通过光热能破坏细菌生物膜,以克服抗生素耐药的表型
Natalie Sebeck1, Xiomara Calderón-Colón1, Adam Simmonds2
1Asymmetric Operations Sector, Applied Biological Sciences, The Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723-6099, United States.
Military medicine
|January 7, 2026
概括
研究人员开发了酸盐涂层的金纳米棒,当暴露在近红外光线下时,产生热量以有效地消除耐抗生素的细菌生物膜,增强对伤口感染的抗生素治疗.
科学领域:
- 生物医学工程 生物医学工程
- 材料科学 材料科学 材料科学
- 传染性疾病 传染性疾病
背景情况:
- 细菌生物膜在医疗保健中构成了重大挑战,经常表现出抗生素耐药性,并使伤口护理复杂化.
- 目前用于生物膜感染的除菌方法受到战斗伤口中复杂组织损伤的限制.
- 使用金纳米材料的局部高温提供了破坏细菌膜的潜在策略.
研究的目的:
- 调查金纳米棒 (Au-NR) 和素修饰的Au-NR (素-Au-NR) 与近红外 (NIR) 照射相结合对破坏Staphylococcus epidermidis生物膜的疗效.
- 为了评估抗生素linezolid在使用这种光热方法时增强的抗生素膜活性.
- 评估该策略在治疗抗生素耐药生物膜感染方面的潜力,特别是在伤口护理方面.
主要方法:
- 葡萄球菌表皮膜生物膜被培养并用Au-NR,奇托-Au-NR或对照进行处理.
- 治疗涉及化与或没有NIR辐射.
- 在治疗后,生物膜暴露于抗生素linezolid,并通过和水晶紫色染色量化细菌恢复.
主要成果:
- 素-Au-NR,特别是与NIR辐射,显著提高了linezolid的抗菌膜疗效.
- 素-Au-NR和NIR照射的组合实现了大约99%的细菌失活,比对照增加了42倍.
- 经NIR辐射的奇托-Au-NR达到的温度 (54°C) 比Au-NR (46°C) 高,这表明与生物膜的结合程度更高.
结论:
- 基托桑修饰的金纳米棒在暴露于NIR时有效地产生局部热量,增强抗生素对细菌生物膜的有效性.
- 这种光热方法显著减少了活力细菌,为对抗抗生素耐药性感染提供了有前途的策略.
- 这些发现表明,有可能开发先进的抗生素膜疗法,特别是用于挑战伤口感染.
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