可传播的Staphylococcus pseudintermedius阻碍了中性粒细胞外细胞陷驱动的制,以促进侵入性疾病的传播
Rita Haller1,2, Yiyang Cai1,2,3,4,5,6,7, Nicole de Buhr8,9
1Research Group Pathogenesis of Bacterial Infections; TWINCORE, Centre for Experimental and Clinical Infection Research, a joint venture between the Hannover Medical School and the Helmholtz Centre for Infection Research, Hannover, Germany.
耐甲素的 Staphylococcus pseudintermedius (MRSP) 使用核酶 (NucB) 来逃避像中性粒细胞这样的免疫细胞. 这种机制有助于MRSP在宿主中的生存和感染,包括潜在的动物传播给人类.
科学领域:
- 微生物学 微生物学
- 免疫学 免疫学 免疫学
- 动物传播疾病 动物传播疾病
背景情况:
- 甲素耐药的 Staphylococcus pseudintermedius (MRSP) 是一种新兴的动物性病原体,导致动物和人类的感染.
- 人们对S. pseudintermedius的免疫规避策略仍然不太了解,这阻碍了有效的治疗和预防.
研究的目的:
- 调查MRSP用来克服宿主免疫防御,特别是中性粒细胞反应的毒性机制.
- 阐明特定酶在MRSP病原性和感染期间生存中的作用.
主要方法:
- 利用多技术成像和血液感染的小鼠模型来研究MRSP-宿主相互作用.
- 分析了热稳核酶 (NucB) 在MRSP与中性粒细胞和中性粒细胞细胞外陷 (NETs) 的相互作用中的功能.
- 检查了基因上不同的人类临床分离物,检查核酶活性和对NETosis的抗性.
主要成果:
- MRSP使用热稳定核酶,NucB,以抵消NETs的抗微生物和固定作用.
- NucB促进了细胞灭菌后的中性粒细胞内生存,有助于MRSP的发病和持续性.
- 人类MRSP分离物表现出核酶活性和抗NETosis诱导的杀死性,这表明一种保存的毒性机制.
结论:
- MRSP利用NucB来克服天生的免疫反应,特别是中性恋攻击和NET介导的杀戮.
- 这种免疫规避机制对于MRSP的发病,持续性和潜在的动物传播至关重要.
- 了解这种机制可以让我们了解如何在动物和人类中对抗MRSP感染.
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