作为抗生素辅助剂的宿主防御皮斯基丁,用于对抗Clostridioides difficile
Adenrele Oludiran1, Areej Malik1,2, Andriana C Zourou3
1Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, Virginia, United States of America.
PloS one
|January 22, 2024
概括
抗微生物Piscidins 1和3增强抗生素对Clostridioides difficile感染的有效性. 这些宿主防御可以降低所需的抗生素剂量,减少治疗失败和耐药性风险.
科学领域:
- 微生物学 微生物学
- 传染性疾病 传染性疾病
- 药物发现 药物发现 药物发现
背景情况:
- 困难菌是形成子的肠道病原体,导致反复复发的多药耐药性感染.
- 皮斯基丁1 (p1) 和3 (p3) 是有已知细胞毒性对C. difficile的阴阳性宿主防御.
- 这些具有金属结合基因,影响它们与Cu2+等金属离子的相互作用.
研究的目的:
- 调查Piscidin 1 (p1) 和Piscidin 3 (p3) 作为抗生素辅助剂对抗Clostridioides difficile的一种流行病菌株的疗效.
- 为了确定的apo (无金属) 和holo (金属结合) 状态是否对抗生素强化有不同的影响.
- 阐明这些增强抗生素活性的机制.
主要方法:
- 测试p1和p3的协同作用 (在阿波和全息状态下) 与甲尼达,万科米辛和菲达克索米辛对抗C. difficile.
- 使用显微镜监测C. difficile细胞膜和囊泡模仿的透性.
- 通过剂量降低研究量化抗生素活性增强.
主要成果:
- 无论是p1还是p3,都显著降低了杀死C. difficile所需的美特罗尼达,万科米辛和菲达克索米辛的剂量.
- 甲尼达的DNA向活性被p3增强了32倍,而万科米的细胞壁向活性被膜活性p1-Cu2+增强了64倍.
- 显微镜证实,酸增加了膜透性,促进了更大的抗生素透和生物可用性.
结论:
- 皮西丁作为有效的抗生素辅助剂,增加了针对C. difficile.现有的抗生素的致命性.
- 根据其特定的作用机制优化抗生素联合治疗可以提高治疗结果.
- 抗微生物在打击抗生素耐药性和提高C. difficile感染治疗效率方面表现有前途.
相关概念视频
Antimicrobial Proteins
994
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...
994
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
Defense Mechanism Against Infection
6.5K
Natural flora, body system defenses, and inflammation are natural barriers of the body against infectious agents regardless of previous exposure. Normal floras of the human body refer to the microbial population that colonizes the skin and mucous membranes.
In addition, many body organ systems have unique defenses against infection. The skin is an intact, multilayered surface preventing invasion by microorganisms unless impaired. Mucous membranes lining the mouth, nose, and eyelids are barriers...
In addition, many body organ systems have unique defenses against infection. The skin is an intact, multilayered surface preventing invasion by microorganisms unless impaired. Mucous membranes lining the mouth, nose, and eyelids are barriers...
6.5K
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


