蓝光破坏了细菌β-乳酸酶的活性,以克服β-乳酸盐的抗性
Carolina Dos Anjos1, Yin Wang2, Que Chi Truong-Bolduc2
1Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA.
Lasers in surgery and medicine
|July 23, 2024
概括
抗微生物蓝光 (aBL) 有效地杀死产生β-乳酸酶的细菌,并降低酶活性. 这种方法有望克服抗生素耐药性,特别是在与ceftazidime等抗生素相结合时.
科学领域:
- 照相医疗 (photomedicine) 是一种医学技术.
- 抗微生物耐药性研究的研究.
- 生物化学 生物化学
背景情况:
- β-乳酸酶酶会对β-乳酸抗生素产生耐药性.
- 抗微生物蓝光 (aBL) 是一种新兴的治疗方式.
- 研究aBL对抗耐药细菌的疗效至关重要.
研究的目的:
- 评估抗微生物蓝光 (aBL) 对产生β-乳酸酶的细菌的有效性.
- 为了确定aBL对β-乳酸酶活性的影响.
- 为了评估aBL与ceftazidime的协同效应.
主要方法:
- 对细菌菌株 (P. aeruginosa,E. coli,K. pneumoniae) 和纯化的β-乳酸酶暴露于aBL (410 nm).
- 使用染色体氨酸解液测定β-乳酸酶活性.
- 氨酸光反应和蛋白质降解的分析 (SDS-PAGE).
- 对aBL-ceftazidime联合治疗与金属β-乳糖酶菌株的评估.
主要成果:
- aBL显著降低了细菌和纯化的酶中的β-乳酸酶活性.
- 在1.52 J/cm2 aBL暴露后,P. aeruginosa的酶活性减少了50%.
- aBL诱导蛋白质降解,导致酶活性降低.
- 结合 aBL 和 ceftazidime 增强了超过 4-log10 的杀菌效应,对抗性 P. aeruginosa.
结论:
- aBL有效地抑制了细菌β-乳酸酶的活性.
- aBL提出了一种潜在的策略来对抗β-乳酸盐耐药性.
- 使用aBL和抗生素的联合治疗可以克服抗菌素耐药性.
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