Methods of adenovirus purification
First Claim
Patent Images
1. A method of purifying adenovirus particles from a cell culture medium comprising adenovirus particles which comprises:
- a) lysing host cells within the cell culture medium;
b) selectively precipitating impurity DNA away from the adenovirus particles by adding a selective precipitation agent to the cell culture medium, wherein the selective precipitation agent is selected from the group consisting of domiphen bromide (DB), cetylpyridinium chloride (CPC), cetyltrimethylammonium bromide (CTAB), benzethonium chloride (BTC), tetradecyltrimethylammonium bromide or chloride (TTA), and polyethylene imine (PEI);
c) clarifying the cell culture medium; and
d) recovering purified adenovirus particles from the cell culture medium;
wherein at least 80% of impurity DNA is precipitated away from the cell culture medium.
5 Assignments
0 Petitions
Accused Products
Abstract
A process for purifying virus particles, especially recombinant adenovirus vector particles, is presented. The process relies on various combinations of cell lysis, detergent-based precipitation of host cell contaminants away from the virus, depth filtration or centrifugation, ultrafiltration, nuclease digestion and chromatography to robustly and economically produce highly purified product. This process results in contaminating DNA levels which are consistently below detectable levels.
-
Citations
20 Claims
-
1. A method of purifying adenovirus particles from a cell culture medium comprising adenovirus particles which comprises:
-
a) lysing host cells within the cell culture medium; b) selectively precipitating impurity DNA away from the adenovirus particles by adding a selective precipitation agent to the cell culture medium, wherein the selective precipitation agent is selected from the group consisting of domiphen bromide (DB), cetylpyridinium chloride (CPC), cetyltrimethylammonium bromide (CTAB), benzethonium chloride (BTC), tetradecyltrimethylammonium bromide or chloride (TTA), and polyethylene imine (PEI); c) clarifying the cell culture medium; and d) recovering purified adenovirus particles from the cell culture medium; wherein at least 80% of impurity DNA is precipitated away from the cell culture medium. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification