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通过PspA介导的聚合可以保护Streptococcus pneumoniae免受fomites上的干燥

Jessica R Lane¹, Muralidhar Tata¹, Rahena Yasmin¹

¹Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama, USA.

|November 20, 2023

概括

由PspA和哺乳动物GAPDH驱动的Streptococcus pneumoniae聚合,提高了在表面和鼻分泌物中的生存率. 这种PSPA介导的机制有助于肺炎球菌的殖民和传播.

科学领域:

微生物学和免疫学
细菌病原体的产生
宿主-病原体相互作用

背景情况:

肺炎 estreptococcus (Spn) 是一个重要的人类病原体,导致肺炎和侵入性疾病.
肺炎球菌表面蛋白A (PspA) 是一个已知的毒性因子,参与免疫逃避.
之前的研究已经确定了PSPA在逃避补充成分 (如C-反应蛋白) 和中和抗菌 (如乳糖) 中的作用.

研究的目的:

为了研究哺乳动物 (m) GAPDH在Streptococcus pneumoniae (Spn) 聚合中的粘膜分泌中的作用.
阐明PSPA和乳酸在SPN聚合和生存中的作用.
确定PSPA介导聚合对SPN殖民,干燥生存和传播的影响.

主要方法:

在鼻洗精和体外SPN聚合的分析.
评估Spn在干燥后的存活率.
研究细菌表面Spn蛋白质复合体的形成,包括PSPA,mGAPDH和乳酸铁素.

主要成果:

哺乳动物 (m) GAPDH 在粘膜分泌物中以PspA依赖的方式促进Streptococcus pneumoniae (Spn) 聚合.
发现乳酸可以抵消由PSPA和mGAPDH诱导的聚合效应.
PspA介导的,GAPDH依赖的聚合保护了Spn免受菌和鼻分泌物的干燥,幸存的细菌保留了殖民能力.

结论:

Spn形成了涉及PSPA,mGAPDH和乳酸的表面蛋白质复合体,影响聚合.
通过PspA介导的聚合对于Spn在菌体和粘膜环境中的生存至关重要.
调节PSPA,mGAPDH和乳酸水平可能会影响SPN殖民,生存和传播动态.

关键词:

在PspAA中使用.肺炎链球菌的肺炎链球菌.殖民化殖民化的殖民化干燥干燥干燥干燥干燥传输传输传输传输传输传输

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