Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 12 de 12
Filtrar
1.
Biol. Res ; 53: 41, 2020. graf
Artículo en Inglés | LILACS | ID: biblio-1131885

RESUMEN

BACKGROUND: Tumor angiogenesis is an essential event for tumor growth and metastasis. It has been showed that REC8, a component of the meiotic cohesion complex, played a vital role in Epithelial-Mesenchymal Transition (EMT) in gastric cancer. However, the role of REC8 in gastric cancer angiogenesis remains to be identified. RESULTS: Inhibition of REC8 expression in gastric cancer cells contributed to tumor angiogenesis in the gastric cancer microenvironment. The clinical analysis demonstrated that the loss of REC8 in gastric cancer with enrichment of MVD. Depletion of REC8 expression in gastric cancer cells significantly increased tube formation of human umbilical vein endothelial cells (HUVECs), which is attributed to enhancement of vascular endothelial growth factor (VEGF) secretion caused by REC8 slicing. While addition of neutralizing antibody targeted VEGF into supernatant drastically reversed the effect of REC8 loss in gastric cancer cells on tube formation. Mechanistic analyses indicated that ablation of REC8 promotes nuclear factor-κB (NF-κB) p65 activity and its downstream gene VEGF expression, leading to tube formation. CONCLUSIONS: These results demonstrated a novel REC8 function that suppressed tumor angiogenesis and progression by attenuation of VEGF in gastric cancer microenvironment.


Asunto(s)
Humanos , Neoplasias Gástricas/patología , FN-kappa B/genética , Proteínas de Ciclo Celular/genética , Factor A de Crecimiento Endotelial Vascular/genética , Neovascularización Patológica/genética , Neoplasias Gástricas/irrigación sanguínea , Línea Celular Tumoral , Microambiente Tumoral , Células Endoteliales de la Vena Umbilical Humana
2.
Rev. Esc. Enferm. USP ; 48(spe): 129-136, 08/2014. tab
Artículo en Inglés | LILACS, BDENF | ID: lil-731288

RESUMEN

The study goals present an overview of Hospitalizations for Ambulatory Care Sensitive Conditions (ACSC) in Guarulhos, SP, from 2008 to 2012. This is an ecological study based on secondary data obtained from the Brazilian Hospital Information System, and supported by the Praxical Theory of Intervention of Collective Health Nursing. Applied descriptive statistics for analysis. It was observed that Guarulhos shows an upward trend in hospitalizations by ACSC (20% increase), the most frequent causes of heart failure (11.8%), cerebrovascular disease (10.6%) and angina (9.7%), most frequently in the age group ≥ 65years old, for both sexes. The results are similar to other Brazilian studies, but their analysis should extrapolate the biological limits and the supply of healthcare resources, focusing on the social determinants of the health-disease process.


.


El estudio tuvo como objetivo proporcionar una visión general de las Hospitalizaciones por Condiciones Sensibles a la Atención Primaria (ICSAP) en Guarulhos, SP, en el período 2008-2012. Se trata de un estudio ecológico a partir de datos secundarios obtenidos a través del Sistema de Información Hospitalaria, y apoyado por la Teoría de Intervención Práxica de la Enfermería en Salud Colectiva. Se aplicó la estadística descriptiva para el análisis. Se observó que Guarulhos muestra una tendencia al alza en las hospitalizaciones por ICSAP (aumento del 20%), las causas más frecuentes de insuficiencia cardiaca (11,8%), enfermedad cerebrovascular (10,6%) y la angina (9,7% ), con mayor frecuencia en el grupo de edad ≥ 65 años para ambos sexos. Los resultados son similares a otros estudios brasileños, pero su análisis debe extrapolar los límites biológicos y el suministro de los recursos sanitarios, centrándose en los determinantes sociales del proceso salud-enfermedad.
.


Objetivo Apresentar o panorama das Internações por Condições Sensíveis à Atenção Primária (ICSAP) no município de Guarulhos, SP, no período de 2008 a 2012. Método Estudo ecológico, com dados secundários obtidos via Sistema de Informações Hospitalares, sustentado pela Teoria de Intervenção Práxica da Enfermagem em Saúde Coletiva. Empregou-se estatística descritiva para análise. Resultados Observou-se que Guarulhos apresenta trajetória crescente nas internações por ICSAP (aumento de 20%), sendo as causas mais frequentes a insuficiência cardíaca (11,8%), as doenças cerebrovasculares (10,6%) e a angina (9,7%), com maior frequência na faixa etária ≥ 65 anos, para ambos os sexos. Conclusão Os resultados encontrados assemelham-se a outros estudos brasileiros, porém sua análise deve extrapolar os limites biológicos e a oferta de recursos assistenciais, atentando para as determinações sociais do processo saúde-doença. .


Asunto(s)
Animales , Masculino , Ratas , Medicamentos Herbarios Chinos/uso terapéutico , Fitoterapia , Lesiones Precancerosas/tratamiento farmacológico , Neoplasias Gástricas/tratamiento farmacológico , Mucosa Gástrica/irrigación sanguínea , Mucosa Gástrica/efectos de los fármacos , Mucosa Gástrica/patología , Hexosaminas/metabolismo , Malondialdehído/metabolismo , Lesiones Precancerosas/irrigación sanguínea , Lesiones Precancerosas/patología , Ratas Wistar , Neoplasias Gástricas/irrigación sanguínea , Neoplasias Gástricas/patología
3.
Rev. Esc. Enferm. USP ; 48(spe): 109-115, 08/2014.
Artículo en Inglés | LILACS, BDENF | ID: lil-731297

RESUMEN

Objective To analyze the practices of primary care focused on the harmful consumption of drugs. Method This is a qualitative study, developed with a dialectical-critical approach. Data collection was carried out through semi-structured interviews with 10 employees of a basic health unit (UBS). Results The demands are not accepted, and if they go beyond the barriers shaped by the historical absence of health care practices for drug users and moralistic and preconceived ideologies, they are not reinterpreted as health needs; practices that meet these demands and go beyond the barriers are poor; the functionalist approach, which explains drug use as a disease and considers drug users as deviants, supports the few existing practices. Conclusion primary health care is mistakenly focused on addiction; it lacks structural elements of the production process in health and internal dynamics of the working processes that would foster the development of collective practices. .


Objetivo El estudio tiene como objetivo analizar las prácticas de atención primaria dirigidos a lo consumo prejudicial de drogas. Método Se trata de un estudio cualitativo, desarrollado en la perspectiva dialéctica crítica. La recolección de datos se realizó a través de entrevistas semiestructuradas con 10 empleados de una Unidad Básica de Salud. Resultados Muestran que: las demandas no son aceptadas, y si van más allá de las barreras - formadas por la ausencia histórica de la práctica de la atención de salud para los consumidores de drogas y las ideologías morales y preconcebidas -, no son reinterpretados como necesidades de salud; las prácticas que satisfagan esas demandas son pobres; detrás de estas escasas prácticas, está la perspectiva funcionalista, que considera el uso de drogas como una enfermedad y los usuarios de drogas como desviados; los trabajadores valoran la formación clínica y culpan a los usuarios por los problemas que enfrentan. Conclusión Se pode concluir que la atención primaria: es equívoca hacia el objeto de la dependencia; carece de los elementos estructurales del proceso de producción en la salud y las dinámicas internas de los procesos de trabajo que fomenten el desarrollo de las prácticas colectivas.

 .


Objetivo Analisar as práticas de atenção básica voltadas ao consumo prejudicial de drogas. Método Estudo qualitativo, desenvolvido na perspectiva dialético-crítica. A coleta de dados foi realizada através de entrevistas semiestruturadas com 10 trabalhadores de uma Unidade Básica de Saúde (UBS). Resultados As demandas não são acolhidas e, quando ultrapassam as barreiras - conformadas pela ausência histórica de práticas de atenção à saúde ao usuário de drogas e por ideologias moralistas e preconceituosas -, não são reinterpretadas como necessidades de saúde; as práticas que atendem essas demandas são precárias; a perspectiva funcionalista, que compreende o consumo de drogas como doença e considera usuários de drogas como desviantes, embasa as escassas práticas existentes. Conclusão A atenção básica encontra-se equivocamente voltada para a dependência; carece de elementos estruturais do processo de produção em saúde e da dinamicidade interna aos processos de trabalho, que favoreceriam o desenvolvimento de práticas coletivas. .


Asunto(s)
Adulto , Anciano , Femenino , Humanos , Masculino , Persona de Mediana Edad , Factores de Crecimiento Endotelial/metabolismo , Linfocinas/metabolismo , Óxido Nítrico Sintasa/metabolismo , Neoplasias Gástricas/irrigación sanguínea , Neoplasias Gástricas/metabolismo , Inmunohistoquímica , Microcirculación/patología , Estadificación de Neoplasias , Neovascularización Patológica , Óxido Nítrico Sintasa de Tipo II , Pronóstico , Neoplasias Gástricas/patología , Factor A de Crecimiento Endotelial Vascular , Factores de Crecimiento Endotelial Vascular
4.
Rev. Esc. Enferm. USP ; 48(spe): 122-128, 08/2014. tab
Artículo en Inglés | LILACS, BDENF | ID: lil-731299

RESUMEN

Objective To assess primary health care attributes of access to a first contact, comprehensiveness, coordination, continuity, family guidance and community orientation. Method An evaluative, quantitative and cross-sectional study with 35 professional teams in the Family Health Program of the Alfenas region, Minas Gerais, Brazil. Data collection was done with the Primary Care Assessment Tool - Brazil, professional version. Results Results revealed a low percentage of medical experts among the participants who evaluated the attributes with high scores, with the exception of access to a first contact. Data analysis revealed needs for improvement: hours of service; forms of communication between clients and healthcare services and between clients and professionals; the mechanism of counter-referral. Conclusion It was concluded that there is a mismatch between the provision of services and the needs of the population, which compromises the quality of primary health care.


 .


Objetivo Evaluar la atención primaria de salud a través de las cualidades: Acesso de Primero Contacto, Intregidad, Coordinación, Longitudinalidad, Orientación Familiar, Orientación Comunitaria. Método Se trata de una evaluación cuantitativa y estudio transverso con 35 equipos de profesionales de la Estrategia de Salud de la Familia, de región de Alfenas, Minas Gerais, Brasil. Para recopilar los datos, se utilizó el Instrumento de Evaluación de la Atención Primaria - Brasil , la versión Professional. Resultados Los datos revelaron un bajo porcentaje de especialistas médicos en Atencion Primaria de Salud. Los participantes evaluó las calidades con puntajes altos, con la excepción de Acceso Primero Contacto. El análisis de datos reveló una mejora necesidades: horarios de apertura de los servicios; las formas de comunicación entre el usuario y el servicio y entre el usuario y el profesional, la remissión y consulta. Conclusión Existe un desajuste entre la oferta de servicios y las necesidades de la población, lo que compromete la calidad de la Atención Primaria de Salud.
 .


Objetivo Avaliar a Atenção Primária à Saúde por meio dos atributos: Acesso de Primeiro Contato, Integralidade, Coordenação, Longitudinalidade, Orientação Familiar, Orientação Comunitária. Método Estudo avaliativo, quantitativo e transversal, realizado com 34 profissionais de equipes da Estratégia de Saúde da Família da microrregião de Alfenas, Minas Gerais, Brasil. Para a coleta de dados, foi utilizado o Primary Care Assessment Tool – Brasil, versão profissionais. Resultados Os dados revelaram baixo percentual de profissionais médicos especialistas em Atenção Primária à Saúde. Os participantes avaliaram os atributos com altos escores, com exceção do Acesso de Primeiro Contato. A análise dos dados revelou necessidades de aperfeiçoamento: o horário de funcionamento dos serviços; as formas de comunicação entre usuário e serviço, e entre usuário e profissionais; o mecanismo de contrarreferência. Conclusão Existe um descompasso entre a oferta de serviços e as necessidades da população que compromete a qualidade da Atenção Primária a Saúde.
 .


Asunto(s)
Humanos , Endotelio Vascular/enzimología , Fosfotransferasas (Aceptor de Grupo Alcohol)/genética , Esfingosina/análogos & derivados , Neoplasias Gástricas/enzimología , Neoplasias Gástricas/genética , Comunicación Celular , División Celular/efectos de los fármacos , Línea Celular , Medios de Cultivo Condicionados , Endotelio Vascular/efectos de los fármacos , Endotelio Vascular/patología , Inhibidores Enzimáticos/farmacología , Expresión Génica , Fosfotransferasas (Aceptor de Grupo Alcohol)/antagonistas & inhibidores , ARN Mensajero/genética , ARN Neoplásico/genética , Esfingosina/farmacología , Neoplasias Gástricas/irrigación sanguínea , Células Tumorales Cultivadas
5.
Rev. Esc. Enferm. USP ; 48(spe): 116-121, 08/2014.
Artículo en Inglés | LILACS, BDENF | ID: lil-731301

RESUMEN

Objective Identify nurses’ emancipatory practices in primary care, to contribute to the improvement of health care. Method A case study type social research of qualitative nature, in which nurses of a primary health care service unit in São Paulo were interviewed. Results The home visit was identified as a nursing practice possible to be expanded in order to identify social determinants of health, triggering emancipatory practices in the service. This expansion occurred because the design of health care labour intended by the service team changed its focus from the traditional object of health services, the disease. Conclusion First, it is advocated that social policies lead projects with the purpose of improving health needs. On the other hand, the daily labour needs to provide opportunities for reflection and discussion of healthcare projects, leading workers to propose labour-processes targeted to both the social determinants of health and people’s illness. .


Objetivo Identificar las prácticas emancipadoras de enfermeras en Unidad de Salud Familiar fueron el objeto de este estudio. Método La investigación social cualitativa tipo estúdio de caso. Fueron entrevistados enfermeros de una Unidad de Salud Familiar en Sao Paulo. Resultados Se identificó que la Visita Domiciliaria ha ampliado su alcance y identificado determinantes del proceso salud-enfermedad, lo que provocó en la Unidad de Salud Familiar prácticas emancipadoras. Esta expansión se produjo debido a que el diseño de la atención en propósito por la USF amplió el tradicional objeto de los servicios de salud. Conclusión Se aboga que las directrices de las políticas sociales basen proyectos que tengan como fin el mejoramiento de las necesidades de salud y que el trabajo diario proporcione la reflexión y discusión de los proyectos de atención, para proponer prácticas que enfoquen en los determinantes del proceso salud-enfermedad, tanto cuanto en sus resultados - la enfermedad en el cuerpo individual. .


Objetivo Identificar as práticas emancipatórias de enfermeiros da Atenção Primária, com a finalidade de contribuir para o aprimoramento do cuidado em saúde. Método Pesquisa social de natureza qualitativa, do tipo estudo de caso. Foram entrevistados os enfermeiros de uma Unidade de Saúde da Família em São Paulo. Resultados Identificou-se que a visita domiciliária, prática protocolar, ampliou seu escopo e identificou determinantes do processo saúde-doença, desencadeando na Unidade de Saúde da Família práticas emancipatórias. Essa ampliação ocorreu porque o projeto de cuidado intencionalizado ampliou o objeto tradicional dos serviços de saúde. Conclusão Advoga-se que as diretrizes das políticas sociais ancorem projetos que tomem como finalidade o aprimoramento das necessidades de saúde e que o cotidiano do trabalho proporcione reflexão e discussão dos projetos de cuidado, para intencionalizar práticas que incidam nos determinantes do processo saúde-doença, tanto quanto nos resultados - a doença expressa no corpo individual. .


Asunto(s)
Humanos , Proteínas Tirosina Quinasas Receptoras/genética , Receptores de Factores de Crecimiento/genética , Neoplasias Gástricas/genética , Comunicación Celular , División Celular/efectos de los fármacos , Línea Celular , Medios de Cultivo Condicionados , Factores de Crecimiento Endotelial/metabolismo , Endotelio Vascular/metabolismo , Endotelio Vascular/patología , Expresión Génica , Linfocinas/metabolismo , Neovascularización Patológica , Oligodesoxirribonucleótidos Antisentido/genética , Oligodesoxirribonucleótidos Antisentido/farmacología , ARN Mensajero/genética , ARN Neoplásico/genética , Receptores de Factores de Crecimiento Endotelial Vascular , Neoplasias Gástricas/irrigación sanguínea , Neoplasias Gástricas/patología , Células Tumorales Cultivadas , Factor A de Crecimiento Endotelial Vascular , Factores de Crecimiento Endotelial Vascular
6.
West Indian med. j ; 57(1): 2-6, Jan. 2008. ilus, tab
Artículo en Inglés | LILACS | ID: lil-672347

RESUMEN

AIM: This study examined the correlation between P53 and vascular endothelial growth factor (VEGF) expression together with tumour vascularity and investigated their clinical significance in the prognosis of gastric carcinoma. SUBJECTS AND METHODS: Ninety-five patients with gastric carcinoma who underwent curative surgical resection were studied using immunohistochemical staining. Correlation between the expression of p53, VEGF, microvessel count (MVC) and various clinicopathologic factors were studied. RESULTS: No significant correlation was found between p53 expression and clinicopathologic factors. The rate of VEGF positivity was significantly higher in patients with haematogenous metastasis than in those without haematogenous metastasis. Both p53 and VEGF expression were associated with MVC. The MVC in p53 positive tumours was significantly higher than that in p53 negative tumours. Similarly, the same trend was seen between VEGF expression and MVC. The p53 and VEGF were co-expressed in 61 of 95 tumours (64.2%), and a significant (p < 0.01) association between p53 and VEGF expressions was demonstrated. The rate of VEGF positivity was significantly (p < 0.01) higher in the patients with disease recurrence than in those without recurrence, whereas no significant correlation was found between disease recurrence and the expression of p53. CONCLUSIONS: The p53 expression may play an important role in controlling angiogenesis by regulating VEGF expression and VEGF expression is associated closely with disease recurrence. In addition, both p53 and VEGF expression might be useful in indicating the prognosis in patients with gastric carcinoma.


OBJETIVO: Este estudio examinó la correlación entre el P53 y la expresión del factor de crecimiento del endotelio vascular (VEGF) junto con las vascularidad del tumor, e investigó su importancia clínica en la prognosis del carcinoma gástrico. SUJETOS Y MÉTODOS: Noventa y nueve pacientes con carcinoma gástrico que fueron sometidos a resección quirúrgica curativa, fueron estudiados usando teñido inmunohistoquímico. Se estudió la correlación entre la expresión de p53, VEGF, el conteo de microvasos (MVC) y varios factores clínico-patológicos. RESULTADOS: No se halló una correlación significativa entre la expresión de p53 y los factores clínico-patológicos. La tasa de positividad de VEGF, fue significativamente más alta en pacientes con metástasis hematogénica que en pacientes sin metástasis hematogénica. Tanto la expresión de p53 como la de VEGF estuvieron asociadas con el conteo MVC. El MVC en tumores p53 positivos fue significativamente más alto que en tumores p53 negativos. De manera similar, la misma tendencia se observó entre la expresión de VEGF y MVC. El p53 y el VEGA fueron co-expresados en 61 de 95 tumores (64.2%), y se demostró una asociación significativa (p < 0.01) entre las expresiones de p53 y VEGA. La tasa de positividad VEGA fue significativamente más alta (p < 0.01) en los pacientes con recurrencia de la enfermedad que en aquellos sin recurrencia, en tanto que no se halló una correlación significativa entre la recurrencia de la enfermedad y la expresión de p53. CONCLUSIONES: La expresión p53 puede desempeñar un importante papel en el control de la angiogénesis mediante la regulación de la expresión de VEGF y la expresión de VEGF está estrechamente asociada con la recurrencia de la enfermedad. Además, tanto la expresión de p53 como la de VEGF podrían ser útiles para indicar la prognosis de pacientes con carcinoma gástrico.


Asunto(s)
Adulto , Anciano , Femenino , Humanos , Masculino , Persona de Mediana Edad , Recurrencia Local de Neoplasia/metabolismo , Neoplasias Gástricas/metabolismo , /metabolismo , Factor A de Crecimiento Endotelial Vascular/metabolismo , Estudios de Cohortes , Microvasos , Pronóstico , Neoplasias Gástricas/irrigación sanguínea
7.
Korean Journal of Radiology ; : 119-127, 2008.
Artículo en Inglés | WPRIM | ID: wpr-82041

RESUMEN

OBJECTIVE: To investigate the relationship between the perfusion CT features and the clinicopathologically determined prognostic factors in advanced gastric cancer cases. MATERIALS AND METHODS: A perfusion CT was performed on 31 patients with gastric cancer one week before surgery using a 16-channel multi-detector CT (MDCT) instrument. The data were analyzed with commercially available software to calculate tumor blood flow (BF), blood volume (BV), mean transit time (MTT), and permeability surface (PS). The microvessel density (MVD), was evaluated by immunohistochemical staining of the surgical specimens with anti-CD34. All of the findings were analyzed prospectively and correlated with the clinicopathological findings, which included histological grading, presence of lymph node metastasis, serosal involvement, distant metastasis, tumor, node, metastasis (TNM) staging, and MVD. The statistical analyses used included the Student's t-test and the Spearman rank correlation were performed in SPSS 11.5. RESULTS: The mean perfusion values and MVD for tumors were as follows: BF (48.14+/-16.46 ml/100 g/min), BV (6.70+/-2.95 ml/100 g), MTT (11.75+/-4.02 s), PS (14.17+/-5.23 ml/100 g/min) and MVD (41.7+/-11.53). Moreover, a significant difference in the PS values was found between patients with or without lymphatic involvement (p = 0.038), as well as with different histological grades (p = 0.04) and TNM stagings (p = 0.026). However, BF, BV, MTT, and MVD of gastric cancer revealed no significant relationship with the clinicopathological findings described above (p > 0.05). CONCLUSION: The perfusion CT values of the permeable surface could serve as a useful prognostic indicator in patients with advanced gastric cancer.


Asunto(s)
Adulto , Anciano , Femenino , Humanos , Masculino , Persona de Mediana Edad , Metástasis Linfática , Microcirculación , Pronóstico , Estudios Prospectivos , Flujo Sanguíneo Regional , Neoplasias Gástricas/irrigación sanguínea , Tomografía Computarizada por Rayos X
8.
Journal of Korean Medical Science ; : 592-597, 2008.
Artículo en Inglés | WPRIM | ID: wpr-9482

RESUMEN

Lymph node metastasis is an important prognostic factor in gastric cancer. Vascular endothelial growth factor-D (VEGF-D) is a lymphangiogenic growth factor that activates VEGF receptor (VEGFR)-3, a receptor expressed in the lymphatic endothelium. We investigated the clinical value of VEGF-D expression and VEGFR-3 positive vessel density in gastric carcinoma with regard to lymphangiogenesis. Immunohistochemical staining was used to determine the expression of VEGF-D and VEGFR- 3 in specimens from 104 cases of resected gastric cancer. VEGF-D expression was observed in 62.5% of the gastric cancers and in 9.6% of the non-neoplastic gastric tissue. The VEGFR-3-positive vessel density was significantly greater in the VEGFD positive group than the negative group. VEGF-D expression was significantly associated with lymph node metastasis, increased serum CEA levels, and the nonsignet ring cell type. The VEGFR-3-positive vessel density was correlated with tumor size, lymphatic invasion, and lymph node metastasis. The VEGF-D expression and high VEGFR-3-positive vessel density were significant poor prognostic factors for relapse-free survival. These results suggest that VEGF-D and VEGFR-3-positive vessel density are potential molecular markers that predict lymphatic involvement in gastric carcinoma.


Asunto(s)
Adulto , Anciano , Femenino , Humanos , Masculino , Persona de Mediana Edad , Inmunohistoquímica , Metástasis Linfática , Pronóstico , Neoplasias Gástricas/irrigación sanguínea , Factor D de Crecimiento Endotelial Vascular/análisis , Receptor 3 de Factores de Crecimiento Endotelial Vascular/análisis
9.
Journal of Korean Medical Science ; : S109-S114, 2007.
Artículo en Inglés | WPRIM | ID: wpr-209048

RESUMEN

Thymidine phosphorylase (TP) has shown to be up-regulated in several cancers and to play a role in angiogenesis and invasion. Most studies regarding TP have focused on cancer cells. Recently, evidences suggest that TP in cancer-infiltrating inflammatory cells (CIICs) also affect the cancer cell behavior. To evaluate the significance of TP expression of CIICs in gastric cancer, we assessed TP expression of cancer cells and CIICs separately using immunohistochemical assay on 116 paraffin-embedded tissue samples from stomach cancer patients and investigated their clinical significance. When subjects were divided into 4 groups according to the TP expression: cancer/matrix (+/+), C/M (+/-), C/M (-/+), and C/M (-/-), intratumoral microvessel density scores were higher in the C/M (+/-) group than in the C/M (-/-) group (p=0.02). For lymph node metastasis and survival, there were no significant differences among the 4 groups. However, there were significant differences in survival (p=0.035) and LN metastasis (p=0.023) between the two groups divided by TP expression of CIICs alone irrespective of TP expression of cancer cells. Taken together, this study suggested the TP expression in CIICs could affect lymph node metastasis and patients' survival in gastric cancer.


Asunto(s)
Adulto , Anciano , Femenino , Humanos , Masculino , Persona de Mediana Edad , Inmunohistoquímica , Inflamación/enzimología , Metástasis Linfática , Linfocitos Infiltrantes de Tumor/enzimología , Microcirculación/patología , Neovascularización Patológica , Pronóstico , Neoplasias Gástricas/irrigación sanguínea , Timidina Fosforilasa/metabolismo
10.
Journal of Korean Medical Science ; : 272-278, 2006.
Artículo en Inglés | WPRIM | ID: wpr-162130

RESUMEN

Angiogenesis, formation of new microvessels providing oxygen and nutrient supply, is essential for tumor growth. It is dependent on the production of angiogenic growth factors by tumor cells. Angiopoietin 1 (Ang-1) and 2 (Ang-2) and their common receptor, Tie2, are thought to be critical regulators of tumor angiogenesis. We examined expression of Ang-1, Ang-2, and their common receptor Tie2 mRNAs and proteins in gastric cancers using in situ hybridization and immunohistochemistry. We also investigated the relationship between their expression and differentiation of cancer cells, lymph node metastasis, tumor size, depth of cancer cell invasion, TNM staging and microvessel density (MVD). The expression of Ang-1, Ang-2, and Tie2 mRNA in cancer cells significantly correlated with the MVD (p<0.001, <0.001 and =0.019, respectively). Ang-1 and Tie2 positivity correlated with advanced gastric cancers (p<0.05) and larger cancers had higher positive rates of Ang-1, Ang-2, and Tie2 mRNA expression (p<0.001, =0.010 and =0.039, respectively). Significant positive correlations were also found between mRNA expression of Tie2 and those of Ang-1 and Ang-2 (p<0.01 and <0.001, respectively). These findings indicate that the expression of Ang-1 and Ang-2 is important for tumor angiogenesis, and suggest a possible role of autocrine/paracrine function of angiopoietin/Tie2 system in gastric cancer progression.


Asunto(s)
Persona de Mediana Edad , Masculino , Humanos , Femenino , Anciano , Adulto , Neoplasias Gástricas/irrigación sanguínea , Receptor TIE-2/genética , ARN Neoplásico/genética , ARN Mensajero/genética , Neovascularización Patológica , Hibridación in Situ , Inmunohistoquímica , Expresión Génica , Carcinoma de Células en Anillo de Sello/irrigación sanguínea , Angiopoyetina 2/genética , Angiopoyetina 1/genética , Adenocarcinoma/irrigación sanguínea
11.
The Korean Journal of Gastroenterology ; : 196-203, 2005.
Artículo en Coreano | WPRIM | ID: wpr-70848

RESUMEN

BACKGROUND/AIMS: Phosphatase and tensin homolog deleted on chromosome ten (PTEN) is a recently clarified tumor suppressor gene located in 10q23.3. Alterations of this gene are associated with tumor progression and unfavorable outcome in various human cancers. Recently, PTEN has a possible role in angiogenesis by modulating angiogenic factor including vascular endothelial growth factor (VEGF). The aim of this study was to investigate the roles of PTEN and VEGF status for angiogenesis in human gastric cancer. METHODS: We conducted an immunohistochemical investigation of PTEN and VEGF expression in 90 cases of paraffin section obtained from gastric cancer patients undergone surgical treatment. RESULTS: Negative expression of PTEN and positive expression of VEGF in gastric cancer tissues, were demonstrated in 40.0% and 77.8% of cases, respectively. However, no significant correlation was found between PTEN, VEGF expression and various clinicopathological parameters. PTEN expression did not correlate significantly with VEGF expression (p=0.301). High microvessel density (MVD) was significantly associated with lymph node metastasis and poor survival (p=0.014, 0.011, respectively). The mean MVD value of PTEN negative tumors was 90.4+/-43.0 and significantly higher than that of PTEN positive tumors (p=0.028). The mean MVD value of VEGF positive tumors was 86.4+/-36.7 and significantly higher than that of VEGF negative tumors (p=0.002). The mean MVD value of PTEN negative and VEGF positive tumors was 98.0+/-42.2, and significantly higher than those of the others. CONCLUSIONS: These results suggest that loss of PTEN expression may play a critical role in tumor progression and metastasis by stimulating tumor angiogenesis in human gastric cancer.


Asunto(s)
Adulto , Anciano , Femenino , Humanos , Masculino , Persona de Mediana Edad , Carcinoma/irrigación sanguínea , Progresión de la Enfermedad , Inmunohistoquímica , Microcirculación/patología , Neovascularización Patológica/metabolismo , Fosfohidrolasa PTEN/metabolismo , Neoplasias Gástricas/irrigación sanguínea , Tasa de Supervivencia , Factor A de Crecimiento Endotelial Vascular/metabolismo
12.
The Korean Journal of Internal Medicine ; : 211-219, 2002.
Artículo en Inglés | WPRIM | ID: wpr-55447

RESUMEN

BACKGROUND: Angiogenesis is of crucial importance for tumor growth and development of metastases. Vascular endothelial growth factor (VEGF) has a potent angiogenic activity and mutations of the p53 gene has been thought to upregulate VEGF. The purpose of our study was to evaluate the prognostic significance of these tumor biomarkers for angiogenesis relative to the information derived from established clinicopathological parameters in gastric cancer. METHODS: In this study, we conducted an immunohistochemical investigation of VEGF and p53 expression in 145 tissue samples obtained from gastric cancer patients undergoing curative surgical treatment. To evaluate angiogenesis, microvessel density (MVD) was counted by staining endothelial cells immunohistochemically using anti-CD34 monoclonal antibody. RESULTS: High MVD was significantly associated with depth of tumor invasion and distant metastasis (p=0.004, 0.021, respectively). Moreover, overall survival for patients with high MVD were significantly lower than that of low MVD (p=0.048). Positive expression of VEGF correlated significantly with lymph node and distant metastasis (p=0.040, 0.048, respectively). However, no significant correlation was found between p53 expression and various clinicopathological parameters. VEGF positive tumors showed a higher MVD than VEGF negative tumors (p=0.028). The expression of p53 did not correlate with VEGF expression. Also, the relationship between the status of p53 expression and MVD had not statistically significant differences. In the multivariate analysis, status of VEGF, p53 expression and MVD were not an independent prognostic factor. CONCLUSION: VEGF seems to be an important, clinically relevant inducer of angiogenesis and angiogenesis assessed by the MVD may be a useful marker for predicting metastasis in gastric cancer. However, further studies are warranted to clarify the impact of p53 on the angiogenesis and the prognostic significance of angiogenesis in gastric cancer.


Asunto(s)
Adulto , Anciano , Femenino , Humanos , Masculino , Persona de Mediana Edad , Factores de Crecimiento Endotelial/biosíntesis , Inmunohistoquímica , Neovascularización Patológica , Proteína p53 Supresora de Tumor/biosíntesis , Neoplasias Gástricas/irrigación sanguínea
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA