A review of human studies identified 197 miRNAs associated with wound healing, burn healing, and scarring, with specific expression changes in human skin tissue and cells post-burn and in hypertrophic scars [Siu et al. DOI:10.1111/wrr.13100]. A study in Wistar rats demonstrated that the miR-504-3p in plasma exosomes shows an increasing trend within 30 minutes post-acute myocardial infarction (AMI) and was used to construct a high-precision AMI identification model [Zhou et al. DOI:10.007/s00414-025-03583-2].