, and 9 of the 13 AM were less than 2 SD. Conclusions: The intervention carried out with the manual of AMs increased the knowledge of the specialists on the anatomy points and AM that can be used to evaluate the nasal asymmetry in patients with cleft lip and palate. Educational intervention help to increase the agreement between examiners to perform a reliable evaluation of nasal asymmetry in patients with these conditions.
Introducción: La asimetría nasal es una de las características más frecuentes de los pacientes con labio y paladar hendido; la medición antropométrica (MA) es un método accesible y confiable que puede ser utilizado por los especialistas para evaluarlo. El objetivo de este estudio fue evaluar la efectividad de una intervención educativa aplicada a especialistas que tratan pacientes con labio y paladar hendido para incrementar la precisión en las MA en la evaluación de la asimetría nasal. Métodos: Estudio cuasiexperimental. Resultados: En la primera fase del estudio, 5 de las 13 medidas antropométricas reportaron una diferencia de medias (DM) > 1.5 mm, y 12 de las 13 MA mostraron resultados mayores a dos desviaciones estándar (DE). Los resultados en la segunda fase evidenciaron 11 de las 13 MA con DM < 1 mm, y 9 de las 13 MA fueron menores a dos DE. Conclusiones: La intervención realizada con el Manual de medidas antropométricas aumentó los conocimientos de los especialistas sobre la anatomía, puntos y MA que se pueden utilizar para evaluar la asimetría nasal en pacientes con labio y paladar hendido. La intervención educativa ayuda a aumentar el acuerdo entre los evaluadores para realizar una evaluación confiable de la asimetría nasal en pacientes con estos padecimientos.
Assuntos
Fenda Labial/cirurgia , Fissura Palatina/cirurgia , Pessoal de Saúde/educação , Nariz/anatomia & histologia , Adulto , Idoso , Antropometria , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Reprodutibilidade dos Testes , EspecializaçãoRESUMO
Resumen Introducción: La asimetría nasal es una de las características más frecuentes de los pacientes con labio y paladar hendido; la medición antropométrica (MA) es un método accesible y confiable que puede ser utilizado por los especialistas para evaluarlo. El objetivo de este estudio fue evaluar la efectividad de una intervención educativa aplicada a especialistas que tratan pacientes con labio y paladar hendido para incrementar la precisión en las MA en la evaluación de la asimetría nasal. Métodos: Estudio cuasiexperimental. Resultados: En la primera fase del estudio, 5 de las 13 medidas antropométricas reportaron una diferencia de medias (DM) > 1.5 mm, y 12 de las 13 MA mostraron resultados mayores a dos desviaciones estándar (DE). Los resultados en la segunda fase evidenciaron 11 de las 13 MA con DM < 1 mm, y 9 de las 13 MA fueron menores a dos DE. Conclusiones: La intervención realizada con el Manual de medidas antropométricas aumentó los conocimientos de los especialistas sobre la anatomía, puntos y MA que se pueden utilizar para evaluar la asimetría nasal en pacientes con labio y paladar hendido. La intervención educativa ayuda a aumentar el acuerdo entre los evaluadores para realizar una evaluación confiable de la asimetría nasal en pacientes con estos padecimientos.
Abstract Background: Nasal asymmetry is one of the most frequent characteristics of patients with cleft lip and palate. The anthropometric measurement (AM) is an accessible and reliable method that can be used by specialists to evaluate nasal asymmetry in patients with cleft lip and palate. The aim of this study was to evaluate the effectiveness of an educational intervention applied to cleft lip and palate specialists to increase the accuracy of AM in the evaluation of nasal asymmetry. Methods: Quasi-experimental study. Results: In the first phase of the study, five of the 13 AM reported a mean difference (MD) > 1.5 mm, and 12 of the 13 AM showed results greater than 2 SD (standard deviations). In the second phase, the results showed 11 of the 13 AM with MD < 1 mm, and 9 of the 13 AM were less than 2 SD. Conclusions: The intervention carried out with the manual of AMs increased the knowledge of the specialists on the anatomy points and AM that can be used to evaluate the nasal asymmetry in patients with cleft lip and palate. Educational intervention help to increase the agreement between examiners to perform a reliable evaluation of nasal asymmetry in patients with these conditions.