相关实验视频
Updated: Jul 13, 2025

13:19
Chemical Triphosphorylation of Oligonucleotides
Published on: June 2, 2022
3.4K
具有线性二硫化物促进性的原药类型三聚原核酸对减少环境的反应
Norihito Sugimoto1, Junsuke Hayashi1, Ryohei Funaki1
1Department of Bioorganic Chemistry, Faculty of Pharmacy, Osaka Medical and Pharmaceutical University, 4-20-1 Nasahara, Takatsuki, Osaka, 569-1094, Japan.
Chembiochem : a European journal of chemical biology
|October 15, 2023
概括
新的线性二硫酸三寡核酸 (PTE ONs) 显示了转化和细胞吸收的改善. 这些修饰的反感性寡核酸 (AONs) 显示出增强的核酶抗性和治疗应用的潜力.
科学领域:
- 橄核酸的化学成分
- 反意义技术是一种反意义技术.
- 药物输送系统是药物输送系统.
背景情况:
- 反感性寡核酸 (AON) 对于治疗应用至关重要.
- 以前的循环二硫酸三聚改性寡核酸 (循环SS PTE ONs) 呈现低转化率和弱反感性活性.
- 提高AON的稳定性和有效性仍然是药物开发中的一个关键挑战.
研究的目的:
- 合成和评估线性二硫酸三寡核酸 (线性SS PTE ONs),以改善转化和反感性活性.
- 阐明对线性SS PTE ONs有效转换的结构要求.
- 评估新型线性SS PTE ONs的核酶耐药性,细胞吸收和敲击效率.
主要方法:
- 合成各种线性SS PTE ONs具有不同的促进性.
- 在降低条件下对汇率的评估.
- 与未经修改的寡核酸相比,核酶耐药性的评估.
- 通过内细胞分裂 (endocytosis) 调查细胞吸收机制.
- 在细胞模型中测量反感知活性 (基因淘汰).
主要成果:
- 确定了对线性SS PTE ONs高效转换的结构要求.
- 与未经修改的ON相比,线性SS PTE ON表现出高达4.8倍的核酶抗性.
- 有效的细胞吸收被观察到通过内细胞结合而无需转染试剂.
- 与周期性SS PTE间隙AON相比,线性SS PTE间隙AON显示出略有增强的淘汰活动.
结论:
- 线性SS PTE ON提供了比周期性SS PTE ON更好的转换率和稳定性.
- 修改后的AON的转化率似乎与它们的反意义活动相关.
- 这些发现表明线性SS PTE ONs作为反感性治疗的有前途平台的潜力.
相关概念视频
Preparation and Reactions of Thiols
6.3K
Thiols are prepared using the hydrosulfide anion as a nucleophile in a nucleophilic substitution reaction with alkyl halides. For instance, bromobutane reacts with sodium hydrosulfide to give butanethiol.
6.3K
Preparation and Reactions of Sulfides
4.9K
Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.
4.9K
Prodrugs
2.6K
Prodrugs are a class of pharmaceutical compounds that undergo a biotransformation process within the body to be converted into a pharmacologically active drug. Prodrugs are designed to improve the therapeutic properties of the parent drug, such as enhancing bioavailability, increasing stability, or reducing toxicity. The concept of prodrugs revolves around modifying the chemical structure of the original drug to make it more effective or convenient for administration.
Prodrugs help overcome...
Prodrugs help overcome...
2.6K
Phase I Reactions: Reductive Reactions
211
Phase I biotransformation reductive reactions are chemical processes that modify drugs by introducing or revealing polar functional groups via reduction. Enzymes called reductases catalyze these reactions, playing a pivotal role in drug metabolism by transforming lipophilic drugs into more polar, water-soluble metabolites for easy excretion. An essential type of reductive reaction is the carbonyl group reduction, where aldehydes and ketones are reduced to alcohols. An example is the...
211
Phosphodiester Linkages
100.1K
Overview
Phosphodiester bond forms when a phosphoric acid molecule (H3PO4) links with two hydroxyl groups (–OH) of two other molecules, forming two ester bonds. Two water molecules are released in this process. The phosphodiester bond is commonly found in nucleic acids (DNA and RNA) and plays a critical role in their structure and function.
Phosphodiester Bonds Link Nucleotides Together
DNA and RNA are polynucleotides or long chains of nucleotides that are linked together. A nucleotide is...
Phosphodiester bond forms when a phosphoric acid molecule (H3PO4) links with two hydroxyl groups (–OH) of two other molecules, forming two ester bonds. Two water molecules are released in this process. The phosphodiester bond is commonly found in nucleic acids (DNA and RNA) and plays a critical role in their structure and function.
Phosphodiester Bonds Link Nucleotides Together
DNA and RNA are polynucleotides or long chains of nucleotides that are linked together. A nucleotide is...
100.1K
Drug Metabolism: Phase II Reactions
3.9K
Phase II reactions are essential for the detoxification and elimination of drugs from the body. These reactions involve the conjugation of parent drugs or their phase I metabolites with endogenous molecules, resulting in more hydrophilic drug conjugates. The primary conjugation reactions in this phase are sulfation and glucuronidation. Both sulfation and glucuronidation typically produce biologically inactive metabolites. However, in some cases involving prodrugs, active metabolites may be...
3.9K

