Abstract
Sepsis is the consequence of a systemic bacterial infection that exacerbates the immune cell's activation via bacterial products, resulting in the augmented release of inflammatory mediators. A critical factor in the pathogenesis of sepsis is the primary component of the outer membrane of Gram-negative bacteria known as lipopolysaccharide (LPS), which is sensed by TLR4. For this reason, scientists have aimed to develop antagonists able to block TLR4 and, thereby the cytokine storm. We report here that a mixture of mu-class isoforms from the F. hepatica GST protein family administered intraperitoneally 1 h prior to a lethal LPS injection can modulate the dynamics and abundance of large peritoneal macrophages in the peritoneal cavity of septic mice while significantly suppressing the LPS-induced cytokine storm in a mouse model of septic shock. These results suggest that native F. hepatica glutathione S-transferase is a promising candidate for drug development against endotoxemia and other inflammatory diseases.
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