PMID- 24302816 OWN - NLM STAT- MEDLINE DCOM- 20140605 LR - 20211021 IS - 1466-1861 (Electronic) IS - 0962-9351 (Print) IS - 0962-9351 (Linking) VI - 2013 DP - 2013 TI - HMGB1 acts in synergy with lipopolysaccharide in activating rheumatoid synovial fibroblasts via p38 MAPK and NF-kappaB signaling pathways. PG - 596716 LID - 10.1155/2013/596716 [doi] LID - 596716 AB - Synovial fibroblasts (SF) play a central role in the inflammatory and destructive process in rheumatoid arthritis (RA). High-mobility group box chromosomal protein 1 (HMGB1) or lipopolysaccharide (LPS) alone failed to induce significant changes in proliferation of cultured SF from RA patients, but premixed HMGB1 with LPS (HMGB1-LPS) significantly facilitated SF proliferation. HMGB1 alone failed to induce IL-6, MMP-3, and MMP-13 production in cultured SF but greatly enhanced LPS-induced expression of IL-6, MMP-3, and MMP-13 at both mRNA and protein levels. HMGB1-LPS synergistically upregulated TLR4 and receptor for advanced glycation endproducts (RAGE) expression on the surface of SF. Both blockers of TLR4 and RAGE significantly inhibited the synergistic effects of HMGB1-LPS on the production of IL-6 and MMPs, but blocking antibodies to TLR2 failed. HMGB1-LPS synergistically increased intracellular levels of phosphorylated p38 and phosphorylated I kappa B. Furthermore, both NF- kappa B inhibitor Bay11-7085 and p38 inhibitor SB203580 significantly suppressed the enhanced production of IL-6 and MMPs induced by HMGB1-LPS. In conclusion, HMGB1 acts in synergy with LPS to upregulate TLR4 and RAGE expression on the surface of SF in RA and then to augment IL-6, MMP-3, and MMP-13 production, which depends on p38 MAPK and NF-kappaB activation. FAU - He, Zheng-Wen AU - He ZW AD - Department of Laboratory Diagnosis, Changhai Hospital, Second Military Medical University, 168 Changhai Road, Shanghai 200433, China ; Department of Rheumatology & Immunology, Changhai Hospital, Second Military Medical University, 168 Changhai Road, Shanghai 200433, China. FAU - Qin, Yang-Hua AU - Qin YH FAU - Wang, Zhi-Wei AU - Wang ZW FAU - Chen, Yan AU - Chen Y FAU - Shen, Qian AU - Shen Q FAU - Dai, Sheng-Ming AU - Dai SM LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20131104 PL - United States TA - Mediators Inflamm JT - Mediators of inflammation JID - 9209001 RN - 0 (BAY 11-7085) RN - 0 (HMGB1 Protein) RN - 0 (HMGB1 protein, human) RN - 0 (IL6 protein, human) RN - 0 (Imidazoles) RN - 0 (Interleukin-6) RN - 0 (Lipopolysaccharides) RN - 0 (NF-kappa B p50 Subunit) RN - 0 (NFKB1 protein, human) RN - 0 (Nitriles) RN - 0 (Pyridines) RN - 0 (RNA, Messenger) RN - 0 (Receptor for Advanced Glycation End Products) RN - 0 (Receptors, Immunologic) RN - 0 (Sulfones) RN - 0 (TLR4 protein, human) RN - 0 (Toll-Like Receptor 4) RN - EC 2.7.11.24 (p38 Mitogen-Activated Protein Kinases) RN - EC 3.4.24.- (MMP13 protein, human) RN - EC 3.4.24.- (Matrix Metalloproteinase 13) RN - EC 3.4.24.17 (MMP3 protein, human) RN - EC 3.4.24.17 (Matrix Metalloproteinase 3) RN - OU13V1EYWQ (SB 203580) SB - IM MH - Adult MH - Aged MH - Arthritis, Rheumatoid/*metabolism MH - Cell Proliferation MH - Fibroblasts/*metabolism MH - Gene Expression Regulation MH - HMGB1 Protein/*metabolism MH - Humans MH - Imidazoles/pharmacology MH - Interleukin-6/metabolism MH - Lipopolysaccharides MH - Matrix Metalloproteinase 13/metabolism MH - Matrix Metalloproteinase 3/metabolism MH - Middle Aged MH - NF-kappa B p50 Subunit/*metabolism MH - Nitriles/pharmacology MH - Phosphorylation MH - Pyridines/pharmacology MH - RNA, Messenger/metabolism MH - Receptor for Advanced Glycation End Products MH - Receptors, Immunologic/metabolism MH - *Signal Transduction MH - Sulfones/pharmacology MH - Synovial Membrane/cytology MH - Toll-Like Receptor 4/metabolism MH - p38 Mitogen-Activated Protein Kinases/*metabolism PMC - PMC3834620 EDAT- 2013/12/05 06:00 MHDA- 2014/06/06 06:00 PMCR- 2013/11/04 CRDT- 2013/12/05 06:00 PHST- 2013/06/30 00:00 [received] PHST- 2013/09/05 00:00 [revised] PHST- 2013/09/21 00:00 [accepted] PHST- 2013/12/05 06:00 [entrez] PHST- 2013/12/05 06:00 [pubmed] PHST- 2014/06/06 06:00 [medline] PHST- 2013/11/04 00:00 [pmc-release] AID - 10.1155/2013/596716 [doi] PST - ppublish SO - Mediators Inflamm. 2013;2013:596716. doi: 10.1155/2013/596716. Epub 2013 Nov 4.