title: [Invasion of four common periodontal pathogens into vascular endothelial cells in vitro].
abstract: OBJECTIVE
  To investigate the adhesive and invasive ability of four common periodontal pathogens, Pg33277, Pi25611, Aa29522 and Fn10953 in human umbilical vein endothelial cells (HUVEC).
  
  
  METHODS
  The model of infection of HUVEC by periodontal pathogens was established in vitro. The invasive ability of four periodontal pathogens in HUVEC was tested by scanning electron microscope (SEM) and antibiotic protection assays-colony-forming units (CFU).
  
  
  RESULTS
  All of the four periodontal pathogens were found to adhere to HUVEC by SEM and invaded HUVEC at invasion numbers of (0.8 +/- 0.1) x 10(8), (4.1 +/- 0.5) x 10(6), (1.6 +/- 0.3) x 10(6) and (5.0 +/- 0.4) x 10(6) CFU/L respectively by antibiotic protection assays-CFU. The invasion efficiencies were (0.400 +/- 0.050)%, (0.021 +/- 0.003)%, (0.008 +/- 0.002)% and (0.025 +/- 0.002)%, respectively. The invasive ability of Pg33277 was significantly greater than those of the other three periodontal pathogens (P < 0.001). There was no difference in invasive abilities among Pi25611, Aa29522 and Fn10953 (P > 0.05).
  
  
  CONCLUSIONS
  All of the four common periodontal pathogens, Pg33277, Pi25611, Aa29522 and Fn10953 could adhere to and invaded HUVEC, with Pg33277 being the strongest.
authors.affiliation: Department of Periodontology, West China School of Stomatology, Sichuan University, Chengdu 610041, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Deng
authors.forename: Ya-fei
authors.initials: YF
authors.lastname: Wu
authors.forename: Yi
authors.initials: Y
authors.lastname: Ding
authors.forename: Di
authors.initials: D
authors.lastname: Miao
authors.forename: Li
authors.initials: L
authors.lastname: Gao
authors.forename: Shu-juan
authors.initials: SJ
authors.lastname: Guo
mesh_terms: D016976:Aggregatibacter actinomycetemcomitans / Q000472:pathogenicity* / Q000648:ultrastructure; D001422:Bacterial Adhesion; D002478:Cells, Cultured; D016967:Fusobacterium nucleatum / Q000472:pathogenicity* / Q000648:ultrastructure; D061307:Human Umbilical Vein Endothelial Cells / Q000166:cytology / Q000382:microbiology*; D006801:Humans; D008855:Microscopy, Electron, Scanning; D016966:Porphyromonas gingivalis / Q000472:pathogenicity* / Q000648:ultrastructure; D018713:Prevotella intermedia / Q000472:pathogenicity* / Q000648:ultrastructure