In situ monitoring of intracellular glucose and glutamine in CHO cell culture.

In situ monitoring of intracellular glucose and glutamine in CHO cell culture.
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DOI:
10.1371/journal.pone.0034512
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发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Polizzi KM
Polizzi KM
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Behjousiar A;Kontoravdi C;Polizzi KM

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工业上生产生物制药的过程的发展仍然主要是经验性的,并依赖于以特定产品的方式优化培养基配方和细胞系。目前的小规模(基于孔板的)工艺开发方法不能提供足够的样本量进行分析,以获得有关营养利用的信息,当工艺规模扩大到工业发酵罐时,这可能是一个问题。我们设想一个平台,在这个平台上,必需代谢物可以在一个超低容量的分析中无创地实时监测,以便在高通量筛选中提供关于细胞代谢的额外信息。为此,我们建立了一个稳定表达葡萄糖和谷氨酰胺蛋白生物传感器的中国仓鼠卵巢细胞模型系统。在此,我们证明这些可以准确地反映CHO细胞分批培养和补料分批培养过程中体内细胞内代谢物浓度的变化。高通量监测细胞内必需营养素消耗的能力将使改进生物过程的快速发展成为可能。
The development of processes to produce biopharmaceuticals industrially is still largely empirical and relies on optimizing both medium formulation and cell line in a product-specific manner. Current small-scale (well plate-based) process development methods cannot provide sufficient sample volume for analysis, to obtain information on nutrient utilization which can be problematic when processes are scaled to industrial fermenters. We envision a platform where essential metabolites can be monitored non-invasively and in real time in an ultra-low volume assay in order to provide additional information on cellular metabolism in high throughput screens. Towards this end, we have developed a model system of Chinese Hamster Ovary cells stably expressing protein-based biosensors for glucose and glutamine. Herein, we demonstrate that these can accurately reflect changing intracellular metabolite concentrations in vivo during batch and fed-batch culture of CHO cells. The ability to monitor intracellular depletion of essential nutrients in high throughput will allow rapid development of improved bioprocesses.
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