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非炎症性97-氨基酸高流动性组盒子1衍生聚破坏并防止各种生物膜

Jaime D Rhodes¹, Aishwarya Devaraj¹, Frank Robledo-Avila¹

¹Center for Microbial Pathogenesis, Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, OH, 43205, USA.

|August 25, 2024

概括

高流动性组盒子1 (HMGB1) 蛋白质片段mB盒子-97通过准细胞外DNA有效地破坏细菌生物膜. 这为治疗生物膜感染提供了新的策略,在肺部模型中减少炎症.

科学领域:

微生物学微生物学
免疫学免疫学免疫学
结构生物学结构生物学

背景情况:

细菌生物膜具有保护性的细胞外基质,对它们的完整性至关重要.
这个矩阵由细胞外DNA (eDNA) 和DNA结合蛋白稳定.
高流动性组盒子1 (HMGB1) 蛋白通过破坏矩阵结构而表现出细胞外抗生物膜活性.

研究的目的:

为了确定负责其抗生物膜活动的HMGB1的特定区域.
设计和测试这个区域的合成版本,以检测生物膜的破坏.
在临床前模型中评估这种工程蛋白质片段的治疗潜力.

主要方法:

设计了一个合成的97-氨基酸片段的HMGB1 (mB盒-97) 单个氨基酸修改.
单独测试MB Box-97活性,并与向DNABII蛋白的单克隆抗体结合测试.
在小鼠肺部感染模型中评估了生物膜破坏和抗炎作用.

主要成果:

设计的MB Box-97片段显示出强大的生物膜破坏和预防能力.
mB Box-97对由ESKAPEE病原体形成的生物膜有效.
在小鼠肺部感染模型中观察到促炎活性显著降低.

结论:

mB Box-97片段保留了HMGB1.1的抗生物膜活性.
用MB Box-97准依赖eDNA的生物膜矩阵是一种有前途的治疗策略.
盒子MB-97可以单独使用或结合治疗,以解决细菌生物膜感染.

关键词:

细菌感染细菌感染伯克霍尔德里亚 (Burkholderia cenocepacia) 是一个大脑空间.这就是HMGB1的特点.人性化的单克隆抗体.炎症炎症是一种炎症.

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