hsa-mir-554: Hsa-mir-554 is a microRNA that was used as a primer in a study [PMC7043771]. In the study, several microRNAs, including hsa-mir-554, hsa-miR-601, hsa-miR-325, hsa-miR-103b, and hsa-miR-628-3p, were observed more clearly than others [PMC8217230]. Other microRNAs that were identified in the study included hsa-mir-1178, hsa-mir-1276, hsa-mir-197, hsa-mir-217, hsa-mir-485-3p, and more [PMC6794874]. Additionally, 12 aberrant miRNAs were identified in plasma from patients with sleep disorder: hsa-mir-1267, hsa-miR4309,h sa mir 554,h sa mi R1272,h sa mi R4501,h sa mi R1823p,h sa mi R6255p,h sa mi R1005p,h sa mi R125b5p,h sa mir 1973p,h sa mir 4522 andh sami r4935 p [PMC4690823]. These aberrant miRNAs showed either up-regulation or down-regulation in peripheral blood samples [PMC4690823]. Furthermore,qRT PCR validation showed that some of these aberrant miRNAs had significantly high expression (hsa mir1267 ,hsa mir4309 ,hsa mir554 ,hsa mir1272 ,hsa mir4501 ,hsa mir1823 p) while others had significantly low expression (hsa mIR6255 p ,h samIR1005 p ,h samIR125b5 p ,h samIR1973 p) in peripheral blood samples [PMC4690823].