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Efficient bispecific monoclonal antibody purification using gradient thiophilic affinity chromatography
F T Kreutz1, D S Wishart, M R Suresh
1Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, Canada.
Journal of Chromatography. B, Biomedical Sciences and Applications
|October 10, 1998
Summary
A novel single-step thiophilic chromatography method efficiently purifies bispecific monoclonal antibodies (bsMAbs) from monospecific forms. This cost-effective technique offers improved yield and purity for therapeutic applications.
Area of Science:
- Biotechnology
- Immunology
- Protein Chemistry
Background:
- Bispecific monoclonal antibodies (bsMAbs) offer versatile applications in immunotherapy and immunodiagnostics.
- Production of bsMAbs using hybrid-hybridomas often results in co-purification of undesired parental monospecific antibodies.
- Existing purification methods for bsMAbs are often multi-step, limiting purity and yield.
Purpose of the Study:
- To develop a simple, single-step purification method for bsMAbs.
- To overcome limitations of current purification techniques regarding purity and yield.
- To investigate the mechanism of bsMAb separation using the novel method.
Main Methods:
- Development and application of a single-step purification protocol utilizing thiophilic chromatography.
- Analysis of bsMAb and monospecific antibody separation.
- Investigation of amino acid sequences and heavy chain assembly to elucidate the separation mechanism.
Main Results:
- Successful single-step purification of bsMAbs from a mixture of monospecific antibodies.
- Demonstration of a potentially scalable and cost-effective purification technique.
- Proposed mechanism for the resolution of bsMAbs from monospecific species based on molecular characteristics.
Conclusions:
- Thiophilic chromatography presents a simple, efficient, and potentially scalable method for purifying bsMAbs.
- This approach addresses a key limitation in bsMAb production, improving accessibility for therapeutic and diagnostic use.
- Understanding the separation mechanism provides insights into bsMAb structure-function relationships.