High Throughput Screening Technologies for developing purification processes of proteins. Michel Eppink, Synthon BV, Nijmegen
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1 High Throughput Screening Technologies for developing purification processes of proteins Michel Eppink, Synthon BV, Nijmegen
2 Introduction Overview From small to large processes New protein purification technologies Resin Screening Studies Resin Scouting Studies Case Studies I + II Conclusions
3 Introduction
4 Why Purification of Proteins? Development of robust purification processes (DSP) for therapeutic proteins is essential Time to market for DSP development saves money (DSP is a costly process) Reduce the amount of column/filtration steps and increase the overall yield Diminish the amount of impurities such as host cell related proteins
5 First Recombinant Proteins Insulin (first recombinant product commercialized 1983) Granulocyte Colony Stimulating Factor (GCSF) Gonadotrophins (HCG, FSH) Interferon α/β Interleukins Growth Hormone Erythropoetin (EPO)
6 Monoclonal Antibodies Large biomolecules (150 kd) Contain both heavy (50 kd) and light (25 kd) chain Expression mainly in eucaryotic cell lines (NS0, PerC6, CHO, HEK or other cell lines) Mainly glycosylation at the C H chains Activity determined by F ab region
7 Principle of a Chromatographic Step Ligand: -Ionic -Hydrophobic -Affinity Column with Resin Sample Chromatogram mau BKA0023 IMAC003 :10_ UV1_ 280nm BKA0023 IMAC003 :10_ Logbook Equilibration Flow through Wash Elution sample injection Flow through Start w ashing Elution Wash Wash 2 Wash 3 Start elution strip 1M NaOH m l
8 Development DSP processes in early years Batch wise resin screening in small tubes Process Development with in house equipment
9 From Small to Large Processes
10 Small Large Experimental space
11 From small to large Miniaturization Scouting Studies Research Scale Development Scale Large Scale ml ml ml 1-10 % (1-10 liter) 100% ( liter)
12 New Purification Technologies
13 Robotic Handling System Small scale purification in microtiterplate and/or minicolumn format Automatic handling of the samples (Fast) assay analysis (EIA, HPLC, UV, Protein, etc.) Parallel testing of different purification conditions (ph, salt, additives, organic solvents, resins, etc.) Resin screening/scouting studies can be performed in a reproducible way
14 Freedom EVO Protein Chromatography Workstation Freedom EVO 100 LiHa / RoMa Tecan Reader optional, for result analysis Hotels/ carriers sample and buffer preparation Te-Chrom Te-Stack optional, for collection of fractions
15 Resin Screening Studies
16 Resin Screening Studies I Essential part of the screening studies is the pipetting robot Pipet chromatographic resin with high reproducibility from a 12-well plate Into a 96-well filter plate (in the near future maybe a 386- well plate would probably be feasible?) Analysis with UV/VIS Reader
17 Resin Screening Studies II Robot Liquid Handling Batchwise chromatography (96 experiments /day) Titer (ELISA/UPLC) HCP (ELISA) Protein UV CE MS (MALDI/ESI) SDS-PAGE Centrifugation/Vacuum filtration Screening of Resins Low/medium resolution Determination of DBC No flow/bedheight properties map
18 Case Study I
19 Case Study I Cell supernatant of a CHO cell line contains a glycoprotein with a molecular mass of approx kd (heterodimer) Development intermediate step with HIC resins (screening/scouting) HTS occurs with robotic system Detection is performed by UV, protein and/or product specific tests
20 Case Study I Resins screened Elution profile s with different at (NH salt 4 ) concentrations 2 SO 4 concentrations
21 Resin Scouting Studies
22 Atoll RoboColumns Pre-packed with the resin of choice per each row Bed heights: 2.5, 5, 10, 30 mm; inner diameter: 5 mm Column volumes: 50, 100, 200, 600 µl
23 Freedom EVO Protein Chromatography Workstation Sample loading Collection of fractions
24 Workflow in High Throughput Chromatography Sample preparation/ clarification Preparation of Elution Buffers Column equilibration Sample Loading Elute with Buffer X Elute with Buffer Y Collect Fractions Analysis (Tecan (TECAN Reader) Reader)
25 Case Study II
26 Case Study II Comparison of chromatograms Common LC instrumentation vs. RoboColumns processed on Freedom EVO Example study: Separation of 2 proteins Separation of lysozyme and cytochrome c on a cation exchange column, using a step gradient of 0,1 M or 1 M NaCl respectively
27 Case Study II Chromatograms for the separation of two proteins (lysozyme, cytochrome c (each 1 mg/ml) on cation exchangers packed in 200µl Atoll columns for 8 RoboColumns using 0.1 M NaCl or 1 M NaCl respectively, processed on a common LC instrumentation or Freedom EVO respectively xe+3 OD 280 mau nm [mau] 2 1 Shift due to lower dead volume (min) Time [min] Chromatograms from a common LC instrumentation and Freedom EVO are identical Extremely high reproducibility from column to column Data kindly provided by TimSchroeder, Atoll, Germany
28 Platform Technology for DSP processes Pipetting robot studies Selected resin(s) Robot/Column Scouting studies Selected resin Robot/Column optimization studies ph, buffer, salt, organic solution screening ph, buffer, salt, organic solution screening Parameter screening (Experimental Design) M.H.M. Eppink (2007). Biopharm International, 20, 3, M.H.M. Eppink (2009). Biopharm International, Mar 2, Supplement
29 Conclusions Robot handling equipment important for Downstream Processing (DSP) Fast performance of purification processes Large screening window Small amount of product needed
30 Acknowledgement TU Delft Marcel Ottens Synthon Guy de Roo Kim Burgers Xiaonan Li Meng Liu TECAN Marc Brus Dennis Bertens Dirk de Regt Atoll Jurgen Friedle Tim Schroeder Kalsruhe Institute of Technology Juergen Hubbuch
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