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High-throughput Quantitative Real-time RT-PCR Assay for Determining Expression Profiles of Types I and III Interferon Subtypes
Published on: March 24, 2015
An alternative receptor to poly I:C on cell surfaces for interferon induction
Itsuro Yoshida1, Masanobu Azuma
1Department of Microbiology and Immunology, Asahikawa Medical University, Midorigaoka Higashi 2-1, Asahikawa, Hokkaido 078-8510, Japan. iyoshida@asahikawa-med.ac.jp,
Microbiology and Immunology
|May 15, 2013
Summary
Researchers identified a novel cell-surface receptor for polyriboinosinic:polyribocytidylic acid (poly I:C), a synthetic dsRNA. This discovery suggests an alternative pathway for type I interferon induction, distinct from known intracellular pattern recognition receptors.
Area of Science:
- Immunology
- Molecular Biology
- Virology
Background:
- Pattern recognition receptors (PRRs) like Toll-like receptors (TLRs) detect foreign nucleic acids within endosomes and cytoplasm.
- Polyriboinosinic:polyribocytidylic acid (poly I:C), a synthetic double-stranded RNA (dsRNA), is a potent inducer of type I interferon.
Purpose of the Study:
- To investigate the binding characteristics of poly I:C to a rabbit kidney cell line (RK13).
- To explore the potential existence of cell-surface receptors for dsRNA involved in innate immune responses.
Main Methods:
- Analysis of poly I:C binding to RK13 cells.
- Review of previously reported cell-surface dsRNA receptors and other nucleic acid-sensing receptors.
Main Results:
- RK13 cells specifically capture poly I:C with high affinity, suggesting a cell-surface interaction.
- Evidence points towards an unidentified cell-surface receptor mediating poly I:C recognition.
Conclusions:
- A novel class of cell-surface RNA-recognition molecules may exist, distinct from known intracellular dsRNA receptors.
- This finding opens new avenues for understanding innate immune sensing of viral RNA and potential therapeutic targets.
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