1887

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Volume 103, Issue 8

Exosomes from WSSV-infected shrimp contain viral components that mediate virus infection No Access

Abstract

Exosomes have been described as vesicles that mediate intercellular communication and thus affect normal and pathological processes. Furthermore, many viruses have been reported to deliver viral components to host cells through exosomes. However, the roles of exosomes in invertebrates response to virus infection are poorly understood. In this study, we found that exosomes purified from white spot syndrome virus (WSSV)-infected hemocytes of shrimp could promote viral replication. These exosomes contained WSSV genomic DNA and nucleocapsid protein VP15, suggesting that exosomes can transfer viral genetic materials between cells, although the exosomes did not have similar infection ability to viruses. Remarkably, in exosomes WSSV DNA was bound to VP15 protein, and moreover VP15 silencing significantly suppressed WSSV infection and reduced the WSSV genome fragments in exosomes, indicating that the presence of VP15 is required for the packing of WSSV DNA inside the exosomes and thereby assists virus to complete immune escape. The above results not only contribute to elucidation of the infection and transmission mechanisms of WSSV, but are also of great significance for further study of virus–host interaction and reasonable prevention measures. Taken together, our findings provide a novel insight into the regulation of virus transmission via exosomes and highlight potential therapeutic strategies.

  • Received:
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Keyword(s): exosomes , shrimp , virus infection , VP15 and white spot syndrome virus
© 2022 The Authors
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/content/journal/jgv/10.1099/jgv.0.001776
2022-08-26
2024-05-05
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Exosomes from WSSV-infected shrimp contain viral components that mediate virus infection
J. Gen. Virol. 103, 001776 (2022); https://doi.org/10.1099/jgv.0.001776
/content/journal/jgv/10.1099/jgv.0.001776
/content/journal/jgv/10.1099/jgv.0.001776
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