范科米辛中间体黄金葡萄球菌中各种抗微生物反应的演变及其治疗影响
bioRxiv : the preprint server for biology
|December 11, 2023
概括
黄金葡萄球菌的抗生素耐药性随着时间的推移而演变. 这项研究表明,万科米辛治疗可能导致耐药性,影响其他抗生素,并表明基于青素的药物可能是MSSA感染的更好的初始选择.
科学领域:
- 微生物学 微生物学
- 进化生物学 进化生物学
- 传染性疾病 传染性疾病
背景情况:
- 黄金葡萄球菌感染是严重的,并且经常用范科米经验性治疗.
- 当前的敏感性测试可能无法预测在感染过程中药物的疗效.
- 抗生素耐药性的发展是一个重大的临床挑战.
研究的目的:
- 调查黄金葡萄球菌在万科米辛治疗期间对抗生素敏感性如何变化.
- 了解驱动抗性的进化机制.
- 通过考虑进化动态来告知治疗策略.
主要方法:
- 在越来越高的万科米辛度下,进化了对甲素敏感的金黄色菌种群 (MSSA).
- 通过测序分析了基因突变.
- 评估对其他抗生素的交叉耐药性 (达普托米辛,美罗, gentamicin,纳夫西林).
- 开发了对药物反应概率的概率模型.
主要成果:
- 观察到影响细胞膜和细胞壁的并行突变.
- 人群对达普托米辛产生交叉耐药性,对其他抗生素产生多种反应.
- 进化轨迹在预测治疗结果方面带来了不确定性.
- 概率概率估计是为了量化药物反应的可变性而得出的.
结论:
- 范科米辛治疗可以诱导耐药性,并改变S. aureus.对其他药物的敏感性.
- 抗菌青素可能是MSSA的首线治疗方法.
- 治疗选择应考虑感染期间细菌进化的概率性质.
相关概念视频
Antibiotic Selection
54.1K
Overview
54.1K
Combined Effects of Drugs: Synergism
3.9K
Synergism is a useful mechanism where combining two or more drugs is more effective than each constituent used alone. Such combinations are also called supra-additive interactions. The drugs collectively enhance the final therapeutic effect by acting on different targets. Another advantage is that the low dose of each constituent drug is sufficient to achieve the desired effect. This helps reduce the duration of therapy and lower the adverse effects of these drugs.
Such synergistic combinations...
Such synergistic combinations...
3.9K
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
Antimicrobial Proteins
1000
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...
1000
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
Mismatch Repair
40.1K
Overview
40.1K


