Stem cell biomimetic microparticles
US11564889B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 2017 |
| Grant date | Jan 31, 2023 |
| Priority date | — |
| Expiry date | Apr 18, 2038 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K47/34
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Provided are stem cell biomimetic microparticles comprised of at least one stem cell-derived paracrine polypeptide or growth factor embedded in a polymer core particle that further comprises an outer layer of at least one fragment of a cell membrane of a stem cell disposed on the core particle. The polymer core may be constituted of any biocompatible and biodegradable polymer or copolymer, or a combination thereof that allows the embedding of the paracrine factors and their prolonged release from the core. The core and hence the microparticles can be biodegradable, allowing eventual elimination from the recipient animal or human subject. The core particles are sized to allow both transport through blood vessels and extravasation from the blood vessels into the surrounding tissues. The core particle may further include at least one polypeptide or peptide growth factor to induce the generation and proliferation of a population of stem cells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.