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- W4205855167 abstract "The enzyme 2'-5'-oligoadenylate synthetase (OAS) is an antiviral protein induced by interferons (IFNs), which plays an important role in IFN-mediated antiviral signaling pathway. In this study, the OAS of Chinese Giant Salamander, Andrias davidianus (AdOAS) was identified for the first time, and the expression profiles in vivo and the antiviral activities in vitro were investigated. The open reading frame (ORF) of AdOAS gene is 1185 bp in length, encoding a putative protein of 394 amino acids, in which a Nucleotidyltransferase (NTase) domain (40-143 aa) and a conserved OAS1 C superfamily domain (165-341 aa) are included. qRT-PCR analysis revealed a broad expression of AdOAS in vivo, with the highest expression level in intestine and heart. After infection with Chinese giant salamander iridovirus (GSIV), the mRNA level of AdOAS in liver increased significantly at 24 h and 48 h post infection and reached the peak at 72 h compared with the control group. The AdOAS mRNA level in kidney increased slightly at 6 h and 12 h post infection, declined to the initial level at 24 h and peaked at 48 h post infection, while in spleen it was slightly up-regulated at 6 h, inhibited at 12 h, 24 h and 48 h, and then significantly increased to the peak at 72 h post infection. In vitro, AdOAS mRNA level in Chinese giant salamander muscle (GSM) cells was not noticeably up-regulated until 24 h and then peaked at 48 h post GSIV infection. In antiviral activity test, the mRNA transcription and protein level of virus major capsid protein (MCP) in AdOAS over-expressed cells was significantly reduced compared with that in control cells by qRT-PCR and western blot analysis. In addition, ddPCR results showed that lower MCP gene copy was found in AdOAS over-expressed cells compared with the control group. These results collectively suggest that AdOAS plays a crucial role against GSIV infection in Chinese giant salamander, and provide a solid base for the further studies on the mechanism of immune defense and the control of the disease in this animal." @default.
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- W4205855167 date "2022-04-01" @default.
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- W4205855167 title "Characterization, expression pattern and antiviral activities of oligoadenylate synthetase in Chinese Giant Salamander, Andrias davidianus" @default.
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- W4205855167 doi "https://doi.org/10.1016/j.dci.2022.104347" @default.
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