Abstract
Bisphenol A (BPA) plays a substantial role in industry, as it is used for polycarbonate (PC) plastics and epoxy resins which are required for various plastic consumer products. However, BPA is known to be an endocrine disruptor, and its influence on humans, animals, and various cell lines was addressed in diverse studies. As the burden of BPA can be increased by using disposable plastic articles and single-use technologies for cultivation, it is essential to examine the consequences of BPA presence on mammalian cells, as they are a contributing factor in the production of complex pharmaceutical therapeutics. We selected three industrially relevant cell lines and analyzed systemic effects of BPA by comparing cell culture performance in BPA-free poly-ethylene terephthalate glycol (PETG) and in PC shaking flasks. We focused on the influence of BPA on cellular growth, viability, and several metabolic parameters. In addition, we determined the product concentration and aggregation behavior of the recombinant proteins expressed by these cell lines and the BPA concentration within the medium caused by leaching. Moreover, we performed EC50 studies to determine the toxic concentration of BPA. Our results indicated that leached BPA had no effect on specific growth rates and viability and toxicity appeared at about 104 times higher concentrations; however, it influenced the specific productivity rate and metabolic activity parameters of our Chinese hamster ovary (CHO) cell line. Consequently, one can neglect BPA from leaching in the culture as long as the selected cell line is BPA tolerant. Otherwise, BPA can be a hurdle for pharmaceutical production, as it can influence the specific productivity of recombinant proteins.
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Acknowledgments
This study was supported by the Cooperative Research Training Group Pharmaceutical Biotechnology stated by the Postgraduate Scholarship Act of the Ministry of Science, Research and Arts of the federal state government of Baden-Württemberg and by the German Federal Ministry of Education and Research (Grant No. 0315342A). Further acknowledgements address the International Graduate School in Molecular Medicine of Ulm University, Germany, for scientific encouragement and support.
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Stiefel, F., Paul, A.J., Jacopo, T. et al. The influence of bisphenol A on mammalian cell cultivation. Appl Microbiol Biotechnol 100, 113–124 (2016). https://doi.org/10.1007/s00253-015-6956-8
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DOI: https://doi.org/10.1007/s00253-015-6956-8