作为强大的抗微生物药物,纳弗他林衍生Bis-QACs的发展:解开结构-活性关系和微生物特性
Nikita A Frolov1, Mary A Seferyan1, Elena V Detusheva2
1N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, 119991 Moscow, Russia.
Molecules (Basel, Switzerland)
|December 17, 2024
概括
新的双四级化合物 (QACs) 显示出强大的抗菌活性对抗耐药细菌. 这些新型消毒剂的毒性低于目前的选择,为感染控制提供了有希望的解决方案.
科学领域:
- 药用化学 医学化学
- 微生物学 微生物学
- 抗菌剂 抗菌剂 抗菌剂
背景情况:
- 抗药性细菌的增加对全球健康构成重大威胁.
- 有效的感染预防和控制策略对于对抗耐药病原体至关重要.
- 四级化合物 (QAC) 被广泛用作消毒剂和消毒剂.
研究的目的:
- 为了研究新型胺衍生的bis-QACs的结构-活性关系 (SAR).
- 评估新的bis-QACs对ESKAPE微生物的抗菌疗效和安全性.
- 为了识别具有强大抗菌和消毒性能的强 bis-QAC.
主要方法:
- 合成和微生物学分析了20个二氧化纳乙烯衍生物bis-QACs.
- 对ESKAPE微生物的浮游生物细胞和生物膜进行测试.
- 试验包括时间杀伤动力学,抵抗形成,细胞形态学 (SEM),细胞毒性和血液毒性.
主要成果:
- 与商业单一QAC相比,Hit bis-QAC化合物显示出更高的细菌静止和杀菌活性.
- 活动受结构对称性和脂友性影响,但链接器形状没有显著影响.
- 化合物5d和6d的细胞毒性和血液毒性比商业QAC低2-3倍.
- SEM成像证实bis-QACs在*S. aureus*和*P. aeruginosa*中诱导显著的膜损伤.
结论:
- 新的bis-QAC显示出作为有效和更安全的消毒剂和消毒剂的巨大潜力.
- 这些化合物为打击细菌耐药性和预防感染提供了有希望的替代品.
- 这些bis-QAC的进一步开发可能会导致更好的感染控制解决方案.
相关概念视频
Gene Regulation in Microbial Communities: Quorum Sensing
1
Quorum sensing is a mechanism of bacterial communication that enables coordinated gene expression in response to changes in population density. This facilitates collective behaviors that enhance survival, resource acquisition, and ecological adaptation. This process relies on small signaling molecules called autoinducers that accumulate as bacterial populations grow. When a critical threshold concentration of autoinducers is reached, bacterial cells collectively modify gene expression,...
1
Aryldiazonium Salts to Azo Dyes: Diazo Coupling
2.9K
The reaction of weakly electrophilic aryldiazonium (also called arenediazonium) salts with highly activated aromatic compounds leads to the formation of products with an —N=N— link, called an azo linkage. This reaction, presented in Figure 1, is known as diazo coupling and occurs without the loss of the nitrogen atoms of the aryldiazonium salt. Highly activated aromatic compounds such as phenols or arylamines favor the diazo coupling reaction. The coupling generally occurs at the...
2.9K
Nucleophilic Aromatic Substitution: Elimination–Addition
4.0K
Simple aryl halides do not react with nucleophiles. However, nucleophilic aromatic substitutions can be forced under certain conditions, such as high temperatures or strong bases. The mechanism of substitution under such conditions involves the highly unstable and reactive benzyne intermediate. Benzyne contains equivalent carbon centers at both ends of the triple bond, each of which is equally susceptible to nucleophilic attack. This 50–50 distribution of products is...
4.0K
Antimicrobial Effectiveness
The effectiveness of antimicrobial agents depends on various factors influencing their ability to eliminate microbial populations. Larger microbial populations require more time for complete eradication, emphasizing the importance of population size analysis when evaluating antimicrobial efficacy.Microbial resistance to antimicrobial agents varies significantly. Highly resilient microorganisms include endospores, gram-negative bacteria, and non-enveloped viruses, while prions are exceptionally...
Nucleophilic Aromatic Substitution of Aryldiazonium Salts: Aromatic SN1
2.1K
Treating arylamines with nitrous acid gives aryldiazonium salts that are effective substrates in nucleophilic aromatic substitution reactions. The diazonio group in these salts can be easily displaced by different nucleophiles, yielding a wide variety of substituted benzenes. The leaving group departs as nitrogen gas, and this easy elimination is the driving force for the substitution reaction.
In the Sandmeyer reaction, for example, the diazonio group is replaced by a chloro, bromo,...
In the Sandmeyer reaction, for example, the diazonio group is replaced by a chloro, bromo,...
2.1K
Chemical Agents for Microbial Control
Chemicals play important roles in controlling microbial growth by targeting microbial structures and functions as sanitizers, antiseptics, disinfectants, and sterilants.Alcohols are commonly used sanitizers, effectively disrupting lipid membranes, which compromises cell integrity. They are also used as antiseptics and disinfectants due to their rapid action and versatility.Phenols and their derivatives phenolics , known for denaturing proteins and disrupting cell membranes, are particularly...


