Method for producing viral vaccines
View Patent ↗The present invention provides a method for the manufacture of a preparation comprising virus antigens comprising a) inoculation of cells with infectious virus in a fluid, b) propagation of said virus in said cells, c) collecting said propagated virus, d) inactivating said collected virus, and e) treating said inactivated virus with a detergent, resulting in a preparation comprising viral antigens.
1. A method for the manufacture of a preparation comprising virus antigens comprising
a) inoculating cells with infectious virus in a fluid,
b) propagating said virus in said cells,
c) collecting said virus propagated in said cells,
d) completely inactivating said virus collected from said cells,
e) purifying the inactivated virus, wherein the purification comprises ultracentrifugation or use of a sucrose gradient,
f) contacting the purified virus with a nuclease, and
g) treating said virus with detergent under conditions effective to yield a split virus,
resulting in a preparation comprising viral antigens, wherein the collected virus of step (c) is not purified prior to the inactivating step.
2. The method of claim 1 , wherein the step of collecting said propagated virus comprises separating the virus from said cells and/or cell debris of said cells after infection.
3. The method of claim 1 , wherein said inactivating is performed by addition of formaldehyde.
4. The method of claim 1 , wherein said inactivating is performed by UV irradiation.
5. The method of claim 1 , wherein said virus propagated in said cells is released into said fluid.
6. The method of claim 1 , wherein step (c) or (d) further comprises treating the virus with a nuclease.
7. The method of claim 6 , wherein said nuclease is Benzonase®.
8. The method of claim 1 , wherein said cells are in form of a cell culture during said virus propagation.
9. The method of claim 1 , wherein said cells are mammalian or avian cells.
10. The method of claim 1 , wherein said cells are epithelial cells.
11. The method of claim 8 , wherein said cells are Vero cells.
12. The method of claim 1 , wherein said virus is an enveloped virus.
13. The method of claim 12 , wherein said virus is an orthomyxo virus.
14. The method of claim 13 , wherein said virus is an influenza virus.
15. The method of claim 1 , wherein the concentration of non-viral protein during said inactivation is below 350 μg/ml.
16. The method of claim 1 , wherein said manufacture is on industrial scale amounts.
17. The method of claim 16 , wherein said inactivation is performed on at least 1 L virus containing fluid.
18. A method for the manufacture of a preparation comprising viral antigens comprising
a) obtaining a clarified supernatant comprising infectious virus,
b) inactivating said virus from step (a),
c) purifying the virus, wherein the purification comprises ultracentrifugation or use of a sucrose gradient,
d) contacting the inactivated, purified virus with a nuclease,
e) treating said virus with detergent under conditions effective to yield a split virus, and
f) further purifying said virus resulting in a preparation comprising viral antigens, wherein the clarified supernatant comprising the infectious virus is not purified prior to the inactivating step.
19. The method of claim 18 , wherein said clarified supernatant is obtained from a cell culture.
20. The method of claim 19 further comprising the step of stabilizing said viral antigens.
21. The method of claim 20 , wherein said viral antigens are stabilized by addition of an effective amount of Tween 80® (polysorbate 80).
22. The method of claim 21 , wherein Tween 80® is in an amount of about 0.125%.