中国组织工程研究 ›› 2014, Vol. 18 ›› Issue (30): 4816-4822.doi: 10.3969/j.issn.2095-4344.2014.30.010

• 生物材料基础实验 basic experiments of biomaterials • 上一篇    下一篇

铍对牙龈卟啉单胞菌菌毛基因型的影响

黄  睿1,李庆艳2,林  华3,郭  巍4,高  宁3   

  1. 1四川大学华西口腔医学院,四川省成都市  610041
    2四川省肿瘤医院口腔科,四川省成都市  610000
    3四川大学华西口腔医学院修复科,四川省成都市  610041
    4北京市瑞尔齿科,北京市  100000
  • 修回日期:2014-04-20 出版日期:2014-07-16 发布日期:2014-08-08
  • 通讯作者: 高宁,博士,教授,四川大学华西口腔医学院修复科,四川省成都市 610041
  • 作者简介:黄睿,女,1986年生,重庆市人,汉族,四川大学华西口腔医学院在读硕士,主要从事口腔修复学方面研究。
  • 基金资助:

    四川省科技厅支持项目(2008SG0023)

Influence of beryllium ions on genotype of Porphyromonas gingivalis fimbriae gene cluster

Huang Rui1, Li Qing-yan2, Lin Hua3, Guo Wei4, Gao Ning3   

  1. 1West China School/Hospital of Stomatology, Sichuan University, Chengdu Province, China
    2Department of Stomatology, Sichuan Cancer Hospital, Chengdu 610000, Sichuan Province, China
    3Department of Prosthodontics, West China School/Hospital of Stomatology, Sichuan University, Chengdu Province, China
  • Revised:2014-04-20 Online:2014-07-16 Published:2014-08-08
  • Contact: Gao Ning, M.D., Professor, Department of Prosthodontics, West China School/Hospital of Stomatology, Sichuan University, Chengdu Province, China
  • About author:Huang Rui, Studying for master’s degree, West China School/Hospital of Stomatology, Sichuan University, Chengdu Province, China
  • Supported by:

    the Grant from Sichuan Science and Technology Bureau, No. 2008SG0023

摘要:

背景:含铍合金口腔修复体在口腔湿润的环境中合金易被腐蚀、溶解而释放出铍离子,铍离子对牙周病主要致病菌——牙龈卟啉单胞菌菌毛基因型是否有影响?
目的:检测铍离子对牙龈卟啉单胞菌菌毛基因型的影响。
方法:将复苏后的牙龈卟啉单胞菌置于含铍离子浓度为10×10-6,5×10-6,1.25×10-6的人工唾液中厌氧培养48 h,采用PCR扩增、测序的方法从分子水平检测铍离子对牙龈卟啉单胞菌菌毛基因型的影响。
结果与结论:在实验条件下培养后的牙龈卟啉单胞菌fimA基因出现突变现象,表现为:当铍离子浓度为5×10-6时,DNA 217、和257位点处出现G/A套峰,与其他组测得的碱基G不同,表明此处有可疑的碱基变化,部分碱基由G转变为A;所有浓度都发现DNA 101位点处插入由7个A碱基组成的碱基(段),目前研究尚未发现突变的发生与铍离子浓度存在直接相关关系。铍离子可影响牙龈卟啉单胞菌fimA基因发生变化,可能引起其阅读框架的移位及编码的蛋白合成异常,进而引起牙龈卟啉单胞菌黏附能力及致病力的改变。


中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程


全文链接:

关键词: 生物材料, 口腔生物材料, 牙周损伤, 铍离子, 牙龈卟啉单胞菌, 菌毛, 黏附能力, 致病力, fimA分型

Abstract:

BACKGROUND: In oral warm and moisture circumstance, alloy which contains Be is easily to be eroded to release Be2+. But there is still no research focusing on beryllium influence on genotype of Porphyromonas gingivalis fimbriae gene cluster.
OBJECTIVE: To investigate Be2+ effect on genotype of Porphyromonas gingivalis fimbriae gene cluster.
METHODS: The revived Porphyromonas gingivalis was resuscitated for 48 hours in the anaerobic culture medium with different concentration of Be2+ (10×10-6, 5×10-6, 1.25×10-6). Through PCR amplification and sequencing, we investigated the effects of Be2+ on genotypes of Porphyromonas gingivalis fimbriae gene cluster.
RESULTS AND CONCLUSION: (1) When Be2+ concentration was 5×10-6, we found the peak of 217 and 257 sites on DNA sequence expressing G/A overlap peak, different from G single peak of the other groups, suggesting the suspicious bases changes, part of the single base G mutated into A. (2) On all concentrations, we found a base group composed of seven A bases was inserted into the 101 site of DNA sequence. Up to now, there is no direct contacts of the mutations occurring to Be2+ concentration. Changes of gene may lead to the shifting of the reading frame, the abnormal synthesis of proteins, the change of Porphyromonas gingivalis fimA gene toxicity, and lastly the unbalance of the micro-ecological environment.


中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程


全文链接:

Key words: beryllium, Porphyromonas gingivalis, fimbriae, bacterial, pathogenicity

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