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Bench to bedside: HMGB1-a novel proinflammatory cytokine and potential therapeutic target for septic patients in the emergency department Sama AE; D'Amore J; Ward MF; Chen G; Wang HAcad Emerg Med 2004[Aug]; 11 (8): 867-73Overwhelming gram-negative bacterial infection and life-threatening systemic inflammation are widespread problems in critically ill emergency department patients. Currently, the treatment of these patients is largely supportive, focusing on antibiotics, fluids, hemodynamic and ventilatory support, and intensive monitoring. The only Food and Drug Administration-approved pharmaceutical agent for the treatment of sepsis is activated protein C, with its use largely relegated to the intensive care unit. The subject thus remains an active area of exploration for emergency medicine research. During sepsis and inflammation, innate immune cells release excessive amounts of proinflammatory cytokines such as tumor necrosis factor (TNF) and interleukin-1beta. If delivered early enough, anti-TNF antibodies can be an effective therapy in experimental models of septic shock. Anti-TNF antibodies have been developed for clinical use in rheumatoid arthritis and Crohn's disease. However, anti-TNF treatment for sepsis has been difficult to achieve in the clinical setting, perhaps because TNF's early release and transient appearance in the serum create a narrow therapeutic window. An alternative strategy would be to identify "late" mediators that may be clinically more accessible. High mobility group box 1 (HMGB1), a protein previously known only as a nuclear transcription factor, is now implicated as a late mediator of sepsis. Targeting late mediators of lethal systemic inflammation represents a novel approach that may widen the therapeutic window and lead to new strategies for inhibiting the deleterious effects of the inflammatory cascade. Here the authors review the studies that led to the discovery of HMGB1 as a late mediator of systemic inflammation and discuss the possibility of HMGB1 as a therapeutic target for septic patients in the emergency department.|Animals[MESH]|Biomarkers/analysis[MESH]|Disease Models, Animal[MESH]|Emergency Medicine/*methods[MESH]|HMGB1 Protein/analysis/*metabolism[MESH]|Humans[MESH]|Inflammation Mediators/analysis/metabolism[MESH]|Interleukin-1/antagonists & inhibitors/metabolism[MESH]|Macrophages/metabolism[MESH]|Protein C/therapeutic use[MESH]|Sepsis/*metabolism/physiopathology/*therapy[MESH]|Tumor Necrosis Factor-alpha/antagonists & inhibitors/metabolism[MESH] |
