摘要:
The present invention relates to a method of making a liposome composition. In particular, the invention relates to a method of making liposomes targeted to a specific cell receptor for delivery of a liposome-entrapped drug to the cell. In one embodiment, the process involves the incorporation of lipid-linkers to the surface of pre-formed liposomes, preferably at a higher temperature, followed by the conjugation of one or more temperature-sensitive ligands to the linkers associated with the liposome surface at a lower temperature to avoid deactivation of the temperature sensitive ligands. The present invention also is directed to a product prepared according to the foregoing process, and its use to treat subjects. The present invention is also directed to a kit containing lipid-linker, ligand and pre-formed liposome.
摘要:
Polynucleotide complexes are stabilized by adding a cryoprotectant compound and lyophilizing the resulting formulation. The lyophilized formulations are milled or sieved into a dry powder formulation which may be used to deliver the polynucleotide complex. Delivery of the polynucleotide to a desired cell tissue is accomplished by contacting the tissue with the powder to rehydrate it. In a preferred embodiment, a dry powder formulation is used to transfer genetic information to the cells of the respiratory tract.
摘要:
Liposome formulations for administration of a boronic acid compound are described. The liposomes are comprised of a phospholipid having two acyl chains with between 20-22 carbon atoms in each chain and a boronic acid compound entrapped in the liposomes. In a preferred embodiment, the boronic acid compound is in the form of a complex with meglumine.
摘要:
Compounds of the formula: ##STR1## are provided, in which R.sup.1 and R.sup.2 each independently represent a C.sub.8 -C.sub.24 saturated or unsaturated hydrocarbon chain, which is optionally interrupted by from 1 to 3 heteroatom moieties, such as --O--, --S--, --NH-- and --NR--. The symbol X represents --CH.sub.2 --, --O--, --S--, --NH-- or --NR--. The R group for each of the --NR-- moieties represents an alkyl group having from 1 to 4 carbon atoms. Finally, the subscript n represents the integer 1 or 2, and A.sup.- represents an anion, preferably chloride or citrate.
摘要:
The invention separates defined, active complexes by a characteristic from Defined, active complexes that share a particular physicochemical characteristic such as density, surface charge or particle size are separated from complexes formed by the association of a polynucleotide with a transfecting component that increases transfection activity, such as a lipid, cationic lipid, liposome, peptide, cationic peptide, dendrimer or polycation. In a preferred embodiment, polynucleotide-transfecting component complexes are ultracentrifuged to resolve one or more bands corresponding to complexes having a specific polynucleotide-transfecting component interaction. Polynucleotide complexes having a cationic liposome transfecting component resolve into two primary bands corresponding to complexes formed either under excess lipid conditions or under excess polynucleotide conditions. In an alternate embodiment, polynucleotide-transfecting component complexes are resolved using cross-flow electrophoresis to identify complexes having specific interactions and to separate them from excess initial components.
摘要:
Cationic derivatives of biguanide are provided, which are useful in the preparation of lipid carriers for mediating transfection of mammalian cells in vivo and in vitro.
摘要:
This invention relates to the application of the highly conserved sequences of viral genome, especially from a highly conserved domain of enteroviral genome as templates to design target small ligand RNAs (sliRNAs). The resulting sliRNAs are therapeutically active ingredients in the treatment of the related diseases caused by pathological angiogenesis.
摘要:
The invention comprises stabilized polynucleotide complexes that have a cryoprotectant and are lyophilized. Cryoprotectant compounds comprise carbohydrates or sugars, preferably lactose and sucrose, but also glucose, maltodextrins, mannitol, sorbitol, trehalose, and others. Other suitable cryoprotectants include amino acids such as betaines and prolines. Polynucleotide complexes stabilized according to the invention can be used for transfection, and exhibit improved tranfection efficiency with respect to polynucleotide complexes without cryoprotection.
摘要:
Cationic lipids are provided which are useful in the preparation of liposomes and other lipid vesicle carriers. The lipids of the invention are particularly useful as carriers of nucleic acids and other negatively charged substances, for delivery to cells.
摘要:
This invention relates to the application of the highly conserved sequences of viral genome, especially from a highly conserved domain of enteroviral genome as templates to design target small ligand RNAs (sliRNAs). The resulting sliRNAs are therapeutically active ingredients in the treatment of the related diseases caused by pathological angiogenesis.