A study in humans demonstrated that the mir-150 was lowly expressed and did not show the expected specificity for peripheral blood identification when evaluated as a body fluid-specific miRNA marker [Li et al. DOI:10.1016/j.fsigen.2024.103180]. A study in mice demonstrated that the mir-150 exhibits a radiation dose-dependent decrease in serum and whole blood, serving as the radiation-sensitive analyte in a biodosimetry assay with a dose resolution of ±0.5 Gy in the 0.5 to 3.5 Gy gamma ray range [Yadav et al. DOI:10.1126/scitranslmed.aaw5831]. In human studies, plasma levels of the mir-150 were found to be substantially lower in patients with atrial fibrillation, showing approximately 17-fold and 20-fold reductions in paroxysmal and persistent AF, respectively, and its reduced expression was independently associated with the disease [Liu et al. DOI:10.1371/journal.pone.0044906].