抗微生物药物中的一个灰娘故事:CDPDP非常适合多途径细菌抑制
Syed Shams Ul Hassan1, Naveed Ahmad2, Abdur Rehman3
1Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Pharmacy, Shanghai Jiao Tong University, Shanghai, 200240, China.
European journal of medicinal chemistry
|July 23, 2025
概括
海洋化合物CDPDP显示出强大的抗菌活性,可以对抗金黄色葡萄球菌和Riemerella anatipestifer. 它向S. aureus中的DNA复制,并破坏R. anatipestifer中的膜,提供潜在的宽谱抗生素.
科学领域:
- 微生物学 微生物学
- 药理学 药理学是指药理学的学科.
- 生物化学 生物化学
背景情况:
- 抗生素耐药性是一个日益增长的全球健康威胁.
- 迫切需要新的治疗策略.
- 来自海洋的化合物为新抗生素提供了有希望的来源.
研究的目的:
- 研究海洋衍生化合物CDPDP的抗菌活性和作用机制.
- 为了评估CDPDP对黄金葡萄球菌 (SA) 和Riemerella anatipestifer (RA).
- 阐明受CDPDP影响的分子标和途径.
主要方法:
- 最低抑制度 (MIC) 确定和扫描电子显微镜 (SEM) 活动和形态.
- 对比转录组分析 (RNA-Seq) 以确定基因表达变化.
- 定量逆转录PCR (qRT-PCR),分子对接和分子动力学 (MD) 模拟用于验证和相互作用分析.
主要成果:
- CDPDP显示对SA (IC50 = 300μM) 和RA (IC50 = 100μM) 有强大的杀菌作用.
- 在SEM中,治疗细菌细胞中发现了显著的形态损伤.
- 转录组分析显示,CDPDP在SA中降低了DNA复制/修复基因 (SSB,DnaN,RecF,MutS,PolA,Liga) 的调节,并在RA中破坏了外膜生物发生/蛋白转位基因 (SecY,SecG,TatA,YajC,MurC,AccB).
结论:
- CDPDP表现出一种双重的作用机制:向格兰阳性SA中的DNA,并破坏格兰阴性RA中的膜.
- 确定并验证了与关键蛋白质 (SSB,SecY) 的分子相互作用.
- CDPDP代表了一种潜在的宽频,耐药性弹性抗生素,用于对抗细菌感染.
相关概念视频
Antimicrobial Proteins
5.6K
Antimicrobial proteins are important components of the immune system. They aid the body in combating pathogens by either killing them directly or hindering their replication processes. Four main types of antimicrobial substances are interferons, the complement system, iron-binding proteins, and antimicrobial proteins.
Interferons
Interferons (IFNs) are proteins produced by lymphocytes, macrophages, and fibroblasts infected with viruses. While IFNs cannot prevent viruses from entering and...
Interferons
Interferons (IFNs) are proteins produced by lymphocytes, macrophages, and fibroblasts infected with viruses. While IFNs cannot prevent viruses from entering and...
5.6K
Development of Antibiotic Resistance
216
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...
216
Combined Effects of Drugs: Synergism
4.8K
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...
4.8K
Gene Regulation in Microbial Communities: Quorum Sensing
94
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,...
94
Antimicrobial Effectiveness
166
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...
166
Defense Against Bacterial Pathogens
1.5K
The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
1.5K


