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Extracellular HMGB1 as a proinflammatory cytokine.
Guoqian Chen1, Mary F Ward, Andrew E Sama
1Department of Emergency Medicine, North Shore University Hospital-New York University School of Medicine, Manhasset, NY 11030, USA.
Summary
High mobility group box-1 protein (HMGB1) is a nuclear protein that, when released, mediates inflammatory diseases like sepsis and arthritis. Inhibiting HMGB1 shows therapeutic potential for these conditions.
Area of Science:
- Biochemistry
- Immunology
- Molecular Biology
Background:
- High mobility group box-1 protein (HMGB1) is a conserved nuclear protein traditionally linked to DNA binding, nucleosome stabilization, and gene transcription.
- Emerging evidence highlights HMGB1's extracellular role as a potent mediator in inflammatory conditions.
Purpose of the Study:
- To investigate the role of HMGB1 in inflammatory diseases.
- To evaluate the therapeutic potential of inhibiting HMGB1 in preclinical models.
Main Methods:
- Review of existing literature on HMGB1 function.
- Analysis of studies involving HMGB1 inhibition in animal models of inflammation.
Main Results:
- HMGB1 is released from activated immune and necrotic cells, acting as a key mediator in endotoxemia, sepsis, arthritis, and local inflammation.
- Therapeutic strategies targeting HMGB1 release or activity demonstrated significant protective effects in animal models.
Conclusions:
- HMGB1 is a critical inflammatory mediator with implications beyond its nuclear functions.
- Inhibition of HMGB1 presents a promising therapeutic avenue for managing sepsis, arthritis, and other inflammatory diseases.