A study in human plasma demonstrated that hsa-miR-27a-3p was upregulated in patients with mild traumatic brain injury (TBI) compared to healthy controls [Qin et al. DOI:10.1371/journal.pone.0204051]. Conversely, a review of human skin tissue found hsa-miR-27a was downregulated in deep partial thickness burn skin four days post-burn and in skin wounds 24 hours post-injury [Siu et al. DOI:10.1111/wrr.13100].