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La taurina aumenta la absorción celular de pequeños péptidos D para el autoensamblaje molecular intracelular

Jie Zhou¹, Xuewen Du¹, Jie Li¹

¹Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02453, United States.

Journal of the American Chemical Society

|August 4, 2015

Resumen

La conjugación de taurina aumenta la absorción celular del péptido D más de 10 veces en las células de mamíferos. Esta estrategia permite el autoensamblaje intracelular, mejorando la acumulación y ofreciendo nuevas aplicaciones biomédicas para los péptidos D.

Área de la Ciencia:

La bioquímica
Biología molecular
Ingeniería biomédica

Sus antecedentes:

Los péptidos D ofrecen biostabilidad para usos biomédicos, pero presentan una escasa absorción celular debido a la resistencia proteolítica y la falta de interacción con el transportador.
La mejora de la entrada celular del péptido D es crucial para su aplicación efectiva en terapias intracelulares.

Objetivo del estudio:

Investigar el efecto de la conjugación de taurina en la absorción celular y la acumulación intracelular del péptido D.
Para aclarar el mecanismo subyacente a la entrada celular de péptido D mejorado con taurina.
Explorar el potencial de los péptidos D conjugados con taurina para el autoensamblaje molecular intracelular.

Principales métodos:

Conjugación de taurina con pequeños péptidos D.
Cuantificación de la absorción celular utilizando diversas concentraciones de péptidos D conjugados y no conjugados en células de mamíferos.
Estudios sobre el mecanismo de la endocitosis dependiente de la dinamina y los inhibidores de la macropinocitosis.
Análisis de la actividad de la esterasa intracelular y del autoensamblaje de los derivados del péptido D.

Principales resultados:

La conjugación de taurina aumentó la absorción celular del péptido D en más de 10 veces (de 118 μM a > 1,6 mM).
Los conjugados de taurina-D-péptido se someten a un autoensamblaje desencadenado por la esterasa intracelular, mejorando la acumulación celular.
La entrada celular se produce a través de la endocitosis dependiente de dinamina y la macropinocitosis, independientemente de los transportadores de taurina.

Conclusiones:

La conjugación de taurina es una estrategia potente para mejorar significativamente la absorción celular del péptido D y la acumulación intracelular.
El motivo de taurina escindible por la enzima facilita el autoensamblaje intracelular, ofreciendo nuevas posibilidades terapéuticas.
Este enfoque proporciona un método biocompatible y estable para mejorar la entrega de moléculas bioactivas para aplicaciones intracelulares.

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