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Published on: July 26, 2017
CD44 suppresses TLR-mediated inflammation
Hidetada Kawana1, Hirokazu Karaki, Morihiro Higashi
1Department of Molecular and Tumor Pathology, Chiba University Graduate School of Medicine, Inohana, Chuo-ku, Chiba, Japan.
Journal of Immunology (Baltimore, Md. : 1950)
|March 7, 2008
Summary
CD44, a hyaluronan receptor, was found to negatively regulate Toll-like receptor (TLR)-mediated inflammation. This study reveals CD44 directly associates with TLR2, playing a protective role in inflammatory responses.
Area of Science:
- Immunology
- Cell Biology
Background:
- CD44 is a major hyaluronan receptor involved in hyaluronan metabolism and inflammatory diseases.
- Toll-like receptors (TLRs) are key in innate immunity and linked to various inflammatory conditions.
Purpose of the Study:
- To investigate the role of CD44 in regulating TLR-mediated inflammation.
- To determine if CD44 directly interacts with TLRs.
Main Methods:
- In vivo studies of inflammation mediated by TLRs.
- Analysis of CD44 association with TLR2 upon stimulation with zymosan.
- Investigation of the cytoplasmic domain of CD44 in TLR signaling.
Main Results:
- CD44 negatively regulates TLR-induced inflammation via NF-kappaB signaling and pro-inflammatory cytokine production.
- CD44 directly associates with TLR2 when stimulated by zymosan.
- The cytoplasmic domain of CD44 is essential for its regulatory function in TLR signaling.
Conclusions:
- CD44 plays a protective role in TLR-mediated inflammation.
- This study is the first to demonstrate a direct association between CD44 and a TLR.
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