人类开始生产一种新型抗生素, 阻碍病原体的殖民
Alexander Zipperer1,2, Martin C Konnerth3, Claudia Laux1,2
1Interfaculty Institute of Microbiology and Infection Medicine, Infection Biology, University of Tübingen, 72076 Tübingen, Germany.
Nature
|July 29, 2016
概括
鼻腔细菌Lugdunensis产生一种新型抗生素,Lugdunin,可以防止病原体黄金菌的殖民. 这一发现凸显了人类微生物群作为抗菌药物的新来源的潜力.
科学领域:
- 微生物学与传染病
- 药物发现和开发
- 人类微生物组研究
背景情况:
- 系统性细菌感染通常源于抗生素耐药的病原体殖民人类表面.
- 金色葡萄球菌的鼻腔携带是侵入性感染的已知危险因素,但殖民机制尚不清楚.
- 与土壤微生物不同的是,人类开始生长的细菌很少产生抗生素.
研究的目的:
- 研究病原体在人体表面的殖民机制,特别是鼻腔运输.
- 识别由人类开始生长的细菌产生的新型抗菌化合物.
- 探索这些化合物和细菌在预防葡萄球菌感染方面的潜力.
主要方法:
- 识别和表征由鼻 Staphylococcus lugdunensis 菌株产生的抗菌化合物.
- 确定新型抗生素lugdunin的化学结构和特性.
- 评估卢格杜宁对主要病原体的杀菌活性及其在动物模型中的有效性.
- 评估S. lugdunensis在人类中的殖民率及其与S. aureus携带的关联.
主要成果:
- 斯塔菲洛科克斯 (Staphylococcus lugdunensis) 生产一种新型循环抗生素.
- 卢格杜宁对主要病原体具有杀菌活性,并且在动物模型中有效,但不容易诱导金黄色细菌的耐药性.
- 人类鼻腔被S. lugdunensis殖民,与S. aureus携带率显著降低有关.
结论:
- 卢格杜宁是一种由人类开始生长的细菌产生的强效抗生素,对关键的病原体有效.
- 像S. lugdunensis这样的Lugdunin产生的开始性细菌在预防葡萄球菌感染方面表现有前途.
- 人类微生物群是新型抗生素发现的有价值,但尚未被充分探索的来源.
相关概念视频
Development of Antibiotic Resistance
1.8K
Antibiotic resistance is a major public health concern that arises when bacteria evolve mechanisms to withstand the effects of antibiotic treatments. This resistance can be intrinsic, acquired through genetic mutations, or transferred between bacteria via horizontal gene transfer. The development of antibiotic resistance poses significant challenges in treating bacterial infections and necessitates ongoing research to develop new therapeutic strategies.Intrinsic resistance occurs when bacterial...
1.8K
Gene Regulation in Microbial Communities: Quorum Sensing
844
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,...
844
Defense Against Bacterial Pathogens
3.3K
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...
3.3K
Microorganisms in Medicine and Therapeutics
1.3K
Microorganisms play a fundamental role in vaccine development, gene therapy, and therapeutic production. Their biological properties are harnessed to advance medicine and public health. Beyond immunization, microorganisms contribute to gut health, antibiotic synthesis, and genetic disease treatment.Live Attenuated and Inactivated VaccinesLive attenuated vaccines, such as the measles, mumps, and rubella (MMR) vaccine, utilize weakened forms of pathogens to closely resemble natural infections.
1.3K
Antibiotic Selection
61.9K
Overview
61.9K
Transduction
2.4K
Among the three main modes of HGT—transformation, conjugation, and transduction—transduction is unique in that it is mediated by bacteriophages, or bacterial viruses.Transduction occurs in two ways. Generalized transduction occurs during the lytic cycle of a bacteriophage infection. In this process, bacteriophages infect bacterial cells, replicate within them, and ultimately cause cell lysis, releasing newly assembled virions. Occasionally, random fragments of the bacterial genome...
2.4K


