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1.
Acta Otorrinolaringol Esp ; 59(3): 114-9, 2008 Mar.
Article in Spanish | MEDLINE | ID: mdl-18364203

ABSTRACT

INTRODUCTION AND OBJECTIVES: The successive acquisition of molecular alterations determines tumour progression. During this progression, the development of nodal metastases is one of the most important prognostic factors in laryngeal squamous cell carcinomas. The aim of this study is to analyze if, in these carcinomas, the molecular alterations in the nodal metastases are different from those present in the primary tumour. MATERIAL AND METHOD: Paired samples of primary tumour and nodal metastases from 51 patients with squamous cell carcinoma of the supraglottic larynx were studied. Using immunohistochemistry, we analyzed the expression of p53, E-cadherin, FAK, annexin A2 and HIF-1a proteins. In addition, the apoptotic index (measuring activated caspase-3) and the degree of vascularization (identified by CD34 antigen expression) were also studied. RESULTS: A close correlation in the expression of the proteins studied was observed in the nodal metastases and the corresponding primary tumour, with the exception of HIF-1a expression and the degree of vascularization. CONCLUSIONS: Most of the molecular alterations in the nodal metastases are already present in the primary tumour, suggesting that these alterations are early events in carcinogenesis.


Subject(s)
Carcinoma, Squamous Cell/secondary , Laryngeal Neoplasms/pathology , Carcinoma, Squamous Cell/metabolism , Humans , Immunohistochemistry , Laryngeal Neoplasms/metabolism , Lymphatic Metastasis , Neoplasm Proteins/biosynthesis
2.
Acta otorrinolaringol. esp ; 59(3): 114-119, mar. 2008. ilus, tab
Article in Es | IBECS | ID: ibc-63016

ABSTRACT

Introducción y objetivos: Presentar alteraciones moleculares sucesivas determina la progresión tumoral. Durante esta progresión, el desarrollo de metástasis ganglionares es uno de los determinantes más importantes del pronóstico de los carcinomas de laringe. En este estudio se analizará si en estos carcinomas las alteraciones moleculares en las metástasis ganglionares difieren de las de su correspondiente tumor primario. Material y método: Se estudian muestras apareadas de tumor y metástasis ganglionares de 51 pacientes con carcinoma epidermoide supraglótico. Se determina, mediante inmunohistoquímica, la expresión de las proteínas p53, E-cadherina, anexina A2, FAK, y HIF-1a, y además la actividad apoptótica (mediante la expresión de caspasa-3 activada) y el grado de vascularización (identificando los vasos por la expresión del antígeno CD34). Resultados: Se apreció una marcada correlación en la expresión de las proteínas estudiadas en las metástasis y su correspondiente tumor primario, con la excepción de la expresión de HIF-1a y el grado de vascularización tumoral. Conclusiones: La mayoría de las alteraciones moleculares en las metástasis ganglionares ya están presentes en el tumor primario, lo que indica que estas alteraciones suceden de forma temprana en la carcinogénesis


Introduction and objectives: The successive acquisition of molecular alterations determines tumour progression. During this progression, the development of nodal metastases is one of the most important prognostic factors in laryngeal squamous cell carcinomas. The aim of this study is to analyze if, in these carcinomas, the molecular alterations in the nodal metastases are different from those present in the primary tumour. Material and method: Paired samples of primary tumour and nodal metastases from 51 patients with squamous cell carcinoma of the supraglottic larynx were studied. Using immunohistochemistry, we analyzed the expression of p53, E-cadherin, FAK, annexin A2 and HIF-1a proteins. In addition, the apoptotic index (measuring activated caspase-3) and the degree of vascularization (identified by CD34 antigen expression) were also studied. Results: A close correlation in the expression of the proteins studied was observed in the nodal metastases and the corresponding primary tumour, with the exception of HIF-1a expression and the degree of vascularization. Conclusions: Most of the molecular alterations in the nodal metastases are already present in the primary tumour, suggesting that these alterations are early events in carcinogenesis


Subject(s)
Humans , Male , Female , Laryngeal Neoplasms/pathology , Carcinoma, Squamous Cell/secondary , Biomarkers/analysis , Laryngeal Neoplasms/metabolism , Immunohistochemistry/methods , Biomarkers, Tumor , Lymphatic Metastasis , Neoplasm Proteins/biosynthesis , Carcinoma, Squamous Cell/metabolism
3.
Acta Otorrinolaringol Esp ; 58(6): 257-62, 2007.
Article in Spanish | MEDLINE | ID: mdl-17663946

ABSTRACT

OBJECTIVE: Over-expression of annexin A2 (ANXA2) has been reported in various cancers. However, no data are available on the expression of this protein in head and neck squamous cell carcinomas (HNSCC). The objective of this preliminary study is to investigate the expression of ANXA2 in these carcinomas. MATERIAL AND METHOD: ANXA2 expression was analyzed by immunohistochemistry in paraffin-embedded sections from 9 patients with premalignant lesions and 21 patients with HNSCC. RESULTS: All dysplastic tissues showed significantly reduced ANXA2 expression compared to normal tissue. In contrast, ANXA2 expression was observed in all but one of the tumours studied. There was a significant correlation of lower ANXA2 expression with a poorer histological differentiation, larger tumours, and nodal metastases. CONCLUSIONS: Our data show for the first time that ANXA2 is expressed in head and neck squamous cell carcinomas and that its expression seems to be related with the degree of differentiation status of these tumours.


Subject(s)
Annexin A2/biosynthesis , Carcinoma, Squamous Cell/metabolism , Head and Neck Neoplasms/metabolism , Female , Humans , Male , Middle Aged
4.
Acta otorrinolaringol. esp ; 58(6): 257-262, jun.-jul. 2007. ilus
Article in Es | IBECS | ID: ibc-055474

ABSTRACT

Objetivo: La expresión de la anexina A2 (ANXA2) se ha hallado elevada en varios cánceres. Sin embargo, no hay datos disponibles de la expresión de esta proteína en los carcinomas epidermoides de cabeza y cuello. El objetivo de este estudio preliminar es investigar la expresión de la ANXA2 en estos carcinomas. Material y método: Se analizó la expresión de la ANXA2 mediante inmunohistoquímica en muestras incluidas en parafina de 9 lesiones premalignas y 21 carcinomas epidermoides de cabeza y cuello. Resultados: Todas las lesiones con displasia mostraron una reducción en la expresión de la ANXA2 respecto al tejido normal. En contraste, se apreció expresión de la ANXA2 en todos menos uno de los tumores estudiados. La disminución de la expresión de la ANXA2 en los carcinomas se correlacionó de forma significativa con una peor diferenciación histológica, con tumores de mayor tamaño y con metástasis ganglionares. Conclusiones: Nuestros datos muestran por primera vez que la ANXA2 se expresa en los carcinomas epidermoides de cabeza y cuello e indican que su expresión se relaciona con el grado de diferenciación de estos tumores


Objective: Over-expression of annexin A2 (ANXA2) has been reported in various cancers. However, no data are available on the expression of this protein in head and neck squamous cell carcinomas (HNSCC). The objective of this preliminary study is to investigate the expression of ANXA2 in these carcinomas. Material and method: ANXA2 expression was analyzed by immunohistochemistry in paraffin-embedded sections from 9 patients with premalignant lesions and 21 patients with HNSCC. Results: All dysplastic tissues showed significantly reduced ANXA2 expression compared to normal tissue. In contrast, ANXA2 expression was observed in all but one of the tumours studied. There was a significant correlation of lower ANXA2 expression with a poorer histological differentiation, larger tumours, and nodal metastases. Conclusions: Our data show for the first time that ANXA2 is expressed in head and neck squamous cell carcinomas and that its expression seems to be related with the degree of differentiation status of these tumours


Subject(s)
Male , Female , Middle Aged , Humans , Carcinoma, Squamous Cell/diagnosis , Immunohistochemistry/methods , Annexin A2 , Head and Neck Neoplasms/diagnosis , Gene Expression Regulation, Neoplastic , Gene Expression Regulation/physiology , Laryngeal Neoplasms/diagnosis
5.
Cir. Esp. (Ed. impr.) ; 72(4): 196-199, oct. 2002. tab, ilus
Article in Es | IBECS | ID: ibc-14786

ABSTRACT

Introducción y objetivos. El gen nm23-H1 es un supresor de metástasis estudiado en distintos tipos de tumores humanos. El objeto de este estudio es determinar su prevalencia en el cáncer de recto y su relación con los parámetros clinicopatológicos clásicos y con la supervivencia. Pacientes y métodos. Estudio retrospectivo inmunohistoquímico y clínico con un anticuerpo monoclonal de ratón sobre 54 pacientes con tumores de recto resecados consecutivamente con una mediana de seguimiento de 37 meses. Resultados. La positividad fue de 42 casos (77,8 por ciento) en el tumor primario frente a 6 casos (26,1 por ciento) en los ganglios metastatizados (p = 0,03). La expresión de nm23-H1 se correlaciona de forma inversa con la existencia de diseminación ganglionar (p = 0,05) y de metástasis (p = 0,03). No hubo influencia sobre la supervivencia. Conclusiones. Existe una pérdida de la expresión de nm23-H1 en las metástasis ganglionares de los tumores rectales. La determinación inmunohistoquímica de nm23-H1 en el tejido tumoral primario puede predecir la existencia de diseminación ganglionar o metástasis a distancia en el cáncer de recto (AU)


Subject(s)
Female , Male , Middle Aged , Humans , Immunohistochemistry/methods , Antibodies, Monoclonal/administration & dosage , Antibodies, Monoclonal , Neoplasm Metastasis/physiopathology , Rectal Neoplasms/diagnosis , Rectal Neoplasms/surgery , GTP-Binding Proteins/administration & dosage , Neoplasm Staging/methods , Neoplasm Staging , Retrospective Studies , Survival Rate , Gene Expression Regulation, Neoplastic/radiation effects , Gene Expression Regulation, Neoplastic/physiology , Gene Expression Regulation, Neoplastic/immunology
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