摘要:
Disclosed are hydrogel compositions formed by the mixture of a tetramethylmethane substituted with one or more polyethylene glycols, and wherein each polyethylene glycol substituent is independently further substituted with one or more electrophilic groups, and a tetramethylmethane substituted with one or more polyethylene glycols, and wherein each polyethylene glycol substituent is independently further substituted with one or more nucleophilic groups. Disclosed are also methods of preparing the above hydrogels. The hydrogel compositions can further comprise pharmaceuticals, such as analgesics or local anesthetics. Disclosed are also methods of sealing a wound, preventing post-surgical adhesion, and reducing post-surgical pain using the disclosed hydrogels.
摘要:
Disclosed herein are heteromeric molecules comprising two or more different pathogen associated molecular patterns (PAMPs), wherein the two or more PAMPs are linked together with discrete, linear inter-PAMP spacing. Also disclosed are immunogenic compositions comprising the heteromeric molecules and related methods of stimulating an immune response in vivo in a subject or ex vivo comprising administering the immunogenic composition to cells. Also disclosed is a method of synthesizing an immunostimulant comprising: identifying 2 or more different PAMPS, covalently linking the 2 or more different PAMPS together, varying spacing between the 2 or more different PAMPs, and testing the effect of spacing between the 2 or more different PAMPS to identify an optimal spacing that results in immune stimulation.
摘要:
Sliceable bone repair material is a porous block-shaped scaffold containing a hydrogel, wherein the hydrogel is formed by Michael type addition of at least two precursor molecules. Said scaffold is made of a synthetic ceramic material and has interconnected macropores having a diameter above 100 μm. In addition said scaffold has a total porosity of 80 to 95%. The total volume of the hydrogel is smaller than the total volume of the interconnected macropores.
摘要:
Multifunctional compounds are provided that readily crosslink in situ to provide crosslinked biomaterials. The multifunctional compounds contain a single component having at least three reactive functional groups thereon, with the functional groups selected so as to be non-reactive in an initial environment and inter-reactive in a modified environment. Reaction of a plurality of the multifunctional compounds results in a three-dimensional crosslinked matrix. In one embodiment, a first functional group is nucleophilic, a second functional group is electrophilic, and at least one additional functional group is nucleophilic or electrophilic. Methods for preparing and using the multifunctional compounds, and kits including the multifunctional compounds are also provided. Exemplary uses for the multifunctional compounds include tissue augmentation, biologically active agent delivery, bioadhesion, and prevention of adhesions following surgery or injury.
摘要:
The present invention provides both crosslinked polymer compositions capable of forming hydrogel upon exposure to an aqueous environment and thiosulfonate hydrogel-forming components. The thiosulfonate hydrogel-forming components of the invention are preferably multi-arm thiosulfonate polymer derivatives that form a crosslinked polymer composition when exposed to a base without requiring the presence of a second cross-linking reagent, redox catalyst, or radiation. Methods for forming hydrogel compositions, as well as methods for using the hydrogel, are also provided.
摘要:
A method for encapsulating biologics within a hydrogel by using an aqueous solution of an isocyanate-functional polyurethane prepolymer which is mixed with an amount of biologics and an aqueous solution containing a dithiol crosslinking agent under physiological pH conditions to create a hydrogel. An additional bidentate crosslinking agent is optionally included. The product of such method may be a bioreactor or an assay device having a plurality of different biologics encapsulated at predetermined locations in a substrate.
摘要:
The present invention provides both crosslinked polymer compositions capable of forming hydrogels upon exposure to an aqueous environment and thiosulfonate hydrogel-forming components. The thiosulfonate hydrogel-forming components of the invention are preferably multi-arm thiosulfonate polymer derivatives that form a crosslinked polymer composition when exposed to a base without requiring the presence of a second cross-linking reagent, redox catalyst, or radiation. Methods for forming hydrogel compositions, as well as methods for using the hydrogels, are also provided.