Download MendeleyLocal activation of mutant RIG-I by short noncoding Y-RNA in the kidney triggers lethal nephritis.
Satoh, S., Tan, Y.B., Heil, B., Yamada, S., Schutte, V., Phang, C., Tang, C., Tsukamoto, Y., Higuchi, T., Fujita, T., Behrendt, R., Schlee, M., Luo, D., Kato, H.(2025) Sci Immunol 10: eadx1135-eadx1135
- PubMed: 41171879 Search on PubMed
- DOI: https://doi.org/10.1126/sciimmunol.adx1135
- Primary Citation Related Structures:
9KTW, 9KU4 - PubMed Abstract:
Detecting viral RNA by the ubiquitously expressed cytosolic receptor retinoic acid-inducible gene I (RIG-I) is critical for antiviral immune responses, including type I interferon (IFN-I) and chemokine induction. RIG-I has evolved to sensitively recognize viral RNA but tolerate self-RNA. RIG-I mutations causing self-tolerance loss induce IFN-I and chemokines in patients, initiating autoinflammation. We observed that mice expressing the RIG-I patient variant E373A spontaneously developed lupus-like nephritis. Kidney-derived chemokines attracted monocytes through CCR2 (C-C motif chemokine receptor 2) and induced interstitial inflammation and tubular damage. This led to renal dysfunction independently of immunoglobulin G-nucleic acid complex deposition. Sequencing of RIG-I E373A-bound RNA from kidney-derived cells identified short noncoding Y-RNA. Deletion of the most enriched Y-RNA species reduced RIG-I E373A-induced IFN-I responses. Cryo-electron microscopy and molecular analyses revealed that RIG-I E373A binding to the Y-RNA stem region resulted in its activation. Thus, we demonstrate that Y-RNA activates a RIG-I gain-of-function mutant in a tissue-specific manner, causing autoinflammation culminating in lupus nephritis.
- Institute of Cardiovascular Immunology, Medical Faculty, University Hospital Bonn, University of Bonn, Bonn, Germany.
Organizational Affiliation:
