Site-specific insulin-polymer conjugates
US9789196B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 2015 |
| Grant date | Oct 17, 2017 |
| Priority date | — |
| Expiry date | Apr 21, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07K14/62
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention is directed to a single-step method for rapidly and efficiently preparing protein-polymer conjugates, including an insulin-polymer conjugate. According to the method of the present invention, a protein and hydrophilic polymer are contacted in the presence of at least one organic solvent and at least one metal chelator, under conditions that promote the formation of a conjugate of the protein and polymer. Thus, the invention is directed to the site-specific modification of selected proteins, such as insulin, with poly(ethylene glycol) at residue PheB1. The invention also provides a pharmaceutical formulation for encapsulating the conjugate in a biodegradable polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.