Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07K—PEPTIDES
  • C07K1/00—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length
  • C07K1/14—Extraction; Separation; Purification
  • C07K1/16—Extraction; Separation; Purification by chromatography
  • C07K1/22—Affinity chromatography or related techniques based upon selective absorption processes
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07K—PEPTIDES
  • C07K16/00—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies
  • C07K16/08—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from viruses
  • C07K16/10—RNA viruses
  • C07K16/108—Orthomyxoviridae (F), e.g. influenza virus
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07K—PEPTIDES
  • C07K16/00—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies
  • C07K16/18—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07K—PEPTIDES
  • C07K16/00—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies
  • C07K16/18—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans
  • C07K16/22—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans against growth factors ; against growth regulators
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07K—PEPTIDES
  • C07K16/00—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies
  • C07K16/18—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans
  • C07K16/24—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans against cytokines, lymphokines or interferons
  • C07K16/244—Interleukins [IL]
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07K—PEPTIDES
  • C07K16/00—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies
  • C07K16/18—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans
  • C07K16/28—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
  • C07K16/2803—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against the immunoglobulin superfamily
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07K—PEPTIDES
  • C07K16/00—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies
  • C07K16/18—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans
  • C07K16/28—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
  • C07K16/2803—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against the immunoglobulin superfamily
  • C07K16/2809—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against the immunoglobulin superfamily against the T-cell receptor (TcR)-CD3 complex
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07K—PEPTIDES
  • C07K16/00—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies
  • C07K16/18—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans
  • C07K16/28—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
  • C07K16/2851—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against the lectin superfamily, e.g. CD23, CD72
  • C07K16/2854—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against the lectin superfamily, e.g. CD23, CD72 against selectins, e.g. CD62
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07K—PEPTIDES
  • C07K16/00—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies
  • C07K16/18—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans
  • C07K16/28—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
  • C07K16/30—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants from tumour cells
  • C07K16/3007—Carcino-embryonic Antigens
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07K—PEPTIDES
  • C07K16/00—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies
  • C07K16/18—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans
  • C07K16/32—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans against translation products of oncogenes
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07K—PEPTIDES
  • C07K16/00—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies
  • C07K16/18—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans
  • C07K16/36—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans against blood coagulation factors
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07K—PEPTIDES
  • C07K2317/00—Immunoglobulins specific features
  • C07K2317/10—Immunoglobulins specific features characterized by their source of isolation or production
  • C07K2317/14—Specific host cells or culture conditions, e.g. components, pH or temperature
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07K—PEPTIDES
  • C07K2317/00—Immunoglobulins specific features
  • C07K2317/30—Immunoglobulins specific features characterized by aspects of specificity or valency
  • C07K2317/31—Immunoglobulins specific features characterized by aspects of specificity or valency multispecific

Definitions

• the present invention relates to the field of purification of polypeptides.
• the present invention in particular relates to the reduction of host cell proteins like phospholipase B-like 2 (PLBL2) or Clusterin in solutions containing antibodies.
• PLBL2 phospholipase B-like 2
• Clusterin in solutions containing antibodies.
• Proteins and especially immunoglobulins play an important role in today's medical portfolio. For human application every therapeutic protein has to meet distinct criteria. To ensure the safety of biopharmaceutical agents to humans by-products accumulating during the production process have to be removed especially. To fulfill the regulatory specifications one or more purification steps have to follow the manufacturing process. Among other things, purity, throughput, and yield play an important role in determining an appropriate purification process.
• affinity chromatography e.g. protein A or protein G affinity chromatography, single chain Fv ligand affinity chromatography
• ion exchange chromatography e.g. cation exchange (sulfopropyl or carboxymethyl resins), anion exchange (amino ethyl resins) and mixed-mode ion exchange
• thiophilic adsorption e.g. with beta-mercaptoethanol and other SH ligands
• hydrophobic interaction or aromatic adsorption chromatography e.g.
• an affinity chromatography step like protein A affinity chromatography is followed by one or more additional separation steps.
• high conductivity buffers are described to be employed in wash steps of affinity chromatrography methods.
• a method for purifying a protein including one or more chromatographic processes, in which an amino acid; or a dipeptide, an oligopeptide, or a polyamino acid thereof is included in a buffer solution used in at least one chromatographic process (equilibration buffer, wash buffer, and elution buffer), thereby purifying a high-purity protein with a very small quantity of the impurity (e.g., polymers or host cell proteins) is reported in EP2583973.
• a buffer solution used in at least one chromatographic process equilibration buffer, wash buffer, and elution buffer
• the method of the current invention which uses a low conductivity aqueous solution in a wash step of an affinity chromatography prior to the recovery of an antibody from the chromatographic material, that the content of certain host cell proteins in a solution comprising the antibody can be reduced. Accordingly, it has been found that the content of phospholipases (in particular phospholipase B-like 2 (PLBL2)) can be reduced. It has been found that the PLBL2 content can be reduced 100-fold or more if the antibody is of the IgG4 isotype.
• phospholipases in particular phospholipase B-like 2 (PLBL2)
• One aspect as reported herein is the use of a low conductivity aqueous solution in a wash step of a protein A chromatography for reducing the content of a host cell protein wherein the protein A chromatography is used to purify a human IgG1 or a human IgG4 isotype antibody.
• the human IgG4 isotype antibody is an antibody against P-selectin, or an bispecific antibody against factor IXa and factor X, or an antibody against IL-13, or an antibody against amyloid beta.
• the human IgG1 isotype antibody is an antibody against Influenza B, or an antibody against VEGF-A, or an antibody against CD22, or a bispecific antibody against HER3 and EGFR, or an antibody against amyloid beta, or an antibody against Her2, or a bispecific antibody against Ang2 and VEGF-A, or a bispecific antibody against carcinoembryonic antigen (CEA) and CD3.
• the low conductivity aqueous solution has a conductivity value of about 0.5 mS/cm or less.
• the host cell protein is phospholipase B-like 2 (PLBL2) or Clusterin.
• the low conductivity aqueous solution comprises about 0.1 mM to about 8 mM Tris.
• the low conductivity aqueous solution comprises about 0.05 mM to about 2 mM potassium phosphate.
• the low conductivity aqueous solution has a pH of about 7 or higher.
• the low conductivity aqueous solution wash step is preceded or succeeded by a high conductivity aqueous solution wash step.
• the high conductivity aqueous solution has a conductivity value of about 20 mS/cm or higher.
• an intermediate wash step is performed with a medium conductivity aqueous solution between the low conductivity aqueous solution wash step and the high conductivity aqueous solution wash step.
• the medium conductivity aqueous solution has a conductivity value of from more than 0.5 mS/cm to less than 20 mS/cm.
• the high (or medium) conductivity aqueous solution comprises Histidine.
• One aspect as reported herein is a method for producing a human IgG4 or IgG1 isotype antibody comprising the steps of
• One aspect as reported herein is method for purifying a human IgG4 or IgG1 isotype antibody from a sample comprising the steps of
• the human IgG4 isotype antibody is an antibody against P-selectin or a bispecific antibody against factor IXa and factor X or an antibody against IL-13 or an antibody against amyloid beta.
• the human IgG1 isotype antibody is an antibody against Influenza B or an antibody against VEGF-A or an antibody against CD22 or a bispecific antibody against HER3 and EGFR or an antibody against amyloid beta or an antibody against Her2 or a bispecific antibody against Ang2 and VEGF-A, or a bispecific antibody against carcinoembryonic antigen (CEA) and CD3.
• the low conductivity aqueous solution has a conductivity value of about 0.5 mS/cm or less.
• the content of a host cell protein is reduced and the (specific) host cell protein is phospholipase B-like 2 (PLBL2) or Clusterin.
• PLBL2 phospholipase B-like 2
• Clusterin phospholipase B-like 2
• the low conductivity aqueous solution comprises about 0.1 mM to about 8 mM Tris.
• the low conductivity aqueous solution comprises about 0.05 mM to about 2 mM potassium phosphate.
• the low conductivity aqueous solution has a pH of about 7 or higher.
• the method additionally comprises washing the affinity chromatography material with a high conductivity aqueous solution and/or with a medium conductivity aqueous solution before or after washing the protein A chromatography material with low conductivity aqueous solution.
• the high conductivity aqueous solution has a conductivity value of about 20 mS/cm or higher.
• the medium conductivity aqueous solution has a conductivity value of from more than 0.5 mS/cm to less than 20 mS/cm.
• the high or medium conductivity aqueous solution comprises Histidine.
• a wash step with a low conductivity aqueous solution when this wash step is used in an affinity chromatography step, e.g. a protein A chromatrography step.
• the affinity chromatography step is used in a purification or production method for antibodies.
• the low conductivity aqueous solution wash step is particularly effective to reduce the content of phospholipase B-like 2 (PLBL2).
• One aspect as reported herein is the use of a low conductivity aqueous solution in a wash step of an affinity chromatography for reducing the content of a (specific) host cell protein.
• One aspect as reported herein is a method for producing a human IgG isotype antibody comprising
• One aspect as reported herein is a method for purifying a human IgG isotype antibody from a sample comprising the steps of
• Recombinant polypeptides produced in CHO cells may be purified according to the methods described herein to remove or reduce levels of a host cell proteins.
• Exemplary recombinant polypeptides include therapeutic antibodies and immunoadhesins, including, without limitation, antibodies, including antibody fragments, to one or more of the following antigens: HER1 (EGFR), HER2 (e.g., trastuzumab, pertuzumab), HER3, HER4, VEGF (e.g., bevacizumab, ranibizumab), MET (e.g., onartuzumab), CD20 (e.g., rituximab, obinutuzumab, ocrelizumab), CD22, CD11a, CD11b, CD11c, CD18, an ICAM, VLA-4, VCAM, IL-17A and/or F, IgE (e.g., omalizumab), DRS, CD40, Apo2L/TRAIL, EGFL7 (e.g., parsatuzumab), NRP1, integrin beta7 (e.g., etro
• exemplary antibodies include those selected from, and without limitation, antiestrogen receptor antibody, anti-progesterone receptor antibody, anti-p53 antibody, anticathepsin D antibody, antiBcl-2 antibody, anti-E-cadherin antibody, anti-CA125 antibody, anti-CA15-3 antibody, antiCA19-9 antibody, anti-c-erbB-2 antibody, anti-P-glycoprotein antibody, anti-CEA antibody, Ki-67 antibody, anti-PCNA antibody, anti-CD3 antibody, anti-CD4 antibody, anti-CD5 antibody, anti-CD7 antibody, anti-CD8 antibody, anti-CD9/p24 antibody, anti-CD10 antibody, anti-CD11c antibody, anti-CD13 antibody, anti-CD14 antibody, anti-CD15 antibody, anti-CD19 antibody, anti-CD23 antibody, anti-CD30 antibody, anti-CD31 antibody, anti-CD33 antibody, anti-CD34 antibody, anti-CD35 antibody, anti-CD38 antibody, anti-CD41 antibody, antiLCA/CD45 antibody, anti-CD45RO antibody
• exemplary antibodies include antibodies to Abeta, antibodies to IL17 A/F and antibodies to CMV.
• Exemplary anti-Abeta antibodies and methods of producing such antibodies have been described previously, for example, in WO2008011348, WO2007068429, WO2001062801, and WO2004071408.
• Exemplary anti-IL17 A/F antibodies and methods of producing such antibodies have been described previously, for example, in WO 2009136286 and U.S. Pat. No. 8,715,669.
• Exemplary anti-CMV antibodies, including anti-CMV-MSL, and methods of producing such antibodies have been described previously, for example, in WO 2012047732.
• the affinity chromatography is used to purify a human IgG isotype antibody. In some embodiments the affinity chromatography is used to purify an IgG4 antibody. In one embodiment the IgG4 isotype antibody is an antibody against P-selectin or a (bispecific) antibody against factor IXa and factor X or an antibody against IL-13 or an antibody against amyloid beta. In some embodiments the affinity chromatography is used to purify an IgG1 isotype antibody.
• the IgG1 isotype antibody is an antibody against Influenza B or an antibody against VEGF-A or an antibody against CD22 or an (bispecific) antibody against HER3 and EGFR or an antibody against amyloid beta or an antibody against Her2 or a bispecific antibody against Ang2 and VEGF-A or a bispecific antibody against carcinoembryonic antigen (CEA) and CD3.
• One aspect as reported herein is a method for producing a human IgG4 isotype antibody (containing solution) comprising
• One aspect as reported herein is a method for producing an IgG4 isotype antibody (containing solution) comprising
• One aspect as reported herein is a method for purifying a human IgG4 isotype antibody from a sample comprising the steps of
• One aspect as reported herein is a method for purifying an IgG4 isotype antibody from a sample comprising the steps of
• the content of a host cell protein can be reduced if the conductivity of the aqueous solution used in the wash step is low i.e a low conductivity aqueous solution is used for washing.
• the low conductivity aqueous solution has a conductivity value of about 1 mS/cm or less. In one preferred embodiment of all aspects the low conductivity aqueous solution has a conductivity value of about 0.5 mS/cm or less. In one embodiment the low conductivity aqueous solution has a conductivity value of from about 0.03 ⁇ S/cm to about 0.5 mS/cm.
• the low conductivity aqueous solution has a conductivity value of from about 0.05 ⁇ S/cm to about 0.35 mS/cm. In one embodiment of all aspects the low conductivity aqueous solution is deionized water. For some applications deionized water is not suitable to be used in a wash step. In some embodiments the low conductivity aqueous solution is not deionized water.
• the affinity chromatography is a protein A affinity chromatography.
• the protein A affinity chromatography is selected from the group comprising MabSelectSure affinity chromatography, ProSep vA affinity chromatography, Poros Mab Capture A affinity chromatography, ProSep Ultra Plus affinity chromatography, MabSelect SuRe LX, MabSelect, Eshmuno A, Toyopearl AF-rProtein A-650F; Toyopearl AF-rProtein A HC-650HF).
• the affinity chromatography is a protein G affinity chromatography.
• the affinity chromatography is an affinity chromatography that uses a recombinant protein as a ligand, that means that the affinity chromatography is a recombinant protein ligand affinity chromatography.
• the affinity chromatography is an affinity chromatography that uses a single chain Fv as a ligand, that means that the affinity chromatography is a single chain Fv ligand affinity chromatography.
• the affinity chromatography comprises a mutated Protein A coupled to a chromatography matrix or a fragment of Protein A coupled to a chromatography matrix.
• the content of (specific) host cell proteins can be reduced. It has been found that especially the content of phospholipase B-like 2 (PLBL2) can be reduced.
• the (specific) host cell protein is a Chinese hamster ovary (CHO) host cell protein.
• the (specific) host cell protein is phospholipase B-like 2 (PLBL2) or Clusterin.
• the (specific) host cell protein is phospholipase B-like 2 (PLBL2).
• low conductivity aqueous solution may comprise certain buffering substances e.g. Tris or potassium phosphate in low amounts.
• the low conductivity aqueous solution contains tris(hydroxymethyl)aminomethane (Tris).
• Tris tris(hydroxymethyl)aminomethane
• the low conductivity aqueous solution comprises about 0.1 mM to about 10 mM Tris.
• the low conductivity aqueous solution comprises about 0.5 mM to about 6.5 mM Tris.
• the low conductivity aqueous solution comprises about 2 mM Tris.
• the low conductivity aqueous solution contains potassium phosphate.
• the low conductivity aqueous solution comprises about 0.05 mM to about 5 mM potassium phosphate.
• the low conductivity aqueous solution comprises about 0.05 mM to about 2 mM potassium phosphate.
• the low conductivity aqueous solution comprises about 0.5 mM potassium phosphate.
• the low conductivity aqueous solution has a certain pH.
• the low conductivity aqueous solution has a pH of about 7 or higher.
• the low conductivity aqueous solution has a pH of about 7.5 or higher.
• the low conductivity aqueous solution has a pH of from about 7 to about 9.5.
• the low conductivity aqueous solution has a pH of from about 7.5 to about 8.5.
• the low conductivity aqueous solution has a pH of about 8.
• the low conductivity aqueous solution has a pH of about 9.
• the effect of reducing the content of a host cell protein can also be achieved if the pH of the low conductivity aqueous solution is about 8.5 or higher and the low conductivity aqueous solution has a conductivity value of about 1.2 mS/cm or less.
• the low conductivity aqueous solution has a pH of about 8.5 or higher and the low conductivity aqueous solution has a conductivity value of about 1.2 mS/cm or less.
• the low conductivity aqueous solution has a pH of about 8.5 or higher and the low conductivity aqueous solution has a conductivity value of about 1 mS/cm or less.
• low conductivity aqueous solution has a pH of about 8.5 or higher and the low conductivity aqueous solution comprises about 55 mM Tris or less. In one embodiment low conductivity aqueous solution has a pH of about 8.5 or higher and the low conductivity aqueous solution comprises about 30 mM Tris or less.
• the low conductivity aqueous solution is in the pH range of from pH 7 to less than pH 8.5 and has a conductivity value of about 0.5 mS/cm or less and at a pH value of 8.5 or more a conductivity value of about 1.2 mS/cm or less.
• the content of host cell proteins like PLBL2 can be reduced to a certain level, e.g. when compared to the load amount of PLBL2 prior to a purification step like an affinity chromatography step.
• the content of PLBL2 is reduced at least 20-fold.
• the content of PLBL2 is reduced at least 40-fold.
• the content of PLBL2 is reduced at least 50-fold.
• the content of PLBL2 is reduced at least 90-fold.
• the content of PLBL2 is reduced at least 100-fold. In some cases the level of reduction is even higher.
• the content of PLBL2 is reduced at least 200-fold.
• the content of PLBL2 is reduced at least 250-fold. In some embodiments the content of PLBL2 is reduced at least 300-fold. In some embodiments the content of PLBL2 is reduced at least 400-fold. In some embodiments the content of PLBL2 is reduced at least1000-fold. In one embodiment the content of PLBL2 is reduced at least by 50%. In one embodiment the content of PLBL2 is reduced at least by 66%. In one embodiment the content of PLBL2 is reduced at least by 80%. In one embodiment the content of PLBL2 is reduced at least by 90%. In one embodiment the content of PLBL2 is reduced at least by 95%. In some embodiments the content of PLBL2 is reduced to below 10 ng per mg of antibody. In some embodiments the content of PLBL2 is reduced to below 5 ng per mg of antibody. In some embodiments the content of PLBL2 is reduced to below 2 ng per mg of antibody.
• wash steps can be employed with medium and/or high conductivity aqueous solutions.
• the low conductivity aqueous solution wash step is preceded or succeeded by a high conductivity aqueous solution wash step.
• the high conductivity aqueous solution has a conductivity value of about 20 mS/cm or higher.
• the high conductivity aqueous solution has a conductivity value of from about 20 mS/cm to about 100 mS/cm.
• an intermediate wash step is performed with a medium conductivity aqueous solution between the low conductivity aqueous solution wash step and the high conductivity aqueous solution wash step.
• the medium conductivity aqueous solution has a conductivity value of from more than 0.5 mS/cm to less than 20 mS/cm.
• the host cell protein reducing effect can be improved when the high or medium conductivity aqueous solution further comprises an amino acid.
• the high or medium conductivity aqueous solution comprises an amino acid.
• the high or medium conductivity aqueous solution comprises Histidine or Arginine.
• the high or medium conductivity aqueous solution comprises Histidine.
• the high or medium conductivity aqueous solution comprises Histidine and Tris.
• the methods and the uses as reported herein may include one or more further chromatography steps.
• at least one additional chromatography method/step is performed.
• an additional ion exchange chromatography method/step is performed.
• an additional anion exchange chromatography method/step is performed.
• an additional anion exchange chromatography method/step and an additional cation exchange chromatography method/step are performed.
• hydrophobic interaction chromatography step may be omitted.
• the use or the methods is without an hydrophobic interaction chromatography method/step.
• One aspect as reported herein is the use of a low conductivity aqueous solution in a wash step of a protein A chromatography for reducing the content of PLBL2 or Clusterin wherein the protein A chromatography is used to purify an IgG4 or IgG1 isotype, e.g., a human IgG4 or IgG1, antibody and wherein the low conductivity aqueous solution has a conductivity value of about 0.5 mS/cm or less and a pH of about 7 or higher.
• One aspect is the use of a low conductivity aqueous solution in a wash step of a protein A chromatography for reducing the content of PLBL2 or Clusterin wherein the protein A chromatography is used to purify a human IgG4 or IgG1 isotype antibody and wherein the low conductivity aqueous solution has a conductivity value of about 0.5 mS/cm or less and a pH of about 7 or higher.
• the antibody is an IgG4 isotype antibody, e.g., an antibody against P-selectin, or a bispecific antibody against factor IXa and factor X, or an antibody against IL-13, or an antibody against amyloid beta.
• the antibody is a IgG1 isotype antibody, e.g., an antibody against Influenza B, or an antibody against VEGF-A, or an antibody against CD22, or a bispecific antibody against HER3 and EGFR, or an antibody against amyloid beta, or an antibody against Her2, or a bispecific antibody against Ang2 and VEGF-A, or a bispecific antibody against carcinoembryonic antigen (CEA) and CD3.
• IgG1 isotype antibody e.g., an antibody against Influenza B, or an antibody against VEGF-A, or an antibody against CD22, or a bispecific antibody against HER3 and EGFR, or an antibody against amyloid beta, or an antibody against Her2, or a bispecific antibody against Ang2 and VEGF-A, or a bispecific antibody against carcinoembryonic antigen (CEA) and CD3.
• IgG1 isotype antibody e.g., an antibody against Influenza B, or an antibody against VEGF-A
• the present disclosure provides a method for producing a human IgG4 or IgG1 isotype antibody comprising
• the present disclosure provides a method for producing a human IgG4 or IgG1 isotype antibody comprising
• the present disclosure provides a method for purifying a human IgG4 or IgG1 isotype antibody from a sample comprising the steps of
• the present disclosure provides a method for purifying a human IgG4 or IgG1 isotype antibody from a sample comprising the steps of
• the present disclosure provides a method for producing a human IgG4 isotype antibody comprising
• the present disclosure provides a method for purifying a human IgG4 isotype antibody from a sample comprising the steps of
• anti-P-selectin antibody and “an antibody that binds to P-selectin” or “antibody against P-selectin”refer to an antibody that is capable of binding P-selectin with sufficient affinity such that the antibody is useful as a diagnostic and/or therapeutic agent in targeting P-selectin.
• the extent of binding of an anti-P-selectin antibody to an unrelated, non-P-selectin protein is less than about 10% of the binding of the antibody to P-selectin as measured, e.g., by ELISA or surface plasmon resonance.
• an anti-P-selectin antibody binds to an epitope of P-selectin that is conserved among P-selectin from different species.
• antibody against factor IXa and factor X or “antibody against IL-13” or “antibody against amyloid beta” or the like.
• the antibody against P-selectin is inclacumab (IgG4 isotype) as described in WO 2005/100402 or SEQ ID NO: 07 to 12.
• the antibody is a bispecific antibody against factor IXa and factor X, e.g., anti-FIXa/X antibody (IgG4 isotype) as described in WO 2012/067176.
• the antibody is an antibody against Her2, e.g., trastuzumab (IgG1 isotype) as described in WO 1992/022653.
• the antibody is a bispecific antibody against angiopoietin 2 (Ang2) and vascular endothelial growth factor A (VEGF-A), e.g., vanucizumab (IgG1 isotype) as described in WO 2011/117329 or SEQ ID NO: 01 to 04.
• the antibody is an antibody against amyloid beta, e.g., gantenerumab (IgG1 isotype) as described in WO 2003/070760 or SEQ ID NO: 05 to 06, or crenezumab (IgG4 isotype).
• the antibody is an antibody against CD22, an antibody against IL13 (e.g., lebrikizumab), a bispecific antibody against Her3 and EGFR (e.g., duligotuzumab), an antibody against VEGF-A (e.g., bevacizumab), and an antibody against Influenza B.
• IL13 e.g., lebrikizumab
• a bispecific antibody against Her3 and EGFR e.g., duligotuzumab
• an antibody against VEGF-A e.g., bevacizumab
• Influenza B e.g., bevacizumab
• VEGF or VEGF-A can be used interchangeably herein.
• binding refers to the binding of the antibody to an epitope of the antigen in an in-vitro assay, preferably in a surface plasmon resonance assay (SPR, BIAcore, GE-Healthcare Uppsala, Sweden).
• the affinity of the binding is defined by the terms ka (rate constant for the association of the antibody from the antibody/antigen complex), k d (dissociation constant), and K D (k d /k a ).
• Binding or specifically binding means a binding affinity (K D ) of 10 ⁇ 7 mol/L or less.
• antibody herein is used in the broadest sense and encompasses various antibody structures, including but not limited to monoclonal antibodies, polyclonal antibodies, multispecific antibodies (e.g., bispecific antibodies), and antibody fragments so long as they exhibit the desired antigen-binding activity.
• antibody fragment refers to a molecule other than an intact antibody that comprises a portion of an intact antibody that binds the antigen to which the intact antibody binds.
• antibody fragments include but are not limited to Fv, Fab, Fab′, Fab′-SH, F(ab′) 2 ; diabodies; linear antibodies; single-chain antibody molecules (e.g. scFv); and multispecific antibodies formed from antibody fragments.
• a Fab fragment is an antibody fragment obtained by a papain digestion of a (full length/complete) antibody.
• Bispecific antibodies are antibodies which have two different antigen-binding specificities.
• the term “bispecific” antibody as used herein denotes an antibody that has at least two binding sites each of which bind to different epitopes.
• chimeric antibody refers to an antibody in which a portion of the heavy and/or light chain is derived from a particular source or species, while the remainder of the heavy and/or light chain is derived from a different source or species.
• the “class” of an antibody refers to the type of constant domain or constant region possessed by its heavy chain.
• the heavy chain constant domains that correspond to the different classes of immunoglobulins are called ⁇ , ⁇ , ⁇ , ⁇ , and ⁇ , respectively.
• human IgG isotype antibody denotes an antibody that comprises a constant region that is derived from a human wild-type IgG isotype, i.e. for example it may comprise a constant region derived from a human IgG isotype with a mutation, e.g. an P329G mutation (numbering according to Kabat).
• human IgG4 isotype antibody denotes an antibody that comprises a constant region that is derived from a human wild-type IgG4 isotype, i.e. for example it may comprise a constant region derived from a human IgG4 isotype with a mutation, e.g. an an P329G mutation and/or S228P, L235E mutation (numbering according to Kabat).
• Fc-region herein is used to define a C-terminal region of an immunoglobulin heavy chain that contains at least a portion of the constant region.
• the term includes native sequence Fc-regions and variant Fc-regions.
• a human IgG heavy chain Fc-region extends from Cys226, or from Pro230, to the carboxyl-terminus of the heavy chain.
• the C-terminal lysine (Lys447) or the C-terminal glycyl-lysine dipeptide (Gly446Lys447) of the Fc-region may or may not be present.
• EU numbering system also called the EU index, as described in Kabat, E. A. et al., Sequences of Proteins of Immunological Interest, 5th ed., Public Health Service, National Institutes of Health, Bethesda, Md. (1991), NIH Publication 91-3242.
• “Framework” or “FR” refers to variable domain residues other than hypervariable region (HVR) residues.
• the FR of a variable domain generally consists of four FR domains: FR1, FR2, FR3, and FR4. Accordingly, the HVR and FR sequences generally appear in the following sequence in VH (or VL): FR1-H1(L1)-FR2-H2(L2)-FR3-H3(L3)-FR4.
• host cell refers to cells into which exogenous nucleic acid has been introduced, including the progeny of such cells.
• Host cells include “transformants” and “transformed cells,” which include the primary transformed cell and progeny derived therefrom without regard to the number of passages. Progeny may not be completely identical in nucleic acid content to a parent cell, but may contain mutations. Mutant progeny that have the same function or biological activity as screened or selected for in the originally transformed cell are included herein.
• the term “cell” includes cells which are used for the expression of nucleic acids.
• the host cell is a CHO cell (e.g.
• the cell is a CHO cell, or a BHK cell, or a PER.C6® cell.
• the expression “cell” includes the subject cell and its progeny.
• washing denotes the applying of a solution to an affinity chromatography material in order to remove non specifically bound polypeptides and non-polypeptide compounds from the chromatography material, especially to remove host cell protein and host cell DNA.
• the term “washing” does not encompass the elution of bound material from an affinity chromatography material.
• affinity chromatography with microbial proteins e.g. protein A or protein G affinity chromatography
• affinity chromatographie with a recombinant protein as ligand e.g. single chain Fv as ligand, e.g. Kappa select
• ligand e.g. single chain Fv as ligand, e.g. Kappa select
• ion exchange chromatography e.g. cation exchange (carboxymethyl resins), anion exchange (amino ethyl resins) and mixed-mode exchange
• thiophilic adsorption e.g. with beta-mercaptoethanol and other SH ligands
• hydrophobic interaction or aromatic adsorption chromatography e.g.
• protein A denotes a protein A polypeptide either obtained from a natural source or produced synthetically.
• protein A chromatography material denotes an inert solid phase to which a protein A is covalently linked.
• the protein A chromatography material is selected from MabSelectSure, ProSep vA, Mab Capture A, ProSep Ultra Plus, Mab Select, Mab Select Xtra, Poros A, or ProSep A.
• high conductivity aquaeous solution denotes an aquaeous solution with a high conductivity value.
• the conductivity value may be about 20 mS/cm or higher.
• medium conductivity aquaeous solution denotes an aquaeous solution with a medium conductivity value.
• the conductivity value may be more than 0.5 mS/cm to less than 20 mS/cm.
• low conductivity aquaeous solution denotes an aquaeous solution with a low conductivity value.
• the conductivity value may be about 0.5 mS/cm or less.
• the conductivity value may be about 1.2 mS/cm or less, if the pH is about 8.5 or higher.
• the conductivity values can be determined by standard methods known to the person skilled in the art.
• variable heavy chain domain VH of ⁇ VEGF> SEQ ID NO: 02 variable light chain domain VL of ⁇ VEGF>
• 07 variable heavy chain domain VH1 of anti-P-selectin antibody SEQ ID NO: 08 variable heavy chain domain VH2 of anti-P-selectin antibody
• the current invention is exemplified using a number of exemplary antibodies, including: an antibody against P-selectin (anti-P-selectin antibody; inclacumab; IgG4 isotype) as described in WO 2005/100402 or SEQ ID NO: 07 to SEQ ID NO: 12; a bispecific antibody against factor IXa and factor X (anti-FIXa/X antibody; IgG4 isotype) as described in WO 2012/067176; with an antibody against Her2; a bispecific antibody against Ang2 and VEGF-A (anti-Ang2/VEGF-A antibody; vanucizumab; IgG1 isotype) as described in WO 2011/117329 or SEQ ID NO: 01 to SEQ ID NO: 04; an antibody against amyloid beta (anti-amyloid beta antibody; gantenerumab; IgG1 isotype) as described in WO 2003/070760 or SEQ ID NO: 05 to SEQ ID NO: 06. Also included herein
• HCP Host Cell Protein
• PLBL2 Phospholipase B-like 2 Protein
• the residual CHO HCP content in process samples is determined by an electrochemiluminescence immunoassay (ECLIA) on cobas e 411 immunoassay analyzer (Roche Diagnostics).
• ECLIA electrochemiluminescence immunoassay
• the assay is based on a sandwich principle using polyclonal anti-CHO HCP antibody from sheep.
• CHO HCP Chinese hamster ovary host cell protein
• Second incubation After addition of polyclonal CHO HCP-specific antibody labeled with ruthenium complex (Tris(2,2′-bipyridyl)ruthenium(II)-complex) a ternary sandwich complex is formed on the microparticles.
• ruthenium complex Tris(2,2′-bipyridyl)ruthenium(II)-complex
• the reaction mixture is aspirated into the measuring cell where the microparticles are magnetically captured onto the surface of the electrode. Unbound substances are then removed in a washing step. Application of a voltage to the electrode then induces chemiluminescent emission which is measured by a photomultiplier.
• the concentration of CHO HCP in the test sample is finally calculated from a CHO
• the residual Chinese hamster ovary (CHO) Phospholipase B-like 2 protein (PLBL2) content in process samples is determined by an electrochemiluminescence immunoassay (ECLIA) on cobas e 411 immunoassay analyzer (Roche Diagnostics).
• ELIA electrochemiluminescence immunoassay
• the assay is based on a sandwich principle using monoclonal anti-CHO PLBL2 antibody from mouse.
• CHO PLBL2 from 30 ⁇ L sample (neat and/or diluted), biotin labeled monoclonal CHO PLBL2-specific antibody, and a monoclonal CHO PLBL2-specific antibody labeled with a ruthenium complex (Tris(2,2′-bipyridyl)ruthenium(II)-complex) form a sandwich complex.
• a ruthenium complex Tris(2,2′-bipyridyl)ruthenium(II)-complex
• the ternary complex becomes bound to the solid phase via interaction of biotin and streptavidin.
• the reaction mixture is aspirated into the measuring cell where the microparticles are magnetically captured onto the surface of the electrode. Unbound substances are then removed in a washing step. Application of a voltage to the electrode then induces chemiluminescence, which is measured by a photomultiplier.
• the concentration of CHO PLBL2 in the test sample is finally calculated from a CHO PLBL2 standard curve of known concentration.
• the residual Clusterin content in process samples is determined by a commercial assay from Merck Millipore (GyroMark HT Kit GYRCLU-37K) which was used according to the manufacturer's instructions.
• this assay is a Sandwich ELISA based, sequentially, on:
• Antibody Anti-P-Selectin
• a solution containing an anti-P-Selectin antibody was applied to a Protein A affinity column after equilibration (step 1) of the column.
• Initial load of PLBL2 determined in solution containing an anti-P-Selectin antibody: 335 ng PLBL2/mg of antibody.
• Initial load of Clusterin determined in solution containing an anti-P-Selectin antibody: 2874.8 ng Clusterin/mg of antibody.
• Initial load of CHOP determined in solution containing an anti-P-Selectin antibody 100971 ng CHOP/mg of antibody.
• Step 2 Load of antibody containing solution
• Step 1 Equilibration: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 3 Wash I: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 4 Wash II: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 7 Elution: 50 mM acetic acid, pH 4.0 b) low conductivity wash (with Tris buffer only)
• Step 1 Equilibration: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 3 Wash I: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 4 Wash II: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 5 Wash III: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 6 Wash IV: 2 mM Tris, pH 8.0
• Step 7 Elution: 50 mM acetic acid, pH 4.0 c) low conductivity wash (with potassium phosphate (KP) only)
• Step 1 Equilibration: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 3 Wash I: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 4 Wash II: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 5 Wash III: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 6 Wash IV: 0.5 mM potassium phosphate, pH 8.0
• Step 7 Elution: 50 mM acetic acid, pH 4.0 d) high conductivity wash (with Tris buffer only)
• Step 1 Equilibration: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 3 Wash I: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 4 Wash II: 700 mM Tris, pH 7.2
• Step 5 Wash III: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 7 Elution: 50 mM acetic acid, pH 4.0 e) low conductivity wash (with Tris buffer only; pH 6.0)
• Step 1 Equilibration: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 3 Wash I: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 4 Wash II: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 5 Wash III: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 6 Wash IV: 2 mM Tris, pH 6.0
• Step 7 Elution: 50 mM acetic acid, pH 4.0 f) high conductivity wash (with Histidine (His)/Tris buffer only)
• Step 1 Equilibration: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 3 Wash I: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 4 Wash II: 200 mM His/1000 mM Tris, pH 7.0
• Step 5 Wash III: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 7 Elution: 50 mM acetic acid, pH 4.0 g) low conductivity Tris +high conductivity Histidine (His)/Tris
• Step 1 Equilibration: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 3 Wash I: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 4 Wash II: 200 mM His/1000 mM Tris, pH 7.0
• Step 5 Wash III: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 6 Wash IV: 2 mM Tris, pH 8.0
• Step 7 Elution: 50 mM acetic acid, pH 4.0 h) low conductivity potassium phosphate (KP)+high conductivity Histidine (His)/Tris
• Step 1 Equilibration: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 3 Wash I: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 4 Wash II: 200 mM His/1000 mM Tris, pH 7.0
• Step 5 Wash III: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 6 Wash IV: 0.5 mM potassium phosphate, pH 8.0
• Step 7 Elution: 50 mM acetic acid, pH 4.0 i) low conductivity Tris+high conductivity Tris
• Step 1 Equilibration: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 3 Wash I: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 4 Wash II: 700 mM Tris, pH 7.2
• Step 5 Wash III: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 6 Wash IV: 2 mM Tris, pH 8.0
• Step 7 Elution: 50 mM acetic acid, pH 4.0 j) low conductivity Tris; pH 6.0+high conductivity Tris
• Step 1 Equilibration: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 3 Wash I: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 4 Wash II: 700 mM Tris, pH 7.2
• Step 5 Wash III: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 6 Wash IV: 2 mM Tris, pH 6.0
• Step 7 Elution: 50 mM acetic acid, pH 4.0
• Antibody anti-amyloid beta.
• Step 1 Equilibration: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 3 Wash I: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 4 Wash II: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 7 Elution: 50 mM acetic acid, pH 4.0 b) low conductivity wash (with Tris buffer only)
• Step 1 Equilibration: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 3 Wash I: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 4 Wash II: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 5 Wash III: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 6 Wash IV: 2 mM Tris, pH 8.0
• Step 7 Elution: 50 mM acetic acid, pH 4.0 c) high conductivity wash (with Tris buffer only)
• Step 1 Equilibration: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 3 Wash I: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 4 Wash II: 700 mM Tris, pH 7.2
• Step 5 Wash III: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 7 Elution: 50 mM acetic acid, pH 4.0 d) low conductivity Tris+high conductivity Histidine (His)/Tris
• Step 1 Equilibration: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 3 Wash I: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 4 Wash II: 200 mM His/1000 mM Tris, pH 7.0
• Step 5 Wash III: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 6 Wash IV: 2 mM Tris, pH 8.0
• Step 7 Elution: 50 mM acetic acid, pH 4.0
• Antibody anti-Her2
• Step 1 Equilibration: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 3 Wash I: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 4 Wash II: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 7 Elution: 50 mM acetic acid, pH 4.0 b) low conductivity wash (with Tris buffer only)
• Step 1 Equilibration: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 3 Wash I: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 4 Wash II: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 5 Wash III: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 6 Wash IV: 2 mM Tris, pH 8.0
• Step 7 Elution: 50 mM acetic acid, pH 4.0 c) high conductivity wash (with Tris buffer only)
• Step 1 Equilibration: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 3 Wash I: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 4 Wash II: 700 mM Tris, pH 7.2
• Step 5 Wash III: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 7 Elution: 50 mM acetic acid, pH 4.0 d) low conductivity Tris+high conductivity Histidine (His)/Tris
• Step 1 Equilibration: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 3 Wash I: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 4 Wash II: 200 mM His/1000 mM Tris, pH 7.0
• Step 5 Wash III: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 6 Wash IV: 2 mM Tris, pH 8.0
• Step 7 Elution: 50 mM acetic acid, pH 4.0
• Antibody anti-Ang2/VEGF-A
• Step 1 Equilibration: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 3 Wash I: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 4 Wash II: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 7 Elution: 50 mM acetic acid, pH 4.0 b) low conductivity wash (with Tris buffer only)
• Step 1 Equilibration: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 3 Wash I: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 4 Wash II: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 5 Wash III: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 6 Wash IV: 2 mM Tris, pH 8.0
• Step 7 Elution: 50 mM acetic acid, pH 4.0 c) high conductivity wash (with Tris buffer only)
• Step 1 Equilibration: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 3 Wash I: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 4 Wash II: 700 mM Tris, pH 7.2
• Step 5 Wash III: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 7 Elution: 50 mM acetic acid, pH 4.0 d) low conductivity Tris+high conductivity Histidine (His)/Tris
• Step 1 Equilibration: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 3 Wash I: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 4 Wash II: 200 mM His/1000 mM Tris, pH 7.0
• Step 5 Wash III: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 6 Wash IV: 2 mM Tris, pH 8.0
• Step 7 Elution: 50 mM acetic acid, pH 4.0
• HCP total PLBL2 Clusterin Yield Run [ng/mg] [ng/mg] [ng/mg] [%] a 3035 1.0 n.d. 85.0 b 1707 0.8 n.d. 79.8 c 655 0.7 n.d. 52 d 1050 0.8 n.d. 92.3
• Antibody anti-FIXa/X
• Step 1 Equilibration: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 3 Wash I: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 4 Wash II: 700 mM Tris, pH 7.2
• Step 5 Wash III: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 7 Elution: 50 mM acetic acid, pH 4.0 b) low conductivity Tris+high conductivity Histidine (His)/Tris
• Step 1 Equilibration: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 3 Wash I: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 4 Wash II: 200 mM His/1000 mM Tris, pH 7.0
• Step 5 Wash III: 25 mM Tris, 25 mM NaCl, pH 7.0
• Step 6 Wash IV: 2 mM Tris, pH 8.0
• Step 7 Elution: 50 mM acetic acid, pH 4.0
• a solution containing an anti-FIXa/X antibody was applied to a Protein A affinity column after equilibration (step 1) of the column.
• Step 2 Load of antibody containing solution
• Step 1 Equilibration: 20 mM NaPO4, pH 7.5
• Step 3 Wash I: 450 mM NaSO4, 20 mM NaAc, pH 4.8
• Step 4 Wash II: 20 mM NaPO4, pH 7.5
• Step 6 Elution: 35 mM acetic acid, pH 4.0 b) low conductivity wash (Tris 1 mM)+high conductivity wash (with NaSO4)
• Step 1 Equilibration: 20 mM NaPO4, pH 7.5
• Step 3 Wash I: 450 mM NaSO4, 20 mM NaAc, pH 4.8
• Step 4 Wash II: 20 mM NaPO4, pH 7.5
• Step 5 Wash III: 1 mM Tris, pH 8.0
• Step 6 Elution: 50 mM acetic acid, pH 4.0 c) low conductivity wash (Tris 2 mM)+high conductivity wash (with NaSO4)
• Step 1 Equilibration: 20 mM NaPO4, pH 7.5
• Step 3 Wash I: 450 mM NaSO4, 20 mM NaAc, pH 4.8
• Step 4 Wash II: 20 mM NaPO4, pH 7.5
• Step 5 Wash III: 2 mM Tris, pH 8.0
• Step 6 Elution: 35 mM acetic acid, pH 4.0 d) low conductivity wash (Tris 4 mM)+high conductivity wash (with NaSO4)
• Step 1 Equilibration: 20 mM NaPO4, pH 7.5
• Step 3 Wash I: 450 mM NaSO4, 20 mM NaAc, pH 4.8
• Step 4 Wash II: 20 mM NaPO4, pH 7.5
• Step 5 Wash III: 4 mM Tris, pH 8.0
• Step 6 Elution: 50 mM acetic acid, pH 4.0 e) low conductivity wash (Tris 6 mM)+high conductivity wash (with NaSO4)
• Step 1 Equilibration: 20 mM NaPO4, pH 7.5
• Step 3 Wash I: 450 mM NaSO4, 20 mM NaAc, pH 4.8
• Step 4 Wash II: 20 mM NaPO4, pH 7.5
• Step 5 Wash III: 6 mM Tris, pH 8.0
• Step 6 Elution: 50 mM acetic acid, pH 4.0 f) low conductivity wash (Tris 4 mM, pH 7.8)+high conductivity wash (with NaSO4)
• Step 1 Equilibration: 20 mM NaPO4, pH 7.5
• Step 3 Wash I: 450 mM NaSO4, 20 mM NaAc, pH 4.8
• Step 4 Wash II: 20 mM NaPO4, pH 7.5
• Step 5 Wash III: 4 mM Tris, pH 7.8
• Step 6 Elution: 50 mM acetic acid, pH 4.0 g) low conductivity wash (Tris 4 mM, pH 8.2)+high conductivity wash (with NaSO4)
• Step 1 Equilibration: 20 mM NaPO4, pH 7.5
• Step 3 Wash I: 450 mM NaSO4, 20 mM NaAc, pH 4.8
• Step 4 Wash II: 20 mM NaPO4, pH 7.5
• Step 5 Wash III: 4 mM Tris, pH 8.2
• Step 6 Elution: 50 mM acetic acid, pH 4.0 h) low conductivity wash (Tris 2 mM)+high conductivity wash (with Histidine (His)/Tris 1 M)
• Step 1 Equilibration: 20 mM NaPO4, pH 7.5
• Step 3 Wash I: 200 mM His/1000 mM Tris, pH 7.0
• Step 4 Wash II: 20 mM NaPO4, pH 7.5
• Step 5 Wash III: 2 mM Tris, pH 8.0
• Step 6 Elution: 35 mM acetic acid, pH 4.0 i) low conductivity wash (Tris 2 mM)+high conductivity wash (Histidine (His)/Tris 0.85 M)
• Step 1 Equilibration: 20 mM NaPO4, pH 7.5
• Step 3 Wash I: 200 mM His/850 mM Tris, pH 7.0
• Step 4 Wash II: 20 mM NaPO4, pH 7.5
• Step 5 Wash III: 2 mM Tris, pH 8.0
• Step 6 Elution: 50 mM acetic acid, pH 4.0 j) low conductivity wash (Tris 2 mM)+high conductivity wash (Histidine (His)/Tris 0.7 M)
• Step 1 Equilibration: 20 mM NaPO4, pH 7.5
• Step 3 Wash I: 200 mM His/700 mM Tris, pH 7.0
• Step 4 Wash II: 20 mM NaPO4, pH 7.5
• Step 5 Wash III: 2 mM Tris, pH 8.0
• Step 6 Elution: 50 mM acetic acid, pH 4.0 k) low conductivity wash (Tris 2 mM)+high conductivity wash (Histidine (His)/Tris 0.55 M)
• Step 1 Equilibration: 20 mM NaPO4, pH 7.5
• Step 3 Wash I: 200 mM His/550 mM Tris, pH 7.0
• Step 4 Wash II: 20 mM NaPO4, pH 7.5
• Step 5 Wash III: 2 mM Tris, pH 8.0
• Step 6 Elution: 50 mM acetic acid, pH 4.0
• Null harvested cell culture fluid was produced using non-transfected CHO-DP12 cells cultured in serum-free media. Fermentation was performed at the 2 L-scale using a representative cell culture process. At the end of 14 days of fermentation, cell culture fluid was harvested via centrifugation and sterile filtration. This harvested cell culture fluid (HCCF) was then stored at ⁇ 70° C. until experimentation.
• HCCF harvested cell culture fluid
• Recombinant CHO PLBL2 with a C-terminal hexahistidine-tag was expressed in 35 L-scale transient transfections and purified from harvested cell culture fluid as previously described (Vanderlaan et al., 2015). Purified PLBL2 was then formulated in a PBS solution and stored at ⁇ 70° C. until experimentation.
• Recombinant humanized antibodies were expressed in CHO cells and purified using column chromatography to ensure PLBL2 concentration was below 20 ng/mg. Prior to beginning each study, each antibody was buffer-exchanged into PBS using PD-10 desalting columns (GE Healthcare).
• purified antibodies were diluted to the same concentration with PBS and spiked into HCCF from a non-producing cell line to give a final antibody titer of 5 g/L.
• a control was also prepared wherein PBS was added instead of the purified antibody to evaluate non-specific host cell protein binding to the Protein A resin in the absence of antibody.

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