摘要:
Covalently modified alginate polymers, possessing enhanced biocompatibility and tailored physiochemical properties, as well as methods of making and use thereof, are disclosed herein. The covalently modified alginates are useful as a matrix for coating of any material where reduced fibrosis is desired, such as encapsulated cells for transplantation and medical devices implanted or used in the body.
摘要:
Products, such as devices, prostheses, and materials, whose surfaces have been chemically modified after formation of the product with a compound having a structure -X-R1, wherein X is oxygen, sulfur or NR2 and R1 and R2 are independently hydrogen or an organic group containing any number of carbon atoms, in order to impart beneficial properties to these products are disclosed. The surface-modified products have improved biocompatibility compared to a corresponding product that lacks the modification. Following implantation in a subject, the surface-modified products induce a lower foreign-body response, compared to a corresponding unmodified product.
摘要翻译:在产品形成后使用具有-XR 1结构的化合物(其中X是氧,硫或NR 2)的化合物对其表面进行化学修饰的产品(例如装置,假体和材料)和 R 1和R 2独立地为氢或含有任何数目碳原子的有机基团,以便赋予这些产品有益的性质。 与缺乏改性的相应产品相比,表面改性产品具有改善的生物相容性。 植入受试者后,与相应的未修饰产品相比,表面改性产品诱发较低的异物反应。 p>
摘要:
Compounds, compositions, and methods for "smart" delivery of a therapeutic, prophylactic or diagnostic agent, such as glucose-mediated delivery of insulin through glucose-sensing insulin derivatives, are provided. The insulin derivatives bind serum albumin or agglomerate in vivo. The insulin derivatives effectively dissociate to release insulin in a hyperglycemic condition, where the complexation of glucose to a glucose-sensing element alters properties of the insulin derivative leading to the dissociation. The compounds, compositions, and methods provide a delivery strategy for both self-regulated and long-term diabetes management.
摘要:
α-Aminoamidine polymers and methods of preparing a-aminoamidine polymers by reacting by reacting one or more amines with one or more isocyanides and one or more aldehydes are described. Methods of preparing a-aminoamidine polymers from commercially available starting materials are also provided, wherein the starting materials are racemic or stereochemically pure. a-Aminoamidine polymers or salt forms thereof are preferably biodegradable and biocompatible and may be used in a variety of drug delivery systems and for other purposes as well such as, for example, coatings, additives, excipients, plastics, and materials, etc. Given the amino moiety of these α-aminoamidine polymers, they are particularly suited for the delivery of polynucleotides. Complexes, micelles, liposomes or particles containing the inventive α-aminoamidine polymers and polynucleotides can be prepared. The inventive α-aminoamidine polymers may also be used in preparing microparticles for drug delivery. They are particularly useful in delivering labile agents given their ability to buffer the pH of their surroundings.
摘要:
Provided herein are lipidoids that may be prepared from the conjugate addition of alkylamines to acrylates. In some embodiments, provided lipidoids are biodegradable and may be used in a variety of drug delivery systems. Given the amino moiety of the lipidoids, they are well-suited for the delivery of polynucleotides, in addition to other agents. Nanoparticles containing the inventive lipidoids and polynucleotides have been prepared and have been shown to be effective in delivering siRNA.
摘要:
Described herein are compounds and compositions that are characterized by the Markush formulae (I), (II), (III), (IV), (V), and (VI) underneath, where at least one terminal amino group is further functionalized by bearing a group of type (i), (ii) or (iii). Such compounds are obtained by reacting the terminal amino group with epoxides or acrylates bearing long chain hydrocarbon groups. The resulting amphiphilic molecules (named "APPLs" in the application) are deemed useful as drug delivery system including nucleotide delivery to cells. Formulae (i), (ii), and (iii) are:
摘要:
Biomedical devices for implantation with decreased pericapsular fibrotic overgrowth are disclosed. The device includes biocompatible materials and has specific characteristics that allow the device to elicit less of a fibrotic reaction after implantation than the same device lacking one or more of these characteristic that are present on the device. Biocompatible hydrogel capsules encapsulating mammalian cells having a diameter of greater than 1 mm, and optionally a cell free core, are disclosed which have reduced fibrotic overgrowth after implantation in a subject. Methods of treating a disease in a subject are also disclosed that involve administering a therapeutically effective amount of the disclosed encapsulated cells to the subject.
摘要:
Biomedical devices for implantation with decreased pericapsular fibrotic overgrowth are disclosed. The device includes biocompatible materials and has specific characteristics that allow the device to elicit less of a fibrotic reaction after implantation than the same device lacking one or more of these characteristic that are present on the device. Biocompatible hydrogel capsules encapsulating mammalian cells having a diameter of greater than 1 mm, and optionally a cell free core, are disclosed which have reduced fibrotic overgrowth after implantation in a subject. Methods of treating a disease in a subject are also disclosed that involve administering a therapeutically effective amount of the disclosed encapsulated cells to the subject.