Role of leukocyte immunoglobulin G receptors in vaccine-induced immunity to Streptococcus pneumoniae

Eirikur Saeland, Jeanette H.W. Leusen*, Gestur Vidarsson, Wietse Kuis, Elisabeth A.M. Sanders, Ingileif Jonsdottir, Jan G.J. Van De Winkel

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Members of the leukocyte immunoglobulin (Ig) G receptor (FcγR) family play a key role in antibody-mediated phagocytosis and can either enhance antigen presentation or down-modulate immune responses. We studied immune responses to a pneumococcal conjugate (pneumococcal polysaccharide serotype 1 [PPS1]-tetanus toxoid) and antibody-mediated protection in mice deficient for individual FcγRs and complement receptor 3 (CR3). FcR γ chain-deficient (FcR γ chain-/-) mice, which lack expression of both FcγRI and III, had significantly lower anti-PPS1 IgG2b and IgG3 responses than did wild-type mice, whereas FcγRII-deficient (FcγRII-/-) mice had significantly higher IgG2a and IgG3 titers. Wild-type and FcγRII-/- mice were protected against infection with pneumococcal serotype 1, whereas immunized FcR γ chain-/- and FcγRIII-deficient mice were not. Immunized CR3-deficient mice were protected against disease, and complement depletion had little effect on protection. These data indicate that activatory leukocyte FcγR, but not FcγRII (a murine homologue of human FcγRIIb), contributes to IgG-mediated protection against pneumococcal disease.

Original languageEnglish
Pages (from-to)1686-1693
Number of pages8
JournalJournal of Infectious Diseases
Issue number11
Publication statusPublished - 1 Jun 2003

Bibliographical note

Funding Information:
Financial support: University Medical Center Utrecht (Wilhelmina Kinder-zickenhuis–STER grant); Netherlands Organization for Scientific Research (grant 901-07-229 to J.H.W.L.).


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