由骨架衍生的抗菌皇冠乙醇/银离子复合体,具有容易的两性
Qingsheng Wang1, Wen Huang2, Qian Sun2
1Orthopedics Department, General Hospital of Pingmei Shenma Group, Pingdingshan 467000, China.
Soft matter
|February 24, 2025
概括
一种新的D-CA6-CE/Ag+复合体显示出强大的抗菌活性对常见的病原体. 这种以银为基础的材料在治疗细菌感染方面,与银硫法迪亚相比,具有更高的疗效和更低的毒性.
科学领域:
- 纳米技术纳米技术
- 材料科学 材料科学 材料科学
- 药用化学 医学化学
背景情况:
- 银化合物以抗菌特性而闻名,但受到生物毒性的限制.
- 开发更安全,更有效的基于银的抗微生物药物对于治疗细菌感染至关重要.
研究的目的:
- 设计和合成一种由骨衍生而来的新型面部两银复合物 (D-CA6-CE/Ag+).
- 为了评估与银硫法迪亚辛相比,新型复合物的抗菌活性和生物毒性.
主要方法:
- 合成了一种树枝状分子D-CA6-CE,用于银离子化,其中包含皇冠以太部分.
- 在水溶液中的D-CA6-CE/Ag+自组装成纳米粒的特征.
- 对抗大肠杆菌和黄金菌的最低抑制度 (MIC) 的确定.
- 血液溶解和细胞毒性的评估,以评估生物安全性.
主要成果:
- D-CA6-CE/Ag+自组装成纳米细胞,显著降低银离子MIC至6.13μg mL-1 (*E. coli*) 和7.33μg mL-1 (*S. aureus*).
- 与银硫法相比,该复合物表现出优越的抗菌疗效,这归因于增强的细菌膜破坏.
- D-CA6-CE/Ag+显著降低了血液溶解和细胞毒性,这可能是由于其状结构最大限度地减少了直接细胞接触.
结论:
- 面部两性D-CA6-CE/Ag+复合体呈现出增强的抗菌性能和降低的生物毒性.
- 这种新的银复合物有望成为对细菌感染的潜在治疗剂.
相关概念视频
02:36Crown Ethers
5.1K
Crown ethers are cyclic polyethers that contain multiple oxygen atoms, usually arranged in a regular pattern. The first crown ether was synthesized by Charles Pederson while working at DuPont in 1967. For this work, Pedersen was co-awarded the 1987 Nobel Prize in Chemistry. Crown ethers are named using the formula x-crown-y, where x is the total number of atoms in the ring and y is the number of ether oxygen atoms. The term 'crown' refers to the crown-like shape that these ether...
5.1K
03:45Formation of Complex Ions
23.2K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
23.2K
01:22EDTA: Chemistry and Properties
1.7K
Polydentate ligands are most widely used in complexometric titrations because they form more stable complexes with the metal ions than mono- or bidentate ligands due to the chelate effect. Examples of polydentate ligands are ethylenediaminetetraacetic acid (EDTA), crown ethers, and cryptands. The most important feature of optimal polydentate ligands is the ability to form 1:1 complexes in a single-step process. Amino carboxylic acid derivatives are frequently used as complexing agents. EDTA is...
1.7K
02:42Ionic Crystal Structures
14.0K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
14.0K
01:19Complexation Equilibria: The Chelate Effect
418
In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
418
01:26EDTA: Auxiliary Complexing Reagents
526
EDTA titrations are usually carried out in highly basic conditions, where the fully deprotonated form of EDTA, Y4−, actively complexes with the free metal ions in the solution. Several metal ions precipitate as hydrous oxide (hydroxides, oxides, or oxyhydroxides) under these conditions, lowering the concentration of free metal ions in the solution. For this reason, auxiliary complexing agents or ligands such as ammonia, tartrate, citrate, or triethanolamine are used in EDTA titrations to...
526