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Methods for the purification of polypeptide conjugates

a polypeptide and conjugate technology, applied in the field of polypeptide manufacturing, can solve problems such as unsuitable techniques

Inactive Publication Date: 2010-02-11
NOVO NORDISK AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides methods for isolating polypeptide conjugates that include a modifying group, such as a polymer. These methods involve using hydrophobic interaction chromatography (HIC) to separate the polypeptide conjugates from other components of a mixture. The methods are particularly useful for isolating polypeptide conjugates that include poly(alkylene oxide)-based polymers, such as poly(ethylene glycol) (PEG). The methods can be used on a large scale without using organic solvents, which are often associated with environmental concerns and can affect the stability of the purified polypeptide conjugates. The methods can also be used to isolate different glycoforms of a polypeptide conjugate. Overall, the invention provides efficient and effective methods for isolating polypeptide conjugates with improved purity.

Problems solved by technology

While reverse-phase (RP) chromatography can be used to purify polypeptides that are derivatized with such highly polar, water-soluble polymers, the technique is not desirable because it requires the use of water-soluble organic solvents, such as acetonitrile.

Method used

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  • Methods for the purification of polypeptide conjugates
  • Methods for the purification of polypeptide conjugates
  • Methods for the purification of polypeptide conjugates

Examples

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example 1

Development of a Purification Process for the Purification of GlycoPEGylated EPO using Hydrophobic Interaction Chromatography

[0292]This example describes the development of an isolation process for the isolation of EPO conjugates from a glycoPEGylation reaction mixture. The resulting process is characterized by high overall EPO conjugate recovery and produces the desired EPO conjugate [EPO-(SA-PEG-10 kDa)3] in high purity. The composition produced by the process is essentially free of other EPO-PEG glycoforms, such as mono-, di- and tetra-PEGylated EPO conjugates.

[0293]The desired EPO-PEG conjugate is a glycoPEGylated erythropoietin protein that contains three 10 kDa mPEG groups attached to each of the three monoantennary N-linked glycans. The EPO polypeptide is produced by expression of the protein from Sf9 cells using a Baculovirus infection protocol. The insect cell expression system produces EPO with three N-linked glycans, at Asn24, Asn38 and Asn83, each containing a trimannosy...

example 2

Large-Scale Purification of GlycoPEGylated EPO using Hydrophobic Interaction Chromatography

[0330]In order to further purify glycoPEGylated EPO from a glycoPEGylation reaction mixture, and to separate the trifunctionalized EPO species [EPO-(SA-PEG-10 kDa)3] from other PEGylated species (e.g., mono-, di- and tetra-PEGylated EPO species), the mixture (e.g., flowthrough from an anion chromatography medium) is subjected to hydrophobic interaction chromatography (HIC). An exemplary HIC procedure is outlined below: An XK26 column was packed with Phenyl 650S resin (106 mL, 2.6 cm×20 cm) and attached to an AKTA Explorer 100 system. Product elution was monitored by absorbance at 214, 254 and 280 nm. The column was equilibrated with 5 column volumes (CV) of Buffer B (25 mM sodium phosphate, 0.6 M sodium sulfate, pH 7.5)

[0331]The solution of Sartobind Q purified EPO-(SA-PEG-10 kDa)1-4 (62 mL, pH 6.94, 2.59 mS / cm) was adjusted to 0.6 M sodium sulfate by dilution with 62 mL of 1.2 M of buffer (1....

example 3

Preparation and Isolation of EPO-(SA-PEG-10 kDa)3 from a GlycoPEGylation Reaction Mixture

[0334]This example summarizes the results obtained with a 3 chromatography step (and two ultrafiltration / diafilatration (UF / DF) steps) purification process for the isolation of baculoviral derived, glycoPEGylated human erythropoietin EPO-(SA-PEG-10 kDa)3 (see, description of EPO-PEG conjugates in Example 1, above) at a 20 mg scale. Overall process efficiency and product quality were assessed.

[0335]The purification process (see e.g., FIG. 1) began with a Sartobind Q membrane used in a negative binding mode which allowed the PEG-EPO conjugates to flow through while capturing glycoPEGylation enzymes, such as MBP-GnT 1, MBP-GalT 1, MBP-SBD-ST3Gal3 and other enzyme contaminants. The various PEG species generated in the glycoPEGylation reaction were then fractionated using HIC on a Phenyl 650S resin (also compare Example 1), which enriched the EPO-(SA-PEG-10 kDa)3 to a concentration of >96% (step yiel...

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Abstract

The present invention provides processes for the manufacturing of polypeptide conjugates. In particular, the invention provides methods for the purification of polypeptide conjugates, which include at least one polymeric modifying groups, such as a poly(alkylene oxide) moiety. Exemplary poly(alkylene oxide) moieties include poly(ethylene glycol) (PEG) and poly(propylene glycol). In an exemplary process, hydrophobic interaction chromatography (HIC) is used to resolve different glycoforms of glycoPEGylated polypeptides.

Description

CROSS-REFERENCES TO RELATED APPLICATIONS[0001]The present application is a continuation of U.S. National Phase patent application Ser. No. 12 / 444,380 filed Apr. 3, 2009, which claims benefit of PCT Application No. PCT / US2007 / 080353 filed Oct. 3, 2007 and claims priority under 35 USC 119(e) to U.S. Provisional Patent Application No. 60 / 848,969, filed on Oct. 3, 2006, U.S. Provisional Patent Application No. 60 / 864,117, filed on Nov. 2, 2006; U.S. Provisional Patent Application No. 60 / 868,057, filed on Nov. 30, 2006; U.S. Provisional Patent Application No. 60 / 887,517, filed on Jan. 31, 2007; U.S. Provisional Patent Application No. 60 / 951,159, filed on Jul. 20, 2007; U.S. Provisional Patent Application No. 60 / 955,001, filed on Aug. 9, 2007; and U.S. Provisional Patent Application No. 60 / 956,468, filed Aug. 17, 2007, each of which is incorporated herein by reference in their entirety for all purposes.FIELD OF THE INVENTION[0002]The invention pertains to the field of polypeptide manufactu...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C12P21/00C07K14/00C07K14/575C07K14/54C12N9/96C07K14/62C07K14/605C07K16/00C07K14/555
CPCA61K47/48215C07K1/13C07K1/20Y10S930/09C07K14/505C12P21/005C07K14/00C07K1/18A61K47/60A61P7/00A61P7/06
Inventor DEFREES, SHAWNKINEALY, KYLE
Owner NOVO NORDISK AS
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