このエントリーをはてなブックマークに追加
ID 25660
file
creator
Iwamoto, Tokinori
Mori, Koh-ichiro
Arimoto, Misao
Furusawa, Iwao
subject
Nodavirus
Viral nervous necrosis, VNN
SSN-1 cell line
Cell cloning
C-type retrovirus
Snakehead retrovirus
NDC
Zoology
abstract
Six cell clones were derived from the SSN-1 cell line, which is composed of a mixed cell population and persistently infected with a C-type retrovirus (SnRV). These clones were susceptible to 4 piscine nodavirus strains belonging to different genotypes (SJNNV, RGNNV, TPNNV and BFNNV [striped jack, redspotted grouper, tiger puffer and barfin flounder nervous necrosis viruses]). Three clones, designated A-6, E-9, and E-11, were highly permissive to nodavirus infection and production. The virus-induced cytopathic effects appeared as cytoplasmic vacuoles and intensive disintegration at 3 to 5 d post-incubation. These observations were highly reproducible and formed the basis for a successful virus titration system. Quantitative analysis using the cloned E-11 cell line clearly revealed differences in the optimal growth temperatures among the 4 genotypic variants: 25 to 30°C for strain SGWak97 (RGNNV), 20 to 25°C for strain SJNag93 (SJNNV), 20°C for strain TPKag93 (TPNNV), and 15 to 20°C for strain JFIwa98 (BFNNV). Electron microscopy demonstrated SnRV retrovirus particles only in A-6 and E-9 cells, but PCR amplification for the pol gene and LTR region of the proviral DNA indicated the presence of the retrovirus in the other clones, including E 11. The cell clones obtained in the present study will be more useful for qualitative and quantitative analyses of piscine nodaviruses than the SSN-1 cell line.
journal title
Diseases of Aquatic Organisms
volume
Volume 43
issue
Issue 2
start page
81
end page
89
date of issued
2000-11-14
publisher
Inter-Research
issn
0177-5103
1616-1580
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 2000 Inter-Research.
relation url
department
Graduate School of Biosphere Science