RNY1 partitions into extracellular vesicles and ribonucleoprotein particles during airway inflammation to regulate
Cherie E Saffold1,2,3,4, Antiana C Richardson1,2,3,4, Heather H Pua1,2,3,4
1Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN, USA.
Biorxiv : the Preprint Server for Biology
|December 22, 2025
Summary
Extracellular YRNAs (exYRNAs) in airway fluid, particularly RNY1, signal lung inflammation by packaging into extracellular vesicles and ribonucleoproteins, influencing macrophage responses and neutrophil infiltration.
Area of Science:
- Molecular Biology
- Immunology
- Biochemistry
Background:
- Small noncoding YRNAs are found in cells and biofluids.
- Extracellular YRNAs (exYRNAs) secretion changes with inflammation.
- Mechanisms of exYRNA packaging and biofluid dynamics in inflammation are unclear.
Purpose of the Study:
- Investigate the role of exYRNAs in lung inflammation.
- Determine the packaging and function of YRNAs in airway fluid.
- Elucidate how exYRNAs communicate inflammatory signals.
Main Methods:
- Analyzed YRNA levels in allergen-induced lung inflammation.
- Used RNase sensitivity assays and size exclusion chromatography.
- Examined the effects of extracellular vesicles (EVs) and ribonucleoproteins (RNPs) on macrophage gene expression.
Main Results:
- RNY1 levels increased in airway fluid during lung inflammation, correlating with neutrophil infiltration.
- RNY1 was found in airway fluid EVs and RNPs; RNY3 was only in EVs.
- EVs and RNPs differentially programmed macrophage inflammatory responses, with RNY1 contributing to EV-mediated programming.
Conclusions:
- Defined the form and function of exYRNAs in lung biofluid.
- Showed that exYRNAs communicate inflammatory signals.
- Highlighted RNY1's role in modulating macrophage responses via EVs during lung inflammation.
Keywords:
M2 macrophageRNY1YRNAbronchoalveolar lavage fluidextracellular RNAextracellular vesiclelung inflammationMore Related Videos
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