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Assaying the Kinase Activity of LRRK2 in vitro
Published on: January 18, 2012
致病性LRRK2负面调节微RNA介导的翻译抑制
Stephan Gehrke1, Yuzuru Imai, Nicholas Sokol
1Department of Pathology, Stanford University School of Medicine, Stanford, California 94305, USA. sgehrke@stanford.edu
Nature
|July 31, 2010
概括
氨酸丰富的重复激酶2 (LRRK2) 的功能增益突变通过损害微RNA (miRNA) 途径导致帕金森病. 这导致E2F1/DP的过度生产,导致神经退行,并建议基于miRNA的疗法.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
背景情况:
- 氨酸丰富的重复激酶2 (LRRK2) 的功能获取突变与帕金森病有关.
- 确切的LRRK2病原体背后的分子机制仍然不清楚.
- 目前尚不清楚LRRK2在调节蛋白质合成中的作用及其与微RNAs (miRNAs) 的相互作用.
研究的目的:
- 为了研究LRRK2在帕金森病发病的分子机制.
- 为了确定LRRK2是否与miRNA途径相互作用以调节蛋白质合成.
- 探索潜在的基于miRNA的治疗策略,用于LRRK2相关的帕金森病.
主要方法:
- 利用Drosophila模型研究LRRK2与miRNAs (let-7和miR-184*) 以及它们的标 (e2f1和dpmRNAs) 的相互作用.
- 操纵的miRNA水平和目标响应性,以评估对LRRK2病原发生的影响.
- 研究了LRRK2与RNA诱导沉默复合体 (RISC) 的组成部分的关联,包括阿尔戈诺特蛋白 (dAgo1, hAgo2).
主要成果:
- 致病性LRRK2对抗let-7和miR-184*,导致E2F1/DP的过度产生,这对致病性至关重要.
- 对于let-7或miR-184*功能的遗传或药理学障碍模仿了LRRK2毒性.
- 增加let-7或miR-184*水平改善了LRRK2诱导的致病作用.
- LRRK2与dAgo1和 hAgo2相互作用,对老大脑中的dAgo1水平进行负面调节,并促进-4E-BP1与 hAgo2的关联.
结论:
- 损坏的miRNA通路功能和随后的放松E2F1/DP合成是LRRK2病变发生的关键事件.
- LRRK2与miRNA途径和RISC的相互作用对其神经毒性作用至关重要.
- 这些发现表明,对于LRRK2相关的帕金森病,基于miRNA的新型治疗途径.
相关概念视频
Types of RNA
Overview
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...
MicroRNAs
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...
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...
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...
MicroRNAs
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...
Types of RNA
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in regulating gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA Performs Diverse...
RNA Performs Diverse...
MicroRNAs
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...

