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J. Virol., 10 1996, 7260-7263, Vol 70, No. 10
N Shimizu, H Yoshiyama and K Takada
We lack a host cell supporting an efficient lytic replication of
Epstein-Barr virus (EBV). Recently, we isolated EBV-negative cell clones
from the Akata cell line (referred as Akata- [N. Shimizu, A.
Tanabe-Tochikura, Y. Kuroiwa, and K. Takada, J. Virol. 68:6069-6073, 1994).
Since the parental Akata line is one of the highest EBV producers, we
examined whether Akata- cells had become a good host for EBV propagation.
The parental Akata cells have about 20 copies of EBV plasmid per cell. A
drug resistance gene was inserted into one of them by homologous
recombination. The resultant virus preparation, a mixture of wild-type and
recombinant EBV, was used to infect Akata- cells. After incubation in the
selective medium, drug-resistant Akata- cell clones were isolated and
proved to be infected with recombinant EBV only. By treatment of the cells
with antiimmunoglobulin antibodies, a large amount of recombinant EBV
(i.e., more than 10 microg/1-liter culture) was produced. In contrast,
three other B-lymphoma lines, BJAB, Ramos, and Louckes, were nonpermissive
for virus replication. These results indicate that Akata- cells are
suitable for propagation of recombinant EBV clonally, which becomes a
powerful tool for determining EBV genetics and which makes it possible to
use EBV as a vector for gene therapy.
Copyright © 1996, American Society for Microbiology
Clonal propagation of Epstein-Barr virus (EBV) recombinants in EBV- negative Akata cells
Department of Virology and Parasitology, Yamaguchi University School of Medicine, Japan.
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