Análisis por PCR del efecto de la terapia fotodinámica sobre tumores de mama

Autores/as

DOI:

https://doi.org/10.33448/rsd-v10i12.20468

Palabras clave:

Cáncer; Expresión genética; Terapia fotodinâmica.

Resumen

La terapia fotodinámica (TFD) es una modalidad terapéutica prometedora para el tratamiento del cáncer, incluidos los tumores de mama. El daño oxidativo causado por la TFD culmina en la muerte celular, la inducción de la respuesta inmune y la consiguiente destrucción del tumor. Este estudio tuvo como objetivo evaluar el perfil de expresión genética de los genes BCL-2, BAX y HER-2 y sus proteínas después de TFD, asociándolo con necrosis causada por esta terapia bajo diferentes fluencias. Veintiocho ratas recibieron una dosis única de 7,12 7,12 - dimetilbenzantraceno (DMBA - 80 mg / kg), por sonda, para la inducción del tumor de mama. Después del crecimiento tumoral, los animales se dividieron en cuatro grupos: G1 - grupo control - tumor de mama no tratado - y grupos G2, G3 y G4 tratados con PDT utilizando Photogem@ como fotosensibilizador intersticial e irradiación, con fluencias de 50J/cm, 100J/cm y 150J/cm, respectivamente. Se recogieron muestras tumorales para su examen histológico mediante RT-qPCR. RT-qPCR mostró que el perfil de expresión genética de BCL-2, BAX y HER-2 no se alteró después de la TFD. Se observó necrosis hemorrágica y un daño vascular y celular cualitativamente mayor y se correlacionaron positivamente con la fluidez. TFD no parece inducir la modulación de genes relacionados con la apoptosis. Los resultados indican que el tipo de muerte celular estimulada por la TFD en el tumor de mama es la necrosis.

Citas

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Publicado

26/09/2021

Cómo citar

FERREIRA, I.; SILVA, G. N. da .; FERREIRA-STRIXINO, J.; GRECCO, C. .; BAGNATO, V. S. .; SALVADORI, D. M. F. .; PINTO, J. G. .; ROCHA, N. S. Análisis por PCR del efecto de la terapia fotodinámica sobre tumores de mama. Research, Society and Development, [S. l.], v. 10, n. 12, p. e459101220468, 2021. DOI: 10.33448/rsd-v10i12.20468. Disponível em: https://rsdjournal.org/index.php/rsd/article/view/20468. Acesso em: 2 jul. 2024.

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Ciencias de la salud