开发一种释放氧化的素基混合化合物,以增强抗微生物疗效和破坏生物膜
Sumit Kumar1, Myddelton C Parker1, Yi Wu1
1School of Chemical, Materials, and Biomedical Engineering, College of Engineering, University of Georgia Athens GA 30602 USA ejbrisbois@uga.edu.
RSC medicinal chemistry
|September 17, 2025
概括
一种新型的混合抗生素SNAP_CEX,将氧化 (NO) 释放与素 (CEX) 结合起来,有效地对抗抗生素耐药细菌,并破坏医疗器械上的生物膜.
科学领域:
- 生物医学工程 生物医学工程
- 传染性疾病 传染性疾病
- 材料科学 材料科学 材料科学
背景情况:
- 传统的抗生素如塞法列辛 (CEX) 对抗生素耐药性和医疗器械上的生物膜形成越来越无效.
- 格拉姆阴性病原体和生物膜对现有治疗方法构成重大挑战.
研究的目的:
- 通过将NO捐赠体S-nitroso-N-acetylpenicillamine (SNAP) 附在CEX上,开发一种释放氧化 (NO) 的混合合物SNAP_CEX.
- 评估SNAP_CEX对抗生素耐药细菌和生物膜的疗效.
主要方法:
- 将SNAP对CEX进行共价附着,以创建SNAP_CEX联.
- 对NO的释放概况和30天内的稳定性进行评估.
- 评估抗菌活性 (MIC50) 对黄金葡萄球菌和空气菌的抗菌活性.
- 生物膜破坏的量化 (减少生物质和杀死可活细胞).
主要成果:
- SNAP_CEX在30天内表现出持续的NO释放,表明稳定性得到改善.
- 混合物保持了对S. aureus的强烈活性,并显著提高了对P. aeruginosa的有效性.
- 在S. aureus和P. aeruginosa感染中,SNAP_CEX显著破坏了已建立的生物膜,减少了生物质和可活细胞.
- 结合物在治疗度时显示出细胞兼容性.
结论:
- SNAP_CEX有效地将NO的生物膜破坏性与抗生素作用相结合.
- 这种混合方法提供了一种有希望的策略,用于对抗由耐药病原体引起的生物膜相关感染.
- SNAP_CEX代表了治疗具有挑战性的医疗器械相关感染的潜在进展.
相关概念视频
01:27Combined Effects of Drugs: Synergism
6.8K
Synergism is a useful mechanism where combining two or more drugs is more effective than each constituent used alone. Such combinations are also called supra-additive interactions. The drugs collectively enhance the final therapeutic effect by acting on different targets. Another advantage is that the low dose of each constituent drug is sufficient to achieve the desired effect. This helps reduce the duration of therapy and lower the adverse effects of these drugs.
Such synergistic combinations...
Such synergistic combinations...
6.8K
00:57Antibiotic Selection
59.4K
Overview
59.4K
01:28Gene Regulation in Microbial Communities: Quorum Sensing
533
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,...
533
01:28Antimicrobial Effectiveness
908
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...
908
01:30Development of Antibiotic Resistance
1.3K
Antibiotic resistance is a major public health concern that arises when bacteria evolve mechanisms to withstand the effects of antibiotic treatments. This resistance can be intrinsic, acquired through genetic mutations, or transferred between bacteria via horizontal gene transfer. The development of antibiotic resistance poses significant challenges in treating bacterial infections and necessitates ongoing research to develop new therapeutic strategies.Intrinsic resistance occurs when bacterial...
1.3K
01:29Biofilms
1.2K
Biofilms are complex communities of microorganisms encased in a self-produced extracellular polysaccharide matrix attached to surfaces. These microbial consortia can include single or multiple species, providing enhanced survival benefits by forming organized, multilayered structures.The formation of biofilms occurs through four key stages: attachment, colonization, development, and dispersal.During attachment, free-swimming planktonic cells adhere to a surface, often facilitated by...
1.2K