检验医学 ›› 2016, Vol. 31 ›› Issue (3): 224-227.DOI: 10.3969/j.issn.1673-8640.2016.03.017

• 基础研究·论著 • 上一篇    下一篇

外膜孔道蛋白38缺失引起鲍曼不动杆菌对β-内酰胺类抗菌药物敏感性降低的实验研究

王代荣1, 李曦2, 祝宏1, 王爱华3   

  1. 1. 浙江省血液中心,浙江 杭州 310052
    2. 浙江大学医学院附属邵逸夫医院感染科,浙江 杭州 310016
    3. 第二军医大学附属东方肝胆外科医院实验诊断科,上海 200438
  • 收稿日期:2015-09-14 出版日期:2016-03-30 发布日期:2016-04-08
  • 作者简介:null

    作者简介:王代荣,女,1986年生,学士,技师,主要从事细菌的耐药机制研究。

    通讯作者:王爱华,联系电话:021-65578027。

Decreased beta-lactam antibiotic susceptibility caused by outer membrane protein 38 deletion in Acinetobacter baumannii

WANG Dairong1, LI Xi2, ZHU Hong1, WANG Aihua3   

  1. 1. Blood Center of Zhejiang Province, Hangzhou 310052,Zhejiang,China
    2. Department of Infectious Diseases,Sir Run Run Shaw Hospital,Zhejiang University School of Medicine,Hangzhou 310016,Zhejiang,China
    3. Department of Laboratory Diagnostics,Eastern Hepatobiliary Surgery Hospital,the Second Military Medical University,Shanghai 200438,China
  • Received:2015-09-14 Online:2016-03-30 Published:2016-04-08

摘要:

目的探讨外膜孔道蛋白38(Omp38)在鲍曼不动杆菌对β-内酰胺类抗菌药物耐药中的作用。方法前期通过体外诱导试验获得1株鲍曼不动杆菌基因Omp38缺失突变株,应用回补试验验证突变基因的作用;采用流式细胞术检测菌株细胞膜电位变化;通过测量菌株的相对生长率评估突变基因的适应性代价。结果Omp38被证实涉及降低鲍曼不动杆菌对β-内酰胺类抗菌药物的敏感性;Omp38降低鲍曼不动杆菌膜电位并具有约3%的适应性代价(P< 0.05)。结论Omp38在鲍曼不动杆菌对β-内酰胺类抗菌药物耐药过程中发挥重要作用;Omp38微弱的适应性代价可能是鲍曼不动杆菌对β-内酰胺类抗菌药物耐药的重要原因。

关键词: 外膜孔道蛋白38, 适应性代价, 膜电位, 鲍曼不动杆菌

Abstract:

Objective To investigate the influence of outer membrane protein 38(Omp38) on the susceptibility of beta-lactam antibiotic in Acinetobacter baumannii. Methods The isolate with Omp38 deletion was induced by in vitro experiment. The contribution of mutation to beta-lactam antibiotic susceptibility was validated by complementation experiment. The cell membrane potential change of isolates was determined by flow cytometry. The growth rates were determined in order to evaluate mutant gene fitness cost. Results The Omp38 was confirmed to be correlated with the decreased beta-lactam antibiotic susceptibility. The Omp38 decreased cell membrane potential,and the fitness cost of Omp38 was approximately 3% through measuring growth rates(P< 0.05). Conclusions Omp38 is deemed to play an important role in beta-lactam antibiotic resistance in Acinetobacter baumannii. The minor fitness cost of Omp38 may be a significant reason for the development of beta-lactam antibiotic resistance in Acinetobacter baumannii.

Key words: Outer membrane protein 38, Fitness cost, Membrane potential, Acinetobacter baumannii

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