Antibodies to Bordetella pertussis adenylate cyclase toxin in neonatal and maternal sera.
To investigate the high prevalence among infants of antibodies to Bordetella pertussis adenylate cyclase toxin (ACT), cord-blood sera were examined for antibodies to ACT, filamentous hemagglutinin (FHA) and pertussis toxin (PT) using immunoblot analysis. Antibodies reactive with ACT were the most prevalent in neonatal sera. Similar reactivity of IgG with ACT was found in each sample of a given neonatal-maternal pair, yet IgM reactive with ACT was virtually absent in neonatal sera, suggesting that antibodies to ACT are maternally derived. Antibodies to ACT might come from infection or childhood vaccination of the mothers since pertussis vaccines from all US manufacturers elicited antibodies to ACT in mice. Alternatively, these antibodies may have been elicited by a cross-reactive antigen such as Escherichia coli alpha-hemolysin, since all of the neonatal and maternal sera contained antibodies reactive with alpha-hemolysin.
Center for Biologics Evaluation and Research, US Food and Drug Administration, Bethesda, Maryland 20892.
J L
JL
Arciniega
E L
EL
Hewlett
K M
KM
Edwards
D L
DL
Burns
D037361:Adenylate Cyclase Toxin; D000262:Adenylyl Cyclases / Q000276:immunology*; D000818:Animals; D000907:Antibodies, Bacterial / Q000097:blood*; D001426:Bacterial Proteins / Q000276:immunology; D001886:Bordetella pertussis / Q000201:enzymology / Q000276:immunology* / Q000472:pathogenicity; D015721:Diphtheria-Tetanus-Pertussis Vaccine / Q000276:immunology; D029968:Escherichia coli Proteins; D005260:Female; D005312:Fetal Blood / Q000276:immunology*; D006460:Hemolysin Proteins; D006801:Humans; D007231:Infant, Newborn; D051379:Mice; D008807:Mice, Inbred BALB C; D037342:Pertussis Toxin; D011247:Pregnancy / Q000276:immunology*; D011817:Rabbits; D010566:Virulence Factors, Bordetella / Q000276:immunology*
D037361:Adenylate Cyclase Toxin; D000907:Antibodies, Bacterial; D001426:Bacterial Proteins; D015721:Diphtheria-Tetanus-Pertussis Vaccine; D029968:Escherichia coli Proteins; D006460:Hemolysin Proteins; C036507:Hlya protein, E coli; D010566:Virulence Factors, Bordetella; D037342:Pertussis Toxin; D000262:Adenylyl Cyclases