摘要:
The present invention provides biodegradable polymer particle delivery compositions based on polymers, such as polyester amide (PEA) and polyester urethane (PEUR) polymers, that contain amino acids in the polymer. The polymer particle delivery compositions can be formulated as a liquid dispersion of polymer particles with the bioactive agents dispersed in the particle or conjugated attached to polymer molecules or particle surfaces. The bioactive agents can include drugs, polypeptides, DNA and cells for cell-based therapies using particles sized for local, mucosal or circulatory delivery. Methods of treating a disease by administering to a subject the polymer particle delivery composition, which incorporates a bioactive agent suitable for treatment of the disease, or its symptoms, are also included.
摘要:
The present application is directed to biodegradable polymers, compositions, including microspheres and nanospheres, formed of such polymers, and methods of using such polymers and compositions. In certain embodiments, the subject polymer compositions include therapeutic agents, optionally providing sustained release of the encapsulated agent after administration to a patient.
摘要:
Polymers comprising a polyethylenimine, a biodegradable group, and a relatively hydrophobic group are useful for the delivery of bioactive agents to cells.
摘要:
Complexes are disclosed which are a combination of a polynucleotide and a biodegradable polyacetal-peptide. The disclosed complexes are useful for cell transfection.
摘要:
A composition, or article for inhibition of bone growth and resorption comprises an anti-inflammatory agent(s), optionally other agents and carriers, monomer(s), oligomer(s), polymer(s), salt(s), mixtures(s), dispersion(s) and/or blend(s) thereof, which composition, device, or implant upon polymer erosion releases a bone growth and/or bone resorption retarding, reducing or inhibiting amount of the agent(s). The monomers, oligomers and polymers, releasing active or activatable agent(s), have preselected properties such as molecular weight, flexibility, hardness, adhesiveness, and other valuable properties. The monomers, oligomers and polymers may be prepared by a process involving various alternative and sequential steps that allow the design a priori of products with specific characteristics. The composition, device, implant or dressing of this patent are suitable for retarding, reducing or inhibiting bone growth or bone resorption, comprising administering or applying to a subject's pre-selected site a bone growth or resorption reducing amount of the agent(s).
摘要:
The present invention relates to a conjugate that includes a nucleic acid ligand bound to a controlled release polymer system, a pharmaceutical composition that contains the conjugate, and methods of treatment using the conjugate. The controlled release polymer system includes an agent such as a therapeutic, diagnostic, prognostic, or prophylactic agent. The nucleic acid ligand that is bound to the controlled release polymer system, binds selectively to a target, such as a cell surface antigen, and thereby delivers the controlled release polymer system to the target.
摘要:
Provided herein are water-soluble prodrugs. The prodrugs of the invention comprise a water-soluble polymer having three or more arms, at least three of which are covalently attached to an active agent, e.g., a small molecule. The conjugates of the invention provided an optimal balance of polymer size and structure for achieving improved drug loading, since the conjugates of the invention possess three or more active agents releasably attached to a multi-armed water soluble polymer. The prodrugs of the invention are therapeutically effective, and exhibit improved properties in-vivo when compared to unmodified parent drug.
摘要:
The present invention provides curable materials, medical devices incorporating such materials, wherein the curable materials are capable of releasing hydrolyzable leaving agents upon hydrolysis that can form agents (e.g., pharmaceutically active agents), and methods of making and using such materials and devices.
摘要:
A polymer comprising recurring units represented by formula (I); wherein X is selected from the group consisting of C(O)OR 1 , C(O)SR 1 , C(O)NR 1 R 2 , and VZ, where R 1 and R 2 are each individually selected from the group consisting of hydrogen, C 1 to C 10 alkyl, and C 6 to C 10 aryl, where V is a labile linker group, and where Z is selected from the group consisting of poly(ethyleneimine), poly(propyleneimine), poly(lysine), PAMAM dendrimer, octaamine dendrimer, and hexadecaamine dendrimer; and wherein Y is selected from the group consisting of -(CH 2 ) 2 -, -(CH 2 ) 2 -O-(CH 2 ) 2 -, -(CH 2 ) 2 -O-(CH 2 ) 2 -O-(CH 2 ) 2 -, and -(CH 2 ) 3 -NHC(O)-(CH 2 ) 6 -C(O)NH-(CH 2 ) 3 - is useful in nucleic acid delivery applications. Polyacetals of the formula (I) are preferably made by reacting appropriate diols and divinyl ethers. In preferred embodiments, complexes formed between polyacetals of the formula (I) and polynucleotides are useful as transfection reagents.
摘要:
The present invention relates to the delivery of drug, peptide and protein pharmaceuticals using a biotin-mediated uptake system. More particularly the invention relates to the amplification of active substance delivery with the biotin uptake system using a biotin-active substance-polymer conjugate or a biotin-nanoparticle conjugate. The invention also relates to processes for preparing the conjugates, pharmaceutical and diagnostic compositions containing same and methods of diagnosis and treatment involving the conjugates.