谷氨酰胺
生物
细胞培养
细胞生长
新陈代谢
谷氨酸受体
生长培养基
谷氨酸脱氢酶
化学定义介质
补料分批培养
食品科学
生物化学
氨基酸
细菌
发酵
体外
受体
遗传学
作者
A. Beas-Catena,A. Sánchez-Mirón,Francisco Garía-Camacho,A. Contreras-Gómez,E. Molina Grima
出处
期刊:Journal of Microbiology and Biotechnology
[Journal of Microbiology and Biotechnology]
日期:2013-12-28
被引量:6
标识
DOI:10.4014/jmb.1305.05067
摘要
The aim of this paper was to study the effect of spent medium recycle on Spodoptera exigua Se301 cell line proliferation, metabolism, and baculovirus production when grown in batch suspension cultures in Ex-Cell 420 serum-free medium. The results showed that the recycle of 20% of spent medium from a culture in mid-exponential growth phase improved growth relative to a control culture grown in fresh medium. Although both glucose and glutamine were still present at the end of the growth phase, glutamate was always completely exhausted. The pattern of the specific glucose and lactate consumption and production rates, as well as the specific glutamine and glutamate consumption rates, suggests a metabolic shift at spent medium recycle values of over 60%, with a decrease in the efficiency of glucose utilization and an increase in glutamate consumption to fuel energy metabolism. Baculovirus infection provoked a change in the metabolic pattern of Se301 cells, although a beneficial effect of spent medium recycle was also observed. Both growth rate and maximum viable cell density decreased relative to uninfected cultures. The efficiency of glucose utilization was dramatically reduced in those cultures containing the lowest percentages of spent medium, whereas glutamine and glutamate consumption was modulated, thereby suggesting that infected cells were devoted to virus replication, retaining their ability to incorporate the nutrients required to support viral replication. Recycle of 20% of spent medium increased baculovirus production by around 90%, thus showing the link between cell growth and baculovirus production.
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