交替的磁场增强了整个病原体和抗生素空间的抗生物膜活性
Miranda Hairgrove1, Sneha Banerjee2, Madhab Sapkota2
1Medical School, UT Southwestern Medical Center, Dallas, TX, USA.
Scientific reports
|December 18, 2025
概括
高频交替磁场 (AMF) 增强了抗生素对假肢关节感染 (PJI) 的有效性. 与抗生素结合的AMF显著降低了细菌生物膜,为PJI提供了一个有前途的非侵入性辅助疗法.
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:
- 假肢关节感染 (PJI) 是关节置换手术的一个严重并发症.
- 植入物上的生物膜形成使治疗复杂化,并且经常需要切除假肢.
- 目前的疗法难以消除生物膜,导致高发病率和医疗费用.
研究的目的:
- 调查交替磁场 (AMF) 在破坏与PJI相关的细菌生物膜方面的有效性.
- 评估AMF和抗生素对生物膜根除的协同作用.
- 为了确定假肢材料成分和温度对AMF疗效的影响.
主要方法:
- 临床相关的PJI病原体的培养生物膜.
- 暴露于AMF的生物膜与抗生素结合使用 (用linezolid治疗阳性,用ciprofloxacin治疗阴性).
- 量化了细菌的减少,并评估了AMF在不同金属组成和温度上的影响.
主要成果:
- 与抗生素单一治疗相比,AMF显著增强了抗生素介导的生物膜消除.
- 用AMF和各自的抗生素实现了格兰阳性生物膜平均日志减少5.72和格兰阴性生物膜平均日志减少5.11.
- 效率独立于植入物金属成分,在80°C时表现最佳,表明时间和温度的依赖性.
结论:
- AMF对PJI生物膜表现出强大的辅助活性,显著改善了抗生素治疗结果.
- 非侵入性和广泛适用于材料使AMF成为一个有前途的治疗策略.
- 需要进一步的临床研究来优化AMF参数,以改善PJI管理和患者康复.
相关概念视频
Antimicrobial Effectiveness
879
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...
879
Biofilms
1.0K
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...
1.0K
Antimicrobial Proteins
12.9K
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...
12.9K
Biological Methods for Microbial Control
758
Biological agents offer an effective means of controlling microbial growth by leveraging natural processes like predation, competition, and the secretion of antimicrobial substances.Predatory bacteria such as Bdellovibrio species target and kill pathogens like Salmonella and E. coli. They are widely used in poultry farms to control infections. Myxococcus species help combat plant-pathogenic fungi. These naturally occurring predators serve as eco-friendly alternatives to chemical pesticides and...
758
Surface Membrane Barriers
2.5K
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...
2.5K
Physical Methods for Controlling Microbial Growth: Radiation and Filtration
954
Radiation and filtration are essential tools for microbial control, targeting microorganisms through distinct mechanisms. Radiation eliminates microbes by damaging their DNA, either killing them or inhibiting their growth. Based on wavelength, radiation is classified into two types: nonionizing and ionizing radiation.Non-ionizing radiation, such as UV radiation (200–400 nm), is absorbed by DNA, causing defects that effectively disinfect surfaces, air, and water, including safety cabinets.
954


