Stable oxidation resistant powdered hemoglobin, methods of preparing same, and uses thereof
View Patent ↗The present invention provides oxygenated hemoglobins in powdered form and methods of preparing a powdered form of a protein, such as hemoglobin, which comprise (a) mixing a solution of the protein with inulin, and optimally with a reducing sugar such as glucose or tagatose, and (b) drying the mixture. Also provided are blood substitutes formed from reconstituted powdered hemoglobins, and methods of treatment using the blood substitutes.
1. A method of preparing a powdered form of a protein, which comprises:
(a) mixing a solution of the protein with inulin and tagatose, and
(b) drying the mixture.
2. The method of claim 1 , wherein the inulin is derived from Chicory Root.
3. The method of claim 1 , wherein the drying step comprises lyophilization.
4. The method of claim 1 , wherein the drying step comprises air drying.
5. The method of claim 4 , wherein the mixture is cooled as it is being air dried.
6. The method of claim 1 , wherein the protein is hemoglobin.
7. The method of claim 6 , wherein the hemoglobin is pegylated.
8. The method of claim 7 , wherein the pegylated hemoglobin comprises one or more polyethylene glycol (PEG) molecules with a molecular weight of 200-40,000 daltons.
9. The method of claim 8 , wherein the PEGs comprise a PEG with a molecular weight of 5,000 daltons.
10. The method of claim 7 , wherein the hemoglobin is pegylated with 2-8 PEGs.
11. The method of claim 7 , wherein the hemoglobin is pegylated with 2-4 PEGs.
12. The method of claim 6 , wherein the hemoglobin is oxygenated.
13. The method of claim 12 , wherein the hemoglobin is resistant to oxidation.
14. The method of claim 12 , wherein the hemoglobin is stable at room temperature.
15. The method of claim 12 , wherein the powdered hemoglobin contains no more than 20% of the met form of hemoglobin.
16. The method of claim 12 , wherein the powdered hemoglobin contains no more than 10% of the met form of hemoglobin.