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1.
Rev. esp. patol. torac ; 31(3): 158-173, oct. 2019. graf, tab
Artigo em Espanhol | IBECS | ID: ibc-187171

RESUMO

Objetivo: investigar la posible degradación de stents metálicos tras co-cultivo con células respiratorias in vitro. Método: durante 21 días se han co-cultivado con la línea CRL-4011 (epitelial) y MRC-5 (fibroblastos) tres tipos de stents: Wallstent(R) (aleación de cobalto-cromo-níquel y molibdeno), Zilver PTX(R) y Zilver Flex(R) (nitinol, aleación de níquel-titanio, con y sin liberación de paclitaxel, respectivamente). Las mismas células sin stent sirvieron como control. Los sobrenadantes de los cultivos se recogieron los días 3, 9, 15 y 21, se alicuotaron y almacenaron a -800 C. Mediante espectrometría de masas (ICP/ MS) se investigaron los niveles de titanio, cromo, níquel, cobalto y molibdeno en los sobrenadantes, y también se han analizado los niveles de esos mismos elementos en el medio de cultivo original (antes de añadirlo a los cultivos celulares). Resultados: en todos los experimentos se encontraron mayores niveles de elementos metálicos en los sobrenadantes recogidos en el tercer día de cultivo, tanto de células epiteliales como de fibroblastos, con diferencias estadísticamente significativas (p<0,002). Los sobrenadantes de los cultivos de células epiteliales con Wallstent mostraron los niveles más altos de níquel y cobalto respecto a los controles (p = 0,001), y los niveles de titanio fueron más altos en los cultivos de Zilver Flex y PTX, constituidos por una aleación de níquel y titanio (p <0,001). Conclusiones: hemos detectado una rápida liberación en el sobrenadante de todos los cultivos de los elementos constitutivos de los tres stents que incluimos en los experimentos, y con niveles muy superiores a los cultivos controles


Objective: To investigate the possible degradation of metal stents after co-culture with respiratory cells in vitro. Methods: Three types of stents were co-cultured with the CRL-4011 line (epithelial) and the MRC-5 line (fibroblasts): Wallstent(R) (cobalt-chromium-nickelmolybdenum alloy), Zilver PTX(R) and Zilver Flex(R) (nitinol, nickel-titanium alloy, with and without paclitaxel release, respectively). The same stentless cells served as the control group. Culture supernatants were collected on days 3, 9, 15 and 21, aliquoted and stored at -80 ºC. The levels of titanium, chromium, nickel, cobalt and molybdenum in the supernatants were studied using inductively coupled plasma mass spectrometry (ICP-MS), and the levels of the same elements were also analyzed in the original culture medium (before adding them to the cell cultures). Results: In all experiments, higher levels of metal elements were found in the supernatants collected on the third day of culture, for both epithelial cells and fibroblasts, with statistically significant differences (p < 0.002). The supernatants of epithelial cell cultures with Wallstent showed the highest levels of nickel and cobalt in comparison to controls (p = 0.001), and titanium levels were higher in Zilver Flex and Zilver PTX cultures, consisting of a nickeltitanium alloy (p < 0.001). Conclusion: We have detected a rapid release in the supernatant of all the cultures of the constituent elements of the three stents that we included in the experiments, and with levels much higher than those of the control cultures


Assuntos
Stents Metálicos Autoexpansíveis , Técnicas In Vitro/métodos , Células Epiteliais/patologia , Fibroblastos/citologia , Meios de Cultura , Stents/classificação , Espectrometria de Massas/métodos , Técnicas de Cultura , Níquel/química , Cobalto/química , Titânio/química
2.
Rev. esp. patol. torac ; 31(3): 188-193, oct. 2019. ilus, graf, tab
Artigo em Espanhol | IBECS | ID: ibc-187174

RESUMO

La fibrosis pulmonar idiopática (FPI) es una enfermedad pulmonar intersticial difusa (EPID) y progresiva. La FPI resulta de la alteración en la reepitelización tras la lesión de las células epiteliales alveolares. Se produce un aumento en la apoptosis epitelial y en la síntesis de mediadores profibróticos, con la consiguiente proliferación de fibroblastos, transformación a miofibrobastos y el depósito incontrolado de matriz extracelular. La aquoporina 1 (AQP1), es una proteína que facilita el movimiento de agua entre el espacio aéreo pulmonar y el parénquima y se ha demostrado que se regula al alza en animales expuestos a hipoxia. La AQP1 se expresa en células endoteliales, pero no en el epitelio alveolar pulmonar. Más recientemente se ha asociado a la AQP1 en los mecanismos implicados en la proliferación celular. Nuestro objetivo principal ha sido evaluar la participación de las Aquoporinas (AQPs) pulmonares en la patogenia de la FPI. Hemos analizado la expresión de AQP1 en biopsias de pacientes diagnosticados con FPI según los criterios de la ATS/ERS/ALAT de 2011 y en otras patologías pulmonares tales como la neumonitis por hipersensibilidad, sarcoidosis y biopsias de controles sanos. Los resultado de la inmunohistoquímica revelaron una intensa expresión de AQP1 en neumocitos tipo II hiperplásicos solo en las muestras obtenidas de pacientes con FPI. Además hay una inducción de la expresión de AQP1 (mRNA y proteína) tras la estimulación con TGF-ß lo que acompaña a los cambios típicos del proceso de transición epitelio mesenquimal. Por lo tanto, la aparición de AQP1 en las células hiperplásicas tipo II y su regulación podrían estar implicadas en la patogénesis de la FPI


Idiopathic pulmonary fibrosis (IPF) is a diffuse interstitial lung disease (ILD) that is progressive. IPF results from altered re-epithelialization after injury to alveolar epithelial cells. There is an increase in epithelial apoptosis and synthesis of pro-fibrotic mediators, with consequent proliferation of fibroblasts, transformation into myofibroblasts and uncontrolled deposition of extracellular matrix. Aquoporin 1 (AQP1) is a protein that facilitates the movement of water between the pulmonary airspace and the parenchyma and has been shown to be upregulated in animals exposed to hypoxia. AQP1 is expressed in endothelial cells, but not in the pulmonary alveolar epithelium. More recently, AQP1 has been associated in the mechanisms involved in cell proliferation. Our primary objective has been to assess the participation of lung aquoporins (AQPs) in the pathogenesis of IPF. We have analyzed the expression of AQP1 in biopsies of patients diagnosed with IPF according to the ATS/ERS/ALAT 2011 criteria and in other lung diseases such as hypersensitivity pneumonitis, sarcoidosis and biopsies of healthy controls. Immunohistochemistry results revealed an intense expression of AQP1 in Type II pneumocyte hyperplasia only in samples obtained from patients with IPF. Additionally, AQP1 (mRNA and protein) expression is induced after stimulation with TGFß, which accompanies typical changes in the mesenchymalepithelial transition process. Therefore, the appearance of AQP1 in Type II cell hyperplasia and its regulation could be involved in the pathogenesis of IPF


Assuntos
Humanos , Fibrose Pulmonar Idiopática/metabolismo , Aquaporina 1/metabolismo , Fibrose Pulmonar Idiopática/diagnóstico , Fator de Crescimento Transformador beta1/administração & dosagem , Fibrose Pulmonar Idiopática/complicações , Fibrose Pulmonar Idiopática/fisiopatologia , Biópsia , Células Epiteliais/metabolismo , Imuno-Histoquímica , Doenças Pulmonares Intersticiais/fisiopatologia
3.
Med. oral patol. oral cir. bucal (Internet) ; 24(4): e433-e437, jul. 2019. ilus, graf
Artigo em Inglês | IBECS | ID: ibc-185655

RESUMO

Background: The aim was to describe the recurrence rates of Oral Squamous Cell Papilloma (OSCP) following surgical treatment with surgical scalpel and two different lasers (CO2 or Er,Cr; YSGG) and to determine the clinical and histopathologic features of these lesions. Material and Methods: A retrospective cohort study covering a period of 12 years (1997-2009) that included patients diagnosed of OSCP treated with surgical excision was performed. Data was processed using SPSS 22.0 (SPPS Inc. Chicago, USA) and a descriptive and bivariate analysis were conducted. Results: A total of 37 histopathologically confirmed OSCP in 36 patients, 19 women (52.7%) and 17 men (47.2%) with an average age of 33.4 years (14-86 years) were included. Twenty-two cases were treated by excision with surgical scalpel excision, 11 with CO2 laser and 3 with Er,Cr: YSGG laser. The mean age was 35.4 years (14-86 years) and the distribution by gender was 19 women (52.7%) and 17 men (47.2%). The most common locations were the palate in 14 cases (37.8%), followed by the tongue in 11 cases (29.7%) and gingiva with 5 cases (13.5%). The average size of the lesions was 4.25 mm in diameter, with a mean evolution time of 5.9 months. The recurrence rate was slightly higher with the CO2 laser (14.3 %) in comparison with the conventional scalpel (10%). No recurrences for Er,Cr: YSGG were found. Conclusions: No differences for recurrence rates for OSCP between groups were found. The recurrence rate is low, happening usually before 15 months of follow-up. OSCPs are lesions usually appearing in patients between 30 and 50 years of both genders and located predominantly on the palate, tongue and gingiva


No disponible


Assuntos
Humanos , Masculino , Feminino , Adulto , Terapia a Laser , Lasers de Estado Sólido , Células Epiteliais , Recidiva Local de Neoplasia , Estudos Retrospectivos
4.
Int. microbiol ; 22(2): 279-287, jun. 2019. graf, tab
Artigo em Inglês | IBECS | ID: ibc-184834

RESUMO

Mustard kimchi consumption reduces cholesterol levels in rats. To identify lactic acid bacteria (LAB) in kimchi which exert this effect, 20 LAB isolates were evaluated for cholesterol reduction in an in vitro screen. The FB111 strain showed the highest cholesterol-lowering activity and was identified as Leuconostoc mesenteroides. This strain was characterized as a potential probiotic through sequential analyses for resistance to gastrointestinal digestion and bile salts, and adhesion to Caco-2 cells. The Caco-2 cells treated with L. mesenteroides FB111 (6-8 log CFU/mL) showed toxicological effect. The reduction of cholesterol uptake in these cells was inhibited by 48.6% compared to the control and significantly higher than that of the Lactobacillus rhamnosus GG (LGG) strain-treated group after 2-h incubation. The levels of NPC1L1, ABCG5, ABCG8, SREBP-1, SREBP-2, and PPARalpha gene expression were determined by reverse transcription-quantitative polymerase chain reaction analysis. The L. mesenteroides FB111 and LGG inhibited the mRNA expression of NPC1L1 (P < 0.05), whereas the expression of PPARalpha was increased. Moreover, the FB111 strain also inhibited the expression of SREBP-2 mRNA. Overall, we found that L. mesenteroides FB111 has efficient cholesterol-lowering effects and might be useful as a probiotic in the food industry


No disponible


Assuntos
Humanos , Colesterol/metabolismo , Células Epiteliais/metabolismo , Leuconostoc mesenteroides/metabolismo , Proteínas de Membrana/metabolismo , PPAR alfa/metabolismo , Probióticos/metabolismo , Proteínas de Ligação a Elemento Regulador de Esterol/metabolismo , Células CACO-2 , Microbiologia de Alimentos , Perfilação da Expressão Gênica , Leuconostoc mesenteroides/classificação , Leuconostoc mesenteroides/isolamento & purificação , Reação em Cadeia da Polimerase em Tempo Real
5.
Nutr. hosp ; 36(2): 309-314, mar.-abr. 2019. tab, graf
Artigo em Espanhol | IBECS | ID: ibc-184323

RESUMO

Introducción: la obesidad es un problema mundial que predispone a otras complicaciones de salud. Se ha demostrado que existe una relación directa entre obesidad y daño genético, lo que se considera en algunos casos como un marcador temprano de cáncer. Objetivo: evaluar el daño genético y los hábitos alimentarios de niños con obesidad y con normopeso. Métodos: estudio transversal realizado en niños en edad escolar. Partiendo de células de la mucosa del epitelio bucal, se evaluó el daño genético a través de la cuantificación de anormalidades nucleares tales como micronúcleos, cariorrexis, cariolisis, picnosis y presencia de dos núcleos. La evaluación nutricional se realizó mediante el análisis de peso, talla y la valoración de su alimentación por medio de historias clínicas nutricionales. Resultados: no se encontraron diferencias significativas en el número de anormalidades nucleares entre los grupos, aunque algunos niños con obesidad mostraron mayor número de anormalidades nucleares en comparación con niños con normopeso. En cuanto a sus hábitos alimentarios, se encontró una correlación positiva entre peso y el consumo de azúcares libres y proteínas en la dieta. Conclusiones: la falta de evidencia que correlacione los micronúcleos con el estado nutricional sugiere que la presencia de estas anormalidades se puede atribuir a factores ambientales o epigenéticos. Especial atención requiere el estudio de dietas similares a las consumidas habitualmente por esta población, con la finalidad de evitar sus potenciales consecuencias. Este estudio representa una contribución importante en la evaluación de los posibles riesgos para la salud asociados con la obesidad infantil


Introduction: obesity is a worldwide problem that predisposes to other health conditions. A direct relationship has been shown between obesity and genetic damage; the late is considered as an early marker of cancer in some cases. Objective: to evaluate the genetic damage and eating habits of children with obesity and normal weight. Methods: cross-sectional study conducted in school-age children. Genetic damage was assessed from buccal epithelial mucosal cells, through the quantification of nuclear abnormalities such as micronuclei, karyorrhexis, caryolysis, pyknosis and the presence of two nuclei. The nutritional evaluation was carried out through the analysis of weight, height and the evaluation of their diet through nutritional clinical records. Results: no significant differences were found in the number of nuclear abnormalities between the groups studied. However, some children with obesity showed higher number of nuclear abnormalities compared with children with normal weight. Regarding their eating habits, a positive correlation was found between weight and the consumption of free sugars and proteins in the diet. Conclusions: the lack of evidence that correlates micronuclei with nutritional status suggests that the presence of these abnormalities can be attributed to environmental or epigenetic factors. Special attention requires the study of diets similar to those habitually consumed by this population, in order to avoid their potential consequences. This study represents an important contribution in the evaluation of the possible health risks associated with childhood obesity


Assuntos
Humanos , Masculino , Feminino , Criança , Peso Corporal , Comportamento Alimentar , Doenças Genéticas Inatas/epidemiologia , Obesidade Pediátrica/epidemiologia , Obesidade Pediátrica/genética , Núcleo Celular/genética , Estudos Transversais , Carboidratos da Dieta , Proteínas na Dieta , Epigênese Genética , Células Epiteliais , Doenças Genéticas Inatas/genética , Testes para Micronúcleos , Estado Nutricional
6.
Rev. esp. patol ; 51(2): 84-96, abr.-jun. 2018. tab
Artigo em Espanhol | IBECS | ID: ibc-171785

RESUMO

Debido a los avances en el conocimiento histológico y molecular del cáncer de ovario, ha sido posible conocer la existencia de 5 subtipos, lo que permite llevar a cabo un enfoque terapéutico más minucioso y un mejor diseño de ensayos clínicos. Cada uno de estos 5subtipos tiene características histológicas específicas y una expresión de biomarcadores propia, así como mutaciones en diferentes genes, algunas de las cuales tienen valor pronóstico y predictivo. CA125 y HE4 son biomarcadores característicos del cáncer de ovario que se utilizan en el diagnóstico y seguimiento de estas enfermedades; sin embargo, en la actualidad, las mutaciones somáticas y germinales en los genes BRCA1 y BRCA2 son los biomarcadores con valor pronóstico y predictivo más importantes en el cáncer de ovario epitelial. En este artículo un grupo de expertos de la Sociedad Española de Oncología Médica y de la Sociedad Española de Anatomía Patológica revisa las características histológicas y moleculares de 5subtipos de cáncer de ovario y describe los biomarcadores y mutaciones más importantes que pueden orientar en el cribado, el diagnóstico y el diseño de estrategias de tratamiento a medida (AU)


Advances in the understanding of the histological and molecular characteristics of ovarian cancer now allow 5subtypes to be identified, leading to a more refined therapeutic approach and improved clinical trials. Each of the subtypes has specific histological features and a particular biomarker expression, as well as mutations in different genes, some of which have prognostic and predictive value. CA125 and HE4 are examples of ovarian cancer biomarkers used in diagnosis and follow-up. Currently, somatic or germinal mutations on BRCA1 and BRCA2 genes are the most important biomarkers in epithelial ovarian cancer, having prognostic and predictive value. In this article, a group of experts from the Spanish Society of Medical Oncology and the Spanish Society of Pathology review the histological and molecular characteristics of the 5subtypes of ovarian cancer and describe the most useful biomarkers and mutations for diagnosis, screening and tailored treatment strategy (AU)


Assuntos
Humanos , Feminino , Neoplasias Ovarianas/patologia , Células Epiteliais/patologia , Biomarcadores Tumorais/análise , Padrões de Prática Médica , Neoplasias Ovarianas/classificação , Programas de Rastreamento/métodos , Detecção Precoce de Câncer/métodos
7.
Rev. esp. med. nucl. imagen mol. (Ed. impr.) ; 37(2): 80-86, mar.-abr. 2018. tab, ilus, graf
Artigo em Espanhol | IBECS | ID: ibc-171451

RESUMO

Objetivo. El Standardized uptake value (SUV) y los parámetros volumétricos volumen metabólico tumoral (MTV) y glicolisis total de la lesión (TLG) de la 18F-FDG PET/TC son útiles para determinar el pronóstico preoperatorio y postratamiento del cáncer epitelial de ovario (CEO). El Ki67 es otro marcador pronóstico en el CEO asociado con la agresividad tumoral. El objetivo fue estudiar la asociación entre los parámetros de la 18F-FDG PET/TC y el Ki67 en el CEO pretratamiento para determinar si la PET/TC puede predecir la agresividad tumoral de forma no invasiva. Material y métodos. Se realizó una PET/TC a 18 pacientes con sospecha o recién diagnóstico de CEO. Se obtuvo el SUV máximo (SUVmax), SUV medio (SUVmean) y el MTV y la TLG corporal (wbMTV y wbTLG, respectivamente), con un dintel del 30%-40% del SUVmax. Se estimó el índice de Ki67 (medio y máximo) en muestras del tejido tumoral, y se correlacionó con los parámetros de la PET. Resultados. La edad media fue 57,0 años (desviación estándar 13,6 años). Se observó una moderada correlación entre el Ki67 medio y el SUVmax (r=0.392), SUVmean 30% (r=0.437) y SUVmean 40% (r=0.443), así como entre el Ki67 máximo y el SUVmax (r=0.360), SUVmean 30% (r=0.362) y SUVmean 40% (r=0.319). La correlación fue más débil, e inversamente negativa, entre el Ki67 medio y máximo y los parámetros volumétricos de la PET. No hubo diferencias estadísticamente significativas entre las correlaciones. Conclusiones. SUVmax y SUVmean se correlacionaron moderadamente con el Ki67 mientras que los parámetros volumétricos mostraron una correlación débil. SUVmax y SUVmean podrían utilizarse para predecir la agresividad tumoral en el CEO pretratamiento (AU)


Objective. Standardised uptake value (SUV) and volumetric parameters such as metabolic tumour volume (MTV) and total lesion glycolysis (TLG) from 18F-FDG PET/CT are useful criteria for disease prognosis in pre-operative and post-treatment epithelial ovarian cancer (EOC). Ki67 is another prognostic biomarker in EOC, associated with tumour aggressiveness. The aim of this study is to evaluate the association between 18F-FDG PET/CT measurements and Ki67 in pre-treatment EOC to determine if PET/CT parameters could non-invasively predict tumour aggressiveness. Material and methods. A pre-treatment PET/CT was performed on 18 patients with suspected or newly diagnosed EOC. Maximum SUV (SUVmax), mean SUV (SUVmean), whole-body MTV (wbMTV), and whole-body TLG (wbTLG) with a threshold of 30% and 40% of the SUVmax were obtained. Furthermore, Ki67 index (mean and hotspot) was estimated in tumour tissue specimens. Immunohistochemical findings were correlated with PET parameters. Results. The mean age was 57.0 years old (standard deviation 13.6 years). A moderate correlation was observed between mean Ki67 index and SUVmax (r=0.392), SUVmean 30% (r=0.437), and SUVmean 40% (r=0.443), and also between hotspot Ki67 index and SUVmax (r=0.360), SUVmean 30% (r=0.362) and SUVmean 40% (r=0.319). There was a weaker correlation, which was inversely negative, between mean and hotspot Ki67 and volumetric PET parameters. However, no statistical significant differences were found for any correlations. Conclusions. SUVmax and SUVmean were moderately correlated with Ki67 index, whereas volumetric PET parameters overall, showed a weaker correlation. Thus, SUVmax and SUVmean could be used to assess tumour aggressiveness in pre-treatment EOC (AU)


Assuntos
Humanos , Tomografia Computadorizada com Tomografia por Emissão de Pósitrons/métodos , Fluordesoxiglucose F18/farmacocinética , Antígeno Ki-67/análise , Neoplasias Ovarianas/diagnóstico por imagem , Células Epiteliais/patologia , Sensibilidade e Especificidade , Titulometria/métodos , Neoplasias Ovarianas/metabolismo , Glicólise/efeitos da radiação , Imuno-Histoquímica/métodos
8.
Rev. iberoam. micol ; 35(1): 32-38, ene.-mar. 2018. tab, graf, ilus
Artigo em Inglês | IBECS | ID: ibc-170920

RESUMO

Background. Sporotrichosis is a fungal infection caused by the Sporothrix schenckii complex. The adhesion of the fungus to the host tissue has been considered the key step in the colonization and invasion, but little is known about the early events in the host-parasite interaction. Aims. To evaluate the proteolytic activity of S. schenckii on epithelial cells. Methods. The proteolytic system (at pH 5 and 7) was evaluated using azocoll and zymograms. The host-parasite interaction and epithelial cell response were also analyzed by examining the microfilament cytoskeleton using phalloidin-FITC and transmission electron microscopy. Finally, the metabolic activity was determined using an XTT assay. Results. The zymograms showed that S. schenckii yeast cells possess high intracellular and extracellular proteolytic activities (Mr≥200, 116, 97, and 70kDa) that are pH dependent and are inhibited by PMSF and E64, which act on serine and cysteine-type proteases. During the epithelial cell-protease interaction, the cells showed alterations in the microfilament distribution, as well as in the plasma membrane structure. Moreover, the metabolic activity of the epithelial cells decreased 60% without a protease inhibitor. Conclusions. Our data demonstrate the complexity of the cellular responses during the infection process. This process is somehow counteracted by the action of proteases inhibitors. Furthermore, the results provide critical information for understanding the nature of host-fungus interactions and for searching a new effective antifungal therapy, which includes protease inhibitors (AU)


Antecedentes. La esporotricosis es una infección fúngica causada por el complejo Sporothrix schenckii. La adhesión del hongo al tejido hospedero se ha considerado un paso clave en la colonización e invasión, sin embargo poco se conoce de los eventos tempranos en la interacción hospedero-parasito. Objetivos. Evaluar la actividad proteolítica de S. schenckii en células epiteliales. Métodos. El sistema proteolítico (bajo los valores pH 5 y 7) fue evaluado mediante azocoll y zimogramas. Además, la interacción hospedero-parasito y la respuesta celular fueron analizadas con el examen de los microfilamentos del citoesqueleto mediante faloidina-FITC y microscopia electrónica de transmisión. Finalmente, la actividad metabólica (viabilidad celular) fue determinada por un ensayo de XTT. Resultados. Los zimogramas de S. schenckii muestran que posee una alta actividad proteolítica intracelular y extracelular (Mr≥200, 116, 97 y 70kD) dependientes de pH e inhibidas por PMSF y E64, que actúan sobre serin- y cistein proteasas. Durante la interacción de las células epiteliales-proteasas, las células mostraron alteraciones en la distribución de los microfilamentos y la estructura de la membrana plasmática. Además, la actividad metabólica (viabilidad celular) de las células epiteliales disminuyó un 60% sin inhibidores de proteasas. Conclusiones. Nuestros datos demuestran la complejidad de la respuesta celular durante el proceso de infección, proceso que puede ser en parte contrarrestado por la acción de los inhibidores de proteasas. Además, los resultados proporcionan información crítica para el entendimiento de la naturaleza en la interacción hospedero-hongo y para una nueva terapia antifúngica eficaz que incluya inhibidores de proteasas (AU)


Assuntos
Humanos , Esporotricose/microbiologia , Peptídeo Hidrolases/isolamento & purificação , Sporothrix/isolamento & purificação , Citoesqueleto/microbiologia , Células Epiteliais/microbiologia , Dermatomicoses/microbiologia
9.
Rev. esp. patol. torac ; 29(4): 216-225, dic. 2017. graf, ilus
Artigo em Espanhol | IBECS | ID: ibc-170398

RESUMO

En este trabajo usamos dióxido de titanio (TiO2), fabricado mediante nanotecnología. Para demostrar su superioridad respecto al talco, realizamos un estudio in vitro comparando la respuesta pro-inflamatoria de ambos agentes sobre células malignas y mesoteliales benignas; investigando la posible inducción de apoptosis y la posible inhibición de angiogénesis también por ambos agentes. Realizamos cultivo de líneas celulares derivadas de mesotelio humano, procedente de mesotelioma bifásico humano y adenocarcinoma bronquial humano. Las células se co-cultivaron con diferentes dosis de talco y de nanopartículas de TiO2. En todas las muestras de sobrenadantes de los cultivos se analizaron los niveles de diferentes mediadores inflamatorios. La tasa de apoptosis se analizó por la expresión de Caspasa-3. Para el estudio de angiostasis se determinaron los niveles de endostatina mediante técnica ELISA. Observamos que la viabilidad de las células mesoteliales benignas es mucho menor al emplear TiO2. En el caso de las células mesoteliales malignas, se observó el mismo efecto con dosis alta de TiO2. En el adenocarcinoma de pulmón, la viabilidad de estas células expuestas al talco fue netamente inferior a la que se observó en la línea celular benigna. La producción de IL-8 fue mucho mayor por parte de las células mesoteliales neoplásicas que por las benignas y aumentó siguiendo un patrón dosis dependiente frente al talco, mientras que cayó con el TiO2. Según estos resultados, se demuestra que el talco es superior al TiO2 en su capacidad de producir mediadores que favorecerían la pleurodesis para el control del derrame pleural maligno


For this study, we used titanium dioxide (TiO2), produced using nanotechnology. To show its superiority with respect to talc, we completed an in vitro study comparing the pro-inflammatory response of both agents towards malignant and benign mesothelial cells; researching the possible apoptosis induction and possible inhibition of angiogenesis for both agents. We took a culture of cell lines derived from human mesothelioma, originating from human biphasic mesothelioma and human bronchial adenocarcinoma. The cells were cocultured with different doses of talc and TiO2 nanoparticles. The levels of different inflammatory mediators were analyzed for each culture supernatant sample. The apoptosis rate was analyzed using caspase-3 expression. The endostatin levels were determined for the angiostasis study using the ELISA technique. We observed that the viability of the benign mesothelial cells is much lower after using TiO2. In the case of malignant mesothelial cells, the same effect was observed with a high dose of TiO2. In adenocarcinoma of the lung, the viability of these cells exposed to talc was distinctly lower than that which was observed in the benign cell line. IL-8 production was much higher in neoplastic mesothelial cells than in benign cells and increased following a dose-dependent pattern with talc, while it decreased with TiO2. According to these results, we can see that talc is superior to TiO2 in its ability to produce mediators which favor pleurodesis for the control of malignant pleural effusions


Assuntos
Humanos , Titânio/uso terapêutico , Nanotecnologia/métodos , Talco/uso terapêutico , Derrame Pleural/prevenção & controle , Indutores da Angiogênese/uso terapêutico , Nanopartículas/análise , Células Epiteliais , Técnicas In Vitro/métodos , Apoptose , Endostatinas/análise , Derrame Pleural/terapia , Ensaio de Imunoadsorção Enzimática/métodos , Pleurodese/métodos , Sobrevivência Celular , Epitélio
10.
Allergol. immunopatol ; 45(5): 473-481, sept.-oct. 2017. tab, graf
Artigo em Inglês | IBECS | ID: ibc-167002

RESUMO

Background. Although studies have reported an association between air pollutants and increased allergic airway diseases, such as allergic rhinitis and nasal polyposis, the underlying mechanisms are not fully understood. A limited number of studies have suggested that diesel exhaust particles (DEP) play a role in atopy and the pathogenesis of allergic upper airway diseases. The aim of this study was to investigate the effect of DEP on inflammatory cytokine release, and mRNA expression of transcription factors such as JNK and NF-Beta in primary nasal epithelial cells (NECs), in vitro. Methods: NECs from non-atopic, non-rhinitic subjects (controls) and patients with allergic rhinitis and nasal polyps were cultured and incubated with 0-100 μg/ml DEP for 24 h. ELISA and RT-PCR were used to assess the release of IL-8, GM-CSF, and RANTES, and mRNA expression for JNK and NF-κB, respectively. Results: Compared to control cells, NECs from subjects with atopic polyps released significantly greater amounts of IL-8 (median = 887 vs. 176.6 pg/μg cellular protein; p < 0.0001) and RANTES (median = 0.191 vs. 0.02 pg/μg cellular protein; p < 0.001). While 50 μg/ml DEP induced release of RANTES in NECs from patients with allergic rhinitis, 100 μg/ml DEP decreased IL-8 levels in NECs from both control and allergic rhinitic subjects. DEP did not affect mRNA expression for JNK and NF-κB from NECs of subjects with polyps. Conclusions: NECs from subjects with various pathologies may respond differently to DEP (AU)


No disponible


Assuntos
Humanos , Masculino , Feminino , Adulto , Citocinas/análise , Inflamação/fisiopatologia , Hipersensibilidade Respiratória/fisiopatologia , Pólipos Nasais/fisiopatologia , Mediadores da Inflamação/análise , Emissões de Veículos/análise , Poluentes Atmosféricos/análise , Rinite Alérgica/fisiopatologia , Células Epiteliais , Estudos de Casos e Controles
11.
Arch. esp. urol. (Ed. impr.) ; 70(3): 361-366, abr. 2017. ilus
Artigo em Espanhol | IBECS | ID: ibc-161970

RESUMO

OBJETIVO: Presentar dos casos de pacientes diagnosticados de carcinomas linfoepiteliales del tracto urinario. Realizamos una revisión de la literatura de esta infrecuente entidad, con el fin de aclarar las características clínicas y terapéuticas. MÉTODOS: Revisión retrospectiva de la historia clínica de dos pacientes diagnosticados de carcinomas linfoepiteliales, uno en pelvis renal y el otro en vejiga. RESULTADOS: Caso 1: Mujer de 74 años. Se le realiza una nefrectomía radical izquierda y linfadenectomía retroperitoneal por carcinoma de pelvis renal tipo linfoepitelioma like puro, estadio pT4R0pN1cM0. Recibe quimioterapia adyuvante. A los cinco años presenta recidiva tumoral en el meato ureteral izquierdo que se reseca; es informado como carcinoma uroterial de alto grado, con marcado componente linfoide, estadio pT1. Al año de seguimiento de la recidiva la paciente se encuentra asintomática y sin recaída local ni a distancia. Caso 2: Varón de 82 años diagnosticado de carcinoma vesical infiltrante. Se le realiza una cistoprostatectomía radical con linfadenectomía pélvica y derivación urinaria. El resultado es un carcinoma urotelial de vejiga tipo linfoepitelioma- like puro, estadio pT4aR1pN2cM0. A los seis meses se objetiva la aparición de metástasis de órganos sólidos y ganglionares. Actualmente se encuentra con tratamiento sintomático de su enfermedad. CONCLUSIONES: Destacar la importancia clínica que implica el diagnóstico de esta entidad, ya que puede influir en el tratamiento y la supervivencia específica de la enfermedad, siendo el carcinoma uroterial concomitante el que marque el pronóstico. El papel que desempeñan las tinciones inmunohistoquímicas es fundamental, ya que nos permiten confirmar la presencia del componente epitelial (AU)


OBJECTIVE: We report two cases of patients diagnosed with lymphoepithelioma-like carcinomas of the urinary tract. We review the literature of this rare entity. The objective is to clarify the clinical and therapeutic characteristics. METHODS: We present a retrospective review of medical records of two patients diagnosed with lymphoepitheliomalike carcinomas, one in the renal pelvis and the other in the bladder. We review the epidemiology, diagnosis and therapeutic alternatives. RESULTS: Case 1: A 74-year-old women with past medical history of left radical nephrectomy and retroperitoneal lymphadenectomy six years before for renal pelvis carcinoma type pure lymphoepithelioma-like, stage pT4R0pN1cM0. She received adjuvant chemotherapy with Cisplatin and Gemcitabine. Five years later, she presented tumor recurrence in the left ureteral meatus, this lesion was resected. The pathology reported a high-grade urothelial carcinoma with marked lymphoid component, stage pT1. At follow-up, one year after the last recurrence, the patient was asymptomatic. In tomography control, no local or distant recurrences were objectified Case 2: A 82-year-old men with diagnosis of muscleinvasive bladder cancer. The tumor caused right obstructive uropathy without extracapsular, regional or remote extension. We performed a radical cystoprostatectomy with bilateral pelvic lymphadenectomy and urinary diversión type cutaneous transureterostomy. The pathology reported a urothelial bladder carcinoma type mixed lymphoepithelioma-like, stage pT4aR1pN2cM0. At six months follow-up, the patient had liver and spleen lesions and retroperitoneal adenopathic nodes, all suggestive of metastases. He is currently receiving symptomatic treatment of their disease. CONCLUSIONS: We emphasize the clinical importance involved in the diagnosis of this entity. The diagnosis influence the aggressiveness of treatment and disease-specific survival. Therefore, concomitant transitional cell carcinoma defines the prognosis. The role of immunohistochemical staining is fundamental, allowing us to confirm the presence of the epithelial component (AU)


Assuntos
Humanos , Masculino , Feminino , Idoso , Idoso de 80 Anos ou mais , Neoplasias Urológicas/patologia , Células Epiteliais/patologia , Carcinoma/patologia , Imuno-Histoquímica , Neoplasias Pélvicas/patologia , Pelve Renal/patologia , Neoplasias da Bexiga Urinária/patologia , Excisão de Linfonodo , Nefrectomia , Hematúria/etiologia
15.
Med. oral patol. oral cir. bucal (Internet) ; 22(1): e58-e63, ene. 2017. ilus, tab
Artigo em Inglês | IBECS | ID: ibc-159767

RESUMO

Background: Due to increased formaldehyde exposure, carcinogenic to humans, several researches have been studying the potential toxicity and the safe levels for human beings. The aim of this study was to investigate mutagenicity and cytotoxicity in buccal epithelial exfoliated cells (BEC) of students subjected to formaldehyde (FA) during anatomy classes. Material and Methods: BEC were collected periodically from 17 volunteers of undergraduate programs, who had participated in practical anatomy classes, before and after FA exposure. Cells were stained according to Feulgen method and then micronucleus test was applied. A total of 1,500 cells were assessed per individual in this study for the micronucleus frequency and other parameters of cytotoxicity. Results: There was statistically significant increase in number of micronucleated BEC after FA exposure (after 1 month p=.034 and after 3.5 months p=.017). However, FA exposure caused no significant increase in other nuclear alterations closely related to cytotoxicity (p≥.05). Conclusions: FA induced mutagenicity during anatomy classes. Cell death increased, but it was not statistically significant. Efforts have to be made to improve air quality and reduce exposures during anatomy classes (AU)


No disponible


Assuntos
Humanos , Formaldeído/farmacocinética , Citotoxicidade Imunológica , Células Epiteliais , Testes de Mutagenicidade/métodos , Anatomia/educação , Carcinógenos/farmacocinética , Testes para Micronúcleos/métodos
16.
J. physiol. biochem ; 72(4): 721-732, dic. 2016. graf, ilus
Artigo em Inglês | IBECS | ID: ibc-168379

RESUMO

MicroRNAs (miRNAs) are endogenous, non-coding, small RNAs, which play a critical role in regulating varieties of the biological and pathologic processes. miR-181a has been reported to participate in tumorigenic progression. However, the roles of miR-181a in cervical cancer (CC) are still unknown. The aim of this research was to explore the effects and molecular mechanism of miR-181a in CC cells. In this paper, the levels of miR-181a in CC cell lines were determined by real-time PCR. We found that the levels of miR-181a were evidently enhanced in CC cell lines compared with normal cervical epithelium cells. Then, the miR-181a inhibitor was transiently transfected into HeLa and CaSKi cells using Lipofectamine 2000 reagent. Subsequently, the Cell Counting Kit-8 (CCK-8) and BrdU-ELISA results showed that down-regulation of miR-181a inhibited the cell viability and proliferation. Our data also demonstrated that miR-181a inhibitor arrested cell cycle progression of HeLa and CaSKi cells by up-regulation of p21 and p27 expressions. In addition, inhibition of miR-181a promoted apoptosis of HeLa and CaSKi cells due to increasing Bax expression and decreasing Bcl-2 expression. Ultimately, the effect of miR-181a inhibitor on the PTEN/Akt/FOXO1 signaling pathway was investigated by Western blot. From our results, down-regulation of miR-181a increased the expression of PTEN and decreased phosphorylation of Akt and FOXO1. Altogether, miR-181a might be an oncogene in CC cells. The potential mechanism was that inhibition of miR-181a might suppress proliferation and invasion and promote apoptosis of HeLa and CaSKi cells by modulating the PTEN/Akt/FOXO1 signaling pathway (AU)


No disponible


Assuntos
Humanos , Feminino , Colo do Útero/metabolismo , MicroRNAs/genética , Proteína Forkhead Box O1/genética , Regulação Neoplásica da Expressão Gênica , PTEN Fosfo-Hidrolase/genética , Proteínas Proto-Oncogênicas c-akt/genética , Fenômenos Fisiológicos Celulares , Linhagem Celular Tumoral , Células Epiteliais , Oligorribonucleotídeos , Transdução de Sinais , Inibidor de Quinase Dependente de Ciclina p21 , Proteína X Associada a bcl-2
17.
Rev. esp. geriatr. gerontol. (Ed. impr.) ; 51(6): 329-334, nov.-dic. 2016. graf
Artigo em Espanhol | IBECS | ID: ibc-157820

RESUMO

Antecedentes. El ácido zoledrónico se utiliza en el tratamiento de diversas enfermedades, tumorales o no, aunque su uso se asocia con necrosis avascular ósea. Objetivo. Determinar un posible efecto protector de diferentes sustancias antioxidantes frente a la inhibición del crecimiento de células epiteliales de próstata humana (PNT2) y en células tumorales de adenocarcinoma transgénico de próstata murina (TRAMP-C1), en tratamientos combinados de ácido zoledrónico junto con radiación ionizante (IR). Material y métodos. Mediante un ensayo de viabilidad celular (MTT) se estudia la supervivencia celular de 2 líneas celulares en tratamientos aislados y combinados con ácido zoledrónico y con IR, así como, el efecto de la adición de diferentes sustancias antioxidantes. Resultados. El ácido zoledrónico muestra un efecto citotóxico significativo sobre las células PNT2 y TRAMP-C1 (p<0,001). La administración de diferentes sustancias antioxidantes en el tratamiento con ácido zoledrónico presenta un efecto protector sobre las células PNT2 (p<0,001), pero no sobre las células tumorales. Sin embargo, la administración de ácido rosmarínico y apigenina en el tratamiento combinado con ácido zoledrónico junto con IR presenta un efecto protector no solo sobre las células PNT2 (p<0,001), sino también sobre las células TRAMP-C1 (p<0,001). Conclusión. El uso de sustancias antioxidantes produce una disminución del efecto citotóxico del ácido zoledrónico sobre las células no tumorales, por lo que podrían ser utilizadas en enfermedades benignas no tumorales. Sin embargo, en un tratamiento combinado con IR, también pueden proporcionar protección a las células tumorales, y reducir de este modo el efecto terapéutico deseado (AU)


Background. Zoledronic acid is used in the treatment of cancer-related diseases, although its use has been associated with avascular osteonecrosis. Aims. To determine the possible protective effect of a range of antioxidant substances against the inhibition of human prostate epithelial cell growth (PNT2) and transgenic adenocarcinoma mouse prostate tumour cells (TRAMP-C1), in treatments combining zoledronic acid and ionising radiation (IR). Material and method. Cell survival is studied via cell viability assays (MTT) for 2 cell lines in isolated and combined treatments with zoledronic acid and/or IR, as well as the effect of adding 3 antioxidant substances. Results. Zoledronic acid displays a significant cytotoxic effect over PNT2 and TRAMP-C1 cells (P<.001). The administration of antioxidants together with the zoledronic acid shows a protective effect for normal prostate cells, yet not so for prostate tumour cells. However, the administration of rosmarinic acid and apigenin in treatments combined with zoledronic acid provides a protective effect from the harmful effects of applying ionizing radiation, not only for normal PNT2 cells, but also for tumour cells. Conclusion. The use of antioxidant substances decreases the cytotoxic effect of zoledronic acid over non-tumour cells, and as such could be used in benign diseases. Furthermore, in the combined treatment using ionising radiation, these antioxidants also produced a protective effect in tumour cells, thus reducing the therapeutic effect sought by combining the treatment with radiation (AU)


Assuntos
Humanos , Masculino , Feminino , Toxicidade/métodos , Antioxidantes/uso terapêutico , Osteonecrose/tratamento farmacológico , Difosfonatos/uso terapêutico , Células Epiteliais , Radiação Ionizante , Adenocarcinoma/tratamento farmacológico , Análise de Variância , Análise Estatística , Neoplasias Ósseas/tratamento farmacológico
18.
J. physiol. biochem ; 71(4): 823-838, dic. 2015.
Artigo em Inglês | IBECS | ID: ibc-145733

RESUMO

Transdifferentiation of alveolar epithelial type II cells (AECIIs) to type I cells (AECIs) is critical for reestablishment and maintenance of an intact alveolar epithelium. However, this process is frequently destroyed by hyperoxia treatment, which is commonly used in respiratory distress syndrome therapy in preterm infants. Wnt5a is considered to participate in this physiopathologic process, but the clear mechanisms still need to be further investigated. In this study, preterm rats and primary rat AECIIs were exposed to hyperoxia. Hematoxylin and eosin staining was used to examine the histological changes of the lungs. Real-time PCR and western blotting were used to examine Wnt5a expression and biomarkers of AECII and AECI expression. Immunohistochemistry and immunofluorescence were also used to determine the expression and location of selected biomarkers. Furthermore, AECIIs transfected with Wnt5a gene and exogenous Wnt5a were used to examine whether Wnt5a contributes to the transdifferentiation of AECIIs to AECIs. Results showed that hyperoxia inhibited the transdifferentiation of AECIIs to AECIs in vitro, which is represented by biomarkers of two types of cell that remained unchanged. In addition, Wnt5a protein expression was found to be decreased after hyperoxia exposure in vitro and in vivo. Furthermore, both the overexpression of Wnt5a and exogenous Wnt5a addition blocked the inhibitory effect of hyperoxia in vitro. In conclusion, our results suggest that the transdifferentiation of AECIIs to AECIs is impaired by hyperoxia, and this process may be associated with Wnt5a downregulation. Targeting Wnt5a may have the potential for the therapy of lung injury in preterm infants induced by hiperoxia (AU)


No disponible


Assuntos
Animais , Ratos , Proteínas Wnt/fisiologia , Hiperóxia/fisiopatologia , Células Epiteliais/fisiologia , Epitélio/fisiologia , Biomarcadores/análise , Recém-Nascido Prematuro/fisiologia
19.
Allergol. immunopatol ; 43(6): 584-592, nov.-dic. 2015. tab, ilus
Artigo em Inglês | IBECS | ID: ibc-147076

RESUMO

Background: Asthma is a chronic inflammatory airway disease, the incidence of which has increased recently. In order to identify the potential biomarkers for allergic asthma therapy, microarray data were analysed to find meaningful information. Methods: Microarray data GSE18965 were downloaded from Gene Expression Ominibus (GEO), including seven asthmatic epithelium samples from children with allergic asthma and nine healthy controls. Limma package was used to detect differentially expressed genes (DEGs) and the criteria were (log fold change) > 0.5 and p value < 0.05. We used Database for Annotation, Visualization and Integrated Discovery (DAVID) tool to perform GO function and KEGG pathway analysis. STRING database was used to construct protein - protein interaction (PPI) network. MicroRNA (miRNA) regulation network was constructed according to miRecords database. Results: We identified 274 DEGs in asthma epithelium samples comparing with healthy controls. There were 123 up-regulated DEGs and 151 down-regulated DEGs. PPI network analysis showed that TSPO, G6PD and TXN had higher degree. miRNA regulation network demonstrated that miR-16 and miR-15a had higher degree. The target genes of miRNAs were significantly enriched in the apoptosis function. Conclusions: TSPO, G6PD and TXN, miR-16, miR-15a and apoptosis may be used as the targets for children’s allergic asthma therapy (AU)


No disponible


Assuntos
Humanos , Masculino , Feminino , Criança , Animais , MicroRNAs/genética , Células Epiteliais/fisiologia , Glucosefosfato Desidrogenase/metabolismo , Receptores de GABA/metabolismo , Mapas de Interação de Proteínas , Análise em Microsséries , Regulação da Expressão Gênica , Células Cultivadas , Biomarcadores/metabolismo , Apoptose/genética
20.
Av. odontoestomatol ; 31(6): 366-370, nov.-dic. 2015. ilus, graf
Artigo em Espanhol | IBECS | ID: ibc-145593

RESUMO

El presente estudio tuvo como propósito determinar los cambios tisulares y celulares que ocasiona el tabaquismo en la mucosa bucal de aspecto normal. Metodología: Se estudiaron 30 pacientes con edades comprendidas entre los 19 y los 29 años de edad, divididos en 3 grupos de acuerdo a su estatus tabáquico. De cada individuo se tomó una muestra de mucosa bucal aparentemente sana ubicada distal a la zona donde se realizó la incisión para la exodoncia de un tercer molar, la cual fue procesada y teñida con H&E. Las mucosas fueron evaluadas bajo microscopio de luz y los datos analizados estadísticamente. Resultados: El grupo de los individuos no fumadores presentó en un 100% epitelio paraqueratinizado a diferencia del grupo de individuos con tabaquismo que mostró en un 90% ortoqueratinización (p= 0,0001). El estrato basal se presentó intacto en el 100% del grupo de individuos no fumadores mientras que en el 60% de los fumadores se observó duplicado (p= 0,003). El infiltrado inflamatorio fue mayor en los fumadores pero no estadísticamente significativo, a diferencia de la vascularización que se observó estadísticamente disminuida en este grupo. Conclusión: La mucosa bucal en fumadores muestra numerosos cambios tisulares y celulares que pueden conllevar al desarrollo de lesiones malignas. La ausencia de cambios clínicos no implica que no exista el riesgo de transformación carcinogénica (AU)


The constant contact of cigarette smoke and its components with the oral mucosa leads to a series of microscopic architectural changes of the mucosa. The aim of the study was to determine tissue and cellular changes caused by smoking in the oral mucosa of normal appearance. Methods: 30 patients aged between 19 and 29 years of age were included in the study. Patients were divided into 3 groups according to their smoking status. A sample of oral mucosa was taken during extraction of third molar, and then processed and stained for H&E. Biopsies were evaluated under light microscope and the data analyzed statistically. Results: 100% of non-smokers showed parakeratinized epithelia and orthokeratin was observed in 90% of smoker cases (p= 0.0001). Basal layer was preserved in all healthy individuals, contrary to 60% of smokers showed basal hyperplasia (p= 0.003). Inflammatory infiltrated was observed augmented in smokers but difference was not statically significant. However, in this group number of blood vessels was statistically decreased. Conclusions: Oral mucosa of tobacco users shows tissue and cellular changes which may lead to malignant development. Carcinogenic risk may be present although absence of clinical changes (AU)


Assuntos
Humanos , Tabagismo/epidemiologia , Mucosa Bucal , Imunidade nas Mucosas , Células Epiteliais , Fatores de Risco , Fumar/efeitos adversos
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