Establishment and characterization of a new <Emphasis Type="Italic">Aedes aegypti</Emphasis> (L.) (Diptera: Culicidae) cell line with special emphasis on virus susceptibility |
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Authors: | A B Sudeep Deepti Parashar Ramesh S Jadi Atanu Basu Chetan Mokashi Vidya A Arankalle Akhilesh C Mishra |
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Institution: | (1) Microbial Containment Complex, National Institute of Virology, Indian Council of Medical Research, Sus Road Pashan, Pune, 411021, India;(2) Modern College, Shivajinagar, Pune, India |
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Abstract: | A new cell line from the neonate larvae of Aedes aegypti (L) mosquito was established and characterized. The cell line at the 50th passage (P) level consisted of three prominent
cell types, i.e., epithelial-like cells (92%), fibroblast-like cells (7%), and giant cells (∼1%). Karyological analysis showed
diploid (2n = 6) number of chromosomes in >75% cells at P-50. The growth kinetics studied at 52nd passage level showed approximately
tenfold increase in cell number over a 10-d study period. The species specificity studies using DNA amplification fingerprinting
profile analysis using RAPD primers demonstrated 100% homology with the host profile showing the integrity of the cell line.
Electron microscopy revealed the absence of mycoplasma or other adventitious agents. The cell line supported the multiplication
of seven arboviruses, i.e., Chikungunya (CHIK), Japanese encephalitis, West Nile, dengue 2 (DEN-2), Chandipura, vesicular
stomatitis, and Chittoor viruses. The cell line did not replicate Ganjam and Kaisodi viruses. CHIK virus yield in the new
cell line was approximately 3log and 0.5log 50% tissue culture infective dose (TCID50)/mL higher than Vero E6 and C6/36 cell lines, respectively. In the case of DEN-2 virus, it yielded 1log TCID50/mL higher than Vero E6, but lesser than C6/36 cell line. Due to its high susceptibility to a broad spectrum of viruses, the
new cell line may find application in virus isolation during epidemics and in antigen production. |
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