Time-dependent antimicrobial effect of photodynamic therapy with TONS 504 on Pseudomonas aeruginosa

Time-dependent antimicrobial effect of photodynamic therapy with TONS 504 on Pseudomonas aeruginosa
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TONS 504 光动力疗法对铜绿假单胞菌的时间依赖性抗菌效果

DOI:
10.1007/s10103-018-2490-0
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发表时间:
2018
影响因子:
2.1
通讯作者:
Obana A
Obana A
中科院分区:
工程技术3区
文献类型:
--
作者:
Sueoka K;Chikama T;Latief MA;Ko JA;Kiuchi Y;Sakaguchi T;Obana A

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铜绿假单胞菌(P. aeruginosa)是感染性角膜炎的主要原因,感染性角膜炎本身是全世界失明的主要原因。我们现在已经评估了光动力抗菌化疗(PACT)与二氢卟酚衍生物TONS 504和发光二极管(LED)onP的时间依赖性的有效性。离体培养。将含有TONS 504(10 mg/L)的PACT和通过以660 nm为中心的LED装置提供光的照射(30 J/m2)应用于1 × 106个菌落形成单位的P.空气悬浮液介质。然后将细菌在37 °C下培养不同时间,然后通过测定琼脂平板上的菌落形成来测定活力。还检查了初始LED曝光后3小时的第二次照射的效果。TONS 504在PACT后3 - 9 h显著抑制细菌生长,3 h时效果最明显。此外,在第一次处理后3小时第二次暴露于LED照射增强了对细菌生长的抑制作用。PACT与TONS 504联用抑制了P.在第一次LED治疗后3小时施加额外的照射暴露,大大增加了PACT的有效性。因此,这种抗菌系统值得进一步评价其治疗感染性角膜炎的潜在有效性。
Pseudomonas aeruginosa(P. aeruginosa) is a major cause of infectious keratitis, which itself is a major cause of blindness worldwide. We have now evaluated the time-dependent effectiveness of photodynamic antimicrobial chemotherapy (PACT) with the chlorin derivative TONS 504 and a light-emitting diode (LED) onP. aeruginosain vitro. PACT with TONS 504 (10 mg/L) and irradiation (30 J/m2) by an LED device that delivers light centered on a wavelength of 660 nm was applied to 1 × 106colony-forming units ofP. aeruginosain liquid medium. The bacteria were then cultured at 37 °C for various times before assay of viability by determination of colony formation on agar plates. The effect of a second irradiation at 3 h after the initial LED exposure was also examined. Bacterial growth was markedly inhibited between 3 and 9 h after PACT with TONS 504, with the maximal effect being apparent at 3 h. Furthermore, a second exposure to LED irradiation at 3 h after the first treatment enhanced the inhibitory effect on bacterial growth. PACT with TONS 504 thus inhibited the growth ofP. aeruginosain a time-dependent manner, and an additional irradiation exposure applied 3 h after the first LED treatment greatly increased the effectiveness of PACT. This antibacterial system thus warrants further evaluation with regard to its potential effectiveness for the treatment of infectious keratitis.
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