hsa-let-7b-5p antagomir

hsa-let-7b-5p antagomirs are chemically-modified oligonucleotides that hybridize with mature miRNAs. The miRNA antagomirs have 2 phosphorothioates at the 5' end, 4 phosphorothioates at the 3' end, 1 cholesterol group at the 3' end, and full-length nucleotide 2'-methoxy modification. The miRNA antagomirs strongly compete with mature miRNAs to prevent the complementary pairing of miRNAs and their target genes, thereby inhibiting miRNAs from functioning. Stability of miRNA antagomirs appears to be significantly higher than miRNA inhibitors, they exhibits enhanced cellular uptake, stability and regulatory activity in vivo.

hsa-let-7b-5p antagomir 是一种经过特殊化学修饰的成熟miRNA的互补单链，全链进行甲氧基修饰，在5'端和3'端分别有2个和4个硫代骨架修饰，并在3'端连接有高亲和性胆固醇修饰。miRNA antagomir通过特异性结合成熟miRNA，阻止miRNA与其靶基因的互补配对，从而抑制miRNA的功能。相比于miRNA inhibitor，miRNA antagomir在动物实验中具有更高的稳定性和抑制效果，更易通过细胞膜、组织间隙而富集于靶细胞。