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Oxidantes, estrés oxidativo y la biología del envejecimiento
1Laboratory of Molecular Biology, National Heart, Lung, and Blood Institute/National Institutes of Health, Bethesda, Maryland 20892-1622, USA. finkelt@nih.gov
Nature
|November 23, 2000
Resumen
Los organismos evolucionaron para manejar las especies reactivas de oxígeno (ROS) para la supervivencia en ambientes ricos en oxígeno. La producción de ROS y las respuestas celulares al estrés oxidativo están relacionadas con el envejecimiento y la esperanza de vida.
Área de la Ciencia:
- La bioquímica es la bioquímica.
- Biología celular Biología celular.
- Gerontología Gerontología.
Sus antecedentes:
- La vida en un ambiente oxigenado requiere mecanismos de defensa celular.
- Las especies reactivas de oxígeno (ROS) son subproductos del metabolismo del oxígeno.
- Comprender la ROS es crucial para estudiar el envejecimiento y la esperanza de vida.
Objetivo del estudio:
- Revisar el vínculo entre las especies reactivas de oxígeno y el envejecimiento.
- Explorar el papel de las respuestas al estrés oxidativo celular en la determinación de la esperanza de vida.
Principales métodos:
- Revisión de la literatura de las estrategias celulares para la desintoxicación de los ROS.
- Análisis de la evidencia que conecta la producción de oxidantes con el envejecimiento.
- Examen de las respuestas del organismo al estrés oxidativo.
Principales resultados:
- Los mecanismos celulares para detectar y desintoxicar los ROS han evolucionado.
- Tanto la producción apropiada como la inapropiada de ROS influyen en el envejecimiento.
- Las respuestas del organismo al estrés oxidativo son factores clave en la esperanza de vida.
Conclusiones:
- El estrés oxidativo y la gestión de los ROS son fundamentales para los procesos de envejecimiento.
- El equilibrio entre la producción de ROS y la desintoxicación afecta la vida útil.
- La defensa celular contra el estrés oxidativo es fundamental para la longevidad.
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