This disclosure provides novel hydrogels that can undergo multiple gel-sol transitions and methods of making and using such hydrogels, particularly in anastomosis procedures. The peptide hydrogels comprising a fibrillar network of peptides that are in an amphiphilic β-hairpin conformation. The peptides comprise photo-caged glutamate residues with a neutral photocage that can be photolytically selectively uncaged to disrupt the fibrillar network and trigger an irreversible gel- sol phase transition of the hydrogel. Isolated peptides for making the disclosed hydrogels are provided, as are methods of using the peptide hydrogels in anastomosis procedures.
本公开提供了一种新型的
水凝胶,可以经历多次凝胶-溶胶转变,并提供制备和使用这种
水凝胶的方法,特别是在吻合手术中的应用。这些肽
水凝胶包括呈两性亲脂性β-发夹构象的肽纤维网络。这些肽包括带有中性光遮蔽基的谷
氨酸残基,可以通过光解选择性地解除遮蔽,破坏肽纤维网络并触发
水凝胶的不可逆凝胶-溶胶相转变。提供了用于制备所述
水凝胶的孤立肽,以及在吻合手术中使用肽
水凝胶的方法。