Objective: To screen and domesticate the adherent cultured CHO cells to obtain high expression of cell suspension culture for production of recombinant human erythropoietin erythropoietin (rHuEPO). Methods: Using 96-well and 24-well plates culture method to screen and domesticate the highly expressing CHO cell strain. Acclimate the high expression cell strain and make it suitable for suspension culture. It's inoculated into the bioreactor in serum-free culture after amplified by the shake flask, and monitoring of glucose content, measuring rHuEPO expression of daily. Results: The suspension culture of CHO cell production of rHuEPO has short production period, higher expression than adherent culture. On the other hand, it is easy to operate and scale-up, but not easy to pollute. Furthermore, we established of the CHO cell strain for suspension culture,which provided a technical basis for industrial production of CHO cells the rHuEPO. Conclusion: After process optimization, the use of serum-free suspension culture production of erythropoietin average expression has high, short production period, low cost of production.than adherent culture.%目的:通过对贴壁培养CHO细胞筛选驯化,得到高表达的细胞后进行悬浮培养生产重组人促红细胞生成素(rHuEPO).方法:利用96孔板和24孔板对CHO细胞进行筛选,得到高表达细胞株后进行驯化,使其适合悬浮培养,经过摇瓶扩增后接种到生物反应器中无血清培养,每天监测葡萄糖含量,测rHuEPO表达量.结果:悬浮培养CHO细胞生产rHuEPO,生产周期短,表达量比贴壁培养高出很多,操作方便,减少污染,易于放大,并建立了适合悬浮培养的CHO细胞株,为工业化悬浮培养CHO细胞生产rHuEPO提供了技术基础.结论:经过工艺优化后利用无血清悬浮培养生产促红细胞生成素平均表达量较贴壁培养高,生产周期短,有利于降低生产成本.
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