Therapeutic preparation of very high purity FVIIa and method for obtaining same
View Patent ↗The therapeutic preparation of FVIIa having a purity of at least 1000 IU/mg of protein is characterized in that said preparation is free of proteins of non-human origin. In the method for obtaining FVII, purification starts from FrII+III, FrIII or equivalent of Cohn fractioning and comprises precipitation with PEG, chromatography and its subsequent activation.
1. A therapeutic preparation of factor VIIa (FVIIa) having a purity of at least 6000 IU/mg of protein, wherein the FVIIa is purified from human plasma and wherein said preparation is free of proteins of non-human origin.
2. The therapeutic preparation of FVIIa according to claim 1 , wherein the FVIIa is present at a concentration of at least 12000 IU/ml.
3. The therapeutic preparation of FVIIa according to claim 1 , wherein said preparation has been subjected to at least one stage of elimination of pathogenic agents, wherein the pathogenic agents include a virus or viral particle.
4. A method for obtaining a therapeutic preparation of factor VIIa (FVIIa) having a purity of at least 6000 IU/mg of protein , wherein FVII is purified from human plasma staffing from FrII+III, FrIII, or equivalent of Cohn fractioning, the method comprising precipitating FVII with PEG, and isolating FVII by chromatography followed by an independent activation step activating the separated FVII to form FVIIa, wherein said preparation is free of proteins of non-human origin.
5. The method for obtaining a therapeutic preparation of FVIIa according to claim 4 , wherein the suspension of FrII+III, FrIII or equivalent of Cohn fractioning is precipitated at a concentration of between 3 and 700% of PEG.
6. The method for obtaining a therapeutic preparation of FVIIa according to claim 4 , wherein FVII is captured by ion exchange chromatography.
7. The method for obtaining a therapeutic preparation of FVIIa according to claim 6 , wherein ion exchange chromatography elution is carried out by change of pH.
8. The method for obtaining a therapeutic preparation of FVIIa according to claim 4 , wherein FVII is purified by hydrophobic interaction chromatography.
9. The method for obtaining a therapeutic preparation of FVIIa according to claim 4 , wherein the procedure is carried out in the absence of ammonium salts.
10. The method for obtaining a therapeutic preparation of FVIIa according to claim 4 , wherein a stage of purification of FVII is carried out by Metal Chelation Chromatography.
11. The method for obtaining a therapeutic preparation of FVIIa according to claim 10 , wherein the metal chelation chromatography is Ni-chelation chromatography.
12. The method for obtaining a therapeutic preparation of FVIIa according to claim 4 , wherein the FVII is activated in the presence of calcium.
13. The method for obtaining a therapeutic preparation of FVIIa according to claim 4 , wherein the method comprises at least one specific stage of virus elimination.
14. The method for obtaining a therapeutic preparation of FVIIa according to claim 13 , wherein the stage of virus elimination is carried out by nanofiltration.
15. The method for obtaining a therapeutic preparation of FVIIa according to claim 13 , wherein the stage of virus elimination is carried out by treatment with solvent/detergent.