Macromolecular Rapid Communications
Macromolecular Rapid Communications
3 years ago

Stimuli-Responsive Dipeptide–Protein Hydrogels through Schiff Base Coassembly

Stimuli-Responsive Dipeptide–Protein Hydrogels through Schiff Base Coassembly
Junbai Li, Tingting Yuan, Jinbo Fei, Xiaoke Yang, Youqian Xu
Different from the conventional irreversible covalent conjugations, a simple and efficient dynamic Schiff base covalent assembly is developed to construct the stable and smart dipeptide–protein hydrogels under mild conditions. Diphenylalanine–hemoglobin hydrogel is chosen to investigate the gelation formation process and mechanism. It is found that such assembled dipeptide–protein hydrogels are sensitive to pH variation, and simultaneously the proteins can be released without changing the native secondary structures from the gels. Furthermore, these adaptive hydrogels can encapsulate a series of small molecules, multicomponent proteins, and functional nanoparticles. These versatile hydrogels may find a great potential in bioapplications. Through one-pot-, three-component-, dynamic covalent assembly, a series of stable and stimuli-response dipeptide–protein Schiff base hydrogels are constructed. Such assembled hydrogels exhibit adaptive incorporation of various small molecules, proteins, and nanoparticles and show bidirectional pH-triggered guest release due to the coexistence of acid-cleavable Schiff base covalent bonding and base-cleavable hydrogen bonding.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/marc.201700408

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