Ionic molecular conjugates of biodegradable polyesters and bioactive polypeptides
US5672659A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 1995 |
| Grant date | Sep 30, 1997 |
| Priority date | — |
| Expiry date | Jun 29, 2015 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K38/00
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A composition including a polyester containing one or more free COOH groups ionically conjugated with a bioactive polypeptide comprising at least one effective ionogenic amine, wherein the polyester contains a member selected from the group of L-lactic acid, D-lactic acid, DL-lactic acid, .epsilon.-caprolactone, p-dioxanone, .epsilon.-caprolic acid, alkylene oxalate, cycloalkylene oxalate, alkylene succinate, .beta.-hydroxybutyrate, substituted or unsubstituted trimethylene carbonate, 1,5-dioxopan-2-one, 1,4-dioxepan-2-one, glycolide, glycolic acid, L-lactide, D-lactide, DL-lactide, meso-lactide, and any optically active isomers, racemates or copolymers thereof, and at least 50%, by weight, of the polypeptide present in the composition is ionically conjugated to said polyester.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.