This research reveals how an abnormal RNA molecule called circRIMS2 contributes to Alzheimer’s disease by damaging brain synapses and impairing memory. Scientists found that circRIMS2 levels are elevated through a chemical modification called m6A methylation, and this causes a cascade of events leading to the destruction of important proteins needed for brain communication. The study shows that blocking this damaging pathway using a specially designed peptide can restore memory and synaptic function in Alzheimer’s disease models, offering hope for new therapeutic approaches.