Comparison of ceramic hydroxy- and fluoroapatite versus Protein A/G-based resins in the isolation of a recombinant human antibody from cell culture supernatant

Title data

Schubert, Sven ; Freitag, Ruth:
Comparison of ceramic hydroxy- and fluoroapatite versus Protein A/G-based resins in the isolation of a recombinant human antibody from cell culture supernatant.
In: Journal of Chromatography A. Vol. 1142 (2007) Issue 1 . - pp. 106-113.
ISSN 0021-9673
DOI: https://doi.org/10.1016/j.chroma.2006.08.075

Official URL:

Abstract in another language

A recombinant human antibody (IgG1-subtype) was produced in Chinese Hamster Ovary (CHO) cells. Alternatives to the established isolation by Protein A affinity chromatography were investigated. Neither an alternative elution agent (Arginine) nor an alternative affinity ligand (Protein G) resulted in an improvement in yield and/or purity. Subsequently, apatite stationary phases including a novel ceramic fluoroapatite material were tested. By applying a double gradient (first 0 to 1 M NaCl, then 0.01 to 0.4 M phosphate) the culture supernatant was separated into three fractions: the flow through, which contained no active antibody, the NaCl-eluate, which contained the antibody and no other discernible protein contaminants, and a fraction that eluted in the phosphate gradient and contained several proteins, but no active antibody. In case of the hydroxyapatite, retention of the antibody decreased and yield increased when the pH was raised from 6.0 to 8.2 (isoelectric point (pI) of the antibody: 8.3), to reach a yield of 71 at pH of 8.2. In case of the fluoroapatite, retention was also found to increase with increasing mobile phase pH, but the yields went through a maximum (of ca. 90) at a mobile phase pH of 7.0. No traces of contaminants were seen in the corresponding gel. This is the first time that yields of 90 and such high purities have been reported as the result of a single chromatographic step for the antibody in question with either (Protein A) affinity or apatite chromatography.

Further data

Item Type:	Article in a journal
Refereed:	Yes
Additional notes:	19th International Symposium on Preparative and Process ChromatographyIon Exchange, Adsorption/Desorption Processes and Related Separation Techniques
Keywords:	Protein A
Institutions of the University:	Faculties > Faculty of Engineering Science Faculties > Faculty of Engineering Science > Chair Process Biotechnology Faculties > Faculty of Engineering Science > Chair Process Biotechnology > Chair Process Biotechnology - Univ.-Prof. Dr. Ruth Freitag Faculties
Result of work at the UBT:	Yes
DDC Subjects:	500 Science 500 Science > 500 Natural sciences 600 Technology, medicine, applied sciences 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited:	24 Feb 2016 15:45
Last Modified:	30 Jun 2022 10:17
URI:	https://eref.uni-bayreuth.de/id/eprint/31049