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Interferon-beta (IFN-β) is a critical antiviral cytokine and is essential for innate and acquired immune responses to pathogens. Treatment with polyinosinic:polycytidylic acid (poly(I:C)) induces transient accumulation of IFN-β mRNA, which involves an increase and a decrease of IFN-β mRNA. This phenomenon has been extensively analyzed as a model for understanding the mechanisms of transient gene induction in response to external stimuli. Using a new RNA metabolic labeling method with ethynyluridine to directly measure de novo RNA synthesis and RNA stability, we reassessed both de novo synthesis and degradation of IFN-β mRNA. We found that transcriptional activity is maintained after the maximum accumulation of IFN-β mRNA following poly(I:C) treatment on immortalized human bronchial epithelial cells. We also observed an unexpected change in the stability of IFN-β mRNA before and after the maximum accumulation. The results indicate that this method of RNA metabolic labeling provides a general approach for the simultaneous analysis of transcriptional activity and mRNA stability coupled with transcriptional timing. Copyright © 2012 Elsevier Inc. All rights reserved.

Citation

Kaito Abe, Tomoaki Ishigami, Ann-Bin Shyu, Shigeo Ohno, Satoshi Umemura, Akio Yamashita. Analysis of interferon-beta mRNA stability control after poly(I:C) stimulation using RNA metabolic labeling by ethynyluridine. Biochemical and biophysical research communications. 2012 Nov 9;428(1):44-9

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PMID: 23063848

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