title: Gene expression changes in Porphyromonas gingivalis W83 after inoculation in rat oral cavity.
abstract: BACKGROUND
  The development of chronic periodontitis was due to not only periodontal pathogens, but also the interaction between periodontal pathogens and host. The aim of this study is to investigate the alterations in gene expression in Porphyromonas gingivalis (P.gingivalis) W83 after inoculation in rat oral cavity.
  
  
  RESULTS
  P.gingivalis W83 inoculation in rat oral cavity caused inflammatory responses in gingival tissues and destroyed host alveolar bone. Microarray analysis revealed that 42 genes were upregulated, and 22 genes were downregulated in the detected 1786 genes in the inoculated P.gingivalis W83. Real-time quantitative PCR detection confirmed the expression alterations in some selected genes. Products of these upregulated and downregulated genes are mainly related to transposon functions, cell transmembrane transportation, protein and nucleic acid metabolism, energy metabolism, cell division and bacterial pathogenicity.
  
  
  CONCLUSIONS
  P.gingivalis W83 has a pathogenic effect on host oral cavity. Meanwhile, inflammatory oral environment alters P.gingivalis W83 gene expression profile. These changes in gene expression may limit the proliferation and weaken the pathogenicity of P.gingivalis W83, and favor themselves to adapt local environment for survival.
authors.affiliation: Department of Periodontology, School of Stomatology, China Medical University, Shenyang , Liaoning, China. cmu.zhaojian@163.com.
authors.forename: Jian
authors.initials: J
authors.lastname: Zhao
authors.affiliation: Department of Periodontology, School of Stomatology, China Medical University, Shenyang , Liaoning, China. phebahoney@163.com.
authors.forename: Qian
authors.initials: Q
authors.lastname: Li
authors.affiliation: Department of Periodontology, School of Stomatology, China Medical University, Shenyang , Liaoning, China. chunlingpan@163.com.
authors.forename: Chun-Ling
authors.initials: CL
authors.lastname: Pan
authors.affiliation: Department of Periodontology, School of Stomatology, China Medical University, Shenyang , Liaoning, China. liujunchao1986@126.com.
authors.forename: Jun-Chao
authors.initials: JC
authors.lastname: Liu
authors.affiliation: Department of Periodontology, School of Stomatology, China Medical University, Shenyang , Liaoning, China. cmuwhy@163.com.
authors.forename: Hong-Yan
authors.initials: HY
authors.lastname: Wang
authors.affiliation: Department of Periodontology, School of Stomatology, China Medical University, Shenyang , Liaoning, China. lisitan040714@163.com.
authors.forename: Li-Si
authors.initials: LS
authors.lastname: Tan
authors.affiliation: Department of Periodontology, School of Stomatology, China Medical University, Shenyang , Liaoning, China. yppan@mail.cmu.edu.cn.
authors.forename: Ya-Ping
authors.initials: YP
authors.lastname: Pan
mesh_terms: D000818:Animals; D001426:Bacterial Proteins / Q000235:genetics*; D016866:Bacteroidaceae Infections / Q000235:genetics / Q000382:microbiology*; D055113:Chronic Periodontitis / Q000235:genetics / Q000382:microbiology*; D020869:Gene Expression Profiling; D015964:Gene Expression Regulation, Bacterial; D054884:Host-Pathogen Interactions; D009055:Mouth / Q000382:microbiology*; D020411:Oligonucleotide Array Sequence Analysis; D016966:Porphyromonas gingivalis / Q000235:genetics*; D051381:Rats; D013047:Specific Pathogen-Free Organisms
chemical_list: D001426:Bacterial Proteins