Inflammatory bowel disease (IBD) is impacted by genetic, environmental and immunological factors, where the imbalance in T-cell immune responses significantly promotes its progression. In recent years, the role of RNA modifications in epigenetic regulation has caught significant attention in research; among these, N4-acetylcytidine (ac4C) is the only acetylation process in RNA and plays a role in several biological processes, but its implication in the functioning of immune cells is largely unknown to date.