A study in humans demonstrated that the mir-550a-5p was upregulated 24 hours post-injury in skin wounds compared to unwounded skin [Siu et al. DOI:10.1111/wrr.13100]. A study in humans demonstrated that the mir-550a-5p was differentially expressed and shared across two pairs of monozygotic twins, as identified through miRNA microarray analysis of blood samples from 18 twin pairs, suggesting its potential role as a biomarker for distinguishing genetically identical individuals [Xiao et al. DOI:10.1016/j.fsigen.2019.05.003].