比洛贝丁通过准威莱布兰德因子结合蛋白和葡萄糖凝固酶来减弱金黄色葡萄球菌的毒性
Chongling Zhang1, Wenyuan Zhang1, Shuyue Zhu1
1Changchun University of Chinese Medicine, Changchun, China.
World journal of microbiology & biotechnology
|October 26, 2023
概括
比洛贝丁是一种天然化合物,通过直接抑制关键因子·维莱布兰德因子结合蛋白和葡萄凝酶,有效地减少黄金葡萄球菌的毒性,改善小鼠的生存率.
科学领域:
- 微生物学 微生物学
- 药理学 药理学是指药理学的学科.
- 自然产品 化学 化学
背景情况:
- 黄金葡萄球菌 (S. aureus) 是人类和动物感染的主要原因,包括医院和社区获得的疾病.
- 诸如·维勒布兰德因子结合蛋白 (vWbp) 和葡萄糖凝固酶 (Coa) 等毒性因子对于金黄色细菌的发病至关重要.
- 需要新的治疗策略来对抗黄金菌感染.
研究的目的:
- 研究自然化合物比洛贝丁 (bilobetin) 减弱金黄色细菌毒性的潜力.
- 阐明比洛贝丁通过哪种机制影响金黄色细菌毒性因子vWbp和Coa的影响.
主要方法:
- 试验室试验评估比洛贝丁对vWbp和Coa.诱导的凝血的作用.
- 西方涂抹和光灭试验以确定比洛贝丁的结合亲和力和机制.
- 分子对接和点突变测试以确定参与比洛贝丁蛋白相互作用的关键残留物.
- 在体内研究使用S. aureus肺炎的小鼠模型.
主要成果:
- 比洛贝丁抑制了vWbp和CoA诱导的凝血,但没有影响细菌的增殖.
- 比洛直接与vWbp和Coa结合,具有很高的亲和力 (KA值分别为1.66 × 104 L/mol和1.04 × 104 L/mol).
- 特定的残留物 (vWbp上的TYR-6,TYR-18,CoA上的ALA-190,ASP-189) 被确定为关键的比洛贝丁结合.
- 比洛贝丁治疗改善了体内肺损伤和炎症,并改善了小鼠的生存率.
- 与万科米辛的联合治疗显示出增强的疗效.
结论:
- 比洛贝丁对黄金色细菌毒性因子vWbp和Coa产生双重抑制作用.
- 比洛贝丁作为直接抑制剂,不影响细菌生长.
- 比洛贝丁证明了其作为抗黄金菌感染的化合物的治疗潜力,特别是在组合治疗中.
更多相关视频
06:36Improved Enzyme Protection Assay to Study Staphylococcus aureus Internalization and Intracellular Efficacy of Antimicrobial Compounds
Published on: September 8, 2021
2.8K
12:27Quantifying the Cytotoxicity of Staphylococcus aureus Against Human Polymorphonuclear Leukocytes
Published on: January 3, 2020
6.3K
相关概念视频
Gene Regulation in Microbial Communities: Quorum Sensing
23
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,...
23
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
1.0K
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...
1.0K
Clot Retraction and Fibrinolysis
6.3K
After a fibrin clot is formed, the next step is clot retraction, a vital process facilitated by platelet contractile proteins, such as actin and myosin. These proteins pull the fibrin strands closer together and condense the clot. This action reduces the size of the clot, creating a smaller, denser structure that effectively seals off the damaged vessel. Clot retraction consolidates the clot and helps with wound healing by bringing the edges of the damaged blood vessel closer together.
6.3K
