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Ajuste del perfil de actividad biológica de los polímeros antibacterianos a través del patrón de sustitución de

Runhui Liu¹, Xinyu Chen, Saswata Chakraborty

¹Department of Chemistry, ‡Department of Biomedical Engineering, #Department of Medical Microbiology and Immunology, and §Department of Medicine, University of Wisconsin , Madison, Wisconsin 53706, United States.

Journal of the American Chemical Society

|March 8, 2014

Resumen

Los nuevos copolímeros de nylon-3 con variadas subunidades hidrofóbicas muestran una potente actividad antibacteriana y una alta selectividad. La unidad óptima α,α,β,β-tetrametil ofrece una estrategia prometedora para el desarrollo de polímeros sintéticos para aplicaciones biológicas.

Área de la Ciencia:

Química de Polímeros La Química de Polímeros es la química de los polímeros.
Ciencia de los Biomateriales Ciencia de los Biomateriales.
Agentes antimicrobianos Agentes antimicrobianos Agentes antimicrobianos Agentes antimicrobianos Agentes antimicrobianos Agentes antimicrobianos Agentes antimicrobianos Agentes antimicrobianos

Sus antecedentes:

Los copolímeros binarios de nylon-3 pueden imitar los péptidos de defensa del huésped.
Comprender las relaciones estructura-actividad de estos polímeros sintéticos es crucial para su aplicación.
Investigaciones anteriores se centraron en subunidades hidrofóbicas derivadas de cicloalcanos, con ciclohexilo mostrando una promesa.

Objetivo del estudio:

Para evaluar subunidades hidrofóbicas alternativas isoméricas o casi isoméricas al ciclohexilo en copolímeros binarios de nylon-3.
Investigar el impacto de la estructura variable de las subunidades hidrofóbicas en la actividad antibacteriana y hemolítica.
Explorar el potencial para desarrollar nuevos polímeros sintéticos con propiedades biológicas mejoradas.

Principales métodos:

Síntesis de copolímeros binarios de nylon-3 con diferentes subunidades hidrofóbicas.
Evaluación de la actividad antibacteriana contra las células procariotas.
Evaluación de la actividad hemolítica contra las células eucariotas (glóbulos rojos).
Análisis de las relaciones estructura-actividad basadas en la composición de las subunidades y las propiedades conformacionales.

Principales resultados:

Las variaciones en la sustitución de subunidades hidrofóbicas llevaron a cambios menores en la actividad antibacteriana, pero alteraciones significativas en la actividad hemolítica.
La subunidad hidrofóbica α,α,β,β-tetrametil demostró un rendimiento óptimo, produciendo copolímeros con potentes efectos antibacterianos y alta selectividad de procariotas frente a eucariotas.
Las bacterias no desarrollaron fácilmente resistencia a los copolímeros de nylon-3 recién desarrollados.

Conclusiones:

Las propensiones conformacionales de las subunidades hidrofóbicas influyen significativamente en el perfil de actividad biológica de los copolímeros binarios de nylon-3.
Los copolímeros de nylon-3 sustituidos por α,α,β,β-tetrametil ofrecen una plataforma prometedora para el desarrollo de agentes antibacterianos selectivos.
La adaptación de las propiedades conformacionales de las subunidades es una estrategia valiosa para diseñar polímeros sintéticos para diversas aplicaciones biológicas.

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