Blue Light Compromises Bacterial β-Lactamases Activity to Overcome β-Lactam Resistance

IF 2.2 3区医学 Q2 DERMATOLOGY Lasers in Surgery and Medicine Pub Date : 2024-07-22 DOI:10.1002/lsm.23819

Carolina dos Anjos, Yin Wang, Que Chi Truong-Bolduc, Paul K. Bolduc, Matthew Liu, David C. Hooper, R. Rox Anderson, Tianhong Dai, Leon G. Leanse

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Abstract

Objective

In this study, we evaluated the effectiveness of antimicrobial blue light (aBL; 410 nm wavelength) against β-lactamase-carrying bacteria and the effect of aBL on the activity of β-lactamases.

Methods

Pseudomonas aeruginosa, Escherichia coli, and Klebsiella pneumoniae strains carrying β-lactamases as well as a purified β-lactamase enzymes were studied. β-lactamase activity was assessed using a chromogenic cephalosporin hydrolysis assay. Additionally, we evaluated the role of porphyrins in the photoreaction, as well as protein degradation by sodium dodecyl-sulfate polyacrylamide gel electrophoresis (SDS-PAGE). Finally, we investigated the bactericidal effect of combined aBL-ceftazidime exposure against a metallo-β-lactamase expressing P. aeruginosa strain.

Results

Our study demonstrated that aBL effectively killed β-lactamase-producing bacteria and reduced β-lactamase activity. After an aBL exposure of 1.52 J/cm², a 50% reduction in enzymatic activity was observed in P. aeruginosa. Additionally, we found a 40% decrease in the photoreaction activity of porphyrins following an aBL exposure of 64.8 J/cm². We also revealed that aBL reduced β-lactamase activity via protein degradation (after 136.4 J/cm²). Additionally, aBL markedly improved the bactericidal effect of ceftazidime (by >4-log₁₀) in the metallo-β-lactamase P. aeruginosa strain.

Conclusion

Our results provide evidence that aBL compromises bacterial β-lactamase activity, offering a potential approach to overcome β-lactam resistance in bacteria.

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蓝光削弱细菌 β-内酰胺酶的活性以克服 β-内酰胺抗药性

研究目的在这项研究中，我们评估了抗菌蓝光（aBL；波长 410 nm）对携带 β-内酰胺酶细菌的有效性以及 aBL 对 β-内酰胺酶活性的影响：研究了携带β-内酰胺酶的铜绿假单胞菌、大肠埃希菌和肺炎克雷伯菌株以及纯化的β-内酰胺酶。此外，我们还评估了卟啉在光反应中的作用，以及十二烷基硫酸钠聚丙烯酰胺凝胶电泳（SDS-PAGE）对蛋白质降解的影响。最后，我们研究了 aBL 与头孢唑肟联合暴露对表达金属-β-内酰胺酶的铜绿假单胞菌菌株的杀菌效果：结果：我们的研究表明，aBL 能有效杀死产β-内酰胺酶的细菌，并降低β-内酰胺酶的活性。在暴露于 1.52 J/cm2 的 aBL 后，铜绿假单胞菌的酶活性降低了 50%。此外，我们还发现，在暴露于 64.8 J/cm2 的 aBL 后，卟啉的光反应活性降低了 40%。我们还发现，aBL 通过蛋白质降解降低了 β-内酰胺酶的活性（136.4 J/cm2 后）。此外，aBL 还显著改善了头孢唑肟对金属-β-内酰胺酶铜绿葡萄球菌菌株的杀菌效果（>4-log10）：我们的研究结果提供了 aBL 可抑制细菌 β-内酰胺酶活性的证据，为克服细菌对 β-内酰胺的耐药性提供了一种潜在的方法。

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来源期刊

Lasers in Surgery and Medicine 医学-外科

CiteScore

5.40

自引率

12.50%

发文量

119

审稿时长

1 months

期刊介绍： Lasers in Surgery and Medicine publishes the highest quality research and clinical manuscripts in areas relating to the use of lasers in medicine and biology. The journal publishes basic and clinical studies on the therapeutic and diagnostic use of lasers in all the surgical and medical specialties. Contributions regarding clinical trials, new therapeutic techniques or instrumentation, laser biophysics and bioengineering, photobiology and photochemistry, outcomes research, cost-effectiveness, and other aspects of biomedicine are welcome. Using a process of rigorous yet rapid review of submitted manuscripts, findings of high scientific and medical interest are published with a minimum delay.