Crown Procyanidin Tetramer: A Procyanidin with an Unusual Cyclic Skeleton with a Potent Protective Effect against Amyloid-ß-Induced Toxicity.
Molecules
; 24(10)2019 May 18.
Article
en En
| MEDLINE
| ID: mdl-31109031
ABSTRACT
The structure of a new procyanidin tetramer, which we call a crown procyanidin tetramer, with an unprecedented macrocyclic structure has been characterized for the first time. Its comprehensive spectroscopic analysis revealed that it is a symmetric procyanidin tetramer composed of four (-)-epicatechin sub-units linked alternatively via 4ßâ8 or 4ßâ6 B-type interflavanyl linkages to form the macrocyclic structure. This NMR-characterized carbon skeleton has never been reported before for procyanidins in grape or in wine, neither in the plant kingdom. Surprisingly, the crown procyanidin tetramer appeared to be specifically localized in grape skin, contrasting with the oligomeric and polymeric procyanidins present in seed, skin, and bunch stem. Moreover, this crown procyanidin tetramer showed promising protective effects against amyloid-ß induced toxicity.
Palabras clave
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Catequina
/
Biflavonoides
/
Proantocianidinas
/
Multimerización de Proteína
Límite:
Animals
Idioma:
En
Revista:
Molecules
Asunto de la revista:
BIOLOGIA
Año:
2019
Tipo del documento:
Article
País de afiliación:
Francia