mmu-mir-22: mmu-mir-22 is a microRNA implicated in the regulation of genes during C2C12 cell differentiation, as evidenced by its predicted regulation of the gene Arfip2 and its upregulation during the differentiation process [PMC3753644]. Although initial target predictions using TargetScan did not identify Arfip2 as a target, subsequent experiments confirmed mmu-mir-22's regulatory role [PMC3753644]. Co-transfection experiments demonstrated that mmu-mir-22 could reduce luciferase activity by 1.7-fold, indicating its potential to modulate gene expression [PMC3753644]. Furthermore, mmu-mir-22 was found to regulate other genes such as Wasf1, Arpc5, and Nr3c1 [PMC3753644]. In addition to its role in cell differentiation, mmu-mir-22 expression is altered following treatment with antipsychotic drugs such as haloperidol and olanzapine in mice [PMC5068884], [PMC3622003]. A comprehensive analysis of predicted targets for mmu-mir-22 identified 2902 potential targets including 15 ion channel-associated proteins using miRanda and microRNA.org with good mirSVR scores [PMC4668358]. The miRNA's involvement extends to responses to UVB irradiation where it was found upregulated post-treatment [PMC3597329], highlighting its diverse regulatory functions. The last sentence regarding miRTarBase Release 7.0 has been removed due to lack of specific evidence supporting the use of this database version and modifications for accuracy in target identification.