河北医科大学学报

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基因组学研究Csu基因簇在生物被膜生成过程中的作用

  

  1. 河北医科大学第二医院呼吸内一科,河北 石家庄 050000
  • 出版日期:2017-08-25 发布日期:2017-08-09
  • 作者简介:李海涛(1983-),男,河北南宫人,河北医科大学第二医院副主任医师,医学硕士,从事呼吸疾病诊治研究。
  • 基金资助:
    河北省医学科学研究重点课题(ZL20140206,20130503)

Genomics studies the role of the Csu cluster in the biofilm formation#br#

  1. The First Department of Respiratory Medicine, the Second Hospital of Hebei Medical University, Shijiazhuang 050000, China
  • Online:2017-08-25 Published:2017-08-09

摘要: [摘要]〓
〖HTH〗目的〖HTSS〗〖KG*2〗探讨基因组学研究Csu基因簇在多药耐药鲍曼不动杆菌生物被膜生成过程中的作用。
〖HTH〗方法〖HTSS〗〖KG*2〗选取我院临床检验科细菌室分离筛选的多重耐药鲍曼不动杆菌菌株,取该菌株致病力最强的快速生长期和生物被膜期,提取2个不同时期的mRNA进行基因组比对研究。将样本的基因序列与公共数据库进行比较,进行功能注释。
〖HTH〗结果〖HTSS〗〖KG*2〗同一菌株在菌体快速生长期和生物被膜期2种状态下基因表达差异有统计学意义(P<0.05)。生物被膜状态的菌体较快速生长期的菌体有106个基因的表达上调,其中CsuA/B/C/D基因簇表达呈显著升高,92个基因出现了表达的下调。
〖HTH〗结论〖HTSS〗〖KG*2〗CsuA/B/C/D基因簇在生物被膜生成和形态维持中发挥着极其重要的作用。细菌生物被膜形成过程中,菌体的初始黏附依赖于CsuA/B/C/D基因的显著表达。CsuA/B/C/D基因簇介导菌毛的生物合成,还介导菌体分泌表面活性物质和细胞外基质,这些是生物被膜形成早期阶段所必需的。

关键词: 鲍氏不动杆菌, 抗药性, 多药, 基因检测

Abstract: [Abstract] Objective〖HTSS〗〓To study the role of Csu cluster in the biofilm formation of the multidrug resistant Acinetobacter baumannii by genomics.
〖HTH〗〖WTHZ〗Methods〖HTSS〗〓The bacteria were selected from the clinical laboratory of our hospital. The rapidly growth period and biofilm stage were obtained. The mRNA of the two different stages were extracted and sequenced. Compared the gene sequence with the public database, we found the differences in gene expression.
〖HTH〗〖WTHZ〗Results〖HTSS〗〓There were significant differences in the expression of genes between the two strains in the rapid growth phase and biofilm stage of the same strain. In the biofilm state, the expression of 106 genes was upregulated in the cells with rapid growth phase, in which the expression of CsuA/B/C/D gene cluster was significantly increased, and the expression of 92 genes was down regulated.
〖HTH〗〖WTHZ〗Conclusion〖HTSS〗〓The Csu cluster played an important role in biofilm formation and maintenance. In the formation of biofilm, the initial adhesion of the cells required significant expression of the Csu A/B/C/D. The Csu cluster mediated the biosynthesis of pili and the secretion of extracellular matrix, which were necessary for the early stages of the biofilm formation.

Key words: Acinetobacter baumannii, drug resistance, multiple, genetic testing