Differential release of endotoxin from Pseudomonas aeruginosa treated with beta-lactam antibiotics and its effect on the lethal activity.

K. Narita, N. Koide, A. Morikawa, Y. Kato, T. Sugiyama, T. Yoshida, T. Yokochi
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引用次数: 2

Abstract

The relationship between the level of endotoxin released from Pseudomonas aeruginosa by exposure to beta-lactam antibiotics and the lethal activity against D-galactosamine (D-GalN)-sensitized mice was examined. In vitro treatment of P. aeruginosa with imipenem (IPM) exclusively caused low-level release of free endotoxin, which was not lethal for D-GalN-sensitized mice. Treatment with other beta-lactam antibiotics, such as ceftazidime (CAZ), meropenem (MEPM) and cefozopran (CZOP) caused high-level release of free endotoxin and it exhibited the lethal action against D-GalN-sensitized mice. This study demonstrated close association of free endotoxin released by antibiotic treatment with the lethal activity.
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内酰胺类抗生素处理铜绿假单胞菌内毒素的差异释放及其对致死活性的影响。
研究了铜绿假单胞菌暴露于β -内酰胺类抗生素后释放的内毒素水平与对d -半乳糖胺致敏小鼠致死活性的关系。在体外用亚胺培南(IPM)单独处理铜绿假单胞菌(P. aeruginosa)可引起游离内毒素的低水平释放,对d - galn致敏小鼠无致死作用。其他β -内酰胺类抗生素如头孢他啶(CAZ)、美罗培南(MEPM)和头孢唑普兰(CZOP)可引起游离内毒素的高水平释放,并对d - galn致敏小鼠表现出致死作用。本研究表明,抗生素治疗释放的游离内毒素与致死活性密切相关。
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