相关实验视频
Updated: May 12, 2026
08:30
RNAi Interference by dsRNA Injection into Drosophila Embryos
Published on: April 11, 2011
德洛索菲拉毛RNA路径产生内源的短干扰RNAs
Katsutomo Okamura1, Wei-Jen Chung, J Graham Ruby
1Sloan-Kettering Institute, Department of Developmental Biology, 521 Rockefeller Research Laboratories, 1275 York Avenue, Box 252, New York, New York 10065, USA.
Nature
|May 9, 2008
概括
短干扰RNAs (siRNAs) 被认为是Drosophila中不可用的. 然而,这项研究揭示了源自毛RNA基因 (hpRNAs) 的内源性siRNAs调节基因表达,挑战了以前的假设.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 在RNA生物学,RNA生物学.
背景情况:
- 短干扰RNAs (siRNAs) 被认为在Drosophila中对宿主基因调节无关紧要.
- 缺少siRNA路径关键组件 (Dicer-2,Argonaute 2) 的突变体表现出正常的生存能力,这表明冗余性.
- 在此之前,还没有发现内源性Drosophila siRNAs.
研究的目的:
- 为了调查在Drosophila.内源性siRNAs的存在和功能.
- 描述drosophila中siRNA生成和目标抑制的机制.
- 探索小RNA分类和内源性RNA干扰的复杂性.
主要方法:
- 对毛RNA基因 (hpRNAs) 和它们衍生的小RNAs的分析.
- 使用正规的RNA干扰 (RNAi) 和microRNA (miRNA) 途径因子.
- 在目标转录抑制中siRNA大小和功能的表征.
主要成果:
- 在Drosophila中从hpRNAs生成的siRNAs的识别.
- 证明这些siRNAs编程切片复合体来抑制内源转录.
- 涉及Dicer-2,Hen1,Argonaute 2和Loquacious的混合途径的表征,以产生~21核类siRNAs.
结论:
- 内源性siRNAs通过hpRNA通路在Drosophila基因调节中发挥作用.
- 这一途径代表了一种结合RNAi和miRNA因子的新机制.
- 这些发现揭示了小RNA分类和Drosophila内源性RNA干扰的意想不到的复杂性.
相关概念视频
01:23RNA Interference
RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
01:23RNA Interference
RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
02:30siRNA - Small Interfering RNAs
Small interfering RNAs, or siRNAs, are short regulatory RNA molecules that can silence genes post-transcriptionally, as well as the transcriptional level in some cases. siRNAs are important for protecting cells against viral infections and silencing transposable genetic elements.
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the ATP-dependent...
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the ATP-dependent...
02:57piRNA - Piwi-interacting RNAs
PIWI-interacting RNAs, or piRNAs, are the most abundant short non-coding RNAs. More than 20,000 genes have been found in humans that code for piRNAs while only 2000 genes have been found for miRNAs. piRNAs can act at the transcriptional and post-transcriptional levels and have a vital role in silencing transposable elements present in germ cells. They are also involved in epigenetic silencing and activation. Previously, they were thought to function only in germ cells but new evidence suggests...
02:15Experimental RNAi
RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...
02:30Small interfering RNAs (siRNA)
Small interfering RNAs, or siRNAs, are short regulatory RNA molecules that can silence genes post-transcriptionally, as well as the transcriptional level in some cases. siRNAs are important for protecting cells against viral infections and silencing transposable genetic elements.
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the ATP-dependent...
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the ATP-dependent...