Biología molecular del cáncer epitelial de ovario
Molecular biology of epithelial ovarian cancer
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Introducción: el cáncer epitelial de ovario es una neoplasia heterogénea y de alta mortalidad, caracterizada por diversos subtipos histológicos y moleculares que condicionan su comportamiento clínico, pronóstico y respuesta terapéutica. El carcinoma seroso de alto grado es el subtipo más frecuente y se asocia a diagnóstico en estadios avanzados y elevada tasa de recurrencia.
Métodos: se realizó una revisión narrativa de la literatura científica sobre los aspectos histopatológicos, moleculares y terapéuticos del cáncer epitelial de ovario, con énfasis en la caracterización molecular, los avances en terapias dirigidas y el papel emergente de la biopsia líquida.
Resultados: el carcinoma seroso de alto grado presenta una marcada inestabilidad genómica, mutaciones en TP53 y alteraciones en la vía de recombinación homóloga, especialmente mutaciones germinales o somáticas en BRCA1/2, lo que ha permitido la incorporación de inhibidores de PARP como estrategia terapéutica. Otros subtipos menos frecuentes (endometrioide, de células claras, mucinoso y seroso de bajo grado) exhiben perfiles moleculares distintos, con mutaciones recurrentes en ARID1A, PIK3CA, KRAS o CTNNB1, que tienen implicaciones pronósticas y terapéuticas específicas. La clasificación transcriptómica propuesta por The Cancer Genome Atlas (TCGA) identifica subtipos inmunorreactivo, mesenquimal, proliferativo y diferenciado, reflejando la complejidad biológica del tumor. Asimismo, las estrategias de mantenimiento con terapias dirigidas, como bevacizumab y los inhibidores de PARP (olaparib, niraparib y rucaparib), han demostrado mejorar los desenlaces en pacientes seleccionadas. La biopsia líquida emerge como una herramienta prometedora para el monitoreo dinámico de la enfermedad y la detección temprana de recurrencias.
Conclusiones: la integración de la información clínica, molecular y del microambiente tumoral es fundamental para avanzar hacia un manejo verdaderamente personalizado del cáncer epitelial de ovario, optimizando la selección terapéutica y mejorando los resultados clínicos.
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