摘要:
phEPO/ABP polyplexes and methods for the use thereof are disclosed and described. In one embodiment, a phEPO/ABP polyplex may be administered to a subject in a therapeutically effective amount to treat or prevent a cardiac condition. Administration may 5 be made, in some aspects, by intramyocardial injection of a composition or solution containing the phEPO/ABP polyplex.
摘要:
A system and method for the parenteral delivery of a drug in a biodegradable polymeric matrix to a warm blooded animal as an aqueous liquid with the resultant formation of a hydrogel depot for the controlled release of the drug. The system comprises an injectable biodegradable block copolymeric drug delivery liquid having thermal gelation properties. The copolymer has a gel/sol transition temperature such that, above the body temperature of the animal to which it is administered, it is a solution and when administered and cooled to body temperature it forms a hydrogel. The copolymer is made up of (i) a hydrophobic A polymer block of poly (α-hydroxy acid) and (ii) a hydrophilic B polymer block comprising a poly(ethylene oxide). The drug is released at a controlled rate from the copolymer which biodegrades into non-toxic products. The gel/sol transition temperature and degradation rate can be adjusted by proper selection of the molecular weight and concentration of the poly (α-hydroxy acid) and poly(ethylene oxide) polymer block components.
摘要:
A composition for delivery of a selected nucleic acid into a targeted host cell comprises a complex of a hydrophobized, positively charged, biocompatible polymer; a lipoprotein; and a selected nucleic acid. Hydrophobic and electrostatic interactions between the components provide for the formation of the condensed DNA-containing complex. Preferred embodiments of the complex have a slightly positive surface charge and an average diameter of about 200 nm. Plasmids and oligonucleotides can be efficiently delivered with such compositions. A method of delivering a selected nucleic acid to a host cell is also disclosed.
摘要:
A method for delaying onset of insulin dependent diabetes mellitus (IDDM) in an individual predisposed to developing the disease is disclosed. The method comprises administering a composition comprising an immunologically effective monoclonal antibody or fragment thereof against glutamic acid decarboxylase (GAD) coupled to a nonimmunogenic hydrophilic polymer that provides a hydration shell around the monoclonal antibody for inhibiting immune recognition thereof. Poly(ethylene glycol) is a preferred polymer. A method of reducing insulitis in an IDDM patient and a composition therefor are also described.
摘要:
Improved poly(amido ethylenimine) copolymers for gene delivery are disclosed. One illustrative embodiment includes polyethylene glycol (PEG) covalently bonded to a branched poly (triethyenetetramine/cystamine bisacrylamide) copolymer (poly (TETA/CBA) ). The polyethylene glycol can be linear or branched. Another illustrative embodiment includes an RGD peptide covalently bonded to the poly (TETA/CBA) -PEG conjugate. Still another illustrative embodiment includes a method of using these compositions for transfecting a cell with a nucleic acid.
摘要:
Plasmids useful for treating ischemic disease, such as ischemic heart disease, are described. The plasmids express vascular endothelial growth factor (VEGF) under the control of a promoter (RTP801) that is up-regulated under hypoxic conditions. Pharmaceutical compositions for treating ischemic disease include mixtures of the hypoxia-regulated VEGF plasmids and pharmaceutically acceptable carriers. Methods for treating ischemic disease include administering such pharmaceutical compositions to a person in need of such treatment.