Growth of recombinant <Emphasis Type="Italic">Drosophila melanogaster</Emphasis> Schneider 2 cells producing rabies virus glycoprotein in bioreactor employing serum-free medium |
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Authors: | Adriana L L Galesi Marcelo A Aguiar Renato M Astray Elisabeth F P Augusto Ângela M Moraes |
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Institution: | 1.Departament of Biotechnological Processes, School of Chemical Engineering, State University of Campinas, P.O. Box 6066, 13083-852 Campinas, SP Brazil ;2.Laboratory of Industrial Biotechnology, Institute of Technological Research of the State of São Paulo, Av. Prof. Almeida Prado, 532, 05508-901 Sao Paulo, SP Brazil ;3.Laboratory of Viral Immunology, Butantan Institute, Av. Vital Brasil, 1500, 05503-900 Sao Paulo, SP Brazil |
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Abstract: | Drosophila melanogaster Schneider 2 (S2) cells have been increasingly used as a suitable expression system for the production of different recombinant proteins, and the employment of bioreactors for large-scale culture is an important tool for this purpose. In this work, Drosophila S2 cells producing the rabies virus glycoprotein RVGP were cultivated in bioreactor, employing a serum-free medium, aiming an improvement in cell growth and in glycoprotein production. To overcome cell growth limitation commonly observed in stirred flasks, different experiments in bioreactor were performed, in which some system modifications were carried out to attain the desired goal. The study showed that this cell line is considerably sensitive to hydrodynamic forces, and a high cell density (about 16.0 × 106 cells mL−1) was only obtained when Pluronic F68® percentage was increased to 0.6% (w/v). Despite ammonium concentration affected RVGP production, and also cell growth, an elevated amount of the target protein was obtained, attaining 563 ng 10−7 cells. |
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Keywords: | Rabies virus glycoprotein S2 cells Hydrodynamic forces Bioreactor Serum-free medium Pluronic F68® |
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