在3D生物膜聚合物中受限的机械微环境调节了抗生素耐药性,通过扫描电化学显微镜探测了3D生物膜聚合物
Yan Zhou1,2, Xuan Zhou1,2, Junjie Zhang1,2
1The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, P. R. China.
Analytical chemistry
|March 3, 2025
概括
来自细胞外基质 (ECM) 的机械线索在3D生物膜中显著影响抗生素耐药性. 了解这些因素对于开发有效的抗生素治疗耐药细菌至关重要.
科学领域:
- 微生物学 微生物学
- 生物物理学的生物物理.
- 生物化学 生化学
背景情况:
- 抗生素耐药性是全球主要的健康威胁.
- 现有的2D生物膜模型不能完全复制体内3D生物膜的机械微环境.
- 这种差异导致了抗生素剂量不准确和治疗失败.
研究的目的:
- 开发一个采用机械线索的3D体外生物膜模型.
- 调查细胞外矩阵 (ECM) 刚性在抗生素耐药性中的作用.
- 探索提高抗生素疗效的新策略.
主要方法:
- 设计了一个基于阿加凝的3D体外生物膜模型.
- 使用扫描电化学显微镜 (SECM) 在现场监测生物膜代谢动态.
- 进行了转录分析和基因淘汰实验.
主要成果:
- 在嵌入硬和软凝中的生物膜聚合物中观察到不同的呼吸模式.
- 发现机械线索通过降低代谢活性和增加细胞外聚合物质 (EPS) 生产来调节抗生素耐受性.
- 甘氨酸被确定为一种潜在的辅助剂,通过增强三碳酸循环来增强抗生素疗效.
结论:
- 在3D生物膜中,ECM硬度在调解抗生素耐药性方面发挥着至关重要的作用.
- 基于SECM的策略对研究生物膜代谢和抗生素耐药性的研究具有多样性.
- 针对EPS生产,例如通过敲除yjbE基因,可以在特定的机械环境中提高抗生素的疗效.
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