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Pubmed ID :30382935
Publication Date : //

MicroRNA-30c targets the interferon-alpha/beta receptor beta chain to promote type 2 PRRSV infection.


Porcine reproductive and respiratory syndrome (PRRS) is one of the most important diseases in pigs. MicroRNAs (miRNAs) have emerged as an important regulator of virus-host cell interactions and miR-30c has been found to facilitate PRRSV replication. Here, we found that the interferon-alpha/beta receptor beta chain (IFNAR2) was down-regulated, while miR-30c was up-regulated during HV (a highly pathogenic type 2 PRRSV strain) and CH-1a (a classic type 2 PRRSV strain) infection. Subsequently, using bioinformatics analysis, we predicted that the IFNAR2 was targeted by miR-30c. A luciferase assay verified that the 3' UTR of IFNAR2 was targeted by miR-30c, as a mutation on either the target sequence or the miR-30c seed sequence reversed the luciferase activity. In addition, miR-30c and IFNAR2 mRNA were physically co-localized in RNA-induced silencing complex (RISC). Importantly, we showed that miR-30c also impaired the induction of IFN-stimulated genes (ISGs) by targeting IFNAR2. Our findings further reveal the mechanism of miR-30c promoting PRRSV replication.

Authors : Liu Fang , Wang Honglei , Du Li , Wei Zeyu , Zhang Qiong , Feng Wen-Hai ,

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