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Role of long non-coding RNA DLY6E in regulating TMUV infection.
Virus Research 2024 March 3
Long non-coding RNA (lncRNA) is a type of RNA with a length greater than 200 nt and lacking coding ability. In recent years, a considerable number of lncRNAs have been found to have important functions. The lncRNA plays an important role in growth and development, body metabolism, immune function, and regulation of viral replication. A lncRNA, MSTRG8505.2, was screened and named lncRNA DLY6E, which was a new duck-derived lncRNA. The lncRNADLY6E in this study has a complex secondary structure, specifically distributed in the heart, liver and other organs. The expression of lncRNA DLY6E was significantly up-regulated after TMUV infection, which was time-dependent and non-dose-dependent. Overexpression of three structural proteins and seven non-structural proteins of TMUV in DEF cells showed no significant difference in the expression of lncRNADLY6E. Meanwhile, using lipopolysaccharides (LPS) and poly (I:C) to stimulate DEF cells, the results showed that the induced expression of lncRNA DLY6E was associated with the dsRNA-related TLR3/RIG-I/MDA5 pathway rather than the LPS activated signaling pathway. To further explore the function of lncRNA DLY6E, an eukaryotic expression vector was constructed. Overexpression of lncRNA DLY6E in DEF cells can increase the replication of TMUV. After overexpression of lncRNADLY6E, the transcriptional level of its target gene LY6E was detected, and the results showed that lncRNADLY6E did not act through its target gene. Overexpression of lncRNA DLY6E significantly inhibited the mRNA levels of OAS, Mx and PKR, suggesting that lncRNA DLY6E may promote the virus by inhibiting the transcription of antiviral proteins in innate immunity. This phenomenon provides new ideas for the prevention and control of TMUV, which is worth further thinking and exploration.
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