A Technique to Purify Monoclonal Antibodies Produced by Chinese Hamster Ovary Cells
Published: March 29, 2024
Abstract
Source: Velugula-Yellela, S. R., et al. Purification and Analytics of a Monoclonal Antibody from Chinese Hamster Ovary Cells Using an Automated Microbioreactor System. J. Vis. Exp. (2019).
This video demonstrates an assay for purifying monoclonal antibodies from cell culture fluid harvested from Chinese Hamster Ovarian cells. It employs a porous glass resin with immobilized protein A, which binds to the Fc region of the antibodies in the sample, effectively separating them from contaminants. The use of a low-pH elution buffer weakens the interaction, facilitating the retrieval of purified antibodies.
Protocol
1. Purification of antibody NOTE: The equilibration buffer for the in-house antibody is 25 mM Tris, 100 mM NaCl, pH 7.5. The elution buffer used is 0.1 M acetic acid. The buffers and resin (Protein A) are dependent on the specific antibody purified. Column volume is equivalent to the bed height of the resin. The amount of mobile phase used is determined in terms of column volume. Initializing the purification system Open the software at…
Divulgations
The authors have nothing to disclose.
Materials
| CHO DG44 Cell Line | Invitrogen | A1100001 | |
| Akta Avant 25 | General Electric Life Sciences | 28930842 | |
| Pro Sep vA Ultra Chromatography Resin | Millipore Sigma | 115115830 | Purification Stationary Phase |
| Omnifit 10cm Column | Diba Fluid Intelligence | 006EZ-06-10-AA | Housing for Stationary Phase |
| Tris Base | Fisher Scientific | BP154-1 | |
| Superloop 10 mL | GE Healthcare | 18-1113-81 | |
| µDawn Multi Angle Light Scattering Detector | Wyatt | WUDAWN-01 | |
| 0.22 µm Millex GV Filter Unit PVDF Membrane | Merck Millipore | SLGV033RB | |
| 10X Phosphate Buffered Saline | Corning | 46-013-CM | |
| 12 mL Syringe | Covidien | 8881512878 | |
| 50 mL Falcon tube | Corning Inc. | 352070 | |
| 96-Well Plate | Bio-Rad | 127737 | |
| Acetic Acid | Sigma-Aldrich | 695072 | |
| Amicon Ultra-4 100 kDa centrifugal filters | Merck Millipore | UFC810096 | |
| Amino Acid Standard, 1 nmol/µL | Agilent Technologies | 5061-3330 | |
| Amino Acid Supplement | Agilent Technologies | 5062-2478 | |
| Ammonium Formate Solution – Glycan Analysis | Waters Corporation | 186007081 | |
| Blue Screw Caps with Septa | Agilent Technologies | 5182-0717 | |
| Chromatography Water (MS Grade) | Fisher Chemical | W6-4 | |
| Hydrochloric Acid | Fisher Scientific | A144-500 | |
| Intact mAb Mass Check Standard | Waters Corporation | 186006552 | |
| Intrada Amino Acid Column 150 x 2 mm | Imtakt | WAA25 | |
| NanoDrop One Microvolume UV-Vis Spectrophotometer | Thermo Fisher Scientific | 840274100 |
Tags
Citer Cet Article
A Technique to Purify Monoclonal Antibodies Produced by Chinese Hamster Ovary Cells. J. Vis. Exp. (Pending Publication), e22095, doi: (2024).