title: Systemic immune responses in pregnancy and periodontitis: relationship to pregnancy outcomes in the Obstetrics and Periodontal Therapy (OPT) study.
abstract: BACKGROUND
  Our previous studies reported on the obstetric, periodontal, and microbiologic outcomes of women participating in the Obstetrics and Periodontal Therapy (OPT) Study. This article describes the systemic antibody responses to selected periodontal bacteria in the same patients.
  
  
  METHODS
  Serum samples, obtained from pregnant women at baseline (13 to 16 weeks; 6 days of gestation) and 29 to 32 weeks, were analyzed by enzyme-linked immunosorbent assay for serum immunoglobulin G (IgG) antibody to Aggregatibacter actinomycetemcomitans (previously Actinobacillus actinomycetemcomitans), Campylobacter rectus, Fusobacterium nucleatum, Porphyromonas gingivalis, Prevotella intermedia, Tannerella forsythia (previously T. forsythensis), and Treponema denticola.
  
  
  RESULTS
  At baseline, women who delivered live preterm infants had significantly lower total serum levels of IgG antibody to the panel of periodontal pathogens (P = 0.0018), to P. gingivalis (P = 0.0013), and to F. nucleatum (P = 0.0200) than women who delivered at term. These differences were not significant at 29 to 32 weeks. Changes in IgG levels between baseline and 29 to 32 weeks were not associated with preterm birth when adjusted for treatment group, clinical center, race, or age. In addition, delivery of low birth weight infants was not associated with levels of antibody at baseline or with antibody changes during pregnancy.
  
  
  CONCLUSIONS
  Live preterm birth is associated with decreased levels of IgG antibody to periodontal pathogens in women with periodontitis when assessed during the second trimester. Changes in IgG antibody during pregnancy are not associated with birth outcomes.
authors.affiliation: Center for Oral Health Research and Department of Obstetrics and Gynecology, University of Kentucky, Lexington, KY, USA. jleber2@uky.edu
authors.forename: Jeffrey L
authors.initials: JL
authors.lastname: Ebersole
authors.forename: M John
authors.initials: MJ
authors.lastname: Novak
authors.forename: Bryan S
authors.initials: BS
authors.lastname: Michalowicz
authors.forename: James S
authors.initials: JS
authors.lastname: Hodges
authors.forename: Michelle J
authors.initials: MJ
authors.lastname: Steffen
authors.forename: James E
authors.initials: JE
authors.lastname: Ferguson
authors.forename: Anthony
authors.initials: A
authors.lastname: Diangelis
authors.forename: William
authors.initials: W
authors.lastname: Buchanan
authors.forename: Dennis A
authors.initials: DA
authors.lastname: Mitchell
authors.forename: Panos N
authors.initials: PN
authors.lastname: Papapanou
mesh_terms: D000022:Abortion, Spontaneous / Q000276:immunology; D000293:Adolescent; D000328:Adult; D016976:Aggregatibacter actinomycetemcomitans / Q000276:immunology; D000907:Antibodies, Bacterial / Q000097:blood / Q000276:immunology*; D000942:Antigens, Bacterial / Q000276:immunology; D001439:Bacteroides / Q000276:immunology; D044883:Campylobacter rectus / Q000276:immunology; D005260:Female; D005500:Follow-Up Studies; D016967:Fusobacterium nucleatum / Q000276:immunology; D006801:Humans; D007074:Immunoglobulin G / Q000097:blood; D007230:Infant, Low Birth Weight; D007231:Infant, Newborn; D010518:Periodontitis / Q000097:blood / Q000276:immunology* / Q000382:microbiology; D016966:Porphyromonas gingivalis / Q000276:immunology; D011247:Pregnancy; D011248:Pregnancy Complications / Q000097:blood / Q000276:immunology*; D011256:Pregnancy Outcome; D011262:Pregnancy Trimester, Second; D047928:Premature Birth / Q000276:immunology; D018713:Prevotella intermedia / Q000276:immunology; D050497:Stillbirth; D048373:Treponema denticola / Q000276:immunology; D055815:Young Adult
chemical_list: D000907:Antibodies, Bacterial; D000942:Antigens, Bacterial; D007074:Immunoglobulin G