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European Hematology Association: Hierro: una espada de doble filo en la inflamación
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European Hematology Association

Jun 15, 2018, 06:13 ET

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ESTOCOLMO, June 15, 2018 /PRNewswire/ --

El hierro es un elemento vital para varias funciones biológicas, la primera de ellas el suministro de oxígeno hacia los tejidos, que se produce por medio de la molécula que contiene hierro hemoglobina dentro de los glóbulos rojos (RBC). El hierro desempeña papeles clave en las inflamaciones e infecciones: por una parte, el hierro es necesario para llevar a cabo la función propia del sistema inmune, pero por otra parte, demasiado hierro propicia el crecimiento de micro-organismos.

     (Logo: http://mma.prnewswire.com/media/622259/EHA_Logo.jpg )

Los macrófagos son células cruciales del sistema inmune innato que presentan dos funciones importantes: 1) eliminar viejos RBCs de la sangre y del hierro almacenado derivado de la hemoglobina; 2) 'comerse' y matar a los patógenos, incluyendo las bacterias, virus y hongos. Es por ello que los macrófagos son esenciales para el metabolismo del hierro y la protección de las infecciones.

Hay varias enfermedades patológicas asociadas a una acumulación de hierro excesiva en los macrófagos, incluyendo la anemia dependiente de transfusión, en la que los RBCs transfundidos se eliminan por medio de los macrófagos; enfermedad celular de siega y tratados con anemia con preparaciones de hierro intravenosas, donde la hemoglobina libre y el hierro se acumulan en los macrófagos, respectivamente.

El objetivo de nuestra investigación ha sido estudiar si la acumulación de hierro en estas tres diferentes condiciones patológicas causa la inflamación del macrófago y la producción de las moléculas inflamatorias y analizan las consecuencias. Nuestros resultados demuestran que las transfusiones suprimen la inflamación. Este efecto puede predisponer a los pacientes transfundidos a infecciones graves, llevando finalmente a un fallo en los órganos. Por otra parte, la hemoglobina libre y hierro tiene una acción inflamatoria en los macrófagos, que empeora con las infecciones. Este efecto causa una inflamación crónica y daño en los tejidos en pacientes segados y en pacientes tratados con hierro.

Hemos llegado a la conclusión de que las diferentes formas de acumulación de hiero en los macrófagos (RBCs frente a hemoglobina libre y hierro) en diferentes enfermedades, muestran efectos opuestos en la inflamación. Nuestros datos sugieren que las moléculas capaces de vincular el hierro disponen de un beneficio terapéutico en estas enfermedades por medio de la modulación de estos procesos.

Presentadora: Dr Francesca Vinchi

Afiliación: Iron Research Laboratory, New York Blood Center, Nueva York, Estados Unidos

Tema: LAS TRANFUSIONES CRÓNICAS DE GLÓBULOS ROJOS INCAPACITAN LA RESPUESTA INMUNE INNATA A LAS RESPUESTAS INFECCIOSAS AL MODELAR LOS MACRÓFAGOS HACIA UN FENOTIPO FUNCIONAL ANTI-INFLAMATORIO

El abstracto S152 lo presentará Francesca Vinchi el viernes 15 de junio de 16:30 a 16:45 en la sala A1.

Embargo

Tenga en cuenta que nuestra política de embargo se aplica a todos los abstractos seleccionados en los resúmenes de prensa. Para más información, consulte nuestras directrices para los medios del Congreso aquí.

Página web: www.ehaweb.org

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