A critical cysteine is required for HMGB1 binding to Toll-like receptor 4 and activation of macrophage cytokine release
During infection, vertebrates develop “sickness syndrome,” characterized by fever, anorexia, behavioral withdrawal, acute-phase protein responses, and inflammation. These pathophysiological responses are mediated by cytokines, including TNF and IL-1, released during the innate immune response to inv...
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| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
June 29, 2010
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| In: |
Proceedings of the National Academy of Sciences of the United States of America
Year: 2010, Volume: 107, Issue: 26, Pages: 11942-11947 |
| ISSN: | 1091-6490 |
| DOI: | 10.1073/pnas.1003893107 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1073/pnas.1003893107 Verlag, lizenzpflichtig, Volltext: https://www.pnas.org/doi/full/10.1073/pnas.1003893107 
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| Author Notes: | Huan Yang, Hulda S. Hreggvidsdottir, Karin Palmblad, Haichao Wang, Mahendar Ochani, Jianhua Li, Ben Lu, Sangeeta Chavan, Mauricio Rosas-Ballina, Yousef Al-Abed, Shizuo Akira, Angelika Bierhaus, Helena Erlandsson-Harris, Ulf Andersson, Kevin J. Tracey |
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| 245 | 1 | 2 | |a A critical cysteine is required for HMGB1 binding to Toll-like receptor 4 and activation of macrophage cytokine release |c Huan Yang, Hulda S. Hreggvidsdottir, Karin Palmblad, Haichao Wang, Mahendar Ochani, Jianhua Li, Ben Lu, Sangeeta Chavan, Mauricio Rosas-Ballina, Yousef Al-Abed, Shizuo Akira, Angelika Bierhaus, Helena Erlandsson-Harris, Ulf Andersson, Kevin J. Tracey |
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| 520 | |a During infection, vertebrates develop “sickness syndrome,” characterized by fever, anorexia, behavioral withdrawal, acute-phase protein responses, and inflammation. These pathophysiological responses are mediated by cytokines, including TNF and IL-1, released during the innate immune response to invasion. Even in the absence of infection, qualitatively similar physiological syndromes occur following sterile injury, ischemia reperfusion, crush injury, and autoimmune-mediated tissue damage. Recent advances implicate high-mobility group box 1 (HMGB1), a nuclear protein with inflammatory cytokine activities, in stimulating cytokine release. HMGB1 is passively released during cell injury and necrosis, or actively secreted during immune cell activation, positioning it at the intersection of sterile and infection-associated inflammation. To date, eight candidate receptors have been implicated in mediating the biological responses to HMGB1, but the mechanism of HMGB1-dependent cytokine release is unknown. Here we show that Toll-like receptor 4 (TLR4), a pivotal receptor for activation of innate immunity and cytokine release, is required for HMGB1-dependent activation of macrophage TNF release. Surface plasmon resonance studies indicate that HMGB1 binds specifically to TLR4, and that this binding requires a cysteine in position 106. A wholly synthetic 20-mer peptide containing cysteine 106 from within the cytokine-stimulating B box mediates TLR4-dependent activation of macrophage TNF release. Inhibition of TLR4 binding with neutralizing anti-HMGB1 mAb or by mutating cysteine 106 prevents HMGB1 activation of cytokine release. These results have implications for rationale, design, and development of experimental therapeutics for use in sterile and infectious inflammation. | ||
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| 700 | 1 | |a Wang, Haichao |e VerfasserIn |4 aut | |
| 700 | 1 | |a Ochani, Mahendar |e VerfasserIn |4 aut | |
| 700 | 1 | |a Li, Jianhua |e VerfasserIn |4 aut | |
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