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Immunity. 2006 Jan;24(1):79-91.

MyD88 mediates neutrophil recruitment initiated by IL-1R but not TLR2 activation in immunity against Staphylococcus aureus.

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1
Division of Dermatology, David Geffen School of Medicine at UCLA, 52-121 CHS, 10833 Le Conte Avenue, Los Angeles, California 90095, USA.

Abstract

MyD88 is an important signaling adaptor for both TLR and IL-1R family members. Here, we evaluated the role of TLR2/MyD88 and IL-1R/MyD88 signaling in host defense against S. aureus by using a cutaneous infection model in conjunction with bioluminescent bacteria. We found that lesions of S. aureus-infected MyD88- and IL-1R-deficient mice were substantially larger with higher bacterial counts compared with wild-type mice. In contrast, TLR2-deficient mice had lesions that were only moderately larger with minimally higher bacterial counts. In addition, MyD88- and IL-1R- but not TLR2-deficient mice had severely decreased recruitment of neutrophils to the site of infection. This neutrophil recruitment was not dependent upon IL-1R/MyD88 signaling by recruited bone marrow-derived cells, suggesting that resident skin cells utilize IL-1R/MyD88 signaling to promote neutrophil recruitment.

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PMID:
16413925
DOI:
10.1016/j.immuni.2005.11.011
[Indexed for MEDLINE]
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