The oxygen uptake rate( OUR ) during the cultivation of Vero cells in 1.5L CelliGen bioreactor was on line determined using the dynamic method.The results showed that the cell growth and metabolic state during the exp...The oxygen uptake rate( OUR ) during the cultivation of Vero cells in 1.5L CelliGen bioreactor was on line determined using the dynamic method.The results showed that the cell growth and metabolic state during the exponential growth phase was lineally related to the OUR .This implies that the on line measurement of OUR can be used to promptly monitor the physiological state of cultured cells and to efficiently avoid contamination because of frequent sampling in the large scale cultivation of mammalian cells.展开更多
考察了过量表达CHO细胞的内源性XBP1(X-box binding protein 1)对于重组CHO细胞中乙肝表面抗原(HBsAg)分泌的影响。结果表明:XBP1无法改善DMSO作用下CHO细胞中HBsAg的分泌,但能促进DTT作用下的HBsAg的分泌。进一步研究发现,细胞在DTT作...考察了过量表达CHO细胞的内源性XBP1(X-box binding protein 1)对于重组CHO细胞中乙肝表面抗原(HBsAg)分泌的影响。结果表明:XBP1无法改善DMSO作用下CHO细胞中HBsAg的分泌,但能促进DTT作用下的HBsAg的分泌。进一步研究发现,细胞在DTT作用下形成了内质网分泌压力,而在DMSO作用下,没有形成内质网分泌压力。由此推断在内质网成为分泌限制部位的情况下,XBP1能够促进HBsAg的分泌;而DMSO通过促进二硫键的形成促进了HBsAg在内质网中的分泌,使得分泌限制部位发生在分泌过程中的其他细胞器。展开更多
文摘The oxygen uptake rate( OUR ) during the cultivation of Vero cells in 1.5L CelliGen bioreactor was on line determined using the dynamic method.The results showed that the cell growth and metabolic state during the exponential growth phase was lineally related to the OUR .This implies that the on line measurement of OUR can be used to promptly monitor the physiological state of cultured cells and to efficiently avoid contamination because of frequent sampling in the large scale cultivation of mammalian cells.
文摘考察了过量表达CHO细胞的内源性XBP1(X-box binding protein 1)对于重组CHO细胞中乙肝表面抗原(HBsAg)分泌的影响。结果表明:XBP1无法改善DMSO作用下CHO细胞中HBsAg的分泌,但能促进DTT作用下的HBsAg的分泌。进一步研究发现,细胞在DTT作用下形成了内质网分泌压力,而在DMSO作用下,没有形成内质网分泌压力。由此推断在内质网成为分泌限制部位的情况下,XBP1能够促进HBsAg的分泌;而DMSO通过促进二硫键的形成促进了HBsAg在内质网中的分泌,使得分泌限制部位发生在分泌过程中的其他细胞器。