集成的化和实验性选识别了新型配体,这些配体向前体microRNA-31在裂裂部位
Grace Arhin1, Lily Haghpassand2, Sarah C Keane1,2
1Biophysics Program, University of Michigan USA sckeane@umich.edu.
RSC medicinal chemistry
|August 6, 2025
概括
研究人员确定了与microRNA-31前体 (pre-miR-31) 结合的小分子,可能抑制其成熟. 这一发现为向与改变的微RNA-31水平相关的癌症提供了新的策略.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 药物发现 药物发现 药物发现
背景情况:
- 微RNAs (miRNAs) 调节基因表达,它们的失调与包括癌症在内的各种疾病有关.
- 变化的microRNA-31 (miR-31) 含量与几种类型的癌症有关.
- 用小分子准前体结构 (miR-31前体) 是一种控制miR-31成熟的策略.
研究的目的:
- 通过虚拟查方法探索前-miR-31结构的药用性.
- 确定可以与前-miR-31结合并可能调节其功能的小分子.
- 从化学数据库中建立一种可通用的方法来发现RNA结合配体.
主要方法:
- 结构引导的虚拟选与miR-31前的碎片库对比.
- 顶级虚拟查候选人的实验性表征.
- 异核单量子连贯性 (HSQC) NMR光谱学用于分析RNA-连接体复合体.
- 化学结构相似性搜索以确定额外的结合剂.
主要成果:
- 已经确定了与前-miR-31结合的几个化合物.
- 发现三种化合物与前-miR-31的Dicer裂变部位结合,这表明Dicer处理的潜在抑制.
- 通过相似性搜索,通过相似或改进的结合亲和力确定了额外的前-miR-31结合剂.
结论:
- 该研究表明,通过虚拟查和随后的实验验证,确定RNA结合配体的可行方法.
- 针对miR-31前的已确定化合物为与miR-31失调相关的癌症提供了潜在的治疗策略.
- 开发的方法可用于发现其他RNA标的配体.
相关概念视频
02:15Experimental RNAi
6.3K
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...
6.3K
01:22MicroRNAs
3.1K
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...
3.1K
01:23RNA Interference
26.4K
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...
26.4K
02:30siRNA - Small Interfering RNAs
17.0K
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...
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...
17.0K
02:57piRNA - Piwi-interacting RNAs
7.0K
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...
7.0K