T. Matsuda et al., ENHANCEMENT OF TRANSGENE EXPRESSION IN MAMMALIAN-CELL LINE BY A DELTA(7)-PROSTAGLANDIN A(1) ANALOG, Journal of fermentation and bioengineering, 79(3), 1995, pp. 281-283
We transfected a Chinese hamster ovary cell line, CHO-K1, with the gen
e of the Escherichia coli beta-galactosidase (beta-Gal) or the firefly
luciferase (Luc) gene together with neo(R) gene, and isolated the sta
ble transfectants, designated as CHO-Z/neo and CHO-L/neo, respectively
. When these cells were incubated for 24 to 72 h with 1.0 mu g/ml TEI-
3313, a Delta(7)-prostaglandin A(1) analogue, the total and the specif
ic activities of beta-Gal and Luc were enhanced severalfold. It was co
nfirmed by immunotitration experiments that the enhancement of beta-Ga
l activity was due to an increase in the level of enzyme protein. Nort
hern blot analysis revealed that this compound augmented the level of
beta-Gal mRNA. On the other hand, it did not significantly affect the
expression of an endogenous gene such as that encoding lactate dehydro
genase or beta-actin.