一种具有向和杀死域的可切割化学可以增强LPS中和抗菌特性,对抗多药耐药的大肠杆菌产生抗菌作用
Zhenlong Wang1,2, Da Teng1,2, Ruoyu Mao1,2
1Team of AMP & Alternatives to Antibiotics, Gene Engineering Laboratory, Institute of Feed Research, Chinese Academy of Agricultural Sciences, Beijing, 100081, People's Republic of China.
Communications biology
|November 17, 2023
概括
一种新型的化学,R7,有效地杀死诸如大肠杆菌之类的致病细菌,并中和脂聚糖 (LPS) 毒性. 这种双重作用的药物在对抗败血症和相关的炎症状况方面表现有前途.
科学领域:
- 微生物学 微生物学
- 免疫学 免疫学 免疫学
- 药物发现 药物发现 药物发现
背景情况:
- 致病性大肠杆菌 (Escherichia coli) 引起腹和败血症,而脂多糖化物 (LPS) 是一个关键的内毒素.
- 现有的治疗方法难以同时消除细菌和中和LPS毒性.
- 开发针对细菌活力和内毒素活性的双重功能药剂至关重要.
研究的目的:
- 设计和评估具有增强抗菌和抗炎活性的嵌合性.
- 调查新型在中和LPS和抗击细菌感染方面的有效性.
- 评估主要候选的体内性能和治疗潜力.
主要方法:
- 通过将LPS向 (LBP14) 和杀死 (L7) 域与各种链接器结合起来,生成嵌合性 (R7,A7,G7).
- 在体外评估对*大肠杆菌*,*S. typhimurium*和*S. aureus*的抗菌活性.
- 评估LPS中和能力和体内疗效,包括存活率和炎症途径抑制.
主要成果:
- 与父域相比,含有可切割链接器的仿真R7的抗菌活性增加了2-4倍.
- R7表现出显著增强的LPS中和能力.
- 在体内研究表明,R7改善了小鼠的生存率,通过抑制NF-κB信号传递减少了肺损伤,并促进了IAP活动.
结论:
- 嵌合体R7具有强大的双抗菌和抗内毒素特性.
- R7在体内释放活域的能力有助于其治疗效果.
- R7代表了开发新型治疗细菌感染和败血症的有希望的候选人.
相关概念视频
01:23Inhibitors of Gram-positive Cell Wall Synthesis
Bacterial cell walls are typically rigid structures composed mainly of peptidoglycan, a mesh-like polymer that provides mechanical strength and maintains cell shape. The synthesis of peptidoglycan is a crucial process in bacterial growth and serves as a primary target for many antibiotics.Mechanism of Action of Beta-Lactam AntibioticsBeta-lactam antibiotics, such as penicillin, inhibit peptidoglycan synthesis in actively growing cells. These antibiotics share a characteristic four-membered...
01:25Clinical Significance of Antibiotic Resistance
Methicillin-resistant Staphylococcus aureus (MRSA) presents a critical public health threat, arising from its capacity to resist β-lactam antibiotics due to acquisition of the mecA gene within the staphylococcal cassette chromosome mec (SCCmec). This gene encodes penicillin-binding protein 2a (PBP2a), which impairs binding efficacy of methicillin and other β-lactams. MRSA has evolved into distinct clonal lineages impacting humans and animals alike, reinforcing its significance within the One...