聚胺激活碳烯压力纳米平台协同扭转生物膜驱动的免疫抑制微环境
Shicheng Huo1,2, Liang Chang3, Yifei Liu1
1Department of Orthopedic Surgery, The Spine Surgical Center, Second Affiliated Hospital of Naval Medical University, Shanghai 200003, China.
ACS nano
|August 13, 2025
概括
一种新的纳米平台 (MPP) 通过降解聚氨酸来对抗植入物相关的感染,产生杀死细菌和增强免疫反应的有毒化合物. 这种方法可以逆转免疫抑制并有效清除生物膜.
科学领域:
- 生物材料科学 生物材料科学
- 传染性疾病 传染性疾病
- 免疫学 免疫学 免疫学
背景情况:
- 植入物相关感染 (IAI) 由于聚胺代谢失调,造成了免疫抑制的微环境.
- 过度的多氨基酸通过抑制脂质过氧化和增强DNA修复来促进病原体的生存,同时也有助于生物膜的形成和免疫逃避.
研究的目的:
- 为IAI开发一个聚胺响应纳米平台 (MPP),整合代谢干预和化学动力学疗法 (CDT).
- 通过向聚胺代谢来解决传统氧化损伤疗法的局限性.
主要方法:
- 开发了MIL-100@PAO@PVP (MPP) 纳米平台的开发.
- 使用血氨基氧化酶 (PAO) 来降解多氨酸,产生烯和过氧化 (H2O2).
- 利用H2O2来增强MIL-100介导的CDT,产生基基 (•OH) 来对细菌造成损害.
主要成果:
- MPP诱导严重的细菌膜脂质过氧化 (LPO) 和DNA损伤通过基激素和碳酸压力从acrolein.
- 在体外和体内,MPP表现出显著的抗菌膜疗效和免疫刺激作用.
- 由MPP诱导的细菌碎片激活了巨细胞和树突细胞,逆转了局部免疫抑制.
结论:
- 聚胺响应纳米平台 (MPP) 提供了一种协同方法,将代谢干预和IAI的CDT结合起来.
- MPP有效地对抗与IAI相关的细菌持久性,生物膜形成和免疫抑制.
- MPP为治疗植入物相关感染提供了一个有前途的治疗策略.
相关概念视频
01:29Biofilms
272
Biofilms are complex communities of microorganisms encased in a self-produced extracellular polysaccharide matrix attached to surfaces. These microbial consortia can include single or multiple species, providing enhanced survival benefits by forming organized, multilayered structures.The formation of biofilms occurs through four key stages: attachment, colonization, development, and dispersal.During attachment, free-swimming planktonic cells adhere to a surface, often facilitated by...
272
01:28Gene Regulation in Microbial Communities: Quorum Sensing
92
Quorum sensing is a mechanism of bacterial communication that enables coordinated gene expression in response to changes in population density. This facilitates collective behaviors that enhance survival, resource acquisition, and ecological adaptation. This process relies on small signaling molecules called autoinducers that accumulate as bacterial populations grow. When a critical threshold concentration of autoinducers is reached, bacterial cells collectively modify gene expression,...
92