AI Article Synopsis
- RIG-I-like receptors (RLRs) act as sensors that detect viral RNA, triggering a signaling pathway that produces type I interferons (IFNs), essential for the immune response.
- Early during viral infection, RLRs and other interferon-stimulated genes (ISGs) are induced independently of IFN, relying on transcription factors IRF3 and IRF7.
- The expression of RLRs enhances and accelerates the production of IFNB1 (a type of IFN), indicating a potential link between RLR levels and the early immune response against viruses.
Article Abstract
RIG-I-like receptors (RLRs) are cytoplasmic sensors of viral RNA that trigger the signaling cascade that leads to type I interferon (IFN) production. Transcriptional induction of RLRs by IFN is believed to play the role of positive feedback to further amplify viral sensing. We found that RLRs and several other IFN-stimulated genes (ISGs) are induced early in viral infection independent of IFN. Expression of these early ISGs requires IRF3/IRF7 and is highly correlated amongst them. Simultaneous detection of mRNA of IFNB1, viral replicase, and ISGs revealed distinct populations of IFNB1 expressing and non-expressing cells which are highly correlated with the levels of early ISGs but are uncorrelated with IFN-dependent ISGs and viral gene expression. Individual expression of RLRs made IFNB1 expression more robust and earlier, suggesting a causal relation between levels of RLR and induction of IFN.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6201300 | PMC |
| http://dx.doi.org/10.1039/c7ib00146k | DOI Listing |
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