Virus preparations and methods
First Claim
1. A process for purifying a herpesvirus preparation, which comprises (a) culturing host cells infected with the virus, (b) contacting the cells with an eluant without substantial cell breakage, and eluting the virus from said cells in said eluant, (c) contacting the herpesvirus-containing eluate to be purified, with an affinity binding reagent that comprises a solid phase carrying a sulfate or sulfonate-comprising binding group that can bind materials with affinity for heparin, thereby to bind said herpesvirus to the affinity binding reagent, (d) washing said affinity binding reagent carrying said herpesvirus, and (e) eluting said herpesvirus from said binding reagent.
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Accused Products
Abstract
Herpesvirus preparations, e.g. cultured HSV type 2, e.g. genetically disabled virus for vaccine use, can be purified, e.g. for subsequent pharmaceutical formulation, with solid phase affinity reagents containing sulfate- or sulfonate-comprising binding groups, e.g. sulfated polysacharide groups, e.g. heparin or dextran sulfate, and eluting e.g. with salt solutions. The process can be combined with other culture and harvesting steps.
49 Citations
19 Claims
- 1. A process for purifying a herpesvirus preparation, which comprises (a) culturing host cells infected with the virus, (b) contacting the cells with an eluant without substantial cell breakage, and eluting the virus from said cells in said eluant, (c) contacting the herpesvirus-containing eluate to be purified, with an affinity binding reagent that comprises a solid phase carrying a sulfate or sulfonate-comprising binding group that can bind materials with affinity for heparin, thereby to bind said herpesvirus to the affinity binding reagent, (d) washing said affinity binding reagent carrying said herpesvirus, and (e) eluting said herpesvirus from said binding reagent.
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13. A process for purifying a herpesvirus preparation, comprising:
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(a) contacting a herpesvirus-containing composition with an affinity binding reagent, thereby to bind the herpesvirus to the affinity binding reagent, wherein the herpesvirus-containing composition is a liquid which comprises sodium chloride or other pharmaceutically acceptable salt in a concentration greater than about 0.4 M, or a liquid which comprises a sulfated or sulfonated polysaccharide, and the affinity binding reagent comprises a solid phase carrying a sulfate- or sulfonate-comprising binding group that can bind materials with affinity for heparin;
(b) washing said affinity binding reagent carrying said herpesvirus; and
(c) eluting said herpesvirus from said binding reagent. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification