E5531, a Pure Endotoxin Antagonist of High Potency

William J. Christ, Osamu Asano, Andrea L. C. Robidoux, Michel Perez, Yuan Wang, Gloria R. Dubuc, Wendy Gavin, Lynn D. Hawkins, Pamela D. McGuinness, Maureen Mullarkey,

Science · 1995 · 323 citations · 20 references

Concepts

Abstract

Shock due to Gram-negative bacterial sepsis is a consequence of acute inflammatory response to lipopolysaccharide (LPS) or endotoxin released from bacteria. LPS is a major constituent of the outer membrane of Gram-negative bacteria, and its terminal disaccharide phospholipid (lipid A) portion contains the key structural features responsible for toxic activity. Based on the proposed structure of nontoxic Rhodobacter capsulatus lipid A, a fully stabilized endotoxin antagonist E5531 has been synthesized. In vitro, E5531 demonstrated potent antagonism of LPS-mediated cellular activation in a variety of systems. In vivo, E5531 protected mice from LPS-induced lethality and, in cooperation with an antibiotic, protected mice from a lethal infection of viable Escherichia coli.

References

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