Use of hydrophobic organic acids to increase hydrophobicity of proteins and protein conjugates
US10046058B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2015 |
| Grant date | Aug 14, 2018 |
| Priority date | — |
| Expiry date | Nov 30, 2035 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P43/00
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Examples may include a microsphere. The microsphere may include a biodegradable polymer. Furthermore, the microsphere may include a protein mixture selected from the group consisting of a protein-polyethylene glycol conjugate, the protein-polyethylene glycol conjugate and the hydrophobic anion of the organic acid, a protein and the hydrophobic anion of the organic acid, and combinations thereof. Examples may also include a method of making the microspheres. The method may further include reacting a polyethylene glycol with a protein to form a protein-PEG conjugate. In addition, the method may include protonating an amino group on the protein-PEG conjugate with a hydrophobic organic acid to form the protein-PEG conjugate salt. Furthermore, the method may include mixing the protein-PEG conjugate salt in an organic solvent with a biodegradable polymer. The method may also include emulsifying the mixture. Additionally, the method may include hardening the emulsified mixture into the controlled-release microspheres.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.