吉林大学学报(医学版) ›› 2017, Vol. 43 ›› Issue (04): 747-751.doi: 10.13481/j.1671-587x.20170417

• 基础研究 • 上一篇    下一篇

氟环境下变形链球菌耐氟菌株ciaH、eno和pykF基因的差异表达及其意义

张琦, 赵洪岩, 张志民, 张红, 李文月, 超博, 杨瑶瑶   

  1. 吉林大学口腔医院牙体牙髓病科, 吉林 长春 130021
  • 收稿日期:2016-12-27 出版日期:2017-07-28 发布日期:2017-08-01
  • 通讯作者: 张志民,教授,博士研究生导师(Tel:0431-85579500,E-mail:zhangzm1964@sina.com) E-mail:zhangzm1964@sina.com
  • 作者简介:张琦(1991-),女,河南省安阳市人,在读医学硕士,主要从事变形链球菌致龋作用方面的研究。
  • 基金资助:
    吉林省科技厅自然科学基金资助课题(20160101003JC)

Differential expressions of ciaH,eno and pykF genes of fluoride-resistant Streptococcus mutans cultivated in fluoride environment and its significance

ZHANG Qi, ZHAO Hongyan, ZHANG Zhimin, ZHANG Hong, LI Wenyue, CHAO Bo, YANG Yaoyao   

  1. Department of Operative Dentistry and Endodontics, Stomatology Hospital, Jilin University, Changchun 130021, China
  • Received:2016-12-27 Online:2017-07-28 Published:2017-08-01

摘要: 目的:检测变形链球菌耐氟菌株在氟环境下ciaH、eno和pykF基因表达的差异,探讨ciaH、eno和pykF基因与变形链球菌氟抗性的关系。方法:变形链球菌亲代菌株及其耐氟菌株,分为亲代组(变形链球菌亲代菌株生长于无氟BHI培养基中)、耐氟组(耐氟菌株生长于无氟BHI培养基中)和含氟组(耐氟菌株生长于含氟量为1 g·L-1的BHI培养基中)。分别选取3组处于生长对数期(11h)和稳定期(20 h)的菌株,采用RT-PCR法检测ciaH、eno和pykF mRNA表达水平。结果:与耐氟组比较,含氟组的耐氟菌株ciaH、eno和pykF mRNA表达水平在对数期和稳定期均明显升高(P<0.05或P<0.01);与亲代组比较,耐氟组的耐氟菌株eno和pykF mRNA表达水平在对数期和稳定期均明显降低(P<0.01),ciaH mRNA表达水平在对数期差异无统计学意义(P>0.05),在稳定期明显升高(P<0.01)。结论:氟能提高耐氟菌株ciaH、eno和pykF基因的表达,该组基因与耐氟菌株氟抗性的产生有关联。

关键词: eno, 氟抗性, ciaH, pykF, 变形链球菌, 变形链球菌耐氟菌株

Abstract: Objective: To investigate the relationship between ciaH, eno, pykF genes and fluoride resistance through determining the differential expressions of ciaH, eno and pykF genes of fluoride-resistant Streptococcus mutans cultivated in fluoride environment.Methods: The cultured Streptococcus mutans and their fluoride-resistant strains were divided into UA (Streptococcus mutans subcultured in BHI without NaF), FR (fluoride-resistant Streptococcus mutans subcultured in BHI without NaF) and FFR (fluoride-resistant Streptococcus mutans subcultured in BHI containing 1 g·L-1 NaF) groups. After 11 h (logarithmic phase) and 20 h (platform stage) cultivation, the expression levels of ciaH, eno and pykF mRNA were detected by RT-PCR method.Results: Compared with FR group, the expression levels of ciaH, eno and pykF mRNA in FFR group were increased both in the logarithmic phase and the platform stage(P<0.05 or P<0.01).Compared with UA group, the expression levels of eno and pykF mRNA in FR group were decreased both in the logarithmic phase and the platform stage(P<0.01), whereas the expression level of ciaH mRNA had no significant difference in the logarithmic phase (P>0.05), but it was increased in the platform stage (P<0.01).Conclusion: Fluoride can increase the expression levels of ciaH, eno and pykF genes in fluoride-resistant Streptococcus mutans, indicating that these genes are related to the production of fluoride resistance.

Key words: ciaH, pykF, eno, Streptococcus mutans, fluoride-resistant Streptococcus mutans, fluoride resistance

中图分类号: 

  • R378.12