Methods and compositions for stabilizing dried biological materials
The present invention relates to methods for producing dried formulations of biopharmaceutical agents that aim to minimize the loss of activity of the agents upon drying and to provide dried formulations with an extended shelf life. The method comprises the step of drying an aqueous solution comprising, in addition to the biopharmaceutical agent, at least an amino acid, a polyol and a metal salt. Preferably the amino acid is glutamate, the polyol is sorbitol and optionally also mannitol and the metal salt is a magnesium salt. The solution is dried by vacuum drying or by lyophilization. The methods are particularly useful for preparing dried formulations of viruses such as poliovirus or respiratory syncytial virus to be used for vaccination. The invention also relates to dried formulations prepared in accordance with the methods of the invention and to their use as medicaments, e.g. as vaccines.
1. A method for producing a formulation of a biopharmaceutical agent, comprising drying a solution comprising:
(a) a biopharmaceutical agent comprising a human or bovine RSV,
(b) glutamate,
(c) a polyol comprising sorbitol and/or sucrose,
(d) at least 0.2% (w/v) of a metal salt and water, wherein the metal salt is Mg 2+ , and,
(e) one or more of mannitol, mannose, maltitol and/or one or more of arginine, histidine, isoleucine, asparagine, lysine, leucine, glycine.
2. The method according to claim 1 , wherein the solution consists essentially of 1 pg-10 g per ml of the biopharmaceutical agent, 0.01-20% (w/v) of the amino acid, 0.5-20% (w/v) of the polyol, 0.2-10% (w/v) of the metal salt and water.
3. The method according to claim 1 , wherein the glutamate is dissolved in the solution in the form of monosodium glutamate, and/or wherein the arginine is in the form of poly-L-arginine and/or wherein the lysine is in the form of poly-L-lysine.
4. The method according to claim 3 , wherein the solution consists essentially of 1 pg-10 g per ml of the biopharmaceutical agent, 5-20% (w/v) sorbitol, 5-20% (w/v) monosodium glutamate, 2-10% (w/v) of a magnesium salt, and optionally 5-20% (w/v) mannitol.
5. The method according to claim 1 , wherein the solution further comprises a pharmaceutically acceptable buffer and is buffered at a neutral pH.
6. The method according to claim 1 , wherein the drying is by air drying, vacuum drying, spray drying or by lyophilization.
7. The method according to claim 1 , wherein the RSV is a clinical isolate.
8. The method according to claim 7 , wherein the RSV clinical isolate has been passaged less than 10 times.
9. The method according to claim 8 , wherein the RSV clinical isolate has been passaged less than 8 times.
10. The method according to claim 9 , wherein the RSV clinical isolate has been passaged less than 6 times.
11. The method according to claim 10 , wherein the RSV clinical isolate has been passaged less than 5 times.
12. The method according to claim 1 , wherein the RSV comprises a viral genome having a deleted or inactivated G attachment protein gene.