Methods for removal, purification, and concentration of viruses, and methods of therapy based thereupon
First Claim
1. A method for removing a virus from a liquid sample, the method comprising:
- obtaining a membrane engrafted with polymeric side chains, each side chain having one or more positively charged functional groups that interact with viruses, the polymeric side chains each having one functional group per repeat unit, each functional group consisting of a single secondary, tertiary, or guaternary amine, and having a single positive charge at physiological pH, wherein the membrane has a nominal pore sizebetween 20 nm and 1000 nm; and
passing the sample through the membrane to remove viruses from the sample.
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Abstract
The invention is based on the discovery that certain membranes, which include side chains or molecular “brushes” having, for example, tertiary amino functional groups, can be used as highly effective filters to capture viruses/virus particles from liquids without removal of proteins. New methods based on this discovery include removing viruses from liquids such as blood or plasma, removing viruses from pharmaceuticals, concentrating and/or purifying viruses, e.g., for use in gene therapy, and producing recombinant viruses in new bioreactors. The invention also includes new methods of therapy or adjunct therapy for viral infections, in which a patient'"'"'s blood or plasma is filtered through the membranes to remove viruses to reduce the viral load. The invention also includes new bioreactors and viral filters containing the membranes.
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Citations
28 Claims
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1. A method for removing a virus from a liquid sample, the method comprising:
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obtaining a membrane engrafted with polymeric side chains, each side chain having one or more positively charged functional groups that interact with viruses, the polymeric side chains each having one functional group per repeat unit, each functional group consisting of a single secondary, tertiary, or guaternary amine, and having a single positive charge at physiological pH, wherein the membrane has a nominal pore sizebetween 20 nm and 1000 nm; and
passing the sample through the membrane to remove viruses from the sample. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A method for removing a virus from a liquid sample, the method comprising
obtaining a membrane engrafled with polymeric side chains having one or more positively charged functional groups that interact with viruses, wherein at least 97% of the polymeric repeats are covalently linked to a positively charged functional group, the membrane has a nominal pore size between 20 nm and 1000 nm; - and
passing the sample through the membrane to remove viruses from the sample. - View Dependent Claims (27, 28)
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Specification