Downstream processing of virus-like particles: Single-stage and multi-stage aqueous two-phase extraction

被引:60
作者
Effio, Christopher Ladd [1 ]
Wenger, Lukas [1 ]
Oetes, Ozan [1 ]
Oelmeier, Stefan A. [1 ,2 ]
Kneusel, Richard [3 ]
Hubbuch, Juergen [1 ]
机构
[1] Karlsruhe Inst Technol, Inst Proc Engn Life Sci, Sect Biomol Separat Engn 4, D-76021 Karlsruhe, Germany
[2] Boehringer Ingelheim Pharma GmbH & Co KG, Biberach, Germany
[3] Diarect AG, Freiburg, Germany
关键词
VLP; Aqueous two-phase systems; Centrifugal partition chromatography; High-throughput screening; DNA removal; Parvovirus; CENTRIFUGAL PARTITION CHROMATOGRAPHY; PARVOVIRUS B19 VACCINE; PROTEIN PRECIPITATION; MONOCLONAL-ANTIBODIES; POLYETHYLENE-GLYCOL; SURFACE-ANTIGEN; SMALL MOLECULES; INSECT CELLS; SCALE-UP; SYSTEMS;
D O I
10.1016/j.chroma.2015.01.007
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
The demand for vaccines against untreated diseases has enforced the research and development of virus-like particle (VLP) based vaccine candidates in recent years. Significant progress has been made in increasing VLP titres during upstream processing in bacteria, yeast and insect cells. Considering downstream processing, the separation of host cell impurities is predominantly achieved by time-intensive ultracentrifugation processes or numerous chromatography and filtration steps. In this work, we evaluate the potential of an alternative separation technology for VLPs: aqueous two-phase extraction (ATPE). The benefits of ATPE have been demonstrated for various biomolecules, but capacity and separation efficiency were observed to be low for large biomolecules such as VLPs or viruses. Both performance parameters were examined in detail in a case study on human B19 parvovirus-like particles derived from Spodoptera frugiperda Sf9 insect cells. A solubility-guided approach enabled the design of polyethylene (PEG) salt aqueous two-phase systems with a high capacity of up to 4.1 mg/mL VLPs. Unique separation efficiencies were obtained by varying the molecular weight of PEG, the pH value and by using neutral salt additives. Further improvement of the separation of host cell impurities was achieved by multi-stage ATPE on a centrifugal partition chromatography (CPC) device in 500 mL scale. While single-stage ATPE enabled a DNA clearance of 99.6%, multi-stage ATPE improved the separation of host cell proteins (HCPs). The HPLC purity ranged from 16.8% (100% VLP recovery) for the single-stage ATPE to 69.1% (40.1% VU' recovery) for the multi-stage ATPE. An alternative two-step downstream process is presented removing the ATPS forming polymer, cell debris and 99.77% DNA with a HPLC purity of 90.6% and a VLP recovery of 63.9%. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码:35 / 46
页数:12
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