hsa-mir-15b: Hsa-mir-15b is a microRNA that has been studied in relation to its expression in CD34+ HSCs [PMC4669904]. One study found that the expression of Sall4, a transcription factor, was inversely correlated with the expression of hsa-mir-15b and hsa-miR-219-5p in CD34+ HSCs [PMC4669904]. Another study evaluated the performance of different miRNAs as potential biomarkers and found that hsa-mir-15b had an area under the ROC curve (AUROC) of 0.726 [PMC9279521]. The AUROC is a measure of how well a biomarker can distinguish between different groups, with values closer to 1 indicating better performance [PMC9279521]. The study also reported AUROC values for other miRNAs, such as hsa-mir-200c (0.784), hsa-mir-141 (0.894), and hsa-mir-16-2 (0.752) [PMC9279521]. These findings suggest that hsa-mir-15b may play a role in regulating gene expression in CD34+ HSCs and could potentially be used as a biomarker for certain conditions or diseases [PMC4669904] [PMC9279521]. However, further research is needed to fully understand its function and potential clinical applications [PMC4669904] [PMC9279521].

MIR15B: MIR15B is a microRNA that has been studied in the context of aerobic exercise and apoptosis regulation. One study found that MIR15B expression decreased after 6 weeks of aerobic exercise [PMC9811960]. Additionally, MIR15B, along with miR100, miR101, miR20a, miR92a, and miR132, is involved in priming apoptosis by targeting inhibitors of the intrinsic apoptosis pathway [PMC7123062]. MiR101 specifically regulates the formation of Rab1a [PMC7123062]. These findings suggest that MIR15B plays a role in both exercise-induced changes and apoptosis regulation.