在体内使用"抗体"对微RNA进行沉默
Jan Krützfeldt1, Nikolaus Rajewsky, Ravi Braich
1Laboratory of Metabolic Diseases, The Rockefeller University, 1230 York Avenue, New York, New York 10021, USA.
Nature
|November 1, 2005
概括
化学工程对抗剂有效地使小鼠的内源微RNA (miRNA) 沉默,使体内功能丧失研究成为可能. 这种强大的工具展示了特定的,持久的miRNA沉默,具有潜在的治疗应用.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 生物化学 生物化学
背景情况:
- 微RNAs (miRNAs) 是基因表达的关键调节者,但它们在哺乳动物中的确切功能在很大程度上是未知的.
- 了解miRNA功能需要有效的体内功能丧失模型.
研究的目的:
- 开发和验证一种新型的化学工程寡核酸类,称为抗体,用于有效和特定的静止内源性miRNAs in vivo.
- 通过使用抗体来研究miRNA沉默的生物学意义,重点关注miR-122及其在肝功能和胆固醇生物合成中的作用.
主要方法:
- 在小鼠体内注射针对特定内源性miRNAs (miR-16,miR-122,miR-192,miR-194) 的抗体.
- 在多种组织中量化miRNA水平,以评估沉默效率和持续时间.
- 对抗菌素治疗动物的基因表达分析 (mRNA) 和生物信息分析,以确定受影响的基因标.
- 用抗体胺-122.2治疗的小鼠的血胆固醇水平的测量.
主要成果:
- 反对体证明了在各种小鼠组织中有效,特定和长期减少向的内源性miRNA水平.
- 基因表达分析显示,上调基因的3' UTR中miR-122识别动机的显著丰富,下调基因的枯竭.
- 制miR-122导致对胆固醇生物合成途径的预测效应以及可测量的血胆固醇水平降低.
结论:
- 反对体是一种强大而有效的工具,可以在体内对内源性miRNA进行特定的沉默.
- 这种方法促进了关键的体内功能丧失研究,以阐明miRNA功能.
- 反对体作为涉及miRNA失调的疾病的潜在治疗策略具有前景.
相关概念视频
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RNA 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...
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MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA ends...
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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...
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MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...


