Published in:
01-10-2008 | Original
High-dose intravenous immunoglobulin G improves systemic inflammation in a rat model of CLP-induced sepsis
Authors:
Satoshi Hagiwara, Hideo Iwasaka, Akira Hasegawa, Nobuhiko Asai, Takayuki Noguchi
Published in:
Intensive Care Medicine
|
Issue 10/2008
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Abstract
Objective
Intravenous immunoglobulin therapy has been proposed as an advanced treatment for sepsis. Yet, its benefit remains unclear and the mechanism of action is poorly understood. One key mediator in the development of sepsis is high mobility group box 1 (HMGB1). Therefore, we examined the serum and lung tissue levels of HMGB1 in a rat model of sepsis.
Design and setting
Prospective controlled animal study in a university laboratory.
Materials
Rats received either cecal ligation and puncture-induced sepsis or had additional intravenous immunoglobulin treatment in boluses of 100, 300, or 1,000 mg/kg.
Measurements and results
After induction of sepsis and respective treatment conditions, histopathology, wet/dry weight ratios, and signaling molecules were examined in pulmonary tissue. Serum and pulmonary levels of cytokine and HMGB1 were measured. High dose intravenous immunoglobulin (1,000 mg/kg)-treated animals demonstrated significantly improved survival and pulmonary histopathology compared to the control rats. Serum and pulmonary HMGB1 levels were lower over time among intravenous immunoglobulin-treated animals. Furthermore, administration of intravenous immunoglobulin resulted in inhibition of NF-κB activity.
Conclusions
High-dose intravenous immunoglobulin decreased the mortality and pulmonary pathology in a rat model of sepsis. A significant reduction in HMGB1 levels was also observed, which may be mediated by inhibition of inflammation and NF-κB.
Descriptor
23. Acute respiratory distress syndrome (ARDS) and acute lung injury (ALI): experimental models.