Abstract
Downstream processing is an expensive step for industrial production of recombinant proteins. Cell immobilization is known as one of the ideal solutions in regard to process intensification. In recent years, magnetic immobilization was introduced as a new technique for cell immobilization. This technique was successfully employed to harvest many bacterial and eukaryotic cells. But there are no data about the influence of magnetic immobilization on the eukaryotic inducted recombinant cells. In this study, impacts of magnetic immobilization on the growth and metabolic status of induced recombinant Pichia pastoris as a valuable eukaryotic model cells were investigated. Results based on colony-forming unit, OD600, and trypan blue assay indicated that magnetic immobilization had no adverse effect on the growth and viability of P. pastoris cells. Also, about 20–40% increase in metabolic activity was recorded in immobilized cells that were decorated with 0.5–2 mg/mL nanoparticles. Total protein and carbohydrate of the cells were also measured as main indicatives for cell function and no significant changes were observed in the immobilized cells. Current data show magnetic immobilization as a biocompatible technique for application in eukaryotic expression systems. Results can be considered for further developments in P. pastoris-based expression systems.
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Acknowledgements
This experiment was funded by Shiraz University of Medical Sciences, under a PhD thesis proposal submitted at No. 18588 in the School of Pharmacy. Authors are grateful to the support provided by the University of Waikato, New Zealand.
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Tagizadeh, SM., Ebrahiminezhad, A., Ghoshoon, M.B. et al. Impacts of Magnetic Immobilization on the Growth and Metabolic Status of Recombinant Pichia pastoris. Mol Biotechnol 64, 320–329 (2022). https://doi.org/10.1007/s12033-021-00420-w
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DOI: https://doi.org/10.1007/s12033-021-00420-w