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Invasion of Human Cells by a Bacterial Pathogen
Published on: March 21, 2011
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冠状细胞入侵可能是持续性葡萄球菌 Aureus 感染的机制在体外
Jerry Chang1, David Kerr, Megan Zheng
1Department of Orthopaedic Surgery, Duke University, Durham, NC, USA.
Clinical orthopaedics and related research
|April 25, 2024
概括
黄金葡萄球菌很容易入侵并在体外持续存在于人体红细胞中,超过了骨质母细胞和纤维母细胞中看到的入侵水平. 这种细胞内持久性可能会导致骨和关节的复发性感染.
科学领域:
- 微生物学 微生物学
- 细胞生物学 细胞生物学
- 传染性疾病 传染性疾病
背景情况:
- 复发性金黄色葡萄球菌的骨和关节感染是常见的.
- 众所周知,S. aureus会入侵骨质母细胞和纤维母细胞,但其与冠状细胞的相互作用不太清楚.
- 阴细胞内细胞内持久性可能会构成治疗挑战.
研究的目的:
- 为了研究黄金葡萄球菌是否可以透和持续细胞内在人体红细胞体内在体外.
- 为了比较S. aureus在骨质细胞中的入侵和持久能力,与骨质细胞和纤维细胞相对抗.
主要方法:
- 人类冠状细胞 (C20A4),骨质母细胞 (MG63) 和小鼠纤维母细胞 (NIH3T3) 在体外培养并感染金黄色菌.
- 用抗生素治疗细胞以消除细胞外细菌.
- 在感染后的不同时间点 (长达6天) 使用殖民地形成单位 (CFU) 量化细胞内金黄色细菌水平.
主要成果:
- 与骨质母细胞和纤维母细胞相比,S. aureus在人体冠状细胞中表现出明显更高的入侵水平.
- 细胞内S. aureus在软质细胞中持续长达6天,其水平高于骨质细胞和纤维细胞中观察到的水平.
- 细胞外抗生素治疗有效消除了S. aureus从细胞介质中,证实了细胞内持久性.
结论:
- 黄金葡萄球菌很容易入侵并在人体体内细胞内持续存在,在体外避开细胞外抗生素.
- 冠状细胞表现出比骨质细胞和纤维细胞更大的S. aureus入侵和细胞内持久性的能力.
- 这种特定于冠状细胞的机制可能在复发的骨和关节感染中发挥作用,因此需要进一步的体内研究.
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