抗微生物蓝光降低了人类伤口病原体对生物膜中的四环素类抗生素的抵抗力
Laisa Bonafim Negri1,2,3,4, Sandeep Korupolu1,3, William Farinelli1,3
1Wellman Center for Photomedicine, Massachusetts General Hospital (MGH), Boston, MA 02114, USA.
Cells
|February 12, 2025
概括
与四环素 (TCs) 结合的抗微生物蓝光 (aBL) 有效治疗生物膜感染. 这种组合增强了杀死细菌的效果,并提供了针对抗菌素耐药性 (AMR) 的新策略.
科学领域:
- 微生物学 微生物学
- 抗微生物耐药性 抗微生物耐药性
- 光动力学疗法 光动力学疗法
背景情况:
- 生物膜是慢性感染的主要原因,并驱动抗菌素耐药性 (AMR).
- 目前的治疗方法通常依赖于全身抗生素,这有助于AMR.
- 抗微生物蓝光 (aBL) 产生反应性氧物种 (ROS) 来杀死细菌.
研究的目的:
- 研究四环素 (TCs) 和aBL在体外对细菌生物膜的协同作用.
- 评估这种组合治疗对抗AMR和减少对抗生素依赖的潜力.
主要方法:
- 环素 (米诺环素,多西环素,奥马环素,环素) 单独和与aBL结合进行了测试.
- 使用了耐甲基黄金葡萄球菌 (MRSA),Pseudomonas aeruginosa (PA) 和大肠杆菌 (E. coli) 的生物膜.
- 在不同的aBL参数和光照条件下评估了杀菌活性和ROS产量.
主要成果:
- 单独使用的四环环素对被测试的生物膜的有效性很小.
- 与单独治疗相比,将TC与aBL结合起来显著增强了杀菌活性.
- aBL和TC的应用顺序没有影响整体杀菌结果,这表明TC不是主要的光敏剂.
结论:
- 抗微生物蓝光 (aBL) 增强了四环素对细菌生物膜的抗微生物作用.
- 这种组合疗法为治疗生物膜相关感染和解决AMR提供了一个有希望的策略.
- 需要进一步的研究来探索aBL-TC组合疗法的临床适用性.
更多相关视频
09:29In Vivo Investigation of Antimicrobial Blue Light Therapy for Multidrug-resistant Acinetobacter baumannii Burn Infections Using Bioluminescence Imaging
Published on: April 28, 2017
9.2K
11:06Daily Phototherapy with Red Light to Regulate Candida albicans Biofilm Growth
Published on: April 23, 2019
7.7K
相关概念视频
01:29Biofilms
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...
01:28Biological Methods for Microbial Control
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...
01:28Antimicrobial Effectiveness
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...
01:28Gene Regulation in Microbial Communities: Quorum Sensing
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,...
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...