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Updated: Jul 25, 2025

A Murine Model of Group B Streptococcus Vaginal Colonization

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Published on: November 16, 2016

营养免疫对B组链球菌在伤口感染期间的病变发生的影响

Madeline S Akbari¹, Rebecca A Keogh¹, Jana N Radin²

¹Department of Immunology and Microbiology, University of Colorado School of Medicine, Anschutz Medical Campus , Aurora, Colorado, USA.

|June 26, 2023

概括

糖尿病性伤口感染允许B组链球菌 (GBS) 持续存在,因为宿主免疫系统,特别是calprotectin,效率较低. 这与控制GBS的非糖尿病伤口形成鲜明对比.

科学领域:

微生物学和免疫学
糖尿病并发症糖尿病并发症
伤口感染伤口感染

背景情况:

乙组链球菌 (GBS) 是一种致病生物,对新生儿和成年人造成严重后果.
GBS经常感染糖尿病伤口,但在非糖尿病伤口中很少见,这表明糖尿病宿主因素的作用.
之前的研究表明,在糖尿病伤口感染中,中性粒细胞因子和细菌金属运输基因增加.

研究的目的:

为了研究GBS的发病因子,在一种因流毒素诱导的糖尿病伤口模型中.
评估宿主金属合剂和细菌金属载体在GBS糖尿病伤口感染中的作用.

主要方法:

开发一种因斯特雷普托佐托辛诱导的糖尿病小鼠伤口模型.
在糖尿病和非糖尿病伤口中的金属合剂 (calprotectin,lipocalin-2) 的量化.
在两种伤口类型中使用野生类型和金属载体突变菌株评估GBS存活率.

主要成果:

与非糖尿病伤口相比,糖尿病伤口显示了calprotectin和lipocalin-2的水平增加.
在非糖尿病性伤口中,calprotectin抑制了GBS的存活率,但在糖尿病性伤口中没有.
对于糖尿病伤口感染,GBS金属载体 (Zn,Mn,Ni) 是不可缺少的,但在非糖尿病伤口中有助于持久性.

结论:

通过calprotectin的功能营养免疫有效地减轻非糖尿病伤口中的GBS.
在糖尿病伤口中,calprotectin不足以控制GBS的持续性,这表明宿主免疫力受损.
糖尿病中宿主免疫的改变有助于GBS在糖尿病伤口感染中的成功和持久性.

关键词:

美国ABC运输商 B组的链球菌.糖尿病糖尿病患者糖尿病患者天生的免疫力天生的免疫力.中性粒细胞中性粒细胞.软组织感染感染.

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