Abstract
We established a continuous cell line from the embryo of the mosquito Culex tritaeniorhynchus Giles (Diptera: Culicidae), a known major vector of the Japanese encephalitis virus (family Flaviviridae, genus Flavivirus) in Asia. The cell line, designated NIID-CTR, was serially subcultured in VP-12 medium supplemented with 10 % heat-inactivated fetal bovine serum (FBS). It continued to grow for more than 60 passages over a 750-d period. The NIID-CTR cell line mainly comprised two morphologically distinct types of cells with adhesive properties: spindle-shaped and round cells. Most of the NIID-CTR cells at the 45th passage were diploid (2n = 6). The growth kinetics of the NIID-CTR cells was significantly affected by the FBS concentration in the medium. The population doubling time of the NIID-CTR cells was 20 h in the presence of 10 % FBS and 76 h in its absence. The DNA sequence of the mitochondrial cytochrome oxidase I gene confirmed that the NIID-CTR cell line was derived from C. tritaeniorhynchus. The cells were highly susceptible to Japanese encephalitis and Dengue viruses, thus providing a valuable tool for the study of mosquito-borne flaviviruses.
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This work was partially supported by a grant from Japanese Ministry of Health, Labor and Welfare (21-Shinko-Ippan-005), a Grant-in-aids from the Japan Society for the Promotion of Science (Scientific Research C, no. 22590387), and a grant from Japanese Ministry of the Environment (Global Environment Research Fund, S-8).
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Kuwata, R., Hoshino, K., Isawa, H. et al. Establishment and characterization of a cell line from the mosquito Culex tritaeniorhynchus (Diptera: Culicidae). In Vitro Cell.Dev.Biol.-Animal 48, 369–376 (2012). https://doi.org/10.1007/s11626-012-9520-1
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DOI: https://doi.org/10.1007/s11626-012-9520-1