Patent ID: 11969505
Assignee: UPM-KYMMENE CORPORATION
Field: Pharmaceuticals (Chemistry)
Classification: CPC A  C  F | IPC A  C  F

Claim 0:
1. A method for freeze-drying extracellular vesicles in a hydrogel comprising nanofibrillar cellulose, the method comprising:
providing a hydrogel comprising nanofibrillar cellulose,
providing extracellular vesicles,
combining the extracellular vesicles and the hydrogel comprising nanofibrillar cellulose to form a vesicle system, and
freeze drying the vesicle system to obtain freeze-dried extracellular vesicles in an aerogel comprising freeze-dried nanofibrillar cellulose;
wherein the nanofibrillar cellulose is selected from anionically modified nanofibrillar cellulose, cationically modified nanofibrillar cellulose and unmodified nanofibrillar cellulose, and TEMPO oxidized nanofibrillar cellulose.