Antibody purification
First Claim
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1. A method for producing a host cell protein (HCP)-reduced antibody preparation from a mixture comprising an antibody and at least one HCP, the method comprising:
- applying the mixture to a cation exchange resin equilibrated with an equilibration buffer, wherein greater than 30 grams of antibody per liter of cation exchange resin are applied;
washing HCP from the cation exchange resin with a plurality of wash steps comprising a first wash and a second wash, wherein conductivity of the first wash is equivalent to conductivity of the equilibration buffer and there is an increase in conductivity with each successive wash in the plurality of wash steps;
eluting the antibody from the cation exchange resin with an elution buffer to form a first eluate;
applying the first eluate to an anion exchange resin, wherein prior to applying the first eluate to the anion exchange resin, pH and conductivity of the first eluate are adjusted to be substantially similar to pH and conductivity of the anion exchange resin;
obtaining a first flowthrough comprising the antibody, andobtaining the HCP-reduced antibody preparation therefrom.
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Abstract
The invention provides a method for producing a host cell protein-(HCP) reduced antibody preparation from a mixture comprising an antibody and at least one HCP, comprising an ion exchange separation step wherein the mixture is subjected to a first ion exchange material, such that the HCP-reduced antibody preparation is obtained.
282 Citations
64 Claims
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1. A method for producing a host cell protein (HCP)-reduced antibody preparation from a mixture comprising an antibody and at least one HCP, the method comprising:
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applying the mixture to a cation exchange resin equilibrated with an equilibration buffer, wherein greater than 30 grams of antibody per liter of cation exchange resin are applied; washing HCP from the cation exchange resin with a plurality of wash steps comprising a first wash and a second wash, wherein conductivity of the first wash is equivalent to conductivity of the equilibration buffer and there is an increase in conductivity with each successive wash in the plurality of wash steps; eluting the antibody from the cation exchange resin with an elution buffer to form a first eluate; applying the first eluate to an anion exchange resin, wherein prior to applying the first eluate to the anion exchange resin, pH and conductivity of the first eluate are adjusted to be substantially similar to pH and conductivity of the anion exchange resin; obtaining a first flowthrough comprising the antibody, and obtaining the HCP-reduced antibody preparation therefrom. - 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, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. A method for producing a host cell protein (HCP) reduced antibody preparation from a mixture comprising an antibody and at least one HCP, the method comprising:
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applying the mixture to a cation exchange resin equilibrated with an equilibration buffer, wherein greater than 30 grams of antibody per liter of resin are applied; washing HCP from the cation exchange resin with a plurality of wash steps comprising a first wash and a second wash, wherein there is an increase in conductivity from the first wash to the second wash; eluting the antibody from the cation exchange resin with an elution buffer to form a first eluate; subjecting the first eluate to a viral inactivation step; applying the first eluate to an anion exchange resin to obtain a first flow through, wherein prior to applying the first eluate to the anion exchange resin, pH and conductivity of the first eluate are adjusted to be substantially similar to pH and conductivity of the anion exchange resin; applying the first flow through to a hydrophobic interaction column such that a second eluate is obtained; and obtaining the HCP-reduced antibody preparation therefrom. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 56, 57, 58, 59, 60, 61, 62, 63, 64)
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47. A method for producing a host cell protein (HCP)-reduced antibody preparation from a mixture comprising an antibody and at least one HCP, the method comprising:
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applying the mixture to a cation exchange resin equilibrated with an equilibration buffer, wherein the cation exchange resin is at pH 7 and about 35 grams of antibody per liter of resin are applied, or the cation exchange resin is at a pH in a range of pH 5 to pH 7 and about 35 to about 70 grams of antibody per liter of resin are applied; washing HCP from the cation exchange resin with wash steps comprising a first wash using the equilibration buffer and a second wash using a mixture of an elution buffer and water; eluting the antibody from the cation exchange resin with the elution buffer to form a first eluate; subjecting the first eluate to a viral inactivation step, wherein viral inactivation is achieved by pH viral inactivation such that the first eluate is virally inactivated; applying the first eluate to an anion exchange resin, wherein, prior to applying the first eluate to the anion ion exchange resin, pH and conductivity of the first eluate are adjusted to be substantially similar to pH and conductivity of the anion exchange resin, such that a first flow through is obtained; applying the first flow through to a hydrophobic interaction column such that a second eluate is obtained; and obtaining the HCP-reduced antibody preparation therefrom. - View Dependent Claims (48, 49, 50, 51, 52, 53, 54)
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55. A method for producing a host cell protein (HCP)-reduced antibody preparation from a mixture comprising an antibody and at least one HCP, the method comprising:
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applying the mixture to a cation exchange resin equilibrated with an equilibration buffer, wherein greater than about 30 grams of antibody per liter of resin are applied; washing HCP from the cation exchange resin with a plurality of wash steps comprising a first wash and a second wash, wherein the first wash is with equilibration buffer and the second wash is a mixture of an elution buffer and water; eluting the antibody from the cation exchange resin with the elution buffer to form a first eluate; applying the first eluate to an anion exchange resin, wherein prior to applying the first eluate to the anion exchange resin, pH and conductivity of the first eluate are adjusted to be substantially similar to pH and conductivity of the anion exchange resin; obtaining a first flow through comprising the antibody; and obtaining the HCP-reduced antibody preparation therefrom.
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Specification