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Síntesis total de la unidad de repetición de trisacáridos zwitteriónicos congestionados y bifosforilados de
D Jamin Keith1, Steven D Townsend1
1Department of Chemistry , Vanderbilt University , Nashville , Tennessee 37235 , United States.
Journal of the American Chemical Society
|July 23, 2019
Resumen
Los investigadores sintetizaron una nueva unidad de repetición de polisacárido zwitteriónico (ZPS) de Morganella morganii. Este avance permite la creación de nuevos materiales ZPS con propiedades inmunomoduladoras únicas.
Área de la Ciencia:
- Química de los carbohidratos
- Inmunología
- Biología sintética
Sus antecedentes:
- Se sabe que los polisacáridos zwitteriónicos (ZPS) activan las respuestas inmunes dependientes de las células T a través de la presentación de la clase II del CMH.
- La síntesis de estructuras complejas de ZPS es crucial para el desarrollo de nuevos biomateriales con funciones inmunomoduladoras.
Objetivo del estudio:
- Para reportar la primera síntesis de una unidad de repetición de Morganella morganii ZPS.
- Establecer una herramienta sintética versátil para nuevos materiales ZPS.
- Investigar la incorporación de grupos funcionales únicos dentro de la estructura ZPS.
Principales métodos:
- Utilizó un enfoque sintético de tercera generación.
- Desarrolló un nuevo método de glicosilación para un aceptor funcionalizado con fosfoglicerol.
- Sintetizó un donante de fosfocolina muy eficaz para la funcionalización de los oligosacáridos.
Principales resultados:
- Con éxito sintetizado la unidad de repetición Morganella morganii ZPS.
- Incorpora un enlace 1,2-cis-α-glicosídico y un enlace 1,2-trans-galactosídico desafiante (Gal-β-(1 → 3) -GalNAc).
- Logró la coinstalación de residuos de fosfoglicerol y fosfocolina en el mismo oligosacárido por primera vez.
Conclusiones:
- La estrategia sintética desarrollada proporciona una herramienta valiosa para la construcción de ZPS complejas.
- La unidad de repetición sintetizada facilita la creación de nuevos materiales ZPS con aplicaciones potenciales en inmunología.
- Este trabajo amplía el repertorio de estructuras ZPS accesibles y su funcionalidad.
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