title: [Evaluation of Bordetella pertussis strains toxicity in vitro using CHO cell lines].
abstract: BACKGROUND
  Whooping cough is still a significant disease with regular outbreaks despite the decades of mass vaccination and good immunization coverage. The aim of this study was to evaluate the capacity of Bordetella pertussis toxicity testing among strains harbouring different alleles of the pertussis toxin promoter ptxP using hamster ovary cell line CHO (Hamster Ovary).
  
  
  METHODS
  The study assessed the limits of detection of high and low Ptx levels producing strains using a reference preparation ofpertussis toxin and B. pertussis strains that increased toxicity in vitro has been previously correlated with ptxP3 allele presence.
  
  
  RESULTS
  The presence of the strong agglomerates on CHO cell line confirmed the higher toxicity of B. pertussis strains isolated in France. Preliminary toxicity study with use of selected strains of B. pertussis differing by ptxP1 and ptxP3 promdter alleles with respect to relevant reference preparation indicate lower toxicity of strains B. pertussis isolated in Poland.
  
  
  CONCLUSIONS
  The toxicity measured on CHO line will be used to assess the virulence of all available B. pertussis strains isolated in Poland.
authors: Monika
authors: M
authors: Zawadka
authors: Daniel
authors: D
authors: Rabczenko
authors: Anna
authors: A
authors: Lutyńska
mesh_terms: D000818:Animals; D001886:Bordetella pertussis / Q000145:classification* / Q000472:pathogenicity*; D016466:CHO Cells; D006224:Cricetinae; D003412:Cricetulus; D037342:Pertussis Toxin / Q000235:genetics / Q000302:isolation & purification*; D011401:Promoter Regions, Genetic; D013045:Species Specificity; D014774:Virulence / Q000235:genetics; D010566:Virulence Factors, Bordetella / Q000235:genetics / Q000302:isolation & purification*
chemical_list: D010566:Virulence Factors, Bordetella; D037342:Pertussis Toxin