The C-Type Lectin Receptor Mincle Binds to Streptococcus pneumoniae but Plays a Limited Role in the Anti-Pneumococcal Innate Immune Response

A. Rabes, S. Zimmermann, K. Reppe, R. Lang, P. H. Seeberger, N. Suttorp, M. Witzenrath, B. Lepenies, B. Opitz – 2015

The innate immune system employs C-type lectin receptors (CLRs) to recognize carbohydrate structures on pathogens and self-antigens. The Macrophage-inducible C-type lectin (Mincle) is a FcRγ-coupled CLR that was shown to bind to mycobacterial cord factor as well as certain fungal species. However, since CLR functions during bacterial infections have not yet been investigated thoroughly, we aimed to examine their function in Streptococcus pneumonia infection. Binding studies using a library of recombinantly expressed CLR-Fc fusion proteins indicated a specific, Ca2+-dependent, and serotype-specific binding of Mincle to S. pneumonia. Subsequent experiments with different Mincle-expressing cells as well as Mincle-deficient mice, however, revealed a limited role of this receptor in bacterial phagocytosis, neutrophil-mediated killing, cytokine production, and antibacterial immune response during pneumonia. Collectively, our results indicate that Mincle is able to recognize S. pneumonia but is not required for the anti-pneumococcal innate immune response.

Titel
The C-Type Lectin Receptor Mincle Binds to Streptococcus pneumoniae but Plays a Limited Role in the Anti-Pneumococcal Innate Immune Response
Verfasser
A. Rabes, S. Zimmermann, K. Reppe, R. Lang, P. H. Seeberger, N. Suttorp, M. Witzenrath, B. Lepenies, B. Opitz
Datum
2015
Kennung
10.1371/journal.pone.0117022
Zitierweise
PLoS ONE 2015, 10(2), e0117022
Art
Text
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