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Lipid A Component of Lipopolysaccharide (Lipid A)
- Target
- Lipid A
- Molecular classification
- Lipid, Glycolipid, Bacterial cell wall component
01
Overview
Lipid A is a lipid component of lipopolysaccharide (LPS), located in the outer membrane of Gram-negative bacteria. It anchors LPS to the outer membrane and triggers a strong immune response via TLR4 activation, leading to inflammation and potentially fatal septic shock. Variations in its structure, particularly the number and type of acyl chains, influence its immunostimulatory properties.
- Other names
- EndotoxinLPS Lipid ALipopolysaccharide Lipid A
02
Mechanism of action
Activation of TLR4 leading to cytokine production and inflammatory response; direct interaction with immune cells.
03
Biological functions
Anchoring LPS in outer membraneActivation of innate immune responseTLR4 activationEndotoxic shock induction
04
Disease associations
SepsisSeptic shockInflammationGram-negative bacterial infection
05
Safety considerations
Induction of excessive inflammationPotential for septic shockDevelopment of antibiotic resistance
06
Interacting drugs
Anti-endotoxin antibodies (e.g., HA-1A)
2 more in the full profile.
07
Biomarkers
LPS levels in bloodCytokine levels (e.g., TNF-alpha, IL-6)TLR4 expression
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