假肢关节感染的Staphylococcus epidermidis的致病性:细菌的粘附和内化在骨质母细胞,同胞细胞和内皮细胞中
Anne Lise Maucotel1,2,3, Deborah M Crepin2, Allison Faure2
1Institute for Infectious Agents, Hpital de la Croix-Rousse, Hospices Civils de Lyon, Lyon, France.
Journal of medical microbiology
|January 23, 2025
概括
斯塔菲洛科克斯 (Staphylococcus epidermidis) 经常在假肢关节感染 (PJIs) 中发现. 这项研究发现,S. epidermidis的细胞内化是有限的,这表明它是有限的.
科学领域:
- 微生物学 微生物学
- 整形外科 整形外科 整形外科
- 传染性疾病 传染性疾病
背景情况:
- 假肢关节感染 (PJIs) 常常是由葡萄球菌 (Staphylococcus epidermidis) 引起的.
- 在PJI病变发生过程中S. epidermidis内部化的作用受到争议.
- 与金黄色葡萄球菌不同,S. epidermidis进入宿主细胞的能力尚不清楚.
研究的目的:
- 调查S. epidermidis内部化在PJI病理生理学中的作用.
- 为了确定S. epidermidis分离物是否可以侵入关节感染相关的宿主细胞.
- 为了比较S. epidermidis与S. aureus的内化潜力.
主要方法:
- 利用体外模型研究S. epidermidis PJI分离物的粘附和内化.
- 评估了细菌与骨质母细胞,协同细胞和内皮细胞的相互作用.
- 将S. epidermidis分离物的内部化水平与S. aureus SH1000参考菌株进行比较.
主要成果:
- 单独的S. epidermidis在骨质母细胞,突细胞和内皮细胞中表现出较低的内化率.
- 对S. epidermidis的细菌粘附水平与S. aureus参考菌株相当.
- 内化效率取决于特定的S. epidermidis菌株和细胞类型.
结论:
- S. epidermidis 内部化进入宿主细胞是有限的,并且取决于菌株/细胞类型.
- 这些发现不支持细菌内部化作为S. epidermidis PJIs的主要机制.
- 进一步的研究可能将重点放在S. epidermidis在PJIs中的持续性的替代机制上.
相关概念视频
Adherens Junctions
4.7K
Strong contact points between adjacent cells anchor them to each other, forming tissues. Such anchoring junctions are of two types – adherens junctions and desmosomes. Adherens junctions are abundant in tissues such as epithelium and endothelium, forming a continuous zone of adhesion called the adhesion belt. In other tissues, such as heart muscle, they appear as clusters, linking the cells to produce coordinated heart muscle contraction.
Adherens Junctions are Dynamic
Adherens Junctions are Dynamic
4.7K
Intracellular Signaling Affects Focal Adhesions
2.5K
Integrins act both as extracellular input receivers and as intracellular processing activators. As their name suggests, integrins are entirely integrated into the membrane structure. Their hydrophobic membrane-spanning regions interact with the phospholipid bilayer's hydrophobic region. These membrane receptors provide extracellular attachment sites for effectors like hormones and growth factors. They activate intracellular response cascades when their effectors are bound and active.
Some...
Some...
2.5K
Bacterial Signaling
31.5K
Bacterial signaling can occur within bacteria (intracellular) or between bacteria (intercellular). At times, a group of bacteria behaves like a community. To achieve this, they engage in quorum sensing, the perception of higher cell density that causes changes in gene expression. Quorum sensing involves both extracellular and intracellular signaling. The signaling cascade starts with a molecule called an autoinducer (AI). Individual bacteria produce AIs that move out of the bacterial cell...
31.5K
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


