Sustained high-yield production of recombinant proteins in transiently transfected COS-7 cells grown on trimethylamine-coated (hillex) microcarrier beads.
Sustained high-yield production of recombinant proteins in transiently transfected COS-7 cells grown on trimethylamine-coated (hillex) microcarrier beads.
复制标题
在三甲胺包被的 (hillex) 微载体珠上生长的瞬时转染 COS-7 细胞中持续高产重组蛋白。
DOI：
10.1021/bp020092r
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
Stoolman,LloydM
中科院分区：
文献类型：
--
作者：
Knibbs,RandallN;Dame,Michael;Allen,MelissaR;Ding,Yunhong;Hillegas,WilliamJ;Varani,James;Stoolman,LloydM
The present study shows that COS‐7 cells transiently transfected and maintained on positively charged (trimethylamine‐coated) microcarrier beads synthesize recombinant protein at higher levels and for longer periods of time than cells transfected and maintained on polystyrene flasks in monolayer culture. Sustained, high‐level synthesis was observed with secreted chimeric proteins (murine E‐selectin– and P‐selectin‐human IgM chimeras) and a secreted hematopoietic growth factor (granulocyte‐macrophage colony‐stimulating factor). Studies with green fluorescent protein indicated that the transfected cells attached more firmly to the trimethylamine‐coated microcarriers than to polystyrene flasks. After 10–14 days in culture, most of the transfected cells detached from the surface of the polystyrene flasks, whereas most transfected cells remained attached to the microcarriers. The transiently transfected microcarrier cultures produced higher levels of protein per transfected cell due to this prolonged attachment. The prolonged attachment and higher output of transfected cells on microcarriers resulted in a 5‐fold increase in protein production from a single transfection over two weeks. Thus, microcarrier‐based transient transfection yields quantities of recombinant proteins with a significant savings of time and reagents over monolayer culture.
