Methods and compositions for enhancing the bioadhesive properties of polymers
US6368586B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 2000 |
| Grant date | Apr 9, 2002 |
| Priority date | — |
| Expiry date | Mar 27, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K47/02
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Methods and compositions are provided for enhancing the bioadhesive properties of polymers used in drug delivery devices. The bioadhesive properties of a polymer are enhanced by incorporating a anhydrideoligome into the polymer to enhance the ability of the polymer to adhere to a tissue surface such as a mucosal membrane. Anhydrideoligomes which enhance the bioadhesive properties of a polymer include water-insoluble anhydrideoligomes such as water-insoluble metal oxides, including oxides of calcium, iron, copper and zinc. The anhydrideoligomes can be incorporated within a wide range of polymers including proteins, polysaccharides and synthetic biocompatible polymers. In one embodiment, metal oxides can be incorporated within polymers used to form or coat drug delivery devices, such as microspheres, which contain a drug or diagnostic agent. The metal oxides can be provided in the form of a fine dispersion of particles on the surface of a polymer that coats or forms the devices, which enhances the ability of the devices to bind to mucosal membranes. The polymers, for example in the form of microspheres, have improved ability to adhere to mucosal membranes, and thus can be used to del…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.