Emerging cell surface glycoRNAs with potential regulatory roles

Glycosylated RNAs (glycoRNAs) have recently emerged as an unexpected class of RNA-glycan hybrids, expanding the chemical and functional landscape of the transcriptome. Their covalent glycan modifications confer molecular features typically reserved for glycoproteins and glycolipids. Notably, proximity ligation studies demonstrate that glycoRNAs reside on the cell surface, overturning the long-standing paradigm that RNAs function exclusively inside cells. This extracellular localization suggests that glycoRNAs engage membrane lectins, immune receptors, and signaling complexes with regulatory consequences distinct from canonical RNA biology. These discoveries position glycoRNAs as previously unrecognized mediators of intercellular communication, immune tuning, and tumor-associated signaling.