Las isoflavonas de soja podrían modificar el riesgo de cáncer de mama

Las mujeres con un mayor consumo tenían alrededor de un 30 por ciento menos de riesgo de tener cáncer de mama invasivo y aproximadamente un 60 por ciento menos de riesgo de tener un tumor en grado 1.

Europa Press, miércoles, 10 de noviembre de 2010

Los fitoestrógenos que se encuentran en la soja de la dieta podrían modificar el riesgo de algunos tipos de cáncer de mama, según un estudio del Instituto del Cáncer del Parque Roswell de la Universidad de Buffalo (Estados Unidos) que se ha hecho público durante la conferencia anual de investigación para la prevención del cáncer que se celebra en Filadelfia.

"Este estudio fue único en que examinamos subtipos específicos de cáncer de mama y descubrimos indicios de que el estatus menopáusico podría jugar un papel en el riesgo", explica Anne Weaver, responsable del estudio.

El equipo de Weaver evaluó a 683 mujeres con cáncer de mama y las comparó con 611 mujeres sanas. Los patrones de datos dietéticos se observaron utilizando un cuestionario de frecuencia alimentaria y las isoflavonas se midieron como parte de la dieta en vez de cómo suplementos. El consumo de isoflavonas se dividió en tres grupos.

Las mujeres con un mayor consumo tenían alrededor de un 30 por ciento menos de riesgo de tener cáncer de mama invasivo y aproximadamente un 60 por ciento menos de riesgo de tener un tumor en grado 1.

Las observaciones del estado menopáusico revelaron que entre las mujeres premenopausicas el mayor consumo de isoflavonas se asociaba con un 30 por ciento menos de riesgo de enfermedad en fase I y un 70 por ciento menos de riesgo de tener un tumor mayor de 2 centímetros y un 60 por ciento menos de riesgo de tener cáncer de mama en fase 2. Estas conexiones no se observaron entre las mujeres postmenopáusicas.

Como en la mayoría de estudios sobre la dieta, Weaver señala que los resultados no son definitivos y necesitan ser considerados en el contexto de un seguimiento y confirmación posteriores.

"Aún así, definitivamente vimos una reducción que merece posteriores investigaciones", concluye la investigadora.
http://www.diariosalud.net/index.php?option=com_content&task=view&id=21078&Itemid=413

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