Sci Rep:GBAP1假基因通过海绵miR-22-3p作为葡糖脑苷脂酶基因GBA的ceRNA

2017-11-05 MedSci MedSci原创

编码溶酶体葡糖脑苷脂酶的GBA基因中的突变是帕金森病(PD)发生的主要诱因,且葡糖脑苷脂酶活性的调节是新兴的PD疗法。然而,目前对于调节GBA表达的机制知之甚少。本研究中,研究人员探索了一个涉及表达假基因GBAP1和microRNA的GBA调控网络的存在。GBA和GBAP1之间的高度序列同一性使得假基因成为有希望的竞争性内源性RNA(ceRNA),起着microRNA海绵的作用。选择可能靶向两种转

编码溶酶体葡糖脑苷脂酶的GBA基因中的突变是帕金森病(PD)发生的主要诱因,且葡糖脑苷脂酶活性的调节是新兴的PD疗法。然而,目前对于调节GBA表达的机制知之甚少。

本研究中,研究人员探索了一个涉及表达假基因GBAP1和microRNA的GBA调控网络的存在。GBA和GBAP1之间的高度序列同一性使得假基因成为有希望的竞争性内源性RNA(ceRNA),起着microRNA海绵的作用。选择可能靶向两种转录物的miRNAs后,研究人员证明miR-22-3p结合并下调GBA和GBAP1,并将其内源mRNA水平降低至70%。

此外,GBAP1 3'-非翻译区的过表达能够隔离miR-22-3p,从而增加GBA mRNA和葡糖脑苷脂酶水平。GBAP1剪接的特性鉴定了由无义介导的mRNA衰减下调的多个框外异构体,表明GBAP1的水平以及相应的其ceRNA效应通过该降解过程被明显调节。使用具有GBA突变的PD患者和对照者的皮肤衍生的诱导性多能干细胞,在多巴胺能分化期间可发现GBA明显上调,与miR-22-3p的下调相平行。

总之,该研究结果描述了控制GBA的第一个miRNA,并提示GBAP1非编码RNA起着GBA ceRNA的作用。

原始出处:

Letizia Straniero, Valeria Rimoldi, et al., The GBAP1 pseudogene acts as a ceRNA for the glucocerebrosidase gene GBA by sponging miR-22-3p. Sci Rep. 2017; 7: 12702. Published online 2017 Oct 5. doi: 10.1038/s41598-017-12973-5

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    2018-07-15 般若傻瓜
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    2018-02-14 smallant2002
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    2017-12-13 dangious
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