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- Title
Small anti-viral compounds activate immune cells via the TLR7 MyD88-dependent signaling pathway.
- Authors
Hemmi, Hiroaki; Kaisho, Tsuneyasu; Takeuchi, Osamu; Sato, Shintaro; Sanjo, Hideki; Hoshino, Katsuaki; Horiuchi, Takao; Tomizawa, Hideyuki; Takeda, Kiyoshi; Akira, Shizuo
- Abstract
The imidazoquinoline compounds imiquimod and R-848 are low-molecular-weight immune response modifiers that can induce the synthesis of interferon-alpha and other cytokines in a variety of cell types. These compounds have potent anti-viral and anti-tumor properties; however, the mechanisms by which they exert their anti-viral activities remain unclear. Here we show that the imidazoquinolines activate immune cells via the Toll-like receptor 7 (TLR7)-MyD88-dependent signaling pathway. In response to the imidazoquinolines, neither MyD88- nor TLR7-deficient mice showed any inflammatory cytokine production by macrophages, proliferation of splenocytes or maturation of dendritic cells. Imidazoquinoline-induced signaling events were also abolished in both MyD88- and TLR7-deficient mice.
- Publication
Nature immunology, 2002, Vol 3, Issue 2, p196
- ISSN
1529-2908
- Publication type
Journal Article
- DOI
10.1038/ni758