实用医学杂志 ›› 2022, Vol. 38 ›› Issue (3): 306-310.doi: 10.3969/j.issn.1006⁃5725.2022.03.009

• 基础研究 • 上一篇    下一篇

亚抑制浓度庆大霉素通过抑制ATP 的产生降低大肠杆菌丛动能力的机制

祝晓娟1 龙永珍2 陈晓玲3 张莹2 彭青2 周树勤1,4   

  1. 1喀什地区第一人民医院麻醉科(新疆喀什 844000);2南方医科大学珠江医院再生医学研究所(广州510280);3广州市红十字会医院儿科(广州 510220);4南方医科大学珠江医院麻醉科(广州 510280)

  • 出版日期:2022-02-10 发布日期:2022-02-10
  • 通讯作者: 周树勤 E⁃mail:zhoushuqin@smu.edu.cn
  • 基金资助:
    国家自然科学基金地区基金(编号:81760664)


ATPGentamicin at a subinhibitory concentration reduces the swarming of Escherichia coli by inhibiting cellularATP production

 ZHU Xiaojuan*,LONG Yongzhen,CHEN Xiaoling,ZHANG Ying,PENG Qing,ZHOU Shuq⁃in.   

  1. Department of Anesthesiology,First People′s Hospital of Kashi,Kashi 844000,China

  • Online:2022-02-10 Published:2022-02-10
  • Contact: ZHOU Shuqin E⁃mail:zhoushuqin@smu.edu.cn

摘要:

目的 前期研究发现,大肠杆菌经亚抑制浓度的庆大霉素预处理后,丛动性可显著降低,本研究将基于前期的工作基础,探讨亚抑制浓度的庆大霉素对大肠杆菌丛动性的抑制作用的相关机制。方法 确认亚抑制浓度庆大霉素预处理对大肠杆菌 ATCC25922 丛动性的抑制作用,Real⁃timePCR 测定庆大霉素对三羧酸循环(TCA)相关基因的表达水平的影响,ATP 检测试剂盒检测庆大霉素对 ATP 产生的影响,并观察在丛动平板中补充 ATP 对庆大霉素预处理大肠杆菌丛动性的逆转作用。结果 1/2 MIC 庆大霉素预处理可显著抑制大肠杆菌 ATCC25922 的丛动能力,Real⁃time PCR 结果提示经庆大霉素处理的大肠杆菌 TCA 相关基因,poxB、aceE、gltA、sdhD、sdhC、sucC、fumA 及 icd 基因表达均下调,细菌 ATP 产生减少,在丛动平板中补充 ATP 可逆转庆大霉素对大肠杆菌丛动性的抑制作用。结论 亚抑制浓度庆大霉素可通过下调 TCA 相关基因,减少细菌 ATP 的产生,抑制大肠杆菌的丛动能力。该结果为进一步揭示庆大霉素的抗生素后效应发生机制提供了新的理论依据。

关键词:

庆大霉素, 大肠杆菌, 丛动, 三羧酸循环, ATP

Abstract:

Objective To investigate the mechanisms through which gentamicin at a subinhibitory concen⁃tration inhibits the swarming of E. coli. Methods To confirm the inhibitory effect of pretreated gentamicin on theswarming of E. coli ATCC25922,real⁃time PCR was used to determine the effect of gentamicin on the expressionof tricarboxylic acid cycle(TCA)related genes,and ATP detection kit was used to detect the effect of gentamicinon cellular ATP production. The effect of ATP on the swarming of gentamicin⁃pretreated E. coli was observed.Results The pretreated gentamicin with 1/2MIC significantly inhibited the swarming of Escherichia coli ATCC25922.By Real⁃time PCR,TCA⁃related genes of E. coli treated with gentamicin were significantly down⁃regulated. Theexpressions of poxB,aceE,gltA,sdhD,sdhC,sucC,fumA and icd genes were down⁃regulated,and the productionof cellular ATP of E. coli ATCC25922 decreased after pretreatment. The inhibition of gentamicin on the swarming ofE. coli could be reversed by adding ATP in the swarming plate. Conclusion Gentamicin inhibits the swarming ofE. coli by downregulating TCA related genes and reducing the production of cellular ATP. Our findings provide anew theoretical basis for revealing the mechanisms of the post⁃antibiotic effect of gentamicin.

Key words:

Gentamicin, Escherichia coli, swarming, TCA, ATP

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