PMID- 23508573 OWN - NLM STAT- MEDLINE DCOM- 20131224 LR - 20220410 IS - 1528-3658 (Electronic) IS - 1076-1551 (Print) IS - 1076-1551 (Linking) VI - 19 IP - 1 DP - 2013 May 20 TI - Signaling of high mobility group box 1 (HMGB1) through toll-like receptor 4 in macrophages requires CD14. PG - 88-98 LID - 10.2119/molmed.2012.00306 [doi] AB - High mobility group box 1 (HMGB1) is a DNA-binding protein that possesses cytokinelike, proinflammatory properties when released extracellularly in the C23-C45 disulfide form. HMGB1 also plays a key role as a mediator of acute and chronic inflammation in models of sterile injury. Although HMGB1 interacts with multiple pattern recognition receptors (PRRs), many of its effects in injury models occur through an interaction with toll-like receptor 4 (TLR4). HMGB1 interacts directly with the TLR4/myeloid differentiation protein 2 (MD2) complex, although the nature of this interaction remains unclear. We demonstrate that optimal HMGB1-dependent TLR4 activation in vitro requires the coreceptor CD14. TLR4 and MD2 are recruited into CD14-containing lipid rafts of RAW264.7 macrophages after stimulation with HMGB1, and TLR4 interacts closely with the lipid raft protein GM1. Furthermore, we show that HMGB1 stimulates tumor necrosis factor (TNF)-alpha release in WT but not in TLR4(-/-), CD14(-/-), TIR domain-containing adapter-inducing interferon-beta (TRIF)(-/-) or myeloid differentiation primary response protein 88 (MyD88)(-/-) macrophages. HMGB1 induces the release of monocyte chemotactic protein 1 (MCP-1), interferon gamma-induced protein 10 (IP-10) and macrophage inflammatory protein 1alpha (MIP-1alpha) in a TLR4- and CD14-dependent manner. Thus, efficient recognition of HMGB1 by the TLR4/MD2 complex requires CD14. FAU - Kim, Sodam AU - Kim S AD - Department of Surgery, University of Pittsburgh, Pittsburgh, PA, USA. FAU - Kim, Sun Young AU - Kim SY FAU - Pribis, John P AU - Pribis JP FAU - Lotze, Michael AU - Lotze M FAU - Mollen, Kevin P AU - Mollen KP FAU - Shapiro, Richard AU - Shapiro R FAU - Loughran, Patricia AU - Loughran P FAU - Scott, Melanie J AU - Scott MJ FAU - Billiar, Timothy R AU - Billiar TR LA - eng GR - R01 GM050441/GM/NIGMS NIH HHS/United States GR - UL1 TR000005/TR/NCATS NIH HHS/United States GR - R01GM050441/GM/NIGMS NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural DEP - 20130520 PL - England TA - Mol Med JT - Molecular medicine (Cambridge, Mass.) JID - 9501023 RN - 0 (Adaptor Proteins, Vesicular Transport) RN - 0 (Cytokines) RN - 0 (HMGB1 Protein) RN - 0 (Lipopolysaccharide Receptors) RN - 0 (Ly96 protein, mouse) RN - 0 (Lymphocyte Antigen 96) RN - 0 (Myd88 protein, mouse) RN - 0 (Myeloid Differentiation Factor 88) RN - 0 (NF-kappa B) RN - 0 (TICAM-1 protein, mouse) RN - 0 (Tlr4 protein, mouse) RN - 0 (Toll-Like Receptor 4) SB - IM MH - Adaptor Proteins, Vesicular Transport/genetics MH - Animals MH - Cell Line MH - Cells, Cultured MH - Cytokines/metabolism MH - HEK293 Cells MH - HMGB1 Protein/*metabolism MH - Humans MH - Lipopolysaccharide Receptors/genetics/*metabolism MH - Lymphocyte Antigen 96/metabolism MH - Macrophages, Peritoneal/*metabolism MH - Male MH - Mice MH - Mice, Inbred C57BL MH - Mice, Knockout MH - Myeloid Differentiation Factor 88/genetics MH - NF-kappa B/metabolism MH - Toll-Like Receptor 4/genetics/*metabolism PMC - PMC3667211 EDAT- 2013/03/20 06:00 MHDA- 2013/12/25 06:00 PMCR- 2013/03/12 CRDT- 2013/03/20 06:00 PHST- 2012/08/29 00:00 [received] PHST- 2013/03/11 00:00 [accepted] PHST- 2013/03/20 06:00 [entrez] PHST- 2013/03/20 06:00 [pubmed] PHST- 2013/12/25 06:00 [medline] PHST- 2013/03/12 00:00 [pmc-release] AID - molmed.2012.00306 [pii] AID - 12_306_kim [pii] AID - 10.2119/molmed.2012.00306 [doi] PST - epublish SO - Mol Med. 2013 May 20;19(1):88-98. doi: 10.2119/molmed.2012.00306.