胚胎piRNAs的目标是刺客虫的水平转移的脊椎动物转位子
Tarcísio Fontenele de Brito1, Maira Arruda Cardoso1, Nazerke Atinbayeva2,3
1Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.
Frontiers in cell and developmental biology
|December 5, 2024
概括
在Rhodnius prolixus中的Piwi相互作用RNAs (piRNAs) 抑制可转移元素,包括从脊椎动物获得的水平转移的转移子. 这项研究揭示了胚胎发生过程中piRNA路径的活性,与siRNA路径不同,以应对这些元素.
科学领域:
- 分子生物学分子生物学
- 基因组学就是基因组学.
- 昆虫科学 昆虫科学 昆虫科学
背景情况:
- 皮维蛋白和piRNAs形成了对可移植元素 (TE) 的基因组监测系统.
- 虽然在Drosophila中得到了很好的研究,但像Rhodnius prolixus这样的基底昆虫中piRNA路径的理解较少.
- 查加斯病的载体Rhodnius prolixus从脊椎动物中获得了水平转移的转体子 (HTT).
研究的目的:
- 为了研究piRNA介导的对Rhodnius prolixus中的居民TE和HTT的反应.
- 分析罗德尼乌斯发育过程中piRNAs的时间动态和特征.
- 为了比较piRNA和siRNA通路对HTTs的反应.
主要方法:
- 小RNA测序 (SmallRNA-Seq) 用于量化piRNAs对TEs和HTTs的映射.
- 对piRNA特征 (1U/10A偏差,乒乓球,分阶段) 和piRNA集群的分析.
- 使用RNA-Seq和qRT-PCR对转子和RP-PIWI基因的基因表达分析.
主要成果:
- 在胚胎发生过程中,piRNA产生的峰值与减少TE和HTT表达相关.
- 居民TE参与了典型的乒乓球放大,而HTTpiRNAs显示了不同的模式.
- 皮RNA路径,而不是siRNA路径,对HTTs做出了反应.
结论:
- 在Rhodnius prolixus中的piRNA通路在抑制TE和最近获得的HTT方面很活跃.
- HTT piRNA 的生物发生和功能可能与常驻 TE 的生物发生和功能不同.
- 这项研究提供了关于医学相关昆虫piRNA进化和基因组防御的见解.
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