哺乳动物RNAi技术MammalianRNAInterference
Mammalian RNA InterferenceThomas TuschlLaboratory for RNA Molecular BiologyThe Rockefeller University, New York Excerpted from RNAi: A Guide To Gene Silencing Edited by Gregory J. HannonABSTRACTA series of protocols is presented for targeting endogenous genes in mammalian somatic cells.PROTOCOL 1: SELECTION OF SIRNA SEQUENCESTo target a specific mRNA for degradation, a portion of the mRNA target sequen......阅读全文
哺乳动物RNAi技术－Mammalian－RNA－Interference
Mammalian RNA InterferenceThomas TuschlLaboratory for RNA Molecular BiologyThe Rockefeller University, New York Excerpted from RNAi: A Guide To Gene S
RNA干涉(RNA－Interference，RNAi)（1）
基因沉默（gene silencing）是生物体内特定基因由于种种原因不表达的遗传现象。一方面，基因沉默是生物遗传操作创造新的遗传修饰生物（genetically modified organisms）的障碍，另一方面，它又是植物抵抗外来核酸入侵（如病毒）的一种反应，为植物抗病毒的遗传育
RNA干扰技术(RNA－interference，RNAi)
1995年，康乃尔大学的Su Guo博士在试图阻断秀丽新小杆线虫（C. elegans）中的par-1基因时，发现了一个意想不到的现象。她们本是利用反义RNA技术特异性地阻断上述基因的表达，而同时在对照实验中给线虫注射正义RNA（sense RNA）以期观察到基因表达的增强。但得到的结果
RNA干涉(RNA－Interference，RNAi)（2）
早期的 RNAi 技术可用在研究与胚胎发育相关基因的功能上，但是由于细胞分裂造成 dsRNA 的稀释，使得这种方法在研究成体的基因功能时有一定的局限性。为弥补早期 RNAi 技术的不足，Tavernarakis 等将 RNAi 技术做了一些改进及更动，将目的基因之标的序列以反向重复的方式，由
反义技术——RNA干扰（RNA－interference，RNAi）
最近由于RNA干扰（RNA interference，RNAi）的发现使反义领域的研究增多。这种自然发生的现象最早是在秀丽线虫中发现的（1），是序列特异性地使转录后的基因沉默的有力机制。由于最近两年在RNAi领域取得的进步，已经有许多这方面的综述发表（2-4）。RNA干扰是由长的双链 RNA
Rules－of－siRNA－design－for－RNA－interference－(RNAi)
General GuidelinessiRNA targeted sequence is usually 21 nt in length.Avoid regions within 50-100 bp of the start codon and the termination codonAvoid
RNA干扰（RNA－interference，RNAi）基础知识(2)
1RNA i的发现RNA i是在研究秀丽新小杆线虫（C. elegans）反义RNA （antisenseRNA ）的过程中发现的，由dsRNA 介导的同源RNA 降解过程。1995年，Guo等发现注射正义RNA （senseRNA ）和反义RNA 均能有效并特异性地抑制秀丽新小杆线虫par
RNA干扰（RNA－interference，RNAi）基础知识(3)
SiRNASmall interfering RNA (siRNA)：是一种小RNA分子（~21-25核苷酸），由Dicer（RNAase Ⅲ家族中对双链RNA具有特异性的酶）加工而成。SiRNA是siRISC的主要成员，激发与之互补的目标mRNA的沉默。ShRNAshRNA 短发夹RNAshRNA
RNA干扰（RNA－interference，RNAi）基础知识(1)
Rnai最近由于RNA 干扰（RNA interference，RNA i）的发现使反义领域的研究增多。这种自然发生的现象最早是在秀丽线虫中发现的（1），是序列特异性地使转录后的基因沉默的有力机制。由于最近两年在 RNA i领域取得的进步，已经有许多这方面的综述发表（2-4）。RNA 干扰是
RNAi原理图解
The Mechanism of RNA Interference (RNAi)Long double-stranded RNAs (dsRNAs; typically >200 nt) can be used to silence the expression of target genes in
哺乳动物细胞(mammalian－cell)总RNA的分离2
3）于0℃以5000g离心10分钟沉淀RNA，弃上清，用含0.1mol/L 乙酸钠（pH5.2）的70％乙酸洗涤沉淀，用自动微量移液器尽可能将乙醇吸尽， 随后于室温放置几分钟，晾干沉淀。切勿抽干沉淀，因为干的核酸沉淀很难溶解。4）每个直径为90mm的培养皿或每107细胞加 200μl 50mmol/
哺乳动物细胞(mammalian－cell)总RNA的分离1
哺乳动物细胞总ＲＮＡ的分离细胞的裂解提取步骤注意事项这一从培养的单层哺乳动物细胞中分离RNA的实验程序系为Favaloro 等（1980）所介绍程序的改良。该程序同样适用于从悬浮培养的哺乳动物细胞中或从易于分散成单个细胞的哺乳动物组织中分离 RNA。但不适用于从固体组织中提取RNA，因为用这
Differential－Interference－Contrast
Differential Interference Contrast (Nomarski, DIC, Hoffman Modulation Contrast)PrincipleDifferential interference microscopy requires several optical
Examination－of－a－Mammalian－Blood－Smear
Examination of a Mammalian Blood SmearThe distribution and appearance of the formed elements of blood can tell a great deal about the condition of the
Dicer－Pathway
The degradation of endogenous mRNA in a sequence-specific manner can be induced by dsRNA [RNA interfernce (RNAi)], antisense transcription, or viral i
Transfection－of－Mammalian－Cells－Using－Lipofectamine
Materials: LipofectamineBasal Medium containing 10% fetal bovine serum, 1% glutamine, 1% aaBasal Medium containing 1% glutamineBasal Medium cont
Freezing－and－Thawing－of－Mammalian－Cell－Lines
For long term storage of myeloma cells, hybridoma cells, T cells, and other mammalian cell lines in liquid nitrogen, and restoring them in culture.Fre
通过RNAi使基因特异性沉默
RNA interference (RNAi) is a phenomenon in which the introduction of double-stranded RNA (dsRNA) into a diverse range of organisms and cell types caus
RNAi的作用机制及siRNA的合成方法（二）
2.3 倍增阶段 siRNA在RNA依赖性RNA聚合酶(RdRP)的作用下，以mRNA为模板，siRNA为引物，扩增产生足够数量的dsRNA作为底物提供给Dicer酶，产生更多的siRNA， 可再次形成RISC，并继续降解mRNA，从而产生级联放大效应。并作用于靶mRNA。如此反复
Steps－in－the－Glycosylation－of－Mammalian－Nlinked－Oligosaccarides
The biosynthesis pathway of N-glycans is a costly system with respect to the number of enzymes that are involved in the synthesis and trimming of N-gl
哺乳动物RNAi技术全面实验方法
WHENVIRUSESINFECTEUKARYOTICCELLSdomly integrate into host genomes, double-stranded RNA (dsRNA) is frequently produced from the invading genes, either
RNAi－protocol
siRNA protocolsOur current strategy with siRNA is to synthesis relatively small amounts enzymatically and use these to test for efficiency by western
NAi－protocol
siRNA protocolsOur current strategy with siRNA is to synthesis relatively small amounts enzymatically and use these to test for efficiency by western
Genomic－DNA－Extraction－－PureLink™
实验概要The PureLink™ Genomic DNA Purification Kit allows rapid and efficient purification of genomic DNA. The kit is designed to efficiently isolate g
RNAi术语表
RNAi GlossaryDicer - Dicer is a member of the RNase III family of nucleases that specifically cleave double-stranded RNAs. Dicer processes long dsRNA
RNAi相关的名词解释[英文]
Argonaute - A family of proteins containing multiple domains and involved in RNA interference (RNAi). Argonatue is the main component of RNAi effector
SiRNA用户指南
Selection of siRNA duplexes from the target mRNA sequenceUsing Drosophila melanogaster lysates (Tuschl et al. 1999), we have systematically analyzed t
siRNA用户手册
The siRNA user guide (revised May 6, 2004) Selection of siRNA duplexes from the target mRNA sequenceUsing Drosophila melanogaster lysates (Tuschl et
细胞化学词汇RNA干扰
中文名称：RNA干扰外文名称：RNA interference定 义：RNA干扰（RNA interference，RNAi）是指在进化过程中高度保守的、由双链RNA（double-stranded RNA，dsRNA）诱发的、同源mRNA高效特异性降解的现象。分 类：基因沉
RNAi片段siRNA设计原则
RNAi target selection rules:Targeted regions on the cDNA sequence of a targeted gene should be located 50-100 nt downstream of the start codon (ATG).S