文献类型：期刊文献

英文题名：Regulation of the pyruvate metabolism node by monogene and polygene engineering of HEK-293 cells

作者：Xie, Li[1];Miao, Junqing[1];Li, Xiangchao[1];Yi, Xiaoping[1];Chu, Ju[1]

机构：[1]East China Univ Sci & Technol, Sch Bioengn, State Key Lab Bioreactor Engn, 130 Mei Long Rd, Shanghai 200237, Peoples R China

年份：2019

卷号：9

期号：61

起止页码：35760

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20194607683745);WOS:【SCI-EXPANDED(收录号:WOS:000498861100046)】；

基金：This work was supported by grants from the Shanghai Zhangjiang National Innovation Demonstration Zone Key projects of Special Development Funds (201310-FX-B2-002) and the Chinese National Programs for High Technology Research and Development (2015AA020801).

语种：英文

外文关键词：Metabolic engineering - Cell proliferation - Metabolism - Mammals - Vaccines

摘要：HEK-293 cells are increasingly being used in the production of human adenovirus (HAdV) vaccines. However, the production of HAdV vaccine has not met the requirements of industrial production. Recently, we investigated the effects of various regulatory genes of the pyruvate metabolism node on the substance and energy metabolism and adenovirus reproduction in HEK-293 cells. Initially, single regulatory genes, including pkm2, pdh alpha, pyc2, mpc3, aralar1, ldha and pdk1, were studied. We found that metabolic performance and adenovirus reproduction capacity in HEK-293 cells were improved, and maximum adenovirus titre was increased approximately 15-fold. Next, we co-overexpressed the key genes, including pkm2, pyc2 and aralar1. The PYC2-A-P-L cells that had the appropriate co-overexpression levels of three genes had the most pronounced regulatory effect. The maximum cell density and maximum specific growth rate were increased by 21% compared with that in the control. The Delta Lac/Delta Glc and Delta NH3/Delta Gln were decreased by 26% and 27%, respectively. The ATP production rate and the ATP/O-2 ratio were increased by 110% and 20%, respectively. The level of reactive oxygen species (ROS) was reduced by 60%. The adenovirus reproductive ability of the PYC2-A-P-L cells was approximately 30-fold higher than that of the control. The results showed that proper overexpression of the aralar1, pkm2 and pyc2 genes can significantly improve the substance and energy metabolism efficiency in HEK-293 cells, maximize the metabolic balance of pyruvate, and ultimately improve HAdV reproduction. This study provides a method of regulation of pyruvate metabolism and polygenic metabolic engineering in mammalian cells cultured in vitro and suggests an effective method for efficient HAdV production.