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- W2003669498 abstract "ABSTRACT Rice ragged stunt virus (RRSV), an oryzavirus in the family Reoviridae , is transmitted by the brown planthopper, Nilaparvata lugens , in a persistent-propagative manner. Here, we established a continuous cell line of brown planthopper to investigate the mechanism underlying the formation of the viroplasm, the putative site for viral replication and assembly, during infection of RRSV in its insect vector cells. Within 24 h of viral infection of cultured cells, the viroplasm had formed and contained the viral nonstructural proteins Pns6 and Pns10, known to be constituents of viroplasm. Core capsid protein P3, core particles, and newly synthesized viral RNAs were accumulated inside the viroplasm, while outer capsid protein P8 and virions were accumulated at the periphery of the viroplasm, confirming that the viroplasm induced by RRSV infection was the site for viral replication and assembly. Pns10 formed viroplasm-like inclusions in the absence of viral infection, suggesting that the viroplasm matrix was largely composed of Pns10. Pns6 was recruited in the viroplasm by direct interaction with Pns10. Core capsid protein P3 was recruited to the viroplasm through specific association with Pns6. Knockdown of Pns6 and Pns10 expression using RNA interference inhibited viroplasm formation, virion assembly, viral protein expression, and viral double-stranded RNA synthesis. Thus, the present study shows that both Pns6 and Pns10 of RRSV play important roles in the early stages of viral life cycle in its insect vector cells, by recruiting or retaining components necessary for viral replication and assembly. IMPORTANCE The brown planthopper, a commonly distributed pest of rice in Asia, is the host of numerous insect endosymbionts, and the major vector of two rice viruses (RRSV and rice grassy stunt virus). For the first time, we successfully established the continuous cell line of brown planthopper. The unique uniformity of brown planthopper cells in the monolayer can support a consistent, synchronous infection by endosymbionts or viral pathogens, improving our understanding of molecular insect-microbe interactions." @default.
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- W2003669498 date "2014-04-15" @default.
- W2003669498 modified "2023-10-18" @default.
- W2003669498 title "Development of Continuous Cell Culture of Brown Planthopper To Trace the Early Infection Process of Oryzaviruses in Insect Vector Cells" @default.
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- W2003669498 doi "https://doi.org/10.1128/jvi.03466-13" @default.
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