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Envejecimiento epigenético en sobrevivientes de cáncer infantil
Prerna Kumar1, Beth Speckhart2, Yanzhi Wang3
1Department of Pediatrics, University of Illinois College of Medicine Peoria.
Journal of pediatric hematology/oncology
|August 29, 2025
Resumen
Los sobrevivientes de cáncer infantil muestran un envejecimiento acelerado debido a cambios epigenéticos. La radioterapia aumenta aún más esta edad epigenética, lo que sugiere la metilación del ADN
Área de la Ciencia:
- En el campo de la oncología
- La genética
- Investigación sobre el envejecimiento
Sus antecedentes:
- Los sobrevivientes pediátricos de cáncer a menudo experimentan problemas de salud a largo plazo, incluidos signos de envejecimiento acelerado.
- Los mecanismos subyacentes de este envejecimiento avanzado no se comprenden completamente, pero se sospechan alteraciones epigenéticas.
- La modulación epigenética, particularmente la metilación del ADN, se está investigando como un posible contribuyente.
Objetivo del estudio:
- Investigar las diferencias epigenéticas de edad entre los sobrevivientes pediátricos de cáncer y sus hermanos sanos.
- Explorar la asociación entre el tratamiento previo del cáncer, específicamente la radiación, y la edad epigenética en los sobrevivientes.
Principales métodos:
- Un estudio transversal comparó a 20 sobrevivientes pediátricos de cáncer (≥5 años después del tratamiento) con 20 hermanos sanos.
- Los patrones de metilación del ADN se analizaron a partir de muestras de sangre periférica para calcular la edad epigenética.
- Los análisis estadísticos incluyeron pruebas t emparejadas o pruebas de Wilcoxon con rango de signo.
Principales resultados:
- Los sobrevivientes pediátricos de cáncer mostraron una edad epigenética significativamente mayor en comparación con sus hermanos sanos (diferencia media de 1,41 años, P=0,016).
- Los sobrevivientes que recibieron radioterapia mostraron un aumento más pronunciado de la edad epigenética en comparación con los hermanos (diferencia media de 2,55 años, P=0,012).
Conclusiones:
- Los sobrevivientes de cáncer infantil demuestran un envejecimiento epigenético acelerado en relación con sus hermanos sanos.
- La exposición a la radiación durante el tratamiento del cáncer está relacionada con un mayor aumento de la edad epigenética.
- La modulación epigenética impulsada por la metilación del ADN puede ser la causa del envejecimiento acelerado observado en los sobrevivientes pediátricos de cáncer.
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