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Nanopartículas azules prusianas sintetizadas catalíticamente que derrotan a la enzima peroxidasa natural

Maria A Komkova¹, Elena E Karyakina¹, Arkady A Karyakin¹

¹Chemistry faculty of M.V. Lomonosov Moscow State University , 119991 , Moscow , Russia.

Journal of the American Chemical Society

|August 18, 2018

Resumen

Desarrollamos nanopartículas Prussian Blue (PB) que imitan las enzimas peroxidasa. Estas nanoenzimas muestran una actividad catalítica y especificidad significativamente mejoradas, ofreciendo una alternativa rentable para la biotecnología y las aplicaciones analíticas.

Área de la Ciencia:

Nanotecnología
La bioquímica
Ciencias de los materiales

Sus antecedentes:

Las enzimas peroxidasa son cruciales en la biotecnología y el diagnóstico, pero pueden ser costosas e inestables.
El desarrollo de enzimas artificiales de alta actividad y especificidad es un área clave de investigación.
Las nanopartículas Prussian Blue (PB) ofrecen una alternativa potencial de bajo costo y estable a las enzimas naturales.

Objetivo del estudio:

Para sintetizar las nanopartículas de azul prusiano (PB) a través de la reacción catalítica.
Investigar la actividad catalítica dependiente del tamaño de las nanopartículas de PB en la reducción de peróxido de hidrógeno (H2O2).
Evaluar las propiedades enzimáticas y las aplicaciones potenciales de las nanopartículas de PB como imitadores de la peroxidasa.

Principales métodos:

Las nanopartículas de PB se sintetizaron mediante una reacción catalítica que involucró la activación de peróxido de hidrógeno (H2O2).
Se midieron las constantes de velocidad catalítica dependientes del tamaño de las nanopartículas de PB.
Se evaluó la especificidad enzimática (actividad de la peroxidasa frente a la oxidasa) y el rendimiento en soluciones fisiológicas.

Principales resultados:

Las nanopartículas de PB se sintetizaron con éxito con tasas catalíticas dependientes del tamaño para la reducción de H2O2.
La actividad catalítica excedió significativamente a la peroxidasa natural, con números de rotación 300 veces más altos para 200 nm y 4 órdenes de magnitud más altos para nanopartículas PB de 570 nm.
Las nanopartículas de PB sintetizadas exhibieron verdaderas propiedades enzimáticas, incluida la especificidad y la operabilidad en condiciones fisiológicas, superando a otras nanoenzimas.

Conclusiones:

Las nanopartículas PB sintetizadas catalíticamente demuestran una actividad y especificidad ultra altas, imitando las peroxidasas naturales.
Su estabilidad, bajo costo y naturaleza libre de metales nobles los convierten en sustitutos ideales de las peroxidasas naturales y recombinantes.
Estas nanopartículas PB son muy prometedoras para aplicaciones en biotecnología y ciencias analíticas.

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