Graft copolymer polyelectrolyte complexes for drug delivery
US9271933B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 14, 2013 |
| Grant date | Mar 1, 2016 |
| Priority date | — |
| Expiry date | Mar 14, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12N2320/32
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Graft copolymer polyelectrolyte complexes are disclosed for the efficient delivery of anionic, cationic or polyelectrolyte therapeutic agents into biological cells, and for maintaining the biological activity of these molecules while in serum and other aqueous environments are provided. Such complexes comprise (1) an anionic graft copolymer containing an anionic polymer backbone, with pendent carboxylic acid groups and pendant chains containing amphipathic or hydrophilic polymers covalently bonded to a portion of the pendant carboxylic acid groups, (2) one or more anionic, cationic or polyelectrolyte therapeutic agents, and (3) optionally a liposome optionally containing an additional therapeutic agent. Also disclosed are functional nanoparticles containing the complexes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.