| Adsorptive refolding of a highly disulfide-bonded inclusion body protein using anion-exchange chromatography. | |
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MedLine Citation:
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PMID: 19419725 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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alpha-Fetoprotein (AFP) is a prospective biopharmaceutical candidate currently undergoing advanced-stage clinical trials for autoimmune indications. The high AFP expression yields in the form of inclusion bodies in Escherichia coli renders the inclusion body route potentially advantageous for process scale commercial manufacture, if high-throughput refolding can be achieved. This study reports the successful development of an 'anion-exchange chromatography'-based refolding process for recombinant human AFP (rhAFP), which carries the challenges of contaminant spectrum and molecule complexity. rhAFP was readily refolded on-column at rhAFP concentrations unachievable with dilution refolding due to viscosity and solubility constraints. DEAE-FF functioned as a refolding enhancer to achieve rhAFP refolding yield of 28% and product purity of 95% in 3h, at 1mg/ml protein refolding concentration. Optimization of both refolding and chromatography column operation parameters (i.e. resin chemistry, column geometry, redox potential and feed conditioning) significantly improved rhAFP refolding efficiency. Compared to dilution refolding, on-column rhAFP refolding productivity was 9-fold higher, while that of off-column refolding was more than an order of magnitude higher. Successful demonstration that a simple anion-exchange column can, in a single step, readily refold and purify semi-crude rhAFP comprising 16 disulfide bonds, will certainly extend the application of column refolding to a myriad of complex industrial inclusion body proteins. |
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Authors:
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Yu Chen; Susanna Su Jan Leong |
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Publication Detail:
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Type: Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't Date: 2009-04-18 |
Journal Detail:
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Title: Journal of chromatography. A Volume: 1216 ISSN: 1873-3778 ISO Abbreviation: J Chromatogr A Publication Date: 2009 Jun |
Date Detail:
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Created Date: 2009-05-20 Completed Date: 2009-07-01 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9318488 Medline TA: J Chromatogr A Country: Netherlands |
Other Details:
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Languages: eng Pagination: 4877-86 Citation Subset: IM |
Affiliation:
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School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adsorption Chromatography, Ion Exchange / methods* Disulfides / chemistry Escherichia coli / genetics, metabolism Gene Expression Humans Inclusion Bodies / chemistry*, genetics, metabolism Protein Folding Recombinant Proteins / chemistry, genetics, isolation & purification, metabolism alpha-Fetoproteins / chemistry*, genetics, isolation & purification, metabolism |
| Chemical | |
Reg. No./Substance:
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0/AFP protein, human; 0/Disulfides; 0/Recombinant Proteins; 0/alpha-Fetoproteins |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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