Multiple miRNAs jointly regulate the biosynthesis of ecdysteroid in the holometabolous insects, Chilo suppressalis.

Multiple miRNAs jointly regulate the biosynthesis of ecdysteroid in the holometabolous insects, Chilo suppressalis.
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多个miRNA共同调控全变态昆虫二化螟蜕皮激素的生物合成

DOI:
10.1261/rna.061408.117
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发表时间:
2017-12
期刊:
RNA (New York, N.Y.)
影响因子:
--
通讯作者:
Han Z
Han Z
中科院分区:
其他
文献类型:
--
作者:
He K;Sun Y;Xiao H;Ge C;Li F;Han Z

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活性激素的准确升降对昆虫的发育具有重要意义。蜕皮激素必须及时清除。然而,在适当的时间抑制蜕皮甾类生物合成的机制仍不清楚。在这里,我们对二化螟的小RNA文库进行了测序,并在这种臭名昭著的水稻害虫中鉴定了300个miRNAs。微阵列分析得到54个在变态发育过程中差异表达的miRNAs。靶点预测和体外双荧光素酶检测证实,7个miRNAs(2个保守的miRNAs和5个新的miRNAs)共同靶向蜕皮激素生物合成途径中的3个Halloween基因。这7种miRNA的过表达降低了20-羟基蜕皮激素(20 E)的滴度,诱导死亡率,并延缓发育,这可以通过20 E治疗来挽救。比较分析表明,miRNA调控变态发育是一个保守的过程,但参与的miRNA是高度分化的。总之,我们提出的证据表明,保守的和谱系特异性的miRNA在调节昆虫的发育中起着至关重要的作用,通过控制蜕皮甾体的生物合成,这是重要的,以确保发展的收敛性和进化的多样性。
The accurate rise and fall of active hormones is important for insect development. The ecdysteroids must be cleared in a timely manner. However, the mechanism of suppressing the ecdysteroid biosynthesis at the right time remains unclear. Here, we sequenced a small RNA library of Chilo suppressalis and identified 300 miRNAs in this notorious rice insect pest. Microarray analysis yielded 54 differentially expressed miRNAs during metamorphosis development. Target prediction and in vitro dual-luciferase assays confirmed that seven miRNAs (two conserved and five novel miRNAs) jointly targeted three Halloween genes in the ecdysteroid biosynthesis pathway. Overexpression of these seven miRNAs reduced the titer of 20-hydroxyecdysone (20E), induced mortality, and retarded development, which could be rescued by treatment with 20E. Comparative analysis indicated that the miRNA regulation of metamorphosis development is a conserved process but that the miRNAs involved are highly divergent. In all, we present evidence that both conserved and lineage-specific miRNAs have crucial roles in regulating development in insects by controlling ecdysteroid biosynthesis, which is important for ensuring developmental convergence and evolutionary diversity.
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DOI: 10.1111/1744-7917.12343
发表时间: 2016-06-01
期刊: INSECT SCIENCE
影响因子: 4
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发表时间: 2015
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DOI: 10.1073/pnas.0907391106
发表时间: 2009-12-22
影响因子: 11.1
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通讯作者: Belles, Xavier
DOI: 10.1016/j.cub.2008.06.020
发表时间: 2008-07-08
期刊: CURRENT BIOLOGY
影响因子: 9.2
作者:
Caygill, Elizabeth E.;Johnston, Laura A.
通讯作者: Johnston, Laura A.