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用Acinetobacter baumannii adhesin Abp2D接种疫苗可以防止与导管相关的尿路感染

Morgan R Timm¹, Kevin O Tamadonfar¹, Taylor M Nye¹

¹Department of Molecular Microbiology and Center for Women's Infectious Disease Research, Washington University School of Medicine, St. Louis, MO, USA.

Nature communications

|August 9, 2025

概括

一种针对Acinetobacter baumannii的特定粘合素的新疫苗在小鼠模型中显著减少了细菌感染. 对一种粘附素的免疫力,Abp2D,足以提供保护,提供一种节约抗生素的方法来预防导管相关的尿路感染.

科学领域:

微生物学微生物学
免疫学免疫学免疫学
疫苗开发疫苗开发

背景情况:

导管相关的尿路感染 (CAUTIs) 是一个重要的医疗负担.
抗药性多种细菌Acinetobacter baumannii对CAUTIs来说是一个越来越令人担忧的问题.
A. baumannii使用纤维素因子结合粘合素 (Abp1D,Abp2D) 在导管上形成生物膜.

研究的目的:

开发一种针对A. baumannii adhesins.的蛋白质子单元疫苗.
在小鼠模型中评估疫苗在预防CAUTI方面的有效性.
阐明疫苗诱导保护的基础免疫机制.

主要方法:

开发了一种针对Abp1D和Abp2D受体结合域 (RBD) 的亚单元疫苗.
在CAUTI模型中,接种疫苗的雌性小鼠和评估的细菌标位.
研究了B细胞的反应,并进行了被动免疫研究.
测试了免疫血清抑制细菌与纤维素素涂层导管结合的能力.

主要成果:

在CAUTI小鼠模型中,接种疫苗显著降低了细菌标位.
仅仅对Abp2D_RBD的免疫力就会给予保护.
免疫血清的被动转移为原始小鼠提供了保护.
Abp2D_RBD-免疫血清抑制了细菌与纤维素素涂层导管的结合.

结论:

一种针对A. baumannii粘附素的蛋白质子单元疫苗有效预防CAUTI.
Abp2D_RBD是CAUTI疫苗的一个有希望的目标.
这种方法提供了一种抗生素节约策略,可以对抗多药耐药的A. baumannii感染.
这些发现有助于全球打击抗菌素耐药性的努力.

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