Microgel particles for the delivery of bioactive materials
US7056901B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2003 |
| Grant date | Jun 6, 2006 |
| Priority date | — |
| Expiry date | Mar 28, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2039/55555
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Novel microgels, microparticles and related polymeric materials capable of delivering bioactive materials to cells for use as vaccines or therapeutic agents. The materials are made using a crosslinker molecule that contains a linkage cleavable under mild acidic conditions. The crosslinker molecule is exemplified by a bisacryloyl acetal crosslinker. The new materials have the common characteristic of being able to degrade by acid hydrolysis under conditions commonly found within the endosomal or lysosomal compartments of cells thereby releasing their payload within the cell. The materials can also be used for the delivery of therapeutics to the acidic regions of tumors and sites of inflammation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.