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Immune Complex Binding (Decoy)
- Molecular classification
- Receptor, Protein, Soluble Cytokine Decoy Receptor, Chemokine Decoy Receptor, Viral Entry Decoy Receptor, Autoantigen Mimic, Engineered fusion proteins
01
Overview
Immune complex binding (decoy) refers to a class of molecules—often termed *decoy receptors* or *decoys*—that bind immune complexes, ligands, or antibodies in the extracellular space. By doing so, they prevent these immune mediators from interacting with their natural cellular targets and modulate downstream signaling pathways. Decoy mechanisms are crucial in regulating inflammation, autoimmunity, and pathogen defense.
- Other names
- Decoy ReceptorSoluble TNF ReceptorD6/ACKR2Engineered ACE2-FcdsDNA-mimicking peptides
02
Mechanism of action
Competitive inhibition of ligand binding to cellular receptors, leading to neutralization of the ligand's biological activity and prevention of downstream signaling.
03
Biological functions
Immune regulationLigand bindingNeutralization of immune mediatorsInhibition of receptor signalingModulation of inflammationRegulation of leukocyte recruitmentViral entry blockade
04
Disease associations
InflammationAutoimmunityInfectious DiseaseSepsisCancer
05
Safety considerations
Unwanted Fc-mediated effects (e.g., excessive activation via FcγRs)Potential for off-target binding
06
Biomarkers
DcR3 (in sepsis)
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