Enhanced adenovirus-assisted transfection composition and method
US5830730A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 1997 |
| Grant date | Nov 3, 1998 |
| Priority date | — |
| Expiry date | May 8, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12N2710/10343
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A composition for transfecting eukaryotic cells comprising a cationic polymer which has protonatable groups which serve to buffer the acidic endosome, protecting the endocytosed polynucleotide from degradation and a viral agent is used to target uptake into and/or lysis from endosomes in the desired eukaryotic cell. By co-infecting the eukaryotic cells with cationic polymer, polynucleotide, and the viral agent, the polynucleotide is brought into the cell and then released. Preferably, polyamidoamine dendrimers are used as the cationic polymer and adenovirus is used as the viral agent. The dendrimers help associate plasmid DNA with the adenovirus, which then provokes receptor-mediated endocytosis. Within the endosome, the tertiary amine groups of the dendrimer buffer the pH change in the endosome. Then, the endosomalytic activity of the adenovirus releases the plasmid DNA into the cell. Also preferably, the adenovirus and the dendrimers are mixed before addition to the polynucleotide and the cells are washed after about 1.5 hours of incubation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.