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Vol. 46. Núm. 7.
Páginas 291-298 (Enero 2003)
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Vol. 46. Núm. 7.
Páginas 291-298 (Enero 2003)
Acceso a texto completo
Metabolismo oxidativo en las neoplasias ováricas
Oxidative metabolism in ovarian neoplasms
Visitas
3698
M. Sáncheza,*, G. Sáezb, M.C. Tormosb, J.V. Torresa
a Sección de Ginecología Oncológica. Departamento de Pediatría, Obstetricia y Ginecología. Facultad de Medicina y Odontología de Valencia. Valencia. España
b Sección de Toxicología Metabólica. Departamento de Bioquímica y Biología Molecular. Facultad de Medicina y Odontología de Valencia. Valencia. España
Este artículo ha recibido
Información del artículo
Resumen
Objetivo

Valorar el estatus oxidativo de las neoplasias ováricas mediante la determinación de las enzimas antioxidantes más importantes, los valores de glutatión reducido y oxidado, la formación de malondialdehído, como índice de peroxidación molecular, y el grado de oxidación del material genético mediante la cuantificación de la base mutagénica 8-oxo-deoxiguanosina

Material y métodos

Estudio prospectivo de 52 casos de neoplasia ovárica: 43 casos de cáncer de ovario epitelial, de los que nueve habían recibido quimioterapia previa a la cirugía, y otros nueve con tumoraciones benignas

Resultados

En el tejido tumoral, al compararlo con tejido sano de las mismas pacientes, se evidenció disminución de las enzimas antioxidantes catalasa y superóxido-dismutasa, así como un aumento del resto de los parámetros estudiados. La quimioterapia anuló las diferencias entre el ovario sano y el tumoral

Conclusiones

El metabolismo oxidativo se encuentra alterado en el tejido tumoral ovárico si se compara con el tejido sano de las mismas pacientes. La quimioterapia ejerce efecto sobre dicho metabolismo

Palabras clave:
Estrés oxidativo
Neoplasias ováricas
Quimioterapia
Summary
Objective

To evaluate the oxidative status of ovarian tumors by determining the most important antioxidant enzymes, oxidized and reduced glutathione levels, the formation of malondialdehyde as an index of molecular peroxidation, and the degree of genetic oxidation by quantification of the mutagenic base 8-oxodeoxiguanosine

Material and methods

We performed a prospective study of 52 cases of ovarian tumors: 43 cases were epithelial ovarian carcinoma, 9 of which had been treated with chemotherapy prior to surgery, and 9 cases corresponded to benign tumors

Results

Catalase and superoxide-dismutase were decreased, and the remaining parameters evaluated were increased in tumoral tissue compared with non-tumoral tissue from the same patients. Chemotherapy annulled differences between tumoral and non-tumoral ovarian tissue

Conclusions

Oxidative metabolism is altered in tumoral ovarian tissue compared with non-tumoral tissue from the same patients. Chemotherapy has an effect on oxidative metabolism

keywords:
Oxidative stress
Ovarian neoplasms
Chemotherapy
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