Journal
VIROLOGY
Volume 589, Issue -, Pages -Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.virol.2023.109928
Keywords
Yokose virus; Flavivirus; No-known arthropod vector virus; 3 ' NCR
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Yokose virus (YOKV), a bat-associated flavivirus, was found to replicate at a slower rate in mosquito cells compared to other mosquito-borne flaviviruses. Specific nucleotide mutations in the virus were identified to enhance its proliferation ability in mosquito cells.
Yokose virus (YOKV) is a bat-associated no-known vector flavivirus group member. We investigated the replication ability of YOKV in mosquito-derived C6/36 cells. YOKV grew in C6/36 cells, but its kinetics of YOKV was markedly slower than those of other mosquito-borne flaviviruses. Transmission electron microscopy indicated an extremely small number of viral particles in YOKV-infected C6/36 cells. Mosquito-borne Japanese encephalitis virus prM-E-bearing chimeric YOKV failed to propagate efficiently in C6/36 cells. We isolated C6/36-adapted YOKV and identified nucleotide mutations in the adapted YOKV. Mutations detected in the 3 ' non-coding region of the adapted YOKV were critical for the enhanced proliferation ability of the virus. Moreover, the growth of the original and adapted YOKV in C6/36 cells was remarkably increased by shifting the culture temperature from 28 to 36( degrees)C. Thus, our results demonstrate the potential of YOKV to propagate in mosquito cells and support its classification as a mosquito-borne flavivirus.
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