Mannose-binding lectin gene, MBL2, polymorphisms are not associated with susceptibility to invasive pneumococcal disease in children

Lene Fogt Lundbo, Zitta Barrella Harboe, Louise Nygaard Clausen, Mads Vilhelm Hollegaard, Henrik Toft Sørensen, David Michael Hougaard, Helle Bossen Konradsen, Mette Nørgaard, Thomas Benfield

15 Citations (Scopus)

Abstract

Background. Most children are transiently colonized with Streptococcus pneumoniae, but very few develop invasive pneumococcal disease (IPD). Host genetic variation of innate immunity may predispose to IPD. We investigated the effect of genetic variation in the mannose-binding lectin gene, MBL2, on susceptibility and disease severity of IPD in previously healthy children aged <5 years. Methods. IPD cases were identified through national registries. DNA was obtained from the Danish Neonatal Screening Biobank. Pneumococcal serotypes were determined by Quellung reaction. The associations between MBL2 diplotypes and IPD susceptibility, serotypes, and outcome were investigated using logistic regression analysis. Results. We included 372 cases with meningitis, 907 with bacteremia, and 1263 age- and sex-matched controls; 2372 individuals were successfully genotyped and assigned MBL2 diplotypes. The median age in our combined case series was 13 months. Children with defective diplotypes were not at higher risk for meningitis than children with other diplotypes (odds ratio [OR], 0.85; 95% confidence interval [CI], .56-1.28). Similar results were found for bacteremia (OR, 0.89; 95% CI, .68-1.15) as well as for all cases (OR, 0.87; 95% CI, .70-1.09). There was no association with susceptibility to recurrent IPD (n = 12) for children with defective diplotypes compared with cases with a single episode (OR, 0.53; 95% CI, .07-4.13) and with all controls (OR, 0.46; 95% CI, .06-3.56). There was no association between diplotypes and mortality or between diplotypes and pneumococcal serotypes. Conclusions. Defective MBL2 polymorphisms did not predict increased IPD susceptibility in children born in Northern Europe.

Original languageEnglish
JournalClinical infectious diseases : an official publication of the Infectious Diseases Society of America
Volume59
Issue number4
Pages (from-to)e66-e71
Number of pages6
ISSN1058-4838
DOIs
Publication statusPublished - 15 Aug 2014

Keywords

  • Child, Preschool
  • Denmark
  • Disease Susceptibility
  • Female
  • Genetic Predisposition to Disease
  • Humans
  • Infant
  • Infant, Newborn
  • Male
  • Mannose-Binding Lectin
  • Pneumococcal Infections
  • Polymorphism, Genetic
  • Serogroup
  • Streptococcus pneumoniae

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