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PMID:10607756
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Citation |
Takeuchi, O, Takeda, K, Hoshino, K, Adachi, O, Ogawa, T and Akira, S (2000) Cellular responses to bacterial cell wall components are mediated through MyD88-dependent signaling cascades. Int. Immunol. 12:113-7 |
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Abstract |
MyD88 is an adaptor molecule essential for signaling via the Toll-like receptor (TLR)/IL-1 receptor family. TLR4 is a member of the TLR family and a point mutation in the Tlr4 gene causes hyporesponsiveness to lipopolysaccharide (LPS) in C3H/HeJ mice. We have previously shown that both TLR4- and MyD88-deficient mice are hyporesponsive to LPS. In this study we examined the responsiveness of these two knockout mice to various bacterial cell wall components. Cells from TLR4-deficient mice responded to several kinds of LPS, peptidoglycan and crude cell wall preparation from Gram-positive bacteria and mycobacterial lysates. In contrast, macrophages and splenocytes from MyD88-deficient mice did not respond to any of the bacterial components we tested. These results show that MyD88 is essential for the cellular response to bacterial cell wall components. |
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Keywords |
Adaptor Proteins, Signal Transducing; Animals; Antigens, Differentiation/genetics; Antigens, Differentiation/metabolism; Cell Wall/immunology; Drosophila Proteins; Gram-Negative Bacteria/immunology; Gram-Positive Bacteria/immunology; Lipopolysaccharides/immunology; Membrane Glycoproteins/genetics; Membrane Glycoproteins/metabolism; Mice; Mice, Inbred C3H; Mice, Knockout; Mycobacterium/immunology; Myeloid Differentiation Factor 88; Peptidoglycan/immunology; Receptors, Cell Surface/genetics; Receptors, Cell Surface/metabolism; Receptors, Immunologic; Signal Transduction; Toll-Like Receptor 4; Toll-Like Receptors |
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