Nat Commun:前列腺基底细胞分化过程中,miR-205宿主基因的LEADeR角色研究

2019-01-29 AlexYang MedSci原创

最近,有研究人员指出,miR-205的大部分功能还没有鉴定,且它的宿主基因MIR205HG的相关功能完全未知。研究发现,只有低表达的可变剪接MIR205HG转录本作为实际上的pri-miRNAs,该过程涉及了Drosha来消除不利的剪接,并且能够直接调节调控miR-205消除。明显的是,MIR205HG特异性加工过的转录本实际上是作为长非编码RNA来起作用的,并且具有通过对干扰素途径进行调节来调控

最近,有研究人员指出,miR-205的大部分功能还没有鉴定,且它的宿主基因MIR205HG的相关功能完全未知。

研究发现,只有低表达的可变剪接MIR205HG转录本作为实际上的pri-miRNAs,该过程涉及了Drosha来消除不利的剪接,并且能够直接调节调控miR-205消除。明显的是,MIR205HG特异性加工过的转录本实际上是作为长非编码RNA来起作用的,并且具有通过对干扰素途径进行调节来调控人类前列腺基底细胞分化的能力。在分子水平,MIR205HG能够直接结合在靶基因的启动子,这些靶基因在干扰素调控因子(IRF)结合位点临近具有Alu元件;还能够抑制它们的转录活性,这很可能是通过缓冲IRF1的活性实现的,从而最终阻止腔的分化。

最后,研究人员指出,由于MIR205HG在维持前列腺上皮细胞的基本特性方面是从miR-205(虽然是互补的)自主发挥作用的,因此需要重新诠释为LEADeR(长上皮Alu互作分化相关RNA)。

原始出处:

Valentina Profumo, Barbara Forte, Stefano Percio et al. LEADeR role of miR-205 host gene as long noncoding RNA in prostate basal cell differentiation. Nat Commun. 18 January 2019.

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    2019-10-15 liuli5079
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    2019-08-03 liye789132251
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    2019-12-29 smallant2002
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    2019-01-31 wincls
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