Entomologia Sinica (2004) 11, 165-171

Jian-Xiao Tian, Chang-You Li, Gui-Ling Zheng, Guo-Xun Li, Ping Wang and R.R. Granados (2004)
A new cell clone derived from Trichoplusia ni Tn5B1-4 cells
Entomologia Sinica 11 (3), 165-171
Abstract: The characteristics of a cultured cell line do not always remain stable and may change upon continuous passage. Most continuous cell lines, even after cloning, possess several genotypes that are constantly changing. There are numerous selective and adaptive culture processes, in addition to genetic instability, that may improve phenotypic change in cell growth, virus susceptibility, gene expression, and production of virus. Similar detrimental effects of long term passaging of insect cells have also been reported for continuous cell lines, for example, Tn5B1-4 cells, which are the most widely used for the baculovirus expression vector system (BEVS), provide superior production of recombinant proteins, however, this high productivity may be more evident in low passage cells. In this paper, we describe the isolation of a cell clone, Tn5B-40, from low passage Tn5B1-4 cells. The growth characteristics, productions of virus, and high level of recombinant protein productions were determined. The results showed the susceptibility of both clone and Tn5B1-4 cells to wild-type AcNPV was approximately the same rate with over 95% of infection; when the cloned cells were infected with recombinant baculoviruses expressing ß -galactosidase and secreted alkaline phosphatase (SEAP), expression of the recombinant proteins from the cloned cells exceeded that from the parental Tn5B1-4 cells.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Ping Wang

Research topic(s) for pests/diseases/weeds:
rearing/culturing/mass production
general biology - morphology - evolution

---

Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Trichoplusia ni