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Published on: April 13, 2018
Bronceado no enzimático in vivo: posible proceso de envejecimiento de proteínas de larga vida
Resumen
La reacción de Maillard, o pardeamiento no enzimático, hace que las proteínas de la lente formen pigmentos y enlaces cruzados similares al envejecimiento y las cataratas. Este proceso afecta a las proteínas de larga vida como las cristalinas y el colágeno.
Área de la Ciencia:
- La bioquímica es la bioquímica.
- Oftalmología Oftalmología.
- Química de los alimentos Química de los alimentos
Sus antecedentes:
- El pardeamiento no enzimático, también conocido como reacción de Maillard, implica la condensación de azúcares reductores con proteínas.
- Este proceso forma pigmentos amarillos fluorescentes y productos reticulados, imitando los cambios observados en el envejecimiento y las lentes humanas catárctas.
- Si bien es común en los alimentos almacenados, también afecta a las proteínas de larga duración en los sistemas biológicos.
Objetivo del estudio:
- Para investigar la formación de pigmentos y enlaces cruzados en las proteínas de las lentes debido a la reacción de Maillard.
- Comprender las implicaciones del pardeamiento no enzimático para los procesos de envejecimiento en proteínas como las cristalinas de los lentes y el colágeno de la piel.
Principales métodos:
- Incubación de las proteínas de la lente con azúcares reductores.
- Observación y caracterización del pigmento y la formación de enlaces cruzados.
Principales resultados:
- La incubación condujo a la formación de pigmentos amarillos fluorescentes.
- Se observaron productos reticulados, similares a los de las lentes envejecidas y con cataratas.
- El estudio pone de relieve la vulnerabilidad de las proteínas de larga vida al pardeamiento no enzimático.
Conclusiones:
- La reacción de Maillard es un factor significativo en el envejecimiento de proteínas de larga vida, como las cristalinas de los lentes y el colágeno de la piel.
- Comprender este proceso es crucial para la investigación sobre el envejecimiento y las enfermedades relacionadas con el envejecimiento como las cataratas.
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