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1.
Arch Soc Esp Oftalmol ; 79(6): 281-8, 2004 Jun.
Article in Spanish | MEDLINE | ID: mdl-15221674

ABSTRACT

PURPOSE: To determine, by means of immunohistochemistry, tumoral expression of collagenase-3, a matrix metalloproteinase linked to cancer and to basal cell and squamous cell carcinomas of the eyelid. MATERIAL AND METHOD: Retrospective review of 23 basal cell carcinomas and 25 squamous cell carcinomas of the eyelid treated at different hospitals during the last five years. We evaluated collagenase-3 expression and the possible relationship to patient and tumour characteristics which included age, sex, histological type, tumour location and surgical margins status. RESULTS: 65% of the basal cell carcinomas and 88% of the squamous cell carcinomas of the eyelids stained positively for collagenase-3. In both cases, the immunostaining was localized in the cytoplasm of the malignant cells and, occasionally in the surrounding stromal cells. CONCLUSIONS: Statistical analysis showed no significant association between collagenase-3 immunostaining and patients or tumour characteristics but the expression of this protein was more intense in the epithelial tumoral cells located at the invading front which could explain the aggressive behaviour of this kind of tumours.


Subject(s)
Carcinoma, Basal Cell/enzymology , Carcinoma, Squamous Cell/enzymology , Collagenases/biosynthesis , Eyelid Neoplasms/enzymology , Adult , Aged , Aged, 80 and over , Carcinoma, Basal Cell/pathology , Carcinoma, Squamous Cell/pathology , Eyelid Neoplasms/pathology , Female , Humans , Male , Matrix Metalloproteinase 13 , Middle Aged , Retrospective Studies
2.
Arch. Soc. Esp. Oftalmol ; 79(6): 281-288, jun. 2004. tab, ilus
Article in Spanish | IBECS | ID: ibc-81424

ABSTRACT

Objetivo: Determinar por inmunohistoquímica la expresión de colagenasa-3, metaloproteasa de matriz extracelular recientemente involucrada en el cáncer, en los carcinomas basocelulares y espinocelulares de párpado. Material y método: Estudio retrospectivo de 23 carcinomas basocelulares y 25 espinocelulares de párpado tratados en diferentes centros en los últimos cinco años. Se investigó la expresión de la colagenasa-3 y su posible relación con las características de los pacientes y sus tumores tales como la edad, sexo, tipo histológico, localización y estado del margen quirúrgico de resección. Resultados: Hemos detectado una expresión inmunohistoquímica positiva para la colagenasa-3 en un 65% de los carcinomas basocelulares y en un 88% de los carcinomas espinocelulares de párpado. Dicha tinción se localiza en el citoplasma de la mayoría de células tumorales y ocasionalmente en los fibroblastos peritumorales. Conclusiones: Aunque no hemos encontrado diferencias estadísticamente significativas entre la expresión tumoral de colagenasa-3 y las variables estudiadas, la expresión de esta proteína es mayor en la frontera de la invasión tumoral de los carcinomas espinocelulares, lo que podría estar en relación con el comportamiento más agresivo que suelen presentar este tipo de tumores(AU)


Purpose: To determine, by means of immunohistochemistry, tumoral expression of collagenase-3, a matrix metalloproteinase linked to cancer and to basal cell and squamous cell carcinomas of the eyelid. Material and method: Retrospective review of 23 basal cell carcinomas and 25 squamous cell carcinomas of the eyelid treated at different hospitals during the last five years. We evaluated collagenase-3 expression and the possible relationship to patient and tumour characteristics which included age, sex, histological type, tumour location and surgical margins status. Results: 65% of the basal cell carcinomas and 88% of the squamous cell carcinomas of the eyelids stained positively for collagenase-3. In both cases, the immunostaining was localized in the cytoplasm of the malignant cells and, occasionally in the surrounding stromal cells. Conclusions: Statistical analysis showed no significant association between collagenase-3 immunostaining and patients or tumour characteristics but the expression of this protein was more intense in the epithelial tumoral cells located at the invading front which could explain the aggressive behaviour of this kind of tumours(AU)


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Aged , Aged, 80 and over , Eyelid Neoplasms/pathology , Matrix Metalloproteinase 13 , Carcinoma, Basal Cell/pathology , Carcinoma, Squamous Cell/pathology , Immunohistochemistry/methods
3.
Cir. Esp. (Ed. impr.) ; 68(5): 471-485, nov. 2000. tab, ilus
Article in Es | IBECS | ID: ibc-5641

ABSTRACT

Las enzimas proteolíticas han adquirido recientemente un gran interés en fisiopatología tumoral debido a su papel potencial en la degradación de los componentes principales de la matriz extracelular y membrana basal facilitando, de esa forma, la invasión tumoral y las metástasis. Las enzimas proteolíticas que son expresadas por los carcinomas humanos se agrupan en cuatro grandes familias: metaloproteinasas, aspartil-proteinasas, cisteín-proteinasas y serín-proteinasas. La expresión tumoral de la mayoría de estas enzimas ha sido asociada con un comportamiento más agresivo de los carcinomas humanos y un pronóstico desfavorable de los pacientes. Sin embargo, su expresión tumoral no siempre implica un pronóstico adverso, ya que enzimas como el activador tisular del plasminógeno, el antígeno prostático específico y el pepsinógeno C han sido asociadas con un pronóstico favorable en pacientes con cáncer de mama. Además, existen datos que sugieren que estas expresiones tumorales pueden estar rela cionadas con una vía específica de respuesta hormonal, lo que resulta demostrativo del complejo papel que pueden desempeñar las enzimas proteolíticas en la fisiopatología tumoral. Por otra parte, el resultado final de la acción de las enzimas pro teolíticas dependerá en gran medida del balance con sus inhibidores naturales, producidos por las propias células tumorales para coordinar su acción invasiva, o bien por las células estromales como mecanismo de defensa ante la progresión tumoral. Finalmente, existen datos recientes que indican que la utilización de inhibidores sintéticos de las enzimas proteolíticas puede representar una nueva y prometedora alternativa terapéutica para los carcinomas humanos (AU)


Subject(s)
Female , Male , Humans , Peptide Hydrolases/analysis , Peptide Hydrolases/pharmacokinetics , Peptide Hydrolases/metabolism , Extracellular Matrix/enzymology , Extracellular Matrix/pathology , Carcinoma/enzymology , Carcinoma/pathology , Carcinoma/diagnosis , Plasminogen Activators/analysis , Plasminogen Activators/antagonists & inhibitors , Plasminogen Activators/metabolism , Metalloproteases/analysis , Metalloproteases/metabolism , Aspartic Acid Endopeptidases/analysis , Cysteine Endopeptidases/analysis , Endopeptidases/analysis , Neoplasms/pathology , Neoplasms/enzymology , Pepsinogen A/analysis , Pepsinogen A/biosynthesis , Pepsinogen A/metabolism , Biomarkers, Tumor/analysis , Biomarkers, Tumor/metabolism , Biomarkers, Tumor/blood
4.
J Reprod Immunol ; 25(1): 51-61, 1993 Sep.
Article in English | MEDLINE | ID: mdl-8271239

ABSTRACT

The number of identifiable mast cells and the intraluminal area occupied by porphyrin deposits was studied on semithin sections from female hamster Harderian glands during the estrous cycle and pregnancy. Although the serum levels of estradiol, progesterone, luteinizing hormone and follicle stimulating hormone exhibited significant changes throughout the cycle, no correlation between these changes and the variations in the number of recognizable mast cells was observed. However both during diestrous 1 and proestrous cycles, the number of identifiable mast cells was higher at midnight than at noon (in 14 h light:10 h dark photoperiod with lights on at 07:00 h). A more exhaustive study revealed the presence of 'degranulated mast cells' which were not stained with toluidine blue. Thus, a diurnal cycle in degranulation might occur in the Harderian glands from female hamsters. No significant variations were observed in the area occupied by intraluminal porphyrin deposits during the estrous cycle. However, both the relative number of mast cells and the area occupied by intraluminal porphyrins decreased from day 4 of pregnancy to day 14 showing a strong correlation. The Harderian glands from female Syrian hamsters might provide a useful model for the study of mast cell degranulation during porphyria.


Subject(s)
Circadian Rhythm/physiology , Estrus/physiology , Harderian Gland/cytology , Mast Cells/physiology , Pregnancy, Animal/physiology , Animals , Cricetinae , Estradiol/blood , Female , Follicle Stimulating Hormone/blood , Luteinizing Hormone/blood , Mast Cells/cytology , Mast Cells/metabolism , Mesocricetus , Porphyrins/metabolism , Pregnancy , Progesterone/blood
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