Polypeptide based block copolymer and the process for the preparation thereof, and the polymer micelles using the same
US10064822B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2015 |
| Grant date | Sep 4, 2018 |
| Priority date | — |
| Expiry date | Jan 28, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12N2310/14
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present disclosure relates to a polypeptide based block copolymer having biodegradability due to peptidase, and a process for the preparation thereof, and polymer micelles using the same. The block copolymer according to the present disclosure is a block copolymer of a polyethylene glycol-based compound having properties such that the solubility for water is different depending on the pH, but cannot form micelles due to a self-assembly phenomenon; and a polyglutamic acid-based compound formed using an aminolysis reaction of glutamic acid and tertiary amine in which the end of one alkyl group is substituted with NH2, or using an aminolysis reaction of glutamic acid and triamine. The block copolymer of the present disclosure has advantages in that the block polymer has both pH sensitivity and biodegradability due to peptidase in the body, and thereby a degradation rate related to a drug release cycle is controlled. Therefore, the block copolymer according to the present disclosure is effective in that the block copolymer can be used as a target-oriented drug delivery agent depending on the pH changes in the body, and as a drug delivery agent that can control the rate of degradati…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.