相关实验视频
Updated: Jun 23, 2025

08:11
Studying Copper Nanoparticle-Induced Programmed Cell Death in Bacteria
Published on: May 16, 2025
99
行动编程的纳米抗生素与pH诱导的崩和负电荷的表面诱导的变形对抗抗生素耐药的细菌腹膜炎
Xiao Zhang1, Penghui Liu2,3, Ran Zhang1
1School of Pharmacy, Shandong Second Medical University, Weifang, Shandong, 261053, P. R. China.
Advanced healthcare materials
|June 26, 2024
概括
新型脂类纳米抗生素通过破坏细菌膜来增强西普罗夫洛克萨对抗药性细菌的疗效. 这种组合疗法在治疗耐药感染方面显著改善,毒性最小.
科学领域:
- 生物技术是生物技术.
- 材料科学 材料科学 材料科学
- 传染性疾病 传染性疾病
背景情况:
- 抗生素耐药性构成全球健康威胁,需要新的治疗策略.
- 抗生素纳米载体提供了增强药物输送和克服抗药机制的潜力.
- 抗生素和辅助剂之间的协同作用对于对抗多药耐药 (MDR) 菌株至关重要.
研究的目的:
- 开发基于脂的纳米抗生素,具有抗生素辅助作用.
- 调查作用机制,包括pH诱导的崩和表面变形,以增强细菌膜破坏.
- 评估这些纳米抗生素与西普罗夫洛克萨结合对抗MDR细菌的疗效.
主要方法:
- 制造脂纳米载体封装西普洛素 (Cip) 具有高药物加载效率 (>80%).
- 对纳米抗生素诱导的细菌膜破坏和药物透的评估.
- 使用分数抑制度指数 (FICI) 和最小抑制度 (MIC) 对MDR * Escherichia coli * 的测定来评估协同效应.
- 在*大肠杆菌*腹膜炎的小鼠模型中进行体内疗效测试.
主要成果:
- 脂类纳米抗生素表明pH诱导的崩和负电荷表面诱导的变形,增强了膜破坏.
- 组合疗法实现了0.375的低FICI,并将Cip的MIC降低了MDR*E. coli*的32倍.
- 在体内研究显示,纳米抗生素组的存活率为87%,仅Cip为25%,对照组为0%.
结论:
- 脂类纳米抗生素作为有效的辅助剂,显著增强西普罗夫洛克萨对MDR菌株的抗菌活性.
- 这些纳米抗生素的模块化设计为开发下一代抗菌疗法提供了一个有前途的战略.
- 开发的纳米抗生素表现出卓越的疗效和安全性,没有观察到主要器官的毒性.
相关概念视频
Antimicrobial Proteins
975
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...
975
Antibiotic Selection
53.0K
Overview
53.0K
Defense Against Bacterial Pathogens
1.4K
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...
1.4K
Acid Suppressive Drugs for Peptic Ulcer Disease: Proton Pump Inhibitors
371
Peptic ulcers, often induced by H. pylori infections or NSAID usage, arise from disruptions in the delicate balance of gastric acid production. Peptic ulcers stem from heightened gastric acid levels due to H. pylori infections or NSAID use. The protective mucus layer diminishes in the presence of these factors, allowing gastric acid to erode the stomach lining and form ulcers.
Gastric acid, a potent cocktail of hydrogen and chloride ions, is produced in specialized parietal cells within the...
Gastric acid, a potent cocktail of hydrogen and chloride ions, is produced in specialized parietal cells within the...
371
Treating Helicobacter pylori in Peptic Ulcers: Antimicrobial Therapy
355
Helicobacter pylori, a resilient gram-negative bacterium, can thrive in the stomach's harsh, acidic environment. Infection with H. pylori leads to a cascade of events within the stomach lining. One of the critical disruptions caused by this bacterium is the interference with somatostatin production, a hormone responsible for regulating acid secretion. This interference tips the balance, escalating acid secretion and diminishing bicarbonate levels. This imbalance compromises the defensive...
355
Surface Membrane Barriers
1.1K
The skin and mucous membranes serve as the primary line of defense against pathogens by providing both physical and chemical protection. These barriers are essential in preventing the entry and establishment of microbes, thereby maintaining the integrity of the host.
The outer layer of the skin, the epidermis, is a robust barrier comprising layers of closely packed keratinized cells. This dense arrangement prevents microbes from penetrating the body. The periodic shedding of epidermal cells...
The outer layer of the skin, the epidermis, is a robust barrier comprising layers of closely packed keratinized cells. This dense arrangement prevents microbes from penetrating the body. The periodic shedding of epidermal cells...
1.1K

