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Lipopolysaccharides (LPS)

Meaning

Lipopolysaccharides, commonly abbreviated as LPS, are large molecules composed of a lipid and a polysaccharide joined by a covalent bond, which form a major, integral component of the outer membrane of Gram-negative bacteria. Clinically, LPS functions as a potent endotoxin, meaning a toxin contained within the bacterial cell wall, which is released upon bacterial cell lysis. Systemic exposure to this molecule is a primary, powerful driver of innate immune activation and chronic inflammation.