Long-term, efficient inhibition of microRNA function in mice using rAAV vectors.

Long-term, efficient inhibition of microRNA function in mice using rAAV vectors.
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DOI:
10.1038/nmeth.1903
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发表时间:
2012-03-04
期刊:
影响因子:
48
通讯作者:
Gao, Guangping
Gao, Guangping
中科院分区:
生物学1区
文献类型:
--
作者:
Xie, Jun;Ameres, Stefan L.;Friedline, Randall;Hung, Jui-Hung;Zhang, Yu;Xie, Qing;Zhong, Li;Su, Qin;He, Ran;Li, Mengxin;Li, Huapeng;Mu, Xin;Zhang, Hongwei;Broderick, Jennifer A.;Kim, Jason K.;Weng, Zhiping;Flotte, Terence R.;Zamore, Phillip D.;Gao, Guangping

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了解小鼠中单个microRNA(miRNA)种类的功能需要产生数百种功能丧失菌株。为了加速哺乳动物中miRNA生物学的分析,我们将重组腺相关病毒(rAAV)载体与miRNA“坚韧诱饵”(TuD)组合以抑制特异性miRNA。静脉内注射表达抗miR-122或抗let-7 TuD的rAAV 9耗尽相应的miRNA并增加其mRNA靶标。在野生型小鼠中,产生抗miR-122而非抗let-7-TuD的rAAV使血清胆固醇降低>30%持续25周。来自经处理小鼠的肝脏miRNA的高通量测序证实靶向miRNA被耗尽,并揭示TuD RNA在体内诱导miRNA加尾和修剪。因此,rAAV介导的miRNA抑制提供了一种简单的方法来研究成年哺乳动物中的miRNA功能,并为由miRNA失调引起的血脂异常和其他疾病提供了潜在的治疗方法。
Understanding the function of individual microRNA (miRNA) species in mice would require the production of hundreds of loss-of-function strains. To accelerate analysis of miRNA biology in mammals, we combined recombinant adeno-associated virus (rAAV) vectors with miRNA `Tough Decoys' (TuDs) to inhibit specific miRNAs. Intravenous injection of rAAV9 expressing anti-miR-122 or anti-let-7 TuD depleted the corresponding miRNA and increased its mRNA targets. rAAV producing anti-miR-122—but not anti-let-7—TuD reduced serum cholesterol by >30% for 25 weeks in wild-type mice. High throughput sequencing of liver miRNAs from the treated mice confirmed that the targeted miRNAs were depleted and revealed that TuD RNAs induce miRNA tailing and trimming in vivo. rAAV-mediated miRNA inhibition thus provides a simple way to study miRNA function in adult mammals and a potential therapy for dyslipidemia and other diseases caused by miRNA deregulation.
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