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探索重组III型干扰素在呼吸道感染中的保护作用:来自Mx1缺乏的小鼠模型的见解

A Lozhkov¹, O Dobrovolskaya², E Romanovskaya-Romanko²

¹Russian Ministry of Health, Smorodintsev Research Institute of Influenza, St. Petersburg, Russia; Institute of Biomedical Systems and Biotechnology, Peter the Great Saint-Petersburg Polytechnic University, St. Petersburg, Russia.

International journal of antimicrobial agents

|March 13, 2025

概括

第三类干扰素 (IFN) 提供对流感A病毒 (IAV) 和黄金葡萄球菌 (Staphylococcus aureus) 联合感染的保护,即使在具有遗传缺陷的小鼠中. 这凸显了IFN作为呼吸道病毒感染预防剂的广泛适用性.

科学领域:

免疫学免疫学免疫学
病毒学病毒学
呼吸系统医学呼吸系统医学

背景情况:

第三类干扰素 (IFN) 在预防呼吸道病毒感染方面具有公认的安全性和有效性.
在干扰素刺激基因 (ISG) 遗传变异的个体中研究III型IFN的疗效至关重要.
缺乏Mx1基因的Balb/c小鼠被用作研究这些影响的模型.

研究的目的:

评估III型干扰素 (IFN) 对流感A病毒 (IAV) 感染的保护作用.
在涉及IAV和黄金葡萄球菌的混合感染模型中评估III型IFN的疗效.
为了确定III型IFN是否在具有抗病毒基因背景 (Mx1缺乏) 损害的宿主中有效.

主要方法:

复合型III型干扰素 (IFN-λ) 在与小鼠适应的A型流感病毒 (IAV) 挑战前一天给Mx1缺乏的小鼠注入鼻腔.
一个连续感染模型涉及IAV的鼻内注射,其次是金黄色葡萄球菌,以评估混合感染的结果.
病毒核蛋白水平和肺组织中的细菌负荷在感染后的第三天得到量化.

主要成果:

鼻内IFN-λ给药对IAV感染提供了保护,体现为体重减轻和肺部病毒核蛋白水平降低.
在接受IFN-λ治疗的小鼠中观察到生存率的显著改善.
在混合感染模型中,IFN-λ治疗导致细菌负载减少,减轻体重减轻.

结论:

干扰素-lambda (IFN-λ) 在Mx1缺乏的小鼠中显示出保护作用,这表明即使有遗传变异,它也具有潜在的有效性.
这些发现支持III型IFN作为预防治疗的广泛适用性.
第三种类型的IFN可能对基因背景低于最佳的个体有效,增强它们对呼吸道感染的效用.

关键词:

流感是一个病毒病毒.天生的免疫反应.干扰素-λ 的作用.混合感染混合感染.黄金葡萄球菌黄金葡萄球菌

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