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A Combined Ultrafiltration/Diafiltration Step Facilitates the Purification of Cyanovirin-N From Transgenic Tobacco Extracts

The production of biopharmaceutical proteins in plants offers many advantages over traditional expression platforms, including improved safety, greater scalability and lower upstream production costs. However, most products are retained within plant cells or the apoplastic space instead of being sec...

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Autores principales: Opdensteinen, Patrick, Clodt, Juliana I., Müschen, Catherine R., Filiz, Volkan, Buyel, Johannes F.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6334625/
https://www.ncbi.nlm.nih.gov/pubmed/30687700
http://dx.doi.org/10.3389/fbioe.2018.00206
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author Opdensteinen, Patrick
Clodt, Juliana I.
Müschen, Catherine R.
Filiz, Volkan
Buyel, Johannes F.
author_facet Opdensteinen, Patrick
Clodt, Juliana I.
Müschen, Catherine R.
Filiz, Volkan
Buyel, Johannes F.
author_sort Opdensteinen, Patrick
collection PubMed
description The production of biopharmaceutical proteins in plants offers many advantages over traditional expression platforms, including improved safety, greater scalability and lower upstream production costs. However, most products are retained within plant cells or the apoplastic space instead of being secreted into a liquid medium, so downstream processing necessarily involves tissue and cell disruption followed by the removal of abundant particles and host cell proteins (HCPs). We investigated whether ultrafiltration/diafiltration (UF/DF) can simplify the purification of the model recombinant protein cyanovirin-N (CVN), an ~ 11 kDa HIV-neutralizing lectin, from tobacco extracts prior to chromatography. We compared different membrane types and process conditions, and found that at pH 8.0 and 50 mS cm(−1) an UF step using a 100 kDa regenerated cellulose membrane removed more than 80% of the ~ 0.75 mg mL(−1) total soluble protein present in the clarified plant extract. We recovered ~ 70% of the CVN and the product purity increased ~ 3-fold in the permeate. The underlying effects of tobacco HCP retention during the UF/DF step were investigated by measuring the zeta potential and particle size distribution in the 2–10,000 nm range. Combined with a subsequent 10 kDa DF step, this approach simultaneously reduced the process volume, conditioned the process intermediate, and facilitated early, chromatography-free purification. Due to the generic, size-based nature of the method, it is likely to be compatible with most products smaller than ~50 kDa.
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spelling pubmed-63346252019-01-25 A Combined Ultrafiltration/Diafiltration Step Facilitates the Purification of Cyanovirin-N From Transgenic Tobacco Extracts Opdensteinen, Patrick Clodt, Juliana I. Müschen, Catherine R. Filiz, Volkan Buyel, Johannes F. Front Bioeng Biotechnol Bioengineering and Biotechnology The production of biopharmaceutical proteins in plants offers many advantages over traditional expression platforms, including improved safety, greater scalability and lower upstream production costs. However, most products are retained within plant cells or the apoplastic space instead of being secreted into a liquid medium, so downstream processing necessarily involves tissue and cell disruption followed by the removal of abundant particles and host cell proteins (HCPs). We investigated whether ultrafiltration/diafiltration (UF/DF) can simplify the purification of the model recombinant protein cyanovirin-N (CVN), an ~ 11 kDa HIV-neutralizing lectin, from tobacco extracts prior to chromatography. We compared different membrane types and process conditions, and found that at pH 8.0 and 50 mS cm(−1) an UF step using a 100 kDa regenerated cellulose membrane removed more than 80% of the ~ 0.75 mg mL(−1) total soluble protein present in the clarified plant extract. We recovered ~ 70% of the CVN and the product purity increased ~ 3-fold in the permeate. The underlying effects of tobacco HCP retention during the UF/DF step were investigated by measuring the zeta potential and particle size distribution in the 2–10,000 nm range. Combined with a subsequent 10 kDa DF step, this approach simultaneously reduced the process volume, conditioned the process intermediate, and facilitated early, chromatography-free purification. Due to the generic, size-based nature of the method, it is likely to be compatible with most products smaller than ~50 kDa. Frontiers Media S.A. 2019-01-09 /pmc/articles/PMC6334625/ /pubmed/30687700 http://dx.doi.org/10.3389/fbioe.2018.00206 Text en Copyright © 2019 Opdensteinen, Clodt, Müschen, Filiz and Buyel. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Bioengineering and Biotechnology
Opdensteinen, Patrick
Clodt, Juliana I.
Müschen, Catherine R.
Filiz, Volkan
Buyel, Johannes F.
A Combined Ultrafiltration/Diafiltration Step Facilitates the Purification of Cyanovirin-N From Transgenic Tobacco Extracts
title A Combined Ultrafiltration/Diafiltration Step Facilitates the Purification of Cyanovirin-N From Transgenic Tobacco Extracts
title_full A Combined Ultrafiltration/Diafiltration Step Facilitates the Purification of Cyanovirin-N From Transgenic Tobacco Extracts
title_fullStr A Combined Ultrafiltration/Diafiltration Step Facilitates the Purification of Cyanovirin-N From Transgenic Tobacco Extracts
title_full_unstemmed A Combined Ultrafiltration/Diafiltration Step Facilitates the Purification of Cyanovirin-N From Transgenic Tobacco Extracts
title_short A Combined Ultrafiltration/Diafiltration Step Facilitates the Purification of Cyanovirin-N From Transgenic Tobacco Extracts
title_sort combined ultrafiltration/diafiltration step facilitates the purification of cyanovirin-n from transgenic tobacco extracts
topic Bioengineering and Biotechnology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6334625/
https://www.ncbi.nlm.nih.gov/pubmed/30687700
http://dx.doi.org/10.3389/fbioe.2018.00206
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