基于尿素的罗塔克桑:通过合成脂质双层进行阳离子运输,并对黄金葡萄球菌 (Staphylococcus aureus) 有抗菌活性
Nasim Akhtar1, Udyogi N K Conthagamage1, Sara P Bucher2
1Department of Chemistry, Louisiana State University Baton Rouge LA 70803 USA vglopez@lsu.edu.
Materials advances
|October 10, 2024
概括
带有尿素单元的新型轮素可以选择性地将化物离子穿过脂质双层. 罗塔1对抗耐药细菌表现出强大的抗微生物活性,突出显示了潜在的生物医学应用.
科学领域:
- 超分子化学 超分子化学
- 化学生物学 化学生物学
- 材料科学 材料科学 材料科学
背景情况:
- 阳离子的识别和运输对于生物过程和合成应用至关重要.
- 机械互锁的分子罗塔克桑为分子运输提供了独特的平台.
- 氨酸部分以其结合离子的能力而闻名,特别是化物.
研究的目的:
- 为了合成和评估轮素与选择性化离子运输的尿素单位.
- 调查结构特征和膜环境对罗塔xane 运输效率的影响.
- 探索这些罗塔克桑作为抗菌剂对抗耐药细菌的潜力.
主要方法:
- 具有不同结构特征的罗塔克桑的合成,包括硫尿素单位.
- 通过合成脂质双层进行阳离子运输研究.
- 对*黄金葡萄球菌*进行抗菌检测.
- 脂质体膜流动性的研究.
主要成果:
- 与对照组相比,含有硫尿素单位的罗塔克桑具有显著更高的化物运输效率.
- 罗塔克桑1比罗塔克桑2 (EC50 = 0.736 mol%) 显示出更高的输送活性 (EC50 = 0.243 mol%).
- 运输效率受到膜流动性的影响,流动性增强活性更高.
- 罗塔1与NaCl和阿拉基酸一起表现出协同作用的抗菌作用,对抗耐药性黄金色杆菌.
结论:
- 相互锁定的结构和硫尿素单元对于有效的离子运输至关重要.
- 膜的组成,特别是流动性,在罗他森介导的传输中起着重要作用.
- 罗塔克桑作为抗微生物药物表现有前途,特别是在组合治疗中.
- 本研究提供了用于运输和生物医学应用的先进轮素的设计原则.
相关概念视频
02:33Preparation and Reactions of Thiols
6.0K
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.
6.0K
01:26Radical Substitution: Hydrogenolysis of Alkyl Halides with Tributyltin Hydride
1.8K
Radical substitution reactions can be used to remove functional groups from molecules. The hydrogenolysis of alkyl halides is one such reaction, where the weak Sn–H bond in tributyltin hydride reacts with alkyl halides to form alkanes. Here, the reagent Bu3SnH yields tributyltin halide as a byproduct.
The bonds formed in this reaction are stronger than the bonds broken, making it energetically favorable. The reaction follows a radical chain mechanism similar to radical halogenation...
The bonds formed in this reaction are stronger than the bonds broken, making it energetically favorable. The reaction follows a radical chain mechanism similar to radical halogenation...
1.8K
02:26Preparation and Reactions of Sulfides
4.7K
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.
4.7K
02:17Structure and Nomenclature of Thiols and Sulfides
4.6K
Thiols and sulfides are sulfur analogs of alcohols and ethers, respectively, where the sulfur atom takes the place of the oxygen atom. Thus, thiols are generally represented as RSH, where R is an alkyl substituent and —SH is the functional group. On the other hand, in sulfides, the central sulfur atom is bonded to two hydrocarbon groups on either side. Depending upon the type of group, sulfides can be either symmetrical or asymmetrical. Both thiols and sulfides display a bent geometry,...
4.6K