Abstract: Bioactive agents are embedded in a cross-linked dextran and coated with a bioresorbable polymer. When implanted in a mammal, the coated cross-linked dextran composition produces controlled release of the embedded bioactive agent.

Abstract: Bioactive agents are embedded in a cross-linked dextran and coated with a bioresorbable polymer. When implanted in a mammal, the coated cross-linked dextran composition produces controlled release of the embedded bioactive agent.

Abstract: Bioactive agents are delivered to a body site in need of the same by providing a first aliquot portion of a reaction mixture which includes an aldehydic polymer solution, and a second aliquot portion of a reaction which includes a cross-linking hydrazide and a bioactive agent. The first and second aliquot portions may be mixed (e.g., by expelling such portions from respective syringe barrels) to form the reaction mixture thereof. The thus formed reaction mixture may then be installed at the body site whereby the reaction mixture is allowed to solidify in situ within about 1 to 10 minutes into a reaction product comprised of a hydrazide cross-linked oxidized aldehydic polymer matrix with the bioactive agent entrapped therein.

Abstract: Bioactive agents are delivered to a body site in need of the same by providing a first aliquot portion of a reaction mixture which includes an aldehydic polymer solution, and a second aliquot portion of a reaction which includes a cross-linking hydrazide and a bioactive agent. The first and second aliquot portions may be mixed (e.g., by expelling such portions from respective syringe barrels) to form the reaction mixture thereof. The thus formed reaction mixture may then be installed at the body site whereby the reaction mixture is allowed to solidify in situ within about 1 to 10 minutes into a reaction product comprised of a hydrazide cross-linked oxidized aldehydic polymer matrix with the bioactive agent entrapped therein.

Abstract: A kit for forming a bioerodible composition is provided with a first aliquot portion of a reaction mixture having an aldehydic polymer solution, and a second aliquot portion of a reaction mixture having solids which include a cross-linking hydrazide. When mixed, the first and second aliquot portions of the reaction mixture react at a pH of 4 to 6 to form a solidified bioerodible composition within about 1 to about 10 minutes, to form a hydrazide cross-linked aldehydic polymer matrix. The bioerodable composition may be usefully employed to seal and/or treat wounds (e.g., a surgical incision).

Abstract: Bioactive agents are embedded in a cross-linked dextran and coated with a bioresorbable polymer. When implanted in a mammal, the coated cross-linked dextran composition produces controlled release of the embedded bioactive agent.

Abstract: A kit for forming a bioerodible composition is provided with a first aliquot portion of a reaction mixture having an aldehydic polymer solution, and a second aliquot portion of a reaction mixture having solids which include a cross-linking hydrazide. When mixed, the first and second aliquot portions of the reaction mixture react at a pH of 4 to 6 to form a solidified bioerodible composition within about 1 to about 10 minutes, to form a hydrazide cross-linked aldehydic polymer matrix. The bioerodable composition may be usefully employed to seal and/or treat wounds (e.g., a surgical incision).

Abstract: A bioerodible composition for delivery of a bioactive agent is the reaction product of a reaction mixture which includes an oxidized dextran solution, and a mixture of solids containing a dihydrazide, a bioactive agent, and optionally a pH adjusting agent in an amount sufficient to achieve a pH of the reaction mixture of 6 or less. The composition may include a release agent for the controlled release of the bioactive agent from the composition. The composition may be administered to a body site in need of the same by providing a first aliquot portion of a reaction mixture which includes the reactants and a bioactive agent. A kit which includes a double syringe respectively containing the first and second aliquot portions of the reaction mixture may be provided so that the same may be mixed just prior to use.

Abstract: A bioerodible composition for delivery of a bioactive agent is the reaction product of a reaction mixture which includes an oxidized dextran solution, and a mixture of solids containing a dihydrazide, a bioactive agent, and optionally a pH adjusting agent in an amount sufficient to achieve a pH of the reaction mixture of 6 or less. The composition may include a release agent for the controlled release of the bioactive agent from the composition.

Abstract: A bioerodible composition for delivery of a bioactive agent is the reaction product of a reaction mixture which includes an oxidized dextran solution, and a mixture of solids containing a dihydrazide, a bioactive agent, and optionally a pH adjusting agent in an amount sufficient to achieve a pH of the reaction mixture of 6 or less. The composition may include a release agent for controlled release of the bioactive agent from the composition.

Abstract: This invention comprises a method of immunization in which human chorionic gonadotropin (hCG) vaccine antigens are incorporated into an inorganic salt/biopolymer complex using a simple manufacturing process. The resulting solid matrix is administered to human subjects in the form of microparticles. The method comprises suspending microparticles in an emulsion of a natural oil and water containing an adjuvant compound acceptable for human use and injecting a pharmaceutical dose of the suspension intramuscularly. The vaccine antigens are conjugates of peptide fragments of the beta subunit of hCG with a carrier protein, diphtheria toxoid. Vaccine antigens delivered in this formulation are effective for eliciting antibodies in recipients for the treatment of cancer or hormone-related diseases.

Abstract: This invention relates generally to the production and use of inorganic-polymer complexes for the controlled release of compounds including medicinals. Advantageously, the inorganic used is calcium sulfate.

Abstract: The production and use of inorganic-polymer complexes for the controlled release of compounds including medicinals are disclosed. Advantageously, the inorganic used is calcium sulfate.

Abstract: This invention relates generally to the production and use of inorganic-polymer complexes for the controlled release of compounds including medicinals. Advantageously, the inorganic used is calcium sulfate.

Abstract: This invention relates generally to the production and use of inorganic-polymer complexes for the controlled release of compounds including medicinals. Advantageously, the inorganic used is calcium sulfate.

Abstract: This invention relates generally to the production and use of inorganic-conditioning agent complexes for the controlled release of compounds including medicinals. Advantageously, the inorganic used is calcium sulfate and the conditioning agent is calcium stearate.

Abstract: This invention relates generally to the production and use of inorganic-polymer complexes for the controlled release of compounds including medicinals. The inorganic compound used is advantageously calcium sulfate-hemihydrate. The invention includes a composition for the controlled release of an active agent comprising: a) a hydrated or crystallized inorganic compound, and b) a matrix polymer which slows the release of the active agent, wherein the composition is a solid matrix due to the hydration or crystallization of the inorganic compound. Further included is a composition for the controlled release of an active agent comprising: a) a hydrated or crystallized inorganic compound, and b) a complexing agent which forms a salt or conjugate with the active agent, wherein the composition is a solid matrix due to the hydration or crystallization of the inorganic compound.

Abstract: Methods, apparatus and compositions are presented for ligating ligands together which bind to a common receptor. One embodiment includes polynucleotide probes having photoreactive functional groups. The probes are capable of assuming substantially contiguous reactive positions on a target polynucleotide placing the photoreactive group in juxtaposition. Activation of the photoreactive functional groups with radiant energy form a probe reaction product in which the probes are bound to each other.

Abstract: A bioerodible matrix for the controlled release of medicinals including protein therapeutics is disclosed. A method for controlled drug release is also disclosed.

Abstract: A method for the detection of a target polynucleotide sequence wherein the target polynucleotide sequence is used as a template to direct hybridization of first and second polynucleotide probes to contiguous portions of the target. The hybridized probes are then ligated, preferably by covalent linkage of photoreactive functional groups present on each of the probes, to produce a ligated reaction product. The ligated reaction product is then multiplied with a polymerase such as Q-beta replicase to produce an enzyme reaction product which is then detected. The presence of the enzyme reaction product is indicative of the presence of the target polynucleotide sequence.