Injectable oligomer-cross-linked gelatine hydrogels via anhydride-amine-conjugation.
J Mater Chem B
; 9(9): 2295-2307, 2021 03 11.
Article
em En
| MEDLINE
| ID: mdl-33616150
ABSTRACT
Injectable gelatine-based hydrogels are valuable tools for drug and cell delivery due to their extracellular matrix-like properties that can be adjusted by the degree of cross-linking. We have established anhydride-containing oligomers for the cross-linking of gelatine via anhydride-amine-conjugation. So far, this conversion required conditions not compatible with cell encapsulation or in vivo injection. In order to overcome this limitation, we developed an array of quarter-oligomers varying in comonomer composition and contents of reactive anhydride units reactive towards amine groups under physiological conditions. The oligomers were of low molecular weight (Mn < 5 kDa) with a high degree of chemically intact anhydrides. Chemical comonomer composition was determined by 1H-NMR. Dissolutions experiments confirmed improved hydrophilicity of the synthesized oligomers over our established compositions. Injectable formulations are described utilizing cytocompatible concentrations of constituent materials and proton-scavenging base. Degree of cross-linking and stiffness of injectable hydrogels were controlled by composition. The gels hold promise as injectable drug or cell carrier and as bioink.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Portadores de Fármacos
/
Hidrogéis
/
Polimerização
/
Aminas
/
Gelatina
/
Anidridos
Idioma:
En
Revista:
J Mater Chem B
Ano de publicação:
2021
Tipo de documento:
Article