Reversibly cross-linked hydrogels

   
   

A hydrogel composition and methods of preparing and using the same are disclosed. The hydrogel composition comprises an oxidized polysaccharide, and a cross-linker having at least two functional cross-linking groups. The cross-linker reversibly cross-links the polysaccharide and is provided in an amount to provide dangling cross-linkers. The method of preparing a hydrogel comprises the steps of providing an oxidized polysaccharide, and providing a cross-linker having at least two functional cross-linking groups. The cross-linker is mixed with the polysaccharide at a concentration of the cross-linker sufficient to form a hydrogel wherein the cross-linker reversibly cross-links the polysaccharide and has dangling cross-linkers. The hydrogels are useful, for example, for tissue engineering, cell transplantation and drug delivery applications.

Uma composição do hydrogel e os métodos de preparar e de usar o mesmo são divulgados. A composição do hydrogel compreende um polysaccharide oxidado, e um cross-linker que tem ao menos dois grupos funcionais do cross-linking. O cross-linker cross-links reversìvel o polysaccharide e é fornecido em uma quantidade para fornecer cross-linkers dangling. O método de preparar um hydrogel compreende as etapas de fornecer um polysaccharide oxidado, e de fornecer um cross-linker que tem ao menos dois grupos funcionais do cross-linking. O cross-linker é misturado com o polysaccharide em uma concentração do cross-linker suficiente dar forma a um hydrogel wherein o cross-linker cross-links reversìvel o polysaccharide e tem cross-linkers dangling. Os hydrogels são úteis, para o exemplo, para a engenharia do tecido, o transplantation da pilha e as aplicações da entrega da droga.

 
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