×

注意!页面内容来自https://www.medchemexpress.cn/oligonucleotides/antisense-oligonucleotides.html,本站不储存任何内容,为了更好的阅读体验进行在线解析,若有广告出现,请及时反馈。若您觉得侵犯了您的利益,请通知我们进行删除,然后访问 原网页

Antisense Oligonucleotides  (反义寡核苷酸)

反义寡核苷酸(ASOs)通常指的是短小的、人工合成的单链DNA或RNA(13至30个核苷酸)。在与靶向的mRNA或前体mRNA结合后,ASOs通过多种不同的机制调节RNA的功能。 1. 反义寡核苷酸(ASOs)能够形成一种RNA-DNA的杂合体,该杂合体成为RNaseH的作用底物,从而导致靶mRNA的降解。 2. 反义寡核苷酸(ASOs)能够通过阻断核糖体机器的立体结构来调节基因表达,这可能导致表达量降低、剪接方式的改变以及功能性蛋白质的恢复。 3. 反义寡核苷酸(ASOs)与前体mRNA的结合能够改变剪接因子的募集情况,并调控剪接过程。 反义寡核苷酸(ASOs)的首次体内应用显示出有限的临床潜力,这是因为未修饰的磷酸核糖骨架上的ASO易受内切核酸酶和外切核酸酶的快速降解作用影响。骨架和糖分子的修饰使ASO更具亲和力和稳定性。磷酰亚胺胺糖醛酸寡聚体(PMO)对核酸酶和蛋白酶的降解具有很强的抵抗力,主要用于剪接调节或翻译抑制。在核糖环的 2' 位置进行化学修饰,如 2'-O-甲基(2'-O-me)、2'-氟(2'-F)、2'-O-甲氧基乙基(2'-MOE),使得寡核苷酸能够采用类似于RNA的 C3'-内糖构象,从而使其具有热稳定性。

Antisense Oligonucleotides (ASOs) usually refer to shortsyntheticsingle-stranded DNA or RNA (13-30 nucleotides). Following binding to the targeted mRNA or pre-mRNAASOs modulates RNA function by several different mechanisms.

1. ASOs can form an RNA–DNA hybrid that becomes a substrate for RNase Hresulting in target mRNA degradation.

2. ASOs can modulate gene expression via steric block of the ribosomal machinerywhich can lead to reduced expressionmodulation of splicing and/or restoration of a functional protein.

3. Binding of ASOs to pre-mRNA can alter splicing factor recruitment and regulate splicing events.

The first in vivo applications of ASOs showed limited clinical potential because of the high susceptibility of ASOs with an unmodified phosphoribose backbone to rapid degradation by endonucleases and exonucleases. The modifications in backboneand sugar molecules give ASOs more affinity and stability. Phosphorodiamidate morpholino oligomers (PMO) are very resistant to nuclease and protease degradation and are mostly used in splicing modulation or translation inhibition. Chemical modifications at 2' position of ribose sugar ring such as 2’-O-methyl (2’-O-me)2’-Fluoro (2’-F)2’-O-methoxyethyl (2’-MOE) allow oligonucleotide to adopt RNA like C3’-endo sugar puckermaking it thermally stable.

Antisense Oligonucleotides (600):

Cat. No. Product Name CAS No. Purity Chemical Structure

您的账户在别处登录,如果非您本人行为
请重置密码!

我们的 Cookie 政策

我们使用 Cookies 和类似技术以提高网站的性能和提升您的浏览体验,部分功能也使用 Cookies 帮助我们更好地理解您的需求,为您提供相关的服务。 如果您有任何关于我们如何处理您个人信息的疑问,请阅读我们的《隐私声明》