具有高治疗指数的α-螺旋型抗微生物,具有对抗多药耐药细菌的重复子单元结构
Jingying Zhang1, Anqi Chu1, Ping Yang1
1Institute of Pharmaceutics, School of Pharmacy, Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, and Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, Lanzhou, 730000, PR China.
European journal of medicinal chemistry
|August 5, 2025
概括
研究人员设计了新型抗微生物 (AMP) 来对抗抗生素耐药性. 最佳 (27) 在感染模型中显示出对抗性细菌的广泛活性,具有低毒性和有效性.
科学领域:
- 药用化学 医学化学
- 分子生物学分子生物学
- 传染性疾病 传染性疾病
背景情况:
- 传统的抗生素面临着日益增长的耐药性,需要新的治疗策略.
- 抗微生物 (AMP) 提供了一个有希望的替代品,但天然AMP存在局限性.
- 新增产业流程的设计允许合理优化来克服这些局限性.
研究的目的:
- 系统地研究基于α-螺旋和β-片模板的新型AMP的结构-活性关系 (SAR).
- 为了确定有效和安全的AMP候选人治疗耐药细菌感染.
主要方法:
- 使用具有不同氨基酸 (X,Y) 和长度 (n) 的α螺旋 (XXFY) n和β片 (KFKY) n模板生成AMP.
- 对标准和多药耐药细菌菌株的抗微生物活性评估.
- 血溶性毒性,耐药性诱导,杀菌动力学,膜破坏和免疫调节活性的评估.
- 在小鼠模型中进行肺部和皮肤感染的体内疗效测试.
主要成果:
- 最佳, (OOFI) 4 (27),表现出强大的宽谱抗菌活性和低血溶性毒性.
- 27表现出快速杀菌作用,强大的膜破坏和免疫调节性质.
- 27在治疗耐多药性Pseudomonas aeruginosa和耐甲西林金黄色葡萄球菌感染中表现出显著的有效性.
结论:
- 基于模板的AMP de novo设计为SAR提供了有价值的见解.
- 新型27是开发针对临床相关耐药细菌感染的新疗法的有希望的候选者.
相关概念视频
Antimicrobial Proteins
5.3K
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...
5.3K
Development of Antibiotic Resistance
203
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...
203
Multi-pass Transmembrane Proteins and β-barrels
5.5K
In multi-pass transmembrane proteins, the polypeptide chain crosses the membrane more than once. The transmembrane polypeptide chain either forms an α-helix or β-strand structure. α-Helix containing multi-pass transmembrane proteins are ubiquitous, whereas β-strand containing ones are mainly found in gram-negative bacteria, mitochondria, and chloroplasts.
α-Helix containing multi-pass transmembrane proteins
Multi-pass transmembrane proteins such as...
α-Helix containing multi-pass transmembrane proteins
Multi-pass transmembrane proteins such as...
5.5K
Protein Organization
144.3K
Overview
144.3K
Cytoskeletal Proteins in Bacteria
3.5K
Bacterial cells were initially considered simple, randomly organized structures lacking a cytoskeleton. However, the discovery of cytoskeleton homologs in bacteria led to the change of this opinion. Bacterial cytoskeletal filaments regulate the cell shape, cell polarity, cell division, and partitioning of plasmids during cell division. It was later discovered that bacterial cytoskeletal proteins, mainly actin and tubulin homologs, are diverse compared to their eukaryotic counterparts. On the...
3.5K
Protein and Protein Structure
81.4K
Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective. They may serve in transport, storage, or membranes; or they may be toxins or enzymes. Their structures, like their functions, vary greatly. They are all, however, amino acid polymers arranged in a linear sequence.
A protein's shape is critical to its function. For example, an enzyme...
A protein's shape is critical to its function. For example, an enzyme...
81.4K


