上海交通大学学报（医学版）

上海交通大学学报（医学版）

• 论著（基础研究） • 上一篇    下一篇

噬菌体TM4复苏结核休眠菌的初步研究

甘易玲，郭述良   

  1. 重庆医科大学附属第一医院呼吸与危重症医学科， 重庆 400016
  • 出版日期:2014-01-28 发布日期:2014-01-29
  • 作者简介:甘易玲（1986—）， 女， 住院医师， 硕士生; 电子信箱: ganyilin1501@163.com。
  • 基金资助:

    “十二五”国家科技重大专项(2012ZX10003-009)；国家临床重点专科专项经费资助（卫办医政函【2012】949号）

Preliminary study on resuscitation of Mycobacteriophage TM4 in dormant cells of M.tuberculosis

GAN Yi-ling, GUO Shu-liang   

  1. Department of Respiratory and Critical Care Medicine, the First Affiliated Hospital, Chongqing Medical University, Chongqing 400016, China
  • Online:2014-01-28 Published:2014-01-29
  • Supported by:

    Major Science and Technology Program in the National “12th 5-year Plan” of China，2012ZX10003-009；National Key Clinical Disciplines Foundation of China，2012-949

PDF (PC)

2081

摘要：

目的 探索噬菌体TM4对结核休眠菌复苏的作用。方法 采用密闭培养对数生长期结核菌构建休眠菌模型；采用药敏检测和透射电子显微镜（电镜）观察作为模型检测方法；采用菌落计数和电镜观察作为复苏的检测指标。结果 密闭培养180 d休眠菌模型构建成功；培养3 d复苏促进因子（Rpf）E组管底菌量多于空白组和TM4组，培养8 d噬菌体TM4组管底菌量多于空白组，后续观察见TM4组和Rpf E组管底菌量均较前有所增加。混合液培养第1日时，空白组、TM4组和Rpf E组的菌落计数均为0；培养第6日时，菌落计数分别是0、0.7×102和2×104 CFU/mL；培养第14日时，菌落计数分别是3.4×10、1.68×107和2.1×109 CFU/mL。培养第17日时，电镜观察发现混合物TM4组有大量薄壁结核菌、部分厚壁结核休眠菌和结核菌细胞碎片，Rpf E组满视野薄壁的结核菌，空白组含大量厚壁的结核休眠菌和少数薄壁结核菌。结论 噬菌体TM4能够复苏结核休眠菌。

关键词: 噬菌体TM4, 结核休眠菌, 复苏, 结核病

Abstract:

Objective To investigate the potential of mycobacteriophage TM4 in resuscitating dormant cells of M.tuberculosis. Methods Dormant cells of M.tuberculosis were induced by prolonged closed culture of log-phase M.tuberculosis at 37 ℃, which were proven through drug sensitivity test and electron microscope. M.tuberculosis colony count and electron microscope were used to detect whether the dormant cells of M.tuberculosis had been resuscitated by TM4. Results Dormant cells of M.tuberculosis were obtained successfully by closed culture for 180 d at 37 ℃. The amount of M.tuberculosis at the bottom of the tube in Rpf E group was more than that of the other groups through naked eye after culturing 3 d at 37 ℃. While the amount of M.tuberculosis at the bottom in TM4 group did not increased obviously until culturing for 8 d. M.tuberculosis was still non-culturable in the three groups after culturing 1 d. Along with further culture, part of M.tuberculosis turned culturable, the concentration of resuscitated M.tuberculosis in control, TM4, and Rpf E groups was 0, 0.7×102, and 2×104 CFU/mL, respectively after culturing 6 d. The concentration of resuscitated M.tuberculosis in control, TM4, and Rpf E groups increased to 3.4×10, 1.68×107, and 2.1×109 CFU/mL, respectively after culturing 14 d. Various shapes of M.tuberculosis for culturing 17 d in the three groups were watched through electron microscope. There were lots of thin-wall M.tuberculosis, a few dormant cells of M.tuberculosis with thick wall, and cell pieces in TM4 group; whereas the field of view of Rpf E group was filled with plentiful thin-wall M.tuberculosis; as we excepted, a lot of thick-wall M.tuberculosis and a few thin wall M.tuberculosis were observed in control group. Conclusion Mycobacteriophage TM4 can resuscitate dormant cells of M.tuberculosis.

Key words: bacteriophage TM4, dormant cells of M.tuberculosis, resuscitation, tuberculosis